Mined Opinions For API: org.hibernate

This tab contains all the opinions collected from Stack Overflow about the API. The other tabs present summaries of the opinions using different algorithms.
  • That Really Cool, but i already have my ready thin client in java SE, i need to move the logic & SQL statement to server side, so the client just have the GUI.. details
  • I used Collection instead, see my answer but it is nice to know that it is not possible.. details
  • possible duplicate of [Mapping postgreSQL JSON column to Hibernate value type]( URL_http://stackoverflow.com/questions/15974474/mapping-postgresql-json - column-to-hibernate-value-type).. details
  • I want to get JSON like this : {"Id": 18, "Name": "Release"}.. details
  • Means its perfect now when the hibernate executes the query for Project insertion as insert into primavera.project (endDate, projectDesc, projectName, projectTitle, startDate) values (?, ?, ?, ?, ?). details
  • Can you please explain "This worked much better"?. details
  • The ORM is more happy with ROW itself.. details
  • A great answer to this question was provided here - URL_http://stackoverflow.com/questions/13459718/could-not-serialize-object- cause-of-hibernateproxy [Could-not-serialize-object-cause-of-HibernateProxy] The recommended way is to use a TypeAdapter without manually unproxying every object.Then you would register the TypeAdapter with Gson.. details
  • Thanks.. details
  • We upgraded to Jackson 2.1.0 and were able to get the hibernate module working.. details
  • Im developing web application using springMVC 3.2.6 and Hibernate 3.3.1 when I mapped a spring URL pattern as CODETERM1 and request a URL is CODETERM2 the method is working fine as checked in debug mode and CODETERM3 but the JSON is not generated and the output shows as The resource identified by this request is only capable of generating responses with characteristics not acceptable according to the request "accept" headers ().. details
  • Assume I have an attribute like this: CODESNIPPET_JAVA1 .. details
  • It looks like Hibernate does not support Postgres Json datatype.. details
  • You do like Ion says, you set FetchType.EAGER on the entity.. details
  • This is the cleanest and most proper way 3.. details
  • Finally, if (while still in the session) you do something like params.size() or canvasList.size(), this will automatically trigger the collection fetch from db.. details
  • This is a bit of a hack, but it works and you don't have to modify your DAO signature or the fetch strategy for the entity.. details
  • Any help would be greatly appreciated!. details
  • It uses AspectJ for most of its magic, but once you get past the mystique of AspectJ, it becomes quite intuitive.. details
  • Tools used: Spring-Roo: for rapid prototyping ( URL_http://projects.spring.io/spring-roo/ [ URL_http://projects.spring.io/spring-roo/ ] ) Spring Tool Suite Spring Maven Tomcat SqlServer Hibernate All of these tools work really well together to develop a web service.. details
  • And it works with more than SqlServer, hibernate, and Tomcat and doesn't require an IDE (altho Spring Tool Suite has a built in GUI shell), but it depends on Maven.. details
  • Tools used: Spring-Roo: for rapid prototyping ( URL_http://projects.spring.io/spring-roo/ [ URL_http://projects.spring.io/spring-roo/ ] ) Spring Tool Suite Spring Maven Tomcat SqlServer Hibernate All of these tools work really well together to develop a web service.. details
  • I absolutely love it.. details
  • Let me know if this helps clarify things!. details
  • Adding new queries can be done like so: CODESNIPPET_JAVA4 .. details
  • If libraries like Hibernate didn't allow for configuration, they wouldn't be of much use.. details
  • For instance lets say I want to store an object like this for multiple users: CODESNIPPET_JAVA1 .. details
  • I was thinking of something like this for a MySQL table structure (int)id, (int)parentId, (varchar)name, (bool)boolVal, (double)doubleVal, (varchar)stringVal, (enum)type This object would be represented like this CODESNIPPET_JAVA2 .. details
  • thanks!. details
  • Is there already a library out there that can accomplish this?. details
  • Can anybody please advise as to this technique.. details
  • I can return a User just fine.. details
  • Is there any think like GML Object, like we have Geometry Object?. details
  • An example code is shown below that doesn't look good.. details
  • Glad you found your problem.. details
  • It comes down to the use of hibernate mapping of type="date", changing to type="timestamp" resolved the issue.. details
  • Hibernate 4 module is only available for Jackson 2.0 (Hibernate 3 versions were available for both 1.x and 2.0).. details
  • Hibernate 4 module is only available for Jackson 2.0 (Hibernate 3 versions were available for both 1.x and 2.0).. details
  • Some examplecode about how to do this will be appreciated.. details
  • thanks .. details
  • Try setting hibernate.cache.use_structured_entries=true.. details
  • I'm glad it helped :-).. details
  • I would recommend using URL_http://www.hibernate.org/subprojects/validator.html [Bean-Validation-API] separately: that is, first bind data to a POJO, then validate POJO.. details
  • If you're planning on doing Java processing on the data, or you want to use a persistence framework like Hibernate, you'll need "Full Data Binding".. details
  • If you're planning on doing Java processing on the data, or you want to use a persistence framework like Hibernate, you'll need "Full Data Binding".. details
  • I really don't want to have to implement CODETERM1 as it's fine at the moment, it's just that key class I want the fields flattened.. details
  • I would prefer this to be serialized as: CODESNIPPET_JAVA2 .. details
  • This way the columns might be human readable.. details
  • Thanks .. details
  • Thanks .. details
  • Please suggest.. details
  • But if your making something more sophisticated, I suggest you to use Jackson for parsing and Hibernate as a middleware between application and sql database.. details
  • Or if you prefer Hibernate, use URL_https://github.com/FasterXML/jackson- module-hibernate [Jackson-Hibernate-module] to handle some edge cases there may be when reading/writing POHOs as JSON.. details
  • Aside from Jersey (and other JAX-RS impls like RESTeasy), which use Jackson, you might also benefit from using something like URL_http://jdbi.org/ [jDBI] for binding relational data in POJOs first.It does many things bigger ORMs (like Hibernate) do, but is simpler to use for most common tasks.. details
  • Or maybe I might just want to create a server side tool that can query a large list of text files, and serve those files as objects accessible over HTTP... The catch here, however, is that I want to do this in a language neutral way (using the hibernate analogy, I'd like my hibernate generator to generate DAO classes both in PHP AND in Java, for example).. details
  • Afterward I would like to convert that into a pretty JSON that has all the attribute name.. details
  • What's a good strategy?thanks .. details
  • Interesting note: I get 406 error, but the hibernate query works meanwhile.. details
  • Feel free to ask questions... .. details
  • _edit_:Conversion of simple forms/objects is working fine when they just have a couple of string properties and related getters/setters.. details
  • Suggestions welcome.. details
  • While rendering, accessing this collections, hibernate tries to get the values from Database using proxies.. details
  • You can either set your fetching strategy to EAGER (if you use annotations) like this:@OneToMany(fetch=FetchType.EAGER) In this method you must be aware, that you can not allow more than one PersistentBag initialized eagerly.. details
  • That's pretty awesome.. details
  • it is more efficient from a bandwidth perspective to exlucde certain large data properties.. details
  • In short this is a Maven/Java/Spring/Hibernate/MySQL solution, the reason being is that I have been using this architecture recently and found it quite simple and powerful to do what is really just converting SQL JSON!. details
  • There is a tiny amount of configuration here, so just execute the following to set up some environment variables: CODETERM1 Enter CODETERM2 Enter CODETERM3 Enter Typing CODETERM4 can then be used to verify that Java and Maven are installed and found correctly.. details
  • Maven will download some standard libraries and eventually prompt you to "Define value for property 'version':" - just Enter to continue.. details
  • Summary There are many variations on this solution and in practice you should put the classes in a better directory structure (model, view, controller) and create some Java class templates for handling the persistence, since all models will probalby need a "save", "find" method for example.. details
  • If you need to create a document to describe your API then the URL_http://confluence.atlassian.com/display/REST/At lassian+REST+API+Design+Guidelines+version+1 [Atlassian-guidelines] are very well written.. details
  • I hope this solution is useful to someone :-) .. details
  • it is more efficient from a bandwidth perspective to exlucde certain large data properties.. details
  • I hope this solution is useful to someone :-) .. details
  • If you need to create a document to describe your API then the URL_http://confluence.atlassian.com/display/REST/At lassian+REST+API+Design+Guidelines+version+1 [Atlassian-guidelines] are very well written.. details
  • Given an entity pojo, I can annotate it with Hibernate, JAXB and JSON annotations so that the same class can be written to the database as well as serialize/deserialize for message exchange.. details
  • If you need that collection only in this particular case, instruct Hibernate to load it eagerly in this case: With CODETERM4 clause: CODESNIPPET_JAVA2 .. details
  • Thanks .. details
  • For what it's worth, there is URL_https://github.com/FasterXML/jackson-module- hibernate [Jackson-Hibernate-module] project that just started, and which should solve this problem and hopefully others as well.Project is related to Jackson project, although not part of core source.. details
  • I am tempted to ditch Hibernate altogether :/ .. details
  • I have done the same thing for all the other UserAccount subclasses as well.. details
  • Also, Jackson 1.6 has support for URL_http://wiki.fasterxml.com/JacksonFeatureBiDirReferences [handling-bi- directional-references] ... which seems like what you are looking for ( URL_http://jackson-users.ning.com/profiles/blogs/using-bidirectional-feature [this-blog-entry] also mentions the feature) And as of July 2011, there is also " URL_https://github.com/FasterXML/jackson- module-hibernate [jackson-module-hibernate] " which might help in some aspects of dealing with Hibernate objects, although not necessarily this particular one (which does require annotations).. details
  • Thank you in advance & Best Regards.. details
  • Or JavaServer Pages?What is the best method to handle JSON and HTTP GET/POST requests?. details
  • The example I'm working with models the relationship between employees andteams.. details
  • Behind this I have some Hibernate annotated POJOs: one for team, and onefor employee, with a 1-N relationship between the two (remember that anEmployee may not be a member of a team!).. details
  • The properties for the two entities look like this: CODESNIPPET_JAVA2 .. details
  • Did you mean to paste in some code for us to help you resolve your issue?. details
  • Did you mean to paste in some code for us to help you resolve your issue?. details
  • Here I am assuming that what you want is basically something like: CODESNIPPET_JAVA1 .. details
  • and after that error again 33752 [http-8085-3] ERROR org.hibernate.property.BasicPropertyAccessor - IllegalArgumentException in class: com.kintu.projectmgt.model.Task, getter method of property: taskId**.. details
  • It's very strage: I previously set this parameter but I got an "out of memory" error.. details
  • So what is the problem?. details
  • Is there a problem with managed reference?. details
  • Hibernate can spend a lot of time doing dirty checking on flush if your session is huge.. details
  • It's very strage: I previously set this parameter but I got an "out of memory" error.. details
  • I have learned that PostgreSQL has a URL_http://www.postgresql.org/docs/9.2/static/datatype-json.html [JSON] data type, so I want to use this datatype instead of string (varchar).. details
  • I am getting the following error: CODETERM1 Configuration: CODESNIPPET_JAVA1 .. details
  • But it will make the method transactional so be careful with unwanted consequences.. details
  • So the property is lazily loaded and when you try to access it outside the session, hibernate will not be able to fetch it from DB.. details
  • And you may not want that, because it may slow down your app.. details
  • You have several other options, described in hibernate "lazily init exception" threads like : URL_http://stackoverflow.com/questions/5404599/failed-to- lazily-initialize-a-collection-of-role [failed-to-lazily-initialize-a -collection-of-role] .. details
