problem marshalling JPA beans

Fri, 12 Sep 2008 11:09:31 -0700

I am having an issue where I have a one to many relationship between to tables. JPA tool creates two clases with one to many relationship. The problem is, when JSONRPC tries to send the data to the client, it throws the following exception. Is there anyway to avoid this problem? 


{"error":{"code": 
490,"msg":"org.apache.tuscany.sca.databinding.TransformationException:  
com.metaparadigm.jsonrpc.MarshallException: bean  
org.apache.openjpa.enhance.org$tnc$rbsf$jpa$Report$pcsubclass bean  
org.apache.openjpa.enhance.org$tnc$rbsf$jpa$Project$pcsubclass bean  
org.apache.openjpa.enhance.org$tnc$rbsf$jpa$Basin$pcsubclass bean  
org.apache.openjpa.enhance.org$tnc$rbsf$jpa$Basin$pcsubclass circular  
reference 
","trace":"org.apache.tuscany.sca.databinding.TransformationException:  
org.apache.tuscany.sca.databinding.TransformationException:  
com.metaparadigm.jsonrpc.MarshallException: bean  
org.apache.openjpa.enhance.org$tnc$rbsf$jpa$Report$pcsubclass bean  
org.apache.openjpa.enhance.org$tnc$rbsf$jpa$Project$pcsubclass bean  
org.apache.openjpa.enhance.org$tnc$rbsf$jpa$Basin$pcsubclass bean  
org.apache.openjpa.enhance.org$tnc$rbsf$jpa$Basin$pcsubclass circular  
reference\n\tat  
org 
.apache 
.tuscany 
.sca 
.core 
.databinding 
.transformers 
.Output2OutputTransformer.transform(Output2OutputTransformer.java: 
250)\n\tat  
org 
.apache 
.tuscany.sca.databinding.impl.MediatorImpl.mediate(MediatorImpl.java: 
81)\n\tat  
org 
.apache 
.tuscany 
.sca 
.core 
.databinding 
.wire 
.DataTransformationInterceptor 
.transform(DataTransformationInterceptor.java:186)\n\tat  
org 
.apache 
.tuscany 
.sca 
.core 
.databinding 
.wire 
.DataTransformationInterceptor 
.invoke(DataTransformationInterceptor.java:169)\n\tat  
org 
.apache 
.tuscany 
.sca.core.invocation.RuntimeWireInvoker.invoke(RuntimeWireInvoker.java: 
110)\n\tat  
org 
.apache 
.tuscany 
.sca.core.invocation.RuntimeWireInvoker.invoke(RuntimeWireInvoker.java: 
85)\n\tat  
org 
.apache 
.tuscany 
.sca.core.invocation.RuntimeWireInvoker.invoke(RuntimeWireInvoker.java: 
79)\n\tat  
org 
.apache 
.tuscany.sca.core.assembly.RuntimeWireImpl.invoke(RuntimeWireImpl.java: 
134)\n\tat  
org 
.apache 
.tuscany 
.sca 
.binding 
.jsonrpc 
.provider 
.JSONRPCServiceServlet 
.handleJSONRPCMethodInvocation(JSONRPCServiceServlet.java:238)\n\tat  
org 
.apache 
.tuscany 
.sca 
.binding 
.jsonrpc 
.provider 
.JSONRPCServiceServlet.handleServiceRequest(JSONRPCServiceServlet.java: 
150)\n\tat  
org 
.apache 
.tuscany 
.sca 
.binding 
.jsonrpc 
.provider.JSONRPCServiceServlet.service(JSONRPCServiceServlet.java: 
92)\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java: 
820)\n\tat  
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java: 
487)\n\tat  
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java: 
362)\n\tat  
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java: 
181)\n\tat  
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java: 
726)\n\tat  
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java: 
139)\n\tat org.mortbay.jetty.Server.handle(Server.java:324)\n\tat  
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java: 
505)\n\tat org.mortbay.jetty.HttpConnection 
$RequestHandler.content(HttpConnection.java:842)\n\tat  
org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:648)\n\tat  
org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)\n\tat  
org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)\n\tat  
org 
.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java: 
395)\n\tat  
org.apache.tuscany.sca.core.work.Jsr237Work.run(Jsr237Work.java:63)\n 
\tat org.apache.tuscany.sca.core.work.ThreadPoolWorkManager 
$DecoratingWork.run(ThreadPoolWorkManager.java:221)\n\tat  
java.util.concurrent.ThreadPoolExecutor 
$Worker.runTask(ThreadPoolExecutor.java:650)\n\tat  
java.util.concurrent.ThreadPoolExecutor 
$Worker.run(ThreadPoolExecutor.java:675)\n\tat  
java.lang.Thread.run(Thread.java:613)\nCaused by:  
org.apache.tuscany.sca.databinding.TransformationException:  
com.metaparadigm.jsonrpc.MarshallException: bean  
org.apache.openjpa.enhance.org$tnc$rbsf$jpa$Report$pcsubclass bean  
org.apache.openjpa.enhance.org$tnc$rbsf$jpa$Project$pcsubclass bean  
org.apache.openjpa.enhance.org$tnc$rbsf$jpa$Basin$pcsubclass bean  
org.apache.openjpa.enhance.org$tnc$rbsf$jpa$Basin$pcsubclass circular  
reference\n\tat  
org 
.apache 
.tuscany 
.sca.databinding.json.JavaBean2JSON.transform(JavaBean2JSON.java:78)\n 
\tat  
org.apache.tuscany.sca.databinding.DefaultTransformerExtensionPoint 
$LazyPullTransformer.transform(DefaultTransformerExtensionPoint.java: 
199)\n\tat  
org 
.apache 
.tuscany.sca.databinding.impl.MediatorImpl.mediate(MediatorImpl.java: 
81)\n\tat  
org 
.apache 
.tuscany 
.sca 
.core 
.databinding 
.transformers 
.Output2OutputTransformer.transform(Output2OutputTransformer.java: 
246)\n\t... 28 more\nCaused by:  
com.metaparadigm.jsonrpc.MarshallException: bean  
org.apache.openjpa.enhance.org$tnc$rbsf$jpa$Report$pcsubclass bean  
org.apache.openjpa.enhance.org$tnc$rbsf$jpa$Project$pcsubclass bean  
org.apache.openjpa.enhance.org$tnc$rbsf$jpa$Basin$pcsubclass bean  
org.apache.openjpa.enhance.org$tnc$rbsf$jpa$Basin$pcsubclass circular  
reference\n\tat  
com.metaparadigm.jsonrpc.BeanSerializer.marshall(BeanSerializer.java: 
267)\n\tat  
com.metaparadigm.jsonrpc.JSONSerializer.marshall(JSONSerializer.java: 
250)\n\tat  
com.metaparadigm.jsonrpc.ArraySerializer.marshall(ArraySerializer.java: 
169)\n\tat  
com.metaparadigm.jsonrpc.JSONSerializer.marshall(JSONSerializer.java: 
250)\n\tat  
org 
.apache 
.tuscany.sca.databinding.json.JavaBean2JSON.toJSON(JavaBean2JSON.java: 
71)\n\tat  
org 
.apache 
.tuscany 
.sca.databinding.json.JavaBean2JSON.transform(JavaBean2JSON.java:76)\n 
\t... 31 more\n"},"id":1}


these are the classes that seem to throw the circular exception.




Attachment:
Project.java

Description: Binary data



Attachment:
Report.java

Description: Binary data






















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