Question when using JCouchDB java binding

[Dave Bordoley <bo...@gmail.com>]

I'm having an issue using the JCouchDB binding (I hope this is an
appropriate list to ask this question???). In CouchDB I'm storing a
simple nested object like the following:

{
  "var1": {

  }
}

In my Java Code I'd like to map the object contained in var1 to a
specific POJO class in my outer POJO. For instance:

public class innerClass {
  .
  Getters/Setters
  .
}

public class myClass {

  public setVar1(InnerClass obj) {
     ...
  }
}

Unfortunately no matter what I try I can't seem to get this to work. I
keep receiving the following exception the Svenson JSON library, and
from a cursory look at the code, I'm wondering if this is even
supported.

org.svenson.JSONParseException: Cannot set property media on class
contentstore.dao.MediaEntry
	at org.svenson.JSONParser.parseObjectInto(JSONParser.java:357)
	at org.svenson.JSONParser.parseObjectInto(JSONParser.java:389)
	at org.svenson.JSONParser.parseArrayInto(JSONParser.java:283)
	at org.svenson.JSONParser.parseObjectInto(JSONParser.java:399)
	at org.svenson.JSONParser.parse(JSONParser.java:185)
	at org.jcouchdb.db.Response.getContentAsBean(Response.java:129)
	at org.jcouchdb.db.Database.queryViewInternal(Database.java:505)
	at org.jcouchdb.db.Database.queryView(Database.java:365)

Any suggestions, I've tried annotated type hints, using a JSONParser,
all to no avail. Am I missing something?

Thanks for any help you can provide.

Dave

Re: Question when using JCouchDB java binding

[Sven Helmberger <sv...@gmx.de>]

Dave Bordoley wrote:
> I'm having an issue using the JCouchDB binding (I hope this is an
> appropriate list to ask this question???). In CouchDB I'm storing a
> simple nested object like the following:
> 
> {
>   "var1": {
> 
>   }
> }
> 
> In my Java Code I'd like to map the object contained in var1 to a
> specific POJO class in my outer POJO. For instance:
> 
> public class innerClass {
>   .
>   Getters/Setters
>   .
> }
> 
> public class myClass {
> 
>   public setVar1(InnerClass obj) {
>      ...
>   }
> }
> 
> Unfortunately no matter what I try I can't seem to get this to work. I
> keep receiving the following exception the Svenson JSON library, and
> from a cursory look at the code, I'm wondering if this is even
> supported.
> 
> org.svenson.JSONParseException: Cannot set property media on class
> contentstore.dao.MediaEntry
> 	at org.svenson.JSONParser.parseObjectInto(JSONParser.java:357)
> 	at org.svenson.JSONParser.parseObjectInto(JSONParser.java:389)
> 	at org.svenson.JSONParser.parseArrayInto(JSONParser.java:283)
> 	at org.svenson.JSONParser.parseObjectInto(JSONParser.java:399)
> 	at org.svenson.JSONParser.parse(JSONParser.java:185)contentstore.dao.
> 	at org.jcouchdb.db.Response.getContentAsBean(Response.java:129)
> 	at org.jcouchdb.db.Database.queryViewInternal(Database.java:505)
> 	at org.jcouchdb.db.Database.queryView(Database.java:365)
> 
> Any suggestions, I've tried annotated type hints, using a JSONParser,
> all to no avail. Am I missing something?
> 
> Thanks for any help you can provide.
> 
> Dave

The error sounds like your class contentstore.dao.MediaEntry is not 
compatible to the data you try to feed to it. Like it says it tries to 
set a property named "media" on this class which for some reason doesn't 
work. (wrong name? property doesn't exist?)

MediaEntry needs to either:
  - declare a writeable property "media"
  - use @JSONProperty to map another property to "media"
  - extends AbstractDynamicProperties which would enable it to receive 
any property

Regards,
Sven Helmberger