  • Because of the Hibernate lazy loading at the serialization time you end up with Hibernate proxy collections.. details
  • Im trying to convert a collection (obtained from Hibernate) to json string using Gson for use in my restful service.But, the service is giving me http 500 error.. details
  • Now when i debugged it , i found that the returned list had references of ClientLookup as ClientLookup$$Enhance... because of which is causing the problem.I tried to remove the proxies also but didn help.This is what I had tried to remove the proxy (found at one SO results) CODESNIPPET_JAVA3 .. details
  • I had also added lazy="no-proxy" in hbm file but to no avail CODESNIPPET_JAVA5 .. details
  • Now when i debugged it , i found that the returned list had references of ClientLookup as ClientLookup$$Enhance... because of which is causing the problem.I tried to remove the proxies also but didn help.This is what I had tried to remove the proxy (found at one SO results) CODESNIPPET_JAVA3 .. details
  • Error trace is as under : CODESNIPPET_JAVA4 .. details
  • eugene's annotation based solution is ok, but there is no need for additional annotation and ExclusionStrategy implementation in this case.. details
  • I want to use my example also to show you at the same time the effect of an empty object, so compare source to destination addresses in the final JSON.. details
  • What I want to do is store an arbitrary JSON object that I don't know the structure of and still be able to get decent select speed.. details
  • I mean that in this condition if (entity != null && entity instanceof HibernateProxy) the result is false.. details
  • Unfortunately I have got still the same error.. details
  • It seems that when Spring used Jackson to serialize one of my hibernate entities into it's JSON version, hibernate was trying to lazy load one of that entity's properties, but since the entity was outside of its transaction at that point (being "in" the controller), it caused an exception, which just got swallowed up.. details
  • It seems that when Spring used Jackson to serialize one of my hibernate entities into it's JSON version, hibernate was trying to lazy load one of that entity's properties, but since the entity was outside of its transaction at that point (being "in" the controller), it caused an exception, which just got swallowed up.. details
  • Unfortunately I seem to be having a lot of issues with collections embedded in my JSONs.. details
  • But when I try to return a list of challenges, everything blows up!. details
  • Unfortunately I seem to be having a lot of issues with collections embedded in my JSONs.. details
  • I've had the same problems with hibernate and this URL_https://github.com/FasterXML/jackson-module-hibernate [little-module] did just that: my Jackson now serializes Hibernate specific objects and datatypes.. details
  • and here's the code used for getting records from the DB (stripped of all the unnecessary parts): CODESNIPPET_JAVA2 .. details
  • URL_http://stackoverflow.com/questions/13354766/avoid-hibernate-lazy- initialization-exception [In-this-question] the answer to avoid the lazy init exception when json serializing was to set null to the variables that cause lazy init exception.. details
  • Now with the code base is grown and every time I have to set null to the troublesome variables everywhere in the code to avoid json serializing problem.. details
  • A better way to avoid hibernate lazy init exception when serializing in to a json response.. details
  • This is in reference URL_http://stackoverflow.com/questions/13354766/avoid- hibernate-lazy-initialization-exception [to-a-question-I-asked-a-month-back] .. details
  • URL_http://stackoverflow.com/questions/13354766/avoid-hibernate-lazy- initialization-exception [In-this-question] the answer to avoid the lazy init exception when json serializing was to set null to the variables that cause lazy init exception.. details
  • A better way to avoid hibernate lazy init exception when serializing in to a json response.. details
  • Now with the code base is grown and every time I have to set null to the troublesome variables everywhere in the code to avoid json serializing problem.. details
  • Instead, you can transfer the data to the client in a block fashion, so when the user is editing the first part the second part can be loaded in the background.. details
  • The browser may hang too(from my experience).. details
  • The problem seems to be the same that happens when hibernate proxied objects are serialized but I don't know how and if I can use the Jackson-hibernate- module to solve my issue.. details
  • The problem seems to be the same that happens when hibernate proxied objects are serialized but I don't know how and if I can use the Jackson-hibernate- module to solve my issue.. details
  • I am relatively new to jackson and am trying to import json into mysql through hibernate 3.3 and vice verse and having problem about jackson-module-hibernate From its github site: ObjectMapper mapper new ObjectMapper();mapper.registerModule(new HibernateModule()); and I think I need to change it to : mapper.registerModule(new Hibernate4Module()); However, there is a type mismatch : mapper.registerModule expects org.codehaus.jackson.map.Module interface,but the Hibernate4Module extends com.fasterxml.jackson.databind.Module.. details
  • Therefore, I get compilation error.. details
  • Therefore, I get compilation error.. details
  • I'm doing this a lot of time using hibernate and then converting the object of collections into json using URL_http://flexjson.sourceforge.net/ [flexjson] .. details
  • Unfortunately when I was implementing CODETERM1 methods in my application I have got an error: CODESNIPPET_JAVA1 .. details
  • not a solution still same error.. details
  • not a solution still same error.. details
  • check this answer, might be a hibernate bug: URL_http://stackoverflow.com/questions/3631349/how-do-i-cure-the-cause-of - hibernate-exception-illegalargumentexception-occurre.. details
  • check this answer, might be a hibernate bug: URL_http://stackoverflow.com/questions/3631349/how-do-i-cure-the-cause-of - hibernate-exception-illegalargumentexception-occurre.. details
  • ones that use format being validated (XML Schema and JSON Schema both have this basic flaw).Doing this makes code more modular, reusable, and separates concerns (serialization, data validation).. details
  • UPDATE Turns out it's not spring that's causing the problem, it's actually hibernates proxy classes causing the problem.. details
  • UPDATE Turns out it's not spring that's causing the problem, it's actually hibernates proxy classes causing the problem.. details
  • Hibernate One-to-Many relationship data insertion error.. details
  • The query is set-up to order it properly it just needs to be merged at the same index level.. details
  • My problem is with 3, I am not sure how to go about the merging the data.. details
  • I got scared here from all frightening suggestions, which i guess relevant in case of Hibernate and lazy loading...However, in my case i got the error since in an inner class i had no getters/setters, so the BeanSerializer could not serialize the data.... details
  • I got scared here from all frightening suggestions, which i guess relevant in case of Hibernate and lazy loading...However, in my case i got the error since in an inner class i had no getters/setters, so the BeanSerializer could not serialize the data.... details
  • i got the same error, but with no relation to Hibernate.. details
  • i got the same error, but with no relation to Hibernate.. details
  • I have a problem, I'm trying to convert an SQLQuery object result (from Hibernate) to a JSON.. details
  • What could the problem be?. details
  • Adding layers between the two (such as manually handling data binding) can help but is more work.This is not unique to JSON (XML data binding with libs like JAXB has similar challenges), or even data formats: Hibernate and other ORM libs can also add more close-coupling.Another potential challenge is that of losing visibility into what is happening: data binding is often a black box, and when things work, that's great (fewer things to worry about), but when they don't trouble-shooting may be more difficult.. details
  • Secondly, the object it is bound to is quite a complex hibernate entity object and I am experiencing problems converting the json to an instance of the object - it has references to other objects etc etc, well actually I am not sure what the exact problems are as the error message is not particularly clear: Content type 'application/json' not supported**.. details
  • Or, should I track down the problem fields in the entity object/form that are causing the json conversion to fail , this will be time-consuming and dull, but the end result seems to me to be neater.. details
  • Or, should I track down the problem fields in the entity object/form that are causing the json conversion to fail , this will be time-consuming and dull, but the end result seems to me to be neater.. details
  • Secondly, the object it is bound to is quite a complex hibernate entity object and I am experiencing problems converting the json to an instance of the object - it has references to other objects etc etc, well actually I am not sure what the exact problems are as the error message is not particularly clear: Content type 'application/json' not supported**.. details
  • For that reason you get this exception.. details
  • For that reason you get this exception.. details
  • When calling getmainsubjects.html?id=1 I get the error: net.sf.json.JSONException: org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: fi.utu.tuha.domain.Mainsubjects.aiForms, no session or session was closed How to fix?. details
  • Holy hell.. details
  • I think that the list returned from the hibernate is another type java.util.Collections$CheckedRandomAccessListI get the following exception (below).. details
  • I think that the list returned from the hibernate is another type java.util.Collections$CheckedRandomAccessListI get the following exception (below).. details
  • Those changes will allow Maven to find the latest URL_http://in.relation.to/Bloggers/Hibernate361FinalRelease [Hibernate] and URL_http://www.springsource.org/documentation [Spring] libraries which are not always present in the default Maven repositories and also other libraries like the URL_http://hsqldb.org/ [HSQLDB] - an in-memory database used to test this example and JSON Java conversion.. details
  • Maven should download all he new libraries we just added in the POM and hopefully compile without error.. details
  • Please note that unfortunately I've not tested this last part as I don't have MySQL installed but hopefully it should work.. details
  • Be warned** that when Hibernate is configured with the following property CODETERM42 it will destroy the database when the web application is started, since Hibernate is scanning the CODETERM43 class and creating the table from the @Table, @Entity and @Column (and other) annotations.. details
  • It might not be practical to create an API to expose the individual properties.. details
  • Project Creation Create a directory for your source, let's use CODETERM5 On the command line again, navigate to that directory and execute: CODESNIPPET_JAVA2 .. details
  • Answering your questions (or not) 1) No idea, sorry.. details
  • Is there a better way to decouple these without subjecting yourself to tedious translation/conversion classes?. details
  • However, this always bothered me because it throughly ties your interface and messages with the structure and design of your data model.. details
  • I am having a problem converting data to json.. details
  • I am having a problem converting data to json.. details
  • but i get this exception when trying to convert to json string: CODESNIPPET_JAVA2 .. details
  • If anything, I think this is Hibernate's fault.. details
  • I had a similar problem with lazy loading via the hibernate proxy object.. details
  • Strange Jackson exception being thrown when serializing Hibernate object.. details
  • I trying to learn how to write RESTful apps in Java using Jersey andHibernate, and I'm struggling to understand how to handle parent/child typerelationships when POSTing data to a Resource.. details
  • I am writing a serializer to serialize POJO to JSON but stuck in circular reference problem.. details
  • I am writing a serializer to serialize POJO to JSON but stuck in circular reference problem.. details
  • To make it work you must both embed some object type information in data (where it is only useful for deserializing) and usually use external schema definition which otherwise would not be needed (like XML Schema for xml; since that's basically a generic type system).This has same problems as ORM has: Hibernate has to use ugly work-arounds (n+1 - way joins, "super tables" or discriminator fields).. details
Summaries the opinions about org.hibernate using topic modeling.
