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Class Cast Exception - from GraphBackedEntityIterableWrapp er to my class
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Chris  
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 More options Apr 25 2012, 11:50 am
From: Chris <chrisb.business.em...@gmail.com>
Date: Wed, 25 Apr 2012 08:50:33 -0700 (PDT)
Local: Wed, Apr 25 2012 11:50 am
Subject: Class Cast Exception - from GraphBackedEntityIterableWrapper to my class
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I'm using Spring Data Neo4j 2.0.1.release and my unit test creates a
relationship between two of instances of my class Resource.  The
ResourceRelationship class only has the start and end node and in my
Resource class I store all the relationships like so
@RelatedToVia
Collection<ResourceRelationship> relations;

// and the method to get the relationships
public Collection<ResourceRelationship> getResourceRelationships()
{
    return IteratorUtil.asCollection(relations);

}

Creating the relationships works and before the return executes I can see
relations is not empty.  In my unit test the error is thrown when i call
rr.getInterator().next()
Resource found = resourceRepository.findByName("TestResource"); // this
finds the correct resource
Collection<ResourceRelationship> rr = found.getResourceRelationships(); //
collection is not empty
// i tried looping here but will still throw error
ResourceRelationship resR = rr.getIterator().next(); // throws class cast
exception error

When I step thru in debug I can see the target class is my
ResourceRelationship class but when I continue stepping in I eventually hit
a source not found and can't debug any further. test fails with this stack
trace

java.lang.ClassCastException:
org.springframework.data.neo4j.fieldaccess.GraphBackedEntityIterableWrapper
cannot be cast to jackal.mytest.domain.ResourceRelationship
    at
jackal.mytest.domain.DomainTest.resourcesCanBeLinked(DomainTest.java:59)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:5 7)
    at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImp l.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod .java:44)
    at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable. java:15)
    at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.j ava:41)
    at
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.ja va:20)
    at
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:2 8)
    at
org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallb acks.evaluate(RunBeforeTestMethodCallbacks.java:74)
    at
org.springframework.test.context.junit4.statements.RunAfterTestMethodCallba cks.evaluate(RunAfterTestMethodCallbacks.java:82)
    at
org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(Sp ringRepeat.java:72)
    at
org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(Sp ringJUnit4ClassRunner.java:231)
    at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.ja va:49)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
    at
org.springframework.test.context.junit4.statements.RunBeforeTestClassCallba cks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at
org.springframework.test.context.junit4.statements.RunAfterTestClassCallbac ks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
    at
org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJ Unit4ClassRunner.java:174)
    at
org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestRe ference.java:50)
    at
org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java: 38)
    at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestR unner.java:467)
    at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestR unner.java:683)
    at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner .java:390)
    at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunne r.java:197)

Thank you for any guidance!


 
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Michael Hunger  
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 More options Apr 25 2012, 12:01 pm
From: Michael Hunger <michael.hun...@neopersistence.com>
Date: Wed, 25 Apr 2012 18:01:12 +0200
Local: Wed, Apr 25 2012 12:01 pm
Subject: Re: [Neo4j] Class Cast Exception - from GraphBackedEntityIterableWrapper to my class
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Chris could you perhaps share the project with me to investigate?

Michael

Sent from mobile device

Am 25.04.2012 um 17:50 schrieb Chris <chrisb.business.em...@gmail.com>:


 
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Chris  
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 More options Apr 25 2012, 1:58 pm
From: Chris <chrisb.business.em...@gmail.com>
Date: Wed, 25 Apr 2012 10:58:13 -0700 (PDT)
Local: Wed, Apr 25 2012 1:58 pm
Subject: Re: [Neo4j] Class Cast Exception - from GraphBackedEntityIterableWrapper to my class
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Turns out I was missing an elementClass = classtype in my annotation.
problem solved.


 
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Michael Hunger  
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 More options Apr 25 2012, 2:06 pm
From: Michael Hunger <michael.hun...@neotechnology.com>
Date: Wed, 25 Apr 2012 20:06:30 +0200
Local: Wed, Apr 25 2012 2:06 pm
Subject: Re: [Neo4j] Class Cast Exception - from GraphBackedEntityIterableWrapper to my class
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great that you figured it out.

Cheers

Michael

Am 25.04.2012 um 19:58 schrieb Chris:


 
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