  • 0. collection case fetch solution find mysql simple spring maven sql: 8
    • Finally, if (while still in the session) you do something like params.size() or canvasList.size(), this will automatically trigger the collection fetch from db.. details
    • If libraries like Hibernate didn't allow for configuration, they wouldn't be of much use.. details
    • If you're planning on doing Java processing on the data, or you want to use a persistence framework like Hibernate, you'll need "Full Data Binding".. details
    • Afterward I would like to convert that into a pretty JSON that has all the attribute name.. details
    • In short this is a Maven/Java/Spring/Hibernate/MySQL solution, the reason being is that I have been using this architecture recently and found it quite simple and powerful to do what is really just converting SQL JSON!. details
    • I hope this solution is useful to someone :-) .. details
    • If you need that collection only in this particular case, instruct Hibernate to load it eagerly in this case: With JOIN FETCH clause: CODESNIPPET .. details
    • The properties for the two entities look like this: CODESNIPPET .. details
  • 1. pojo int varchar database structure model find jackson serialize entity: 8
    • The ORM is more happy with ROW itself.. details
    • I was thinking of something like this for a MySQL table structure (int)id, (int)parentId, (varchar)name, (bool)boolVal, (double)doubleVal, (varchar)stringVal, (enum)type This object would be represented like this CODESNIPPET .. details
    • I would recommend using Bean-Validation-API separately: that is, first bind data to a POJO, then validate POJO.. details
    • This way the columns might be human readable.. details
    • But if your making something more sophisticated, I suggest you to use Jackson for parsing and Hibernate as a middleware between application and sql database.. details
    • Summary There are many variations on this solution and in practice you should put the classes in a better directory structure (model, view, controller) and create some Java class templates for handling the persistence, since all models will probalby need a "save", "find" method for example.. details
    • Given an entity pojo, I can annotate it with Hibernate, JAXB and JSON annotations so that the same class can be written to the database as well as serialize/deserialize for message exchange.. details
    • Did you mean to paste in some code for us to help you resolve your issue?. details
  • 2. module jackson case edge pohos writing read model relationship employee: 3
    • Or if you prefer Hibernate, use module-hibernate [Jackson-Hibernate-module] to handle some edge cases there may be when reading/writing POHOs as JSON.. details
    • Or maybe I might just want to create a server side tool that can query a large list of text files, and serve those files as objects accessible over HTTP... The catch here, however, is that I want to do this in a language neutral way (using the hibernate analogy, I'd like my hibernate generator to generate DAO classes both in PHP AND in Java, for example).. details
    • The example I'm working with models the relationship between employees andteams.. details
  • 3. request url generate htm property spring header output accord response: 5
    • Im developing web application using springMVC 3.2.6 and Hibernate 3.3.1 when I mapped a spring URL pattern as *.htm and request a URL is getname.htm the method is working fine as checked in debug mode and system.out.println but the JSON is not generated and the output shows as The resource identified by this request is only capable of generating responses with characteristics not acceptable according to the request "accept" headers ().. details
    • I absolutely love it.. details
    • Interesting note: I get 406 error, but the hibernate query works meanwhile.. details
    • _edit_:Conversion of simple forms/objects is working fine when they just have a couple of string properties and related getters/setters.. details
    • Maven will download some standard libraries and eventually prompt you to "Define value for property 'version':" - just Enter to continue.. details
  • 4. column module http postgresql mapping duplicate javaserver request post jackson: 7
    • I want to get JSON like this : {"Id": 18, "Name": "Release"}.. details
    • possible duplicate of [Mapping postgreSQL JSON column to Hibernate value type]( - column-to-hibernate-value-type).. details
    • I used Collection instead, see my answer but it is nice to know that it is not possible.. details
    • We upgraded to Jackson 2.1.0 and were able to get the hibernate module working.. details
    • I can return a User just fine.. details
    • Glad you found your problem.. details
    • Or JavaServer Pages?What is the best method to handle JSON and HTTP GET/POST requests?. details
  • 5. team query employee relationship projectdesc remember pojos onefor primavera insertion: 9
    • Means its perfect now when the hibernate executes the query for Project insertion as insert into primavera.project (endDate, projectDesc, projectName, projectTitle, startDate) values (?, ?, ?, ?, ?). details
    • Any help would be greatly appreciated!. details
    • Let me know if this helps clarify things!. details
    • It uses AspectJ for most of its magic, but once you get past the mystique of AspectJ, it becomes quite intuitive.. details
    • Can anybody please advise as to this technique.. details
    • Some examplecode about how to do this will be appreciated.. details
    • While rendering, accessing this collections, hibernate tries to get the values from Database using proxies.. details
    • it is more efficient from a bandwidth perspective to exlucde certain large data properties.. details
    • Behind this I have some Hibernate annotated POJOs: one for team, and onefor employee, with a 1-N relationship between the two (remember that anEmployee may not be a member of a team!).. details
  • 6. fetchtype strategy fetch onetomany persistentbag fetching aware initialize entity ion: 5
    • You do like Ion says, you set FetchType.EAGER on the entity.. details
    • Is there any think like GML Object, like we have Geometry Object?. details
    • I would prefer this to be serialized as: CODESNIPPET .. details
    • What's a good strategy?thanks .. details
    • You can either set your fetching strategy to EAGER (if you use annotations) like this:@OneToMany(fetch=FetchType.EAGER) In this method you must be aware, that you can not allow more than one PersistentBag initialized eagerly.. details
  • 7. jackson module typeadapter hibernateproxy thing serialize answer question register references: 7
    • That Really Cool, but i already have my ready thin client in java SE, i need to move the logic & SQL statement to server side, so the client just have the GUI.. details
    • A great answer to this question was provided here - cause-of-hibernateproxy [Could-not-serialize-object-cause-of-HibernateProxy] The recommended way is to use a TypeAdapter without manually unproxying every object.Then you would register the TypeAdapter with Gson.. details
    • For instance lets say I want to store an object like this for multiple users: CODESNIPPET .. details
    • Aside from Jersey (and other JAX-RS impls like RESTeasy), which use Jackson, you might also benefit from using something like jDBI for binding relational data in POJOs first.It does many things bigger ORMs (like Hibernate) do, but is simpler to use for most common tasks.. details
    • If you need to create a document to describe your API then the lassian+REST+API+Design+Guidelines+version+1 [Atlassian-guidelines] are very well written.. details
    • I have done the same thing for all the other UserAccount subclasses as well.. details
    • Also, Jackson 1.6 has support for handling-bi- directional-references] ... which seems like what you are looking for ( this-blog-entry also mentions the feature) And as of July 2011, there is also " module-hibernate [jackson-module-hibernate] " which might help in some aspects of dealing with Hibernate objects, although not necessarily this particular one (which does require annotations).. details
  • 8. spring tool jackson module assume strategy entity maven develop roo: 22
    • Can you please explain "This worked much better"?. details
    • Thanks.. details
    • Assume I have an attribute like this: CODESNIPPET .. details
    • This is a bit of a hack, but it works and you don't have to modify your DAO signature or the fetch strategy for the entity.. details
    • This is the cleanest and most proper way 3.. details
    • Tools used: Spring-Roo: for rapid prototyping ( ) Spring Tool Suite Spring Maven Tomcat SqlServer Hibernate All of these tools work really well together to develop a web service.. details
    • Adding new queries can be done like so: CODESNIPPET .. details
    • Is there already a library out there that can accomplish this?. details
    • thanks!. details
    • An example code is shown below that doesn't look good.. details
    • Hibernate 4 module is only available for Jackson 2.0 (Hibernate 3 versions were available for both 1.x and 2.0).. details
    • thanks .. details
    • I'm glad it helped :-).. details
    • I really don't want to have to implement @JsonIgnore as it's fine at the moment, it's just that key class I want the fields flattened.. details
    • Thanks .. details
    • Please suggest.. details
    • Thanks .. details
    • Feel free to ask questions... .. details
    • That's pretty awesome.. details
    • Thanks .. details
    • For what it's worth, there is hibernate [Jackson-Hibernate-module] project that just started, and which should solve this problem and hopefully others as well.Project is related to Jackson project, although not part of core source.. details
    • Here I am assuming that what you want is basically something like: CODESNIPPET .. details
  • 9. maven enter tool bin apps path gui spring require suite: 8
    • It looks like Hibernate does not support Postgres Json datatype.. details
    • And it works with more than SqlServer, hibernate, and Tomcat and doesn't require an IDE (altho Spring Tool Suite has a built in GUI shell), but it depends on Maven.. details
    • It comes down to the use of hibernate mapping of type="date", changing to type="timestamp" resolved the issue.. details
    • Try setting hibernate.cache.use_structured_entries=true.. details
    • Suggestions welcome.. details
    • There is a tiny amount of configuration here, so just execute the following to set up some environment variables: set JAVA_HOME=c:\apps\java\jdk1.6.0_24 Enter set M2_HOME=c:\apps\apache-maven-3.0.3 Enter set PATH=%PATH%;%M2_HOME%\bin;%JAVA_HOME%\bin Enter Typing mvn --version can then be used to verify that Java and Maven are installed and found correctly.. details
    • I am tempted to ditch Hibernate altogether :/ .. details
    • Thank you in advance & Best Regards.. details
  • 0. mapper jackson module exception serialize init response avoid answer question: 3
    • A better way to avoid hibernate lazy init exception when serializing in to a json response.. details
    • not a solution still same error.. details
    • Answering your questions (or not) 1) No idea, sorry.. details
  • 1. entity exception load serialize property jackson spring swallow controller point: 5
    • It seems that when Spring used Jackson to serialize one of my hibernate entities into it's JSON version, hibernate was trying to lazy load one of that entity's properties, but since the entity was outside of its transaction at that point (being "in" the controller), it caused an exception, which just got swallowed up.. details
    • Unfortunately I seem to be having a lot of issues with collections embedded in my JSONs.. details
    • But when I try to return a list of challenges, everything blows up!. details
    • This is in reference hibernate-lazy-initialization-exception [to-a-question-I-asked-a-month-back] .. details
    • Instead, you can transfer the data to the client in a block fashion, so when the user is editing the first part the second part can be loaded in the background.. details
  • 2. time entity jackson mapper registermodule result module objectmapper hibernate4module conversion: 7
    • I have learned that PostgreSQL has a JSON data type, so I want to use this datatype instead of string (varchar).. details
    • I want to use my example also to show you at the same time the effect of an empty object, so compare source to destination addresses in the final JSON.. details
    • I mean that in this condition if (entity != null && entity instanceof HibernateProxy) the result is false.. details
    • I am relatively new to jackson and am trying to import json into mysql through hibernate 3.3 and vice verse and having problem about jackson-module-hibernate From its github site: ObjectMapper mapper new ObjectMapper();mapper.registerModule(new HibernateModule()); and I think I need to change it to : mapper.registerModule(new Hibernate4Module()); However, there is a type mismatch : mapper.registerModule expects org.codehaus.jackson.map.Module interface,but the Hibernate4Module extends com.fasterxml.jackson.databind.Module.. details
    • I'm doing this a lot of time using hibernate and then converting the object of collections into json using flexjson .. details
    • Or, should I track down the problem fields in the entity object/form that are causing the json conversion to fail , this will be time-consuming and dull, but the end result seems to me to be neater.. details
    • Maven should download all he new libraries we just added in the POM and hopefully compile without error.. details
  • 3. exception lazily init collection initialize role describe option thread load: 9
    • But it will make the method transactional so be careful with unwanted consequences.. details
    • So the property is lazily loaded and when you try to access it outside the session, hibernate will not be able to fetch it from DB.. details
    • You have several other options, described in hibernate "lazily init exception" threads like : lazily-initialize-a-collection-of-role [failed-to-lazily-initialize-a -collection-of-role] .. details
    • I had also added lazy="no-proxy" in hbm file but to no avail CODESNIPPET .. details
    • Error trace is as under : CODESNIPPET .. details
    • initialization-exception [In-this-question] the answer to avoid the lazy init exception when json serializing was to set null to the variables that cause lazy init exception.. details
    • My problem is with 3, I am not sure how to go about the merging the data.. details
    • The query is set-up to order it properly it just needs to be merged at the same index level.. details
    • but i get this exception when trying to convert to json string: CODESNIPPET .. details
  • 4. binding challenge add thing format happen schema directory exception serialize: 6
    • It's very strage: I previously set this parameter but I got an "out of memory" error.. details
    • The problem seems to be the same that happens when hibernate proxied objects are serialized but I don't know how and if I can use the Jackson-hibernate- module to solve my issue.. details
    • check this answer, might be a hibernate bug: - hibernate-exception-illegalargumentexception-occurre.. details
    • ones that use format being validated (XML Schema and JSON Schema both have this basic flaw).Doing this makes code more modular, reusable, and separates concerns (serialization, data validation).. details
    • Adding layers between the two (such as manually handling data binding) can help but is more work.This is not unique to JSON (XML data binding with libs like JAXB has similar challenges), or even data formats: Hibernate and other ORM libs can also add more close-coupling.Another potential challenge is that of losing visibility into what is happening: data binding is often a black box, and when things work, that's great (fewer things to worry about), but when they don't trouble-shooting may be more difficult.. details
    • Project Creation Create a directory for your source, let's use c:\src\project1 On the command line again, navigate to that directory and execute: CODESNIPPET .. details
  • 5. table create prop follow exception schema property entity key person: 6
    • and here's the code used for getting records from the DB (stripped of all the unnecessary parts): CODESNIPPET .. details
    • The browser may hang too(from my experience).. details
    • For that reason you get this exception.. details
    • I think that the list returned from the hibernate is another type java.util.Collections$CheckedRandomAccessListI get the following exception (below).. details
    • Be warned** that when Hibernate is configured with the following property <prop key="hibernate.hbm2ddl.auto">create</prop> it will destroy the database when the web application is started, since Hibernate is scanning the Person class and creating the table from the @Table, @Entity and @Column (and other) annotations.. details
    • To make it work you must both embed some object type information in data (where it is only useful for deserializing) and usually use external schema definition which otherwise would not be needed (like XML Schema for xml; since that's basically a generic type system).This has same problems as ORM has: Hibernate has to use ugly work-arounds (n+1 - way joins, "super tables" or discriminator fields).. details
  • 6. proxy remove find case result return loading serialize time learn: 8
    • Now when i debugged it , i found that the returned list had references of ClientLookup as ClientLookup$$Enhance... because of which is causing the problem.I tried to remove the proxies also but didn help.This is what I had tried to remove the proxy (found at one SO results) CODESNIPPET .. details
    • Now with the code base is grown and every time I have to set null to the troublesome variables everywhere in the code to avoid json serializing problem.. details
    • Therefore, I get compilation error.. details
    • UPDATE Turns out it's not spring that's causing the problem, it's actually hibernates proxy classes causing the problem.. details
    • I got scared here from all frightening suggestions, which i guess relevant in case of Hibernate and lazy loading...However, in my case i got the error since in an inner class i had no getters/setters, so the BeanSerializer could not serialize the data.... details
    • I have a problem, I'm trying to convert an SQLQuery object result (from Hibernate) to a JSON.. details
    • I had a similar problem with lazy loading via the hibernate proxy object.. details
    • I trying to learn how to write RESTful apps in Java using Jersey andHibernate, and I'm struggling to understand how to handle parent/child typerelationships when POSTing data to a Resource.. details
  • 7. collection session service jackson mainsubjects initialize role html aiforms lazyinitializationexception: 7
    • Because of the Hibernate lazy loading at the serialization time you end up with Hibernate proxy collections.. details
    • Im trying to convert a collection (obtained from Hibernate) to json string using Gson for use in my restful service.But, the service is giving me http 500 error.. details
    • I've had the same problems with hibernate and this little-module did just that: my Jackson now serializes Hibernate specific objects and datatypes.. details
    • i got the same error, but with no relation to Hibernate.. details
    • When calling getmainsubjects.html?id=1 I get the error: net.sf.json.JSONException: org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: fi.utu.tuha.domain.Mainsubjects.aiForms, no session or session was closed How to fix?. details
    • It might not be practical to create an API to expose the individual properties.. details
    • However, this always bothered me because it throughly ties your interface and messages with the structure and design of your data model.. details
  • 8. property maven conversion exception model illegalargumentexception spring taskid find projectmgt: 16
    • So what is the problem?. details
    • and after that error again 33752 [http-8085-3] ERROR org.hibernate.property.BasicPropertyAccessor - IllegalArgumentException in class: com.kintu.projectmgt.model.Task, getter method of property: taskId**.. details
    • I am getting the following error: javax.persistence.PersistenceException: org.hibernate.MappingException: No Dialect mapping for JDBC type: 1111 Configuration: CODESNIPPET .. details
    • And you may not want that, because it may slow down your app.. details
    • What I want to do is store an arbitrary JSON object that I don't know the structure of and still be able to get decent select speed.. details
    • Unfortunately I have got still the same error.. details
    • Unfortunately when I was implementing HibernateProxy methods in my application I have got an error: CODESNIPPET .. details
    • Hibernate One-to-Many relationship data insertion error.. details
    • What could the problem be?. details
    • Holy hell.. details
    • Those changes will allow Maven to find the latest Hibernate and Spring libraries which are not always present in the default Maven repositories and also other libraries like the HSQLDB - an in-memory database used to test this example and JSON Java conversion.. details
    • Please note that unfortunately I've not tested this last part as I don't have MySQL installed but hopefully it should work.. details
    • Is there a better way to decouple these without subjecting yourself to tedious translation/conversion classes?. details
    • I am having a problem converting data to json.. details
    • If anything, I think this is Hibernate's fault.. details
    • Strange Jackson exception being thrown when serializing Hibernate object.. details
  • 9. solution serialize entity base content spend case session checking bind: 5
    • Hibernate can spend a lot of time doing dirty checking on flush if your session is huge.. details
    • Is there a problem with managed reference?. details
    • eugene's annotation based solution is ok, but there is no need for additional annotation and ExclusionStrategy implementation in this case.. details
    • Secondly, the object it is bound to is quite a complex hibernate entity object and I am experiencing problems converting the json to an instance of the object - it has references to other objects etc etc, well actually I am not sure what the exact problems are as the error message is not particularly clear: Content type 'application/json' not supported**.. details
    • I am writing a serializer to serialize POJO to JSON but stuck in circular reference problem.. details
Summaries of the opinions about org.hibernate using three algorithms (Textrank, Lexrank and Luhn) adopted from extractive summarization. Each algorithm was used once for the positive opinions and once for the negative opinions.
  • But if your making something more sophisticated, I suggest you to use Jackson for parsing and Hibernate as a middleware between application and sql database .
  • For what it's worth, there is hibernate Jackson Hibernate module project that just started, and which should solve this problem and hopefully others as well Project is related to Jackson project, although not part of core source .
  • Given an entity pojo, I can annotate it with Hibernate, JAXB and JSON annotations so that the same class can be written to the database as well as serialize deserialize for message exchange .
  • Here I am assuming that what you want is basically something like: CODESNIPPET JAVA1 .
  • You can either set your fetching strategy to EAGER (if you use annotations) like this:@OneToMany(fetch=FetchType EAGER) In this method you must be aware, that you can not allow more than one PersistentBag initialized eagerly .
  • If libraries like Hibernate didn't allow for configuration, they wouldn't be of much use .
  • In short this is a Maven Java Spring Hibernate MySQL solution, the reason being is that I have been using this architecture recently and found it quite simple and powerful to do what is really just converting SQL JSON!.
  • I really don't want to have to implement @JsonIgnore as it's fine at the moment, it's just that key class I want the fields flattened .
  • This is a bit of a hack, but it works and you don't have to modify your DAO signature or the fetch strategy for the entity .
  • I used Collection instead, see my answer but it is nice to know that it is not possible .
  • For what it's worth, there is hibernate Jackson Hibernate module project that just started, and which should solve this problem and hopefully others as well Project is related to Jackson project, although not part of core source .
  • Given an entity pojo, I can annotate it with Hibernate, JAXB and JSON annotations so that the same class can be written to the database as well as serialize deserialize for message exchange .
  • Also, Jackson 1 6 has support for handling bi directional references which seems like what you are looking for ( this blog entry also mentions the feature) And as of July 2011, there is also " module hibernate jackson module hibernate " which might help in some aspects of dealing with Hibernate objects, although not necessarily this particular one (which does require annotations) .
  • A great answer to this question was provided here cause of hibernateproxy Could not serialize object cause of HibernateProxy The recommended way is to use a TypeAdapter without manually unproxying every object Then you would register the TypeAdapter with Gson .
  • Im developing web application using springMVC 3 2 6 and Hibernate 3 3 1 when I mapped a spring URL pattern as *.htm and request a URL is getname.htm the method is working fine as checked in debug mode and system.out.println but the JSON is not generated and the output shows as The resource identified by this request is only capable of generating responses with characteristics not acceptable according to the request "accept" headers () .
  • In short this is a Maven Java Spring Hibernate MySQL solution, the reason being is that I have been using this architecture recently and found it quite simple and powerful to do what is really just converting SQL JSON!.
  • I really don't want to have to implement @JsonIgnore as it's fine at the moment, it's just that key class I want the fields flattened .
  • This is a bit of a hack, but it works and you don't have to modify your DAO signature or the fetch strategy for the entity .
  • Or maybe I might just want to create a server side tool that can query a large list of text files, and serve those files as objects accessible over HTTP The catch here, however, is that I want to do this in a language neutral way (using the hibernate analogy, I'd like my hibernate generator to generate DAO classes both in PHP AND in Java, for example) .
  • That Really Cool, but i already have my ready thin client in java SE, i need to move the logic & SQL statement to server side, so the client just have the GUI .
  • For what it's worth, there is hibernate Jackson Hibernate module project that just started, and which should solve this problem and hopefully others as well Project is related to Jackson project, although not part of core source .
  • Given an entity pojo, I can annotate it with Hibernate, JAXB and JSON annotations so that the same class can be written to the database as well as serialize deserialize for message exchange .
  • Also, Jackson 1 6 has support for handling bi directional references which seems like what you are looking for ( this blog entry also mentions the feature) And as of July 2011, there is also " module hibernate jackson module hibernate " which might help in some aspects of dealing with Hibernate objects, although not necessarily this particular one (which does require annotations) .
  • You can either set your fetching strategy to EAGER (if you use annotations) like this:@OneToMany(fetch=FetchType EAGER) In this method you must be aware, that you can not allow more than one PersistentBag initialized eagerly .
  • Im developing web application using springMVC 3 2 6 and Hibernate 3 3 1 when I mapped a spring URL pattern as *.htm and request a URL is getname.htm the method is working fine as checked in debug mode and system.out.println but the JSON is not generated and the output shows as The resource identified by this request is only capable of generating responses with characteristics not acceptable according to the request "accept" headers () .
  • In short this is a Maven Java Spring Hibernate MySQL solution, the reason being is that I have been using this architecture recently and found it quite simple and powerful to do what is really just converting SQL JSON!.
  • There is a tiny amount of configuration here, so just execute the following to set up some environment variables: set JAVA_HOME=c:\apps\java\jdk1.6.0_24 Enter set M2_HOME=c:\apps\apache-maven-3.0.3 Enter set PATH=%PATH%;%M2_HOME%\bin;%JAVA_HOME%\bin Enter Typing mvn --version can then be used to verify that Java and Maven are installed and found correctly .
  • Summary There are many variations on this solution and in practice you should put the classes in a better directory structure (model, view, controller) and create some Java class templates for handling the persistence, since all models will probalby need a "save", "find" method for example .
  • Or maybe I might just want to create a server side tool that can query a large list of text files, and serve those files as objects accessible over HTTP The catch here, however, is that I want to do this in a language neutral way (using the hibernate analogy, I'd like my hibernate generator to generate DAO classes both in PHP AND in Java, for example) .
  • Aside from Jersey (and other JAX RS impls like RESTeasy), which use Jackson, you might also benefit from using something like jDBI for binding relational data in POJOs first It does many things bigger ORMs (like Hibernate) do, but is simpler to use for most common tasks .
  • I have a problem, I'm trying to convert an SQLQuery object result (from Hibernate) to a JSON .
  • I got scared here from all frightening suggestions, which i guess relevant in case of Hibernate and lazy loading However, in my case i got the error since in an inner class i had no getters setters, so the BeanSerializer could not serialize the data .
  • Secondly, the object it is bound to is quite a complex hibernate entity object and I am experiencing problems converting the json to an instance of the object it has references to other objects etc etc, well actually I am not sure what the exact problems are as the error message is not particularly clear: Content type 'application json' not supported** .
  • Or, should I track down the problem fields in the entity object form that are causing the json conversion to fail , this will be time consuming and dull, but the end result seems to me to be neater .
  • but i get this exception when trying to convert to json string: CODESNIPPET JAVA2 .
  • The problem seems to be the same that happens when hibernate proxied objects are serialized but I don't know how and if I can use the Jackson hibernate module to solve my issue .
  • It seems that when Spring used Jackson to serialize one of my hibernate entities into it's JSON version, hibernate was trying to lazy load one of that entity's properties, but since the entity was outside of its transaction at that point (being "in" the controller), it caused an exception, which just got swallowed up .
  • Because of the Hibernate lazy loading at the serialization time you end up with Hibernate proxy collections .
  • So the property is lazily loaded and when you try to access it outside the session, hibernate will not be able to fetch it from DB .
  • So what is the problem?.
  • I got scared here from all frightening suggestions, which i guess relevant in case of Hibernate and lazy loading However, in my case i got the error since in an inner class i had no getters setters, so the BeanSerializer could not serialize the data .
  • Be warned** that when Hibernate is configured with the following property <prop key="hibernate.hbm2ddl.auto">create</prop> it will destroy the database when the web application is started, since Hibernate is scanning the Person class and creating the table from the @Table, @Entity and @Column (and other) annotations .
  • I am relatively new to jackson and am trying to import json into mysql through hibernate 3 3 and vice verse and having problem about jackson module hibernate From its github site: ObjectMapper mapper new ObjectMapper();mapper registerModule(new HibernateModule()); and I think I need to change it to : mapper registerModule(new Hibernate4Module()); However, there is a type mismatch : mapper registerModule expects org codehaus jackson map Module interface,but the Hibernate4Module extends com fasterxml jackson databind Module .
  • Now when i debugged it , i found that the returned list had references of ClientLookup as ClientLookup$$Enhance because of which is causing the problem I tried to remove the proxies also but didn help This is what I had tried to remove the proxy (found at one SO results) CODESNIPPET JAVA3 .
  • Adding layers between the two (such as manually handling data binding) can help but is more work This is not unique to JSON (XML data binding with libs like JAXB has similar challenges), or even data formats: Hibernate and other ORM libs can also add more close coupling Another potential challenge is that of losing visibility into what is happening: data binding is often a black box, and when things work, that's great (fewer things to worry about), but when they don't trouble shooting may be more difficult .
  • Secondly, the object it is bound to is quite a complex hibernate entity object and I am experiencing problems converting the json to an instance of the object it has references to other objects etc etc, well actually I am not sure what the exact problems are as the error message is not particularly clear: Content type 'application json' not supported** .
  • Or, should I track down the problem fields in the entity object form that are causing the json conversion to fail , this will be time consuming and dull, but the end result seems to me to be neater .
  • The problem seems to be the same that happens when hibernate proxied objects are serialized but I don't know how and if I can use the Jackson hibernate module to solve my issue .
  • It seems that when Spring used Jackson to serialize one of my hibernate entities into it's JSON version, hibernate was trying to lazy load one of that entity's properties, but since the entity was outside of its transaction at that point (being "in" the controller), it caused an exception, which just got swallowed up .
  • Instead, you can transfer the data to the client in a block fashion, so when the user is editing the first part the second part can be loaded in the background .
  • I got scared here from all frightening suggestions, which i guess relevant in case of Hibernate and lazy loading However, in my case i got the error since in an inner class i had no getters setters, so the BeanSerializer could not serialize the data .
  • I am relatively new to jackson and am trying to import json into mysql through hibernate 3 3 and vice verse and having problem about jackson module hibernate From its github site: ObjectMapper mapper new ObjectMapper();mapper registerModule(new HibernateModule()); and I think I need to change it to : mapper registerModule(new Hibernate4Module()); However, there is a type mismatch : mapper registerModule expects org codehaus jackson map Module interface,but the Hibernate4Module extends com fasterxml jackson databind Module .
  • initialization exception In this question the answer to avoid the lazy init exception when json serializing was to set null to the variables that cause lazy init exception .
  • Now when i debugged it , i found that the returned list had references of ClientLookup as ClientLookup$$Enhance because of which is causing the problem I tried to remove the proxies also but didn help This is what I had tried to remove the proxy (found at one SO results) CODESNIPPET JAVA3 .
  • To make it work you must both embed some object type information in data (where it is only useful for deserializing) and usually use external schema definition which otherwise would not be needed (like XML Schema for xml; since that's basically a generic type system) This has same problems as ORM has: Hibernate has to use ugly work arounds (n 1 way joins, "super tables" or discriminator fields) .
  • Adding layers between the two (such as manually handling data binding) can help but is more work This is not unique to JSON (XML data binding with libs like JAXB has similar challenges), or even data formats: Hibernate and other ORM libs can also add more close coupling Another potential challenge is that of losing visibility into what is happening: data binding is often a black box, and when things work, that's great (fewer things to worry about), but when they don't trouble shooting may be more difficult .
  • Secondly, the object it is bound to is quite a complex hibernate entity object and I am experiencing problems converting the json to an instance of the object it has references to other objects etc etc, well actually I am not sure what the exact problems are as the error message is not particularly clear: Content type 'application json' not supported** .
  • Or, should I track down the problem fields in the entity object form that are causing the json conversion to fail , this will be time consuming and dull, but the end result seems to me to be neater .
  • Those changes will allow Maven to find the latest Hibernate and Spring libraries which are not always present in the default Maven repositories and also other libraries like the HSQLDB an in memory database used to test this example and JSON Java conversion .
  • It seems that when Spring used Jackson to serialize one of my hibernate entities into it's JSON version, hibernate was trying to lazy load one of that entity's properties, but since the entity was outside of its transaction at that point (being "in" the controller), it caused an exception, which just got swallowed up .
Summaries of the opinions about org.hibernate using Opinosis, an abstractive summarizer of opinions..
  • lazy init exception .
  • still same error .
Summaries of the opinions about org.hibernate using contrastive viewpoints. Each entry contains a pair of positive and negative sentences that are most likely discussing about similar API features.
    • We upgraded to Jackson 2 1 0 and were able to get the hibernate module working .
    • Strange Jackson exception being thrown when serializing Hibernate object .
    • The properties for the two entities look like this: CODESNIPPET JAVA2 .
    • but i get this exception when trying to convert to json string: CODESNIPPET JAVA2 .
    • I would prefer this to be serialized as: CODESNIPPET JAVA2 .
    • but i get this exception when trying to convert to json string: CODESNIPPET JAVA2 .
    • If libraries like Hibernate didn't allow for configuration, they wouldn't be of much use .
    • If anything, I think this is Hibernate's fault .
Summaries of opinions about based on specific API aspects, such as, performance, usability, etc. The 'Overview' page provides an overview of the aspects detected in the opinions. The 'Trend' page shows the distribution of polarity over time for each aspect. The 'Positive Opinions' page groups positive opinions by the detected aspects. The 'Contrastive By Aspect' page shows paris of contrastive opinions under each aspect (where found).
Features:
  • possible duplicate of [Mapping postgreSQL JSON column to Hibernate value type]( URL_http://stackoverflow.com/questions/15974474/mapping-postgresql-json - column-to-hibernate-value-type).
  • And you may not want that, because it may slow down your app.
Documentation:
  • If you need to create a document to describe your API then the URL_http://confluence.atlassian.com/display/REST/At lassian+REST+API+Design+Guidelines+version+1 [Atlassian-guidelines] are very well written.
  • URL_http://stackoverflow.com/questions/13354766/avoid-hibernate-lazy- initialization-exception [In-this-question] the answer to avoid the lazy init exception when json serializing was to set null to the variables that cause lazy init exception.
Legal:
  • Feel free to ask questions... .
  • N/A
Compatibility:
  • Tools used: Spring-Roo: for rapid prototyping ( URL_http://projects.spring.io/spring-roo/ [ URL_http://projects.spring.io/spring-roo/ ] ) Spring Tool Suite Spring Maven Tomcat SqlServer Hibernate All of these tools work really well together to develop a web service.
  • N/A
Onlysentiment:
  • Thanks.
  • Therefore, I get compilation error.
Performance:
  • it is more efficient from a bandwidth perspective to exlucde certain large data properties.
  • N/A
Security:
  • If you're planning on doing Java processing on the data, or you want to use a persistence framework like Hibernate, you'll need "Full Data Binding".
  • N/A
Bug:
  • Glad you found your problem.
  • and after that error again 33752 [http-8085-3] ERROR org.hibernate.property.BasicPropertyAccessor - IllegalArgumentException in class: com.kintu.projectmgt.model.Task, getter method of property: taskId**.
Usability:
  • That Really Cool, but i already have my ready thin client in java SE, i need to move the logic & SQL statement to server side, so the client just have the GUI.
  • Hibernate can spend a lot of time doing dirty checking on flush if your session is huge.
  • Features: 15
    1. json: 2
      • possible duplicate of [Mapping postgreSQL JSON column to Hibernate value type]( URL_http://stackoverflow.com/questions/15974474/mapping-postgresql-json - column-to-hibernate-value-type).. details
      • I want to get JSON like this : {"Id": 18, "Name": "Release"}.. details
    2. object: 1
      • For instance lets say I want to store an object like this for multiple users: CODESNIPPET_JAVA1 .. details
    3. return: 1
      • I can return a User just fine.. details
    4. properties: 1
      • The properties for the two entities look like this: CODESNIPPET_JAVA2 .. details
    5. general: 10
      • Assume I have an attribute like this: CODESNIPPET_JAVA1 .. details
      • You do like Ion says, you set FetchType.EAGER on the entity.. details
      • Let me know if this helps clarify things!. details
      • Adding new queries can be done like so: CODESNIPPET_JAVA4 .. details
      • Some examplecode about how to do this will be appreciated.. details
      • Try setting hibernate.cache.use_structured_entries=true.. details
      • This way the columns might be human readable.. details
      • Please suggest.. details
      • I am tempted to ditch Hibernate altogether :/ .. details
      • Here I am assuming that what you want is basically something like: CODESNIPPET_JAVA1 .. details
  • Documentation: 3
    1. general: 3
      • If you need to create a document to describe your API then the URL_http://confluence.atlassian.com/display/REST/At lassian+REST+API+Design+Guidelines+version+1 [Atlassian-guidelines] are very well written.. details
      • I hope this solution is useful to someone :-) .. details
      • The example I'm working with models the relationship between employees andteams.. details
  • Legal: 1
    1. general: 1
      • Feel free to ask questions... .. details
  • Bug: 4
    1. general: 4
      • Glad you found your problem.. details
      • Hibernate 4 module is only available for Jackson 2.0 (Hibernate 3 versions were available for both 1.x and 2.0).. details
      • Interesting note: I get 406 error, but the hibernate query works meanwhile.. details
      • Did you mean to paste in some code for us to help you resolve your issue?. details
  • Onlysentiment: 12
    1. general: 12
  • Performance: 1
    1. general: 1
      • it is more efficient from a bandwidth perspective to exlucde certain large data properties.. details
  • Security: 1
    1. general: 1
      • If you're planning on doing Java processing on the data, or you want to use a persistence framework like Hibernate, you'll need "Full Data Binding".. details
  • Compatibility: 1
    1. general: 1
      • Tools used: Spring-Roo: for rapid prototyping ( URL_http://projects.spring.io/spring-roo/ [ URL_http://projects.spring.io/spring-roo/ ] ) Spring Tool Suite Spring Maven Tomcat SqlServer Hibernate All of these tools work really well together to develop a web service.. details
  • Usability: 51
    1. jackson: 5
      • We upgraded to Jackson 2.1.0 and were able to get the hibernate module working.. details
      • Hibernate 4 module is only available for Jackson 2.0 (Hibernate 3 versions were available for both 1.x and 2.0).. details
      • But if your making something more sophisticated, I suggest you to use Jackson for parsing and Hibernate as a middleware between application and sql database.. details
      • For what it's worth, there is URL_https://github.com/FasterXML/jackson-module- hibernate [Jackson-Hibernate-module] project that just started, and which should solve this problem and hopefully others as well.Project is related to Jackson project, although not part of core source.. details
      • Also, Jackson 1.6 has support for URL_http://wiki.fasterxml.com/JacksonFeatureBiDirReferences [handling-bi- directional-references] ... which seems like what you are looking for ( URL_http://jackson-users.ning.com/profiles/blogs/using-bidirectional-feature [this-blog-entry] also mentions the feature) And as of July 2011, there is also " URL_https://github.com/FasterXML/jackson- module-hibernate [jackson-module-hibernate] " which might help in some aspects of dealing with Hibernate objects, although not necessarily this particular one (which does require annotations).. details
    2. string: 1
      • _edit_:Conversion of simple forms/objects is working fine when they just have a couple of string properties and related getters/setters.. details
    3. database: 1
      • While rendering, accessing this collections, hibernate tries to get the values from Database using proxies.. details
    4. spring: 2
      • And it works with more than SqlServer, hibernate, and Tomcat and doesn't require an IDE (altho Spring Tool Suite has a built in GUI shell), but it depends on Maven.. details
      • Tools used: Spring-Roo: for rapid prototyping ( URL_http://projects.spring.io/spring-roo/ [ URL_http://projects.spring.io/spring-roo/ ] ) Spring Tool Suite Spring Maven Tomcat SqlServer Hibernate All of these tools work really well together to develop a web service.. details
    5. list: 1
      • Or maybe I might just want to create a server side tool that can query a large list of text files, and serve those files as objects accessible over HTTP... The catch here, however, is that I want to do this in a language neutral way (using the hibernate analogy, I'd like my hibernate generator to generate DAO classes both in PHP AND in Java, for example).. details
    6. mapping: 1
      • It comes down to the use of hibernate mapping of type="date", changing to type="timestamp" resolved the issue.. details
    7. general: 25
      • I used Collection instead, see my answer but it is nice to know that it is not possible.. details
      • Means its perfect now when the hibernate executes the query for Project insertion as insert into primavera.project (endDate, projectDesc, projectName, projectTitle, startDate) values (?, ?, ?, ?, ?). details
      • Can you please explain "This worked much better"?. details
      • The ORM is more happy with ROW itself.. details
      • A great answer to this question was provided here - URL_http://stackoverflow.com/questions/13459718/could-not-serialize-object- cause-of-hibernateproxy [Could-not-serialize-object-cause-of-HibernateProxy] The recommended way is to use a TypeAdapter without manually unproxying every object.Then you would register the TypeAdapter with Gson.. details
      • This is the cleanest and most proper way 3.. details
      • Finally, if (while still in the session) you do something like params.size() or canvasList.size(), this will automatically trigger the collection fetch from db.. details
      • This is a bit of a hack, but it works and you don't have to modify your DAO signature or the fetch strategy for the entity.. details
      • It uses AspectJ for most of its magic, but once you get past the mystique of AspectJ, it becomes quite intuitive.. details
      • If libraries like Hibernate didn't allow for configuration, they wouldn't be of much use.. details
      • Is there already a library out there that can accomplish this?. details
      • Can anybody please advise as to this technique.. details
      • Is there any think like GML Object, like we have Geometry Object?. details
      • An example code is shown below that doesn't look good.. details
      • I would prefer this to be serialized as: CODESNIPPET_JAVA2 .. details
      • Or if you prefer Hibernate, use URL_https://github.com/FasterXML/jackson- module-hibernate [Jackson-Hibernate-module] to handle some edge cases there may be when reading/writing POHOs as JSON.. details
      • You can either set your fetching strategy to EAGER (if you use annotations) like this:@OneToMany(fetch=FetchType.EAGER) In this method you must be aware, that you can not allow more than one PersistentBag initialized eagerly.. details
      • That's pretty awesome.. details
      • In short this is a Maven/Java/Spring/Hibernate/MySQL solution, the reason being is that I have been using this architecture recently and found it quite simple and powerful to do what is really just converting SQL JSON!. details
      • I hope this solution is useful to someone :-) .. details
      • If you need to create a document to describe your API then the URL_http://confluence.atlassian.com/display/REST/At lassian+REST+API+Design+Guidelines+version+1 [Atlassian-guidelines] are very well written.. details
      • If you need that collection only in this particular case, instruct Hibernate to load it eagerly in this case: With CODETERM4 clause: CODESNIPPET_JAVA2 .. details
      • I have done the same thing for all the other UserAccount subclasses as well.. details
      • Behind this I have some Hibernate annotated POJOs: one for team, and onefor employee, with a 1-N relationship between the two (remember that anEmployee may not be a member of a team!).. details
      • Did you mean to paste in some code for us to help you resolve your issue?. details
    8. maven: 2
      • There is a tiny amount of configuration here, so just execute the following to set up some environment variables: CODETERM1 Enter CODETERM2 Enter CODETERM3 Enter Typing CODETERM4 can then be used to verify that Java and Maven are installed and found correctly.. details
      • Maven will download some standard libraries and eventually prompt you to "Define value for property 'version':" - just Enter to continue.. details
    9. json: 5
      • Im developing web application using springMVC 3.2.6 and Hibernate 3.3.1 when I mapped a spring URL pattern as CODETERM1 and request a URL is CODETERM2 the method is working fine as checked in debug mode and CODETERM3 but the JSON is not generated and the output shows as The resource identified by this request is only capable of generating responses with characteristics not acceptable according to the request "accept" headers ().. details
      • It looks like Hibernate does not support Postgres Json datatype.. details
      • Afterward I would like to convert that into a pretty JSON that has all the attribute name.. details
      • Given an entity pojo, I can annotate it with Hibernate, JAXB and JSON annotations so that the same class can be written to the database as well as serialize/deserialize for message exchange.. details
      • Or JavaServer Pages?What is the best method to handle JSON and HTTP GET/POST requests?. details
    10. client: 1
      • That Really Cool, but i already have my ready thin client in java SE, i need to move the logic & SQL statement to server side, so the client just have the GUI.. details
    11. mysql: 1
      • I was thinking of something like this for a MySQL table structure (int)id, (int)parentId, (varchar)name, (bool)boolVal, (double)doubleVal, (varchar)stringVal, (enum)type This object would be represented like this CODESNIPPET_JAVA2 .. details
    12. data: 3
      • I would recommend using URL_http://www.hibernate.org/subprojects/validator.html [Bean-Validation-API] separately: that is, first bind data to a POJO, then validate POJO.. details
      • If you're planning on doing Java processing on the data, or you want to use a persistence framework like Hibernate, you'll need "Full Data Binding".. details
      • it is more efficient from a bandwidth perspective to exlucde certain large data properties.. details
    13. class: 2
      • I really don't want to have to implement CODETERM1 as it's fine at the moment, it's just that key class I want the fields flattened.. details
      • Summary There are many variations on this solution and in practice you should put the classes in a better directory structure (model, view, controller) and create some Java class templates for handling the persistence, since all models will probalby need a "save", "find" method for example.. details
    14. jersey: 1
      • Aside from Jersey (and other JAX-RS impls like RESTeasy), which use Jackson, you might also benefit from using something like URL_http://jdbi.org/ [jDBI] for binding relational data in POJOs first.It does many things bigger ORMs (like Hibernate) do, but is simpler to use for most common tasks.. details
  • Onlysentiment: 2
    1. general: 2
      • Therefore, I get compilation error.. details
      • If anything, I think this is Hibernate's fault.. details
  • Documentation: 3
    1. general: 3
      • This is in reference URL_http://stackoverflow.com/questions/13354766/avoid- hibernate-lazy-initialization-exception [to-a-question-I-asked-a-month-back] .. details
      • URL_http://stackoverflow.com/questions/13354766/avoid-hibernate-lazy- initialization-exception [In-this-question] the answer to avoid the lazy init exception when json serializing was to set null to the variables that cause lazy init exception.. details
      • check this answer, might be a hibernate bug: URL_http://stackoverflow.com/questions/3631349/how-do-i-cure-the-cause-of - hibernate-exception-illegalargumentexception-occurre.. details
  • Features: 9
    1. general: 9
      • But it will make the method transactional so be careful with unwanted consequences.. details
      • And you may not want that, because it may slow down your app.. details
      • Because of the Hibernate lazy loading at the serialization time you end up with Hibernate proxy collections.. details
      • But when I try to return a list of challenges, everything blows up!. details
      • Instead, you can transfer the data to the client in a block fashion, so when the user is editing the first part the second part can be loaded in the background.. details
      • Unfortunately when I was implementing CODETERM1 methods in my application I have got an error: CODESNIPPET_JAVA1 .. details
      • Holy hell.. details
      • Answering your questions (or not) 1) No idea, sorry.. details
      • I had a similar problem with lazy loading via the hibernate proxy object.. details
  • Bug: 36
    1. jackson: 2
      • I've had the same problems with hibernate and this URL_https://github.com/FasterXML/jackson-module-hibernate [little-module] did just that: my Jackson now serializes Hibernate specific objects and datatypes.. details
      • Strange Jackson exception being thrown when serializing Hibernate object.. details
    2. spring: 1
      • UPDATE Turns out it's not spring that's causing the problem, it's actually hibernates proxy classes causing the problem.. details
    3. object: 1
      • I have a problem, I'm trying to convert an SQLQuery object result (from Hibernate) to a JSON.. details
    4. list: 2
      • Now when i debugged it , i found that the returned list had references of ClientLookup as ClientLookup$$Enhance... because of which is causing the problem.I tried to remove the proxies also but didn help.This is what I had tried to remove the proxy (found at one SO results) CODESNIPPET_JAVA3 .. details
      • I think that the list returned from the hibernate is another type java.util.Collections$CheckedRandomAccessListI get the following exception (below).. details
    5. general: 17
      • and after that error again 33752 [http-8085-3] ERROR org.hibernate.property.BasicPropertyAccessor - IllegalArgumentException in class: com.kintu.projectmgt.model.Task, getter method of property: taskId**.. details
      • So what is the problem?. details
      • Is there a problem with managed reference?. details
      • It's very strage: I previously set this parameter but I got an "out of memory" error.. details
      • I am getting the following error: CODETERM1 Configuration: CODESNIPPET_JAVA1 .. details
      • You have several other options, described in hibernate "lazily init exception" threads like : URL_http://stackoverflow.com/questions/5404599/failed-to- lazily-initialize-a-collection-of-role [failed-to-lazily-initialize-a -collection-of-role] .. details
      • Error trace is as under : CODESNIPPET_JAVA4 .. details
      • Unfortunately I have got still the same error.. details
      • The problem seems to be the same that happens when hibernate proxied objects are serialized but I don't know how and if I can use the Jackson-hibernate- module to solve my issue.. details
      • Therefore, I get compilation error.. details
      • not a solution still same error.. details
      • check this answer, might be a hibernate bug: URL_http://stackoverflow.com/questions/3631349/how-do-i-cure-the-cause-of - hibernate-exception-illegalargumentexception-occurre.. details
      • My problem is with 3, I am not sure how to go about the merging the data.. details
      • i got the same error, but with no relation to Hibernate.. details
      • What could the problem be?. details
      • For that reason you get this exception.. details
      • When calling getmainsubjects.html?id=1 I get the error: net.sf.json.JSONException: org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: fi.utu.tuha.domain.Mainsubjects.aiForms, no session or session was closed How to fix?. details
    6. maven: 1
      • Maven should download all he new libraries we just added in the POM and hopefully compile without error.. details
    7. json: 7
      • It seems that when Spring used Jackson to serialize one of my hibernate entities into it's JSON version, hibernate was trying to lazy load one of that entity's properties, but since the entity was outside of its transaction at that point (being "in" the controller), it caused an exception, which just got swallowed up.. details
      • URL_http://stackoverflow.com/questions/13354766/avoid-hibernate-lazy- initialization-exception [In-this-question] the answer to avoid the lazy init exception when json serializing was to set null to the variables that cause lazy init exception.. details
      • A better way to avoid hibernate lazy init exception when serializing in to a json response.. details
      • Now with the code base is grown and every time I have to set null to the troublesome variables everywhere in the code to avoid json serializing problem.. details
      • Secondly, the object it is bound to is quite a complex hibernate entity object and I am experiencing problems converting the json to an instance of the object - it has references to other objects etc etc, well actually I am not sure what the exact problems are as the error message is not particularly clear: Content type 'application/json' not supported**.. details
      • Or, should I track down the problem fields in the entity object/form that are causing the json conversion to fail , this will be time-consuming and dull, but the end result seems to me to be neater.. details
      • I am writing a serializer to serialize POJO to JSON but stuck in circular reference problem.. details
    8. collections: 1
      • Unfortunately I seem to be having a lot of issues with collections embedded in my JSONs.. details
    9. null: 1
      • I mean that in this condition if (entity != null && entity instanceof HibernateProxy) the result is false.. details
    10. data: 2
      • Hibernate One-to-Many relationship data insertion error.. details
      • I am having a problem converting data to json.. details
    11. class: 1
      • I got scared here from all frightening suggestions, which i guess relevant in case of Hibernate and lazy loading...However, in my case i got the error since in an inner class i had no getters/setters, so the BeanSerializer could not serialize the data.... details
  • Usability: 42
    1. compare: 1
      • I want to use my example also to show you at the same time the effect of an empty object, so compare source to destination addresses in the final JSON.. details
    2. object: 1
      • To make it work you must both embed some object type information in data (where it is only useful for deserializing) and usually use external schema definition which otherwise would not be needed (like XML Schema for xml; since that's basically a generic type system).This has same problems as ORM has: Hibernate has to use ugly work-arounds (n+1 - way joins, "super tables" or discriminator fields).. details
    3. string: 1
      • I have learned that PostgreSQL has a URL_http://www.postgresql.org/docs/9.2/static/datatype-json.html [JSON] data type, so I want to use this datatype instead of string (varchar).. details
    4. database: 1
      • Be warned** that when Hibernate is configured with the following property CODETERM42 it will destroy the database when the web application is started, since Hibernate is scanning the CODETERM43 class and creating the table from the @Table, @Entity and @Column (and other) annotations.. details
    5. spring: 1
      • UPDATE Turns out it's not spring that's causing the problem, it's actually hibernates proxy classes causing the problem.. details
    6. mysql: 1
      • Please note that unfortunately I've not tested this last part as I don't have MySQL installed but hopefully it should work.. details
    7. list: 2
      • Now when i debugged it , i found that the returned list had references of ClientLookup as ClientLookup$$Enhance... because of which is causing the problem.I tried to remove the proxies also but didn help.This is what I had tried to remove the proxy (found at one SO results) CODESNIPPET_JAVA3 .. details
      • I think that the list returned from the hibernate is another type java.util.Collections$CheckedRandomAccessListI get the following exception (below).. details
    8. general: 12
      • It's very strage: I previously set this parameter but I got an "out of memory" error.. details
      • So the property is lazily loaded and when you try to access it outside the session, hibernate will not be able to fetch it from DB.. details
      • eugene's annotation based solution is ok, but there is no need for additional annotation and ExclusionStrategy implementation in this case.. details
      • and here's the code used for getting records from the DB (stripped of all the unnecessary parts): CODESNIPPET_JAVA2 .. details
      • The problem seems to be the same that happens when hibernate proxied objects are serialized but I don't know how and if I can use the Jackson-hibernate- module to solve my issue.. details
      • not a solution still same error.. details
      • The query is set-up to order it properly it just needs to be merged at the same index level.. details
      • i got the same error, but with no relation to Hibernate.. details
      • For that reason you get this exception.. details
      • It might not be practical to create an API to expose the individual properties.. details
      • Project Creation Create a directory for your source, let's use CODETERM5 On the command line again, navigate to that directory and execute: CODESNIPPET_JAVA2 .. details
      • Is there a better way to decouple these without subjecting yourself to tedious translation/conversion classes?. details
    9. json: 14
      • Im trying to convert a collection (obtained from Hibernate) to json string using Gson for use in my restful service.But, the service is giving me http 500 error.. details
      • What I want to do is store an arbitrary JSON object that I don't know the structure of and still be able to get decent select speed.. details
      • It seems that when Spring used Jackson to serialize one of my hibernate entities into it's JSON version, hibernate was trying to lazy load one of that entity's properties, but since the entity was outside of its transaction at that point (being "in" the controller), it caused an exception, which just got swallowed up.. details
      • Now with the code base is grown and every time I have to set null to the troublesome variables everywhere in the code to avoid json serializing problem.. details
      • A better way to avoid hibernate lazy init exception when serializing in to a json response.. details
      • I am relatively new to jackson and am trying to import json into mysql through hibernate 3.3 and vice verse and having problem about jackson-module-hibernate From its github site: ObjectMapper mapper new ObjectMapper();mapper.registerModule(new HibernateModule()); and I think I need to change it to : mapper.registerModule(new Hibernate4Module()); However, there is a type mismatch : mapper.registerModule expects org.codehaus.jackson.map.Module interface,but the Hibernate4Module extends com.fasterxml.jackson.databind.Module.. details
      • I'm doing this a lot of time using hibernate and then converting the object of collections into json using URL_http://flexjson.sourceforge.net/ [flexjson] .. details
      • ones that use format being validated (XML Schema and JSON Schema both have this basic flaw).Doing this makes code more modular, reusable, and separates concerns (serialization, data validation).. details
      • Adding layers between the two (such as manually handling data binding) can help but is more work.This is not unique to JSON (XML data binding with libs like JAXB has similar challenges), or even data formats: Hibernate and other ORM libs can also add more close-coupling.Another potential challenge is that of losing visibility into what is happening: data binding is often a black box, and when things work, that's great (fewer things to worry about), but when they don't trouble-shooting may be more difficult.. details
      • Or, should I track down the problem fields in the entity object/form that are causing the json conversion to fail , this will be time-consuming and dull, but the end result seems to me to be neater.. details
      • Secondly, the object it is bound to is quite a complex hibernate entity object and I am experiencing problems converting the json to an instance of the object - it has references to other objects etc etc, well actually I am not sure what the exact problems are as the error message is not particularly clear: Content type 'application/json' not supported**.. details
      • Those changes will allow Maven to find the latest URL_http://in.relation.to/Bloggers/Hibernate361FinalRelease [Hibernate] and URL_http://www.springsource.org/documentation [Spring] libraries which are not always present in the default Maven repositories and also other libraries like the URL_http://hsqldb.org/ [HSQLDB] - an in-memory database used to test this example and JSON Java conversion.. details
      • but i get this exception when trying to convert to json string: CODESNIPPET_JAVA2 .. details
      • I am writing a serializer to serialize POJO to JSON but stuck in circular reference problem.. details
    10. collections: 1
      • Unfortunately I seem to be having a lot of issues with collections embedded in my JSONs.. details
    11. file: 1
      • I had also added lazy="no-proxy" in hbm file but to no avail CODESNIPPET_JAVA5 .. details
    12. time: 1
      • Hibernate can spend a lot of time doing dirty checking on flush if your session is huge.. details
    13. interface: 1
      • However, this always bothered me because it throughly ties your interface and messages with the structure and design of your data model.. details
    14. data: 1
      • I am having a problem converting data to json.. details
    15. class: 1
      • I got scared here from all frightening suggestions, which i guess relevant in case of Hibernate and lazy loading...However, in my case i got the error since in an inner class i had no getters/setters, so the BeanSerializer could not serialize the data.... details
    16. jersey: 1
      • I trying to learn how to write RESTful apps in Java using Jersey andHibernate, and I'm struggling to understand how to handle parent/child typerelationships when POSTing data to a Resource.. details
    17. browser: 1
      • The browser may hang too(from my experience).. details