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Posted to dev@tuscany.apache.org by Jean-Sebastien Delfino <js...@apache.org> on 2007/11/12 17:39:02 UTC
DataBinding issues - ClassCastException
I'm trying to add some support for business objects to the Tutorial
(instead of just flowing the catalog and cart items as strings).
My business objects are simple JavaBeans with an empty constructor. I
need to flow them as Java objects through local service calls, XML (in
Atom payloads) and JSON.
It should have been a simple exercise, but I've been running into a
number of issues with the DataBinding framework. Here they are:
1. Some of the Bean2* and *2Bean transformers were missing to
META-INF/services I added them.
2. The Databinding framework was not finding the transformers in XML <->
registrations. I changed all instances of java.lang.String to xml.string
in the registrations of the *2String and String2* transformer to fix that.
3. Next I ran into a ClassCastException in XML2JavaBeanTransformer at
public Object transform(T source, TransformationContext context) {
- -> XMLType xmlType = (XMLType)
context.getSourceDataType().getLogical();
as the logical type was Class instead of XMLType
4. I had to add "implements Serializable" to my business object class as
it looks like we are using Java serialization to enforce pass by value
in local service calls. I don't think it's right as we are not using
Java serialization to pass the same business object through a remote
call. We should change to use the same XML transformation to enforce
pass by value with local calls as well, and not require the business
objects to be Serializable.
5. After changes (1), (2), (3) and (4) I am now running into a build issue:
testTransform1(org.apache.tuscany.sca.databinding.impl.MediatorImplTestCase)
Time elapsed: 0.02 sec <<< ERROR!
java.lang.ClassCastException:
org.apache.tuscany.sca.databinding.DefaultTransformerExtensionPoint$LazyPullTransformer
cannot be cast to org.apache.tuscany.sca.databinding.DataPipeTransformer
at
org.apache.tuscany.sca.databinding.impl.MediatorImpl.mediate(MediatorImpl.java:75)
at
org.apache.tuscany.sca.databinding.impl.MediatorImplTestCase.testTransform1(MediatorImplTestCase.java:104)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at junit.framework.TestCase.runTest(TestCase.java:168)
at junit.framework.TestCase.runBare(TestCase.java:134)
at junit.framework.TestResult$1.protect(TestResult.java:110)
at junit.framework.TestResult.runProtected(TestResult.java:128)
at junit.framework.TestResult.run(TestResult.java:113)
at junit.framework.TestCase.run(TestCase.java:124)
at junit.framework.TestSuite.runTest(TestSuite.java:232)
at junit.framework.TestSuite.run(TestSuite.java:227)
at
org.junit.internal.runners.OldTestClassRunner.run(OldTestClassRunner.java:35)
at
org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:62)
at
org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:138)
at
org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:125)
at org.apache.maven.surefire.Surefire.run(Surefire.java:132)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:299)
at
org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:837)
I'm getting to the end of the rope here... does anyone know what can
cause error (5)?
Thanks
--
Jean-Sebastien
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Updated tutorial, was: DataBinding issues - ClassCastException
Posted by Jean-Sebastien Delfino <js...@apache.org>.
[snip]
Jean-Sebastien Delfino wrote:
> Jean-Sebastien Delfino wrote:
>> Jean-Sebastien Delfino wrote:
>>> I'm trying to add some support for business objects to the Tutorial
>>> (instead of just flowing the catalog and cart items as strings).
>>>
>>> My business objects are simple JavaBeans with an empty constructor.
>>> I need to flow them as Java objects through local service calls, XML
>>> (in Atom payloads) and JSON.
>>>
>>> It should have been a simple exercise, but I've been running into a
>>> number of issues with the DataBinding framework. Here they are:
>>>
OK, I've been able to fix or workaround the issues I described earlier.
An update of the tutorial using business objects (see class Item in the
assets module) is now available in SVN.
I also put under tutorial a Tutorial.pdf that shows the steps in the
construction of the tutorial application.
After what I've been through trying to get my little Item object
converted to XML and JSON I'm going to do a little bit of thinking and
I'll post some suggestions later to try to simplify the whole
databinding story.
--
Jean-Sebastien
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Re: DataBinding issues - ClassCastException
Posted by Raymond Feng <en...@gmail.com>.
OK. I found the problem. I am testing the fix now and will check it in as
soon as the full build passes.
Thanks,
Raymond
----- Original Message -----
From: "Jean-Sebastien Delfino" <js...@apache.org>
To: <tu...@ws.apache.org>
Sent: Tuesday, November 13, 2007 10:09 AM
Subject: Re: DataBinding issues - ClassCastException
> Raymond Feng wrote:
>> What problem did you see with JavaBean2XMLStreamReader? How to reproduce
>> the problem? I can take a quick look.
>
> Great. Add that line to
> databinding/src/main/resources/META-INF/services/org.apache.tuscany.sca.databinding.PullTransformer:
> org.apache.tuscany.sca.databinding.javabeans.JavaBean2XMLStreamReader;source=java:complexType,target=javax.xml.stream.XMLStreamReader,weight=79000
>
> Build the databinding module. You should get the exception at the bottom
> of that email.
>
> Thanks.
>
>>
>> Thanks,
>> Raymond
>>
>> ----- Original Message ----- From: "Jean-Sebastien Delfino"
>> <js...@apache.org>
>> To: <tu...@ws.apache.org>
>> Sent: Monday, November 12, 2007 12:05 PM
>> Subject: Re: DataBinding issues - ClassCastException
>>
>>
>>> Jean-Sebastien Delfino wrote:
>>>> Jean-Sebastien Delfino wrote:
>>>>> I'm trying to add some support for business objects to the Tutorial
>>>>> (instead of just flowing the catalog and cart items as strings).
>>>>>
>>>>> My business objects are simple JavaBeans with an empty constructor. I
>>>>> need to flow them as Java objects through local service calls, XML (in
>>>>> Atom payloads) and JSON.
>>>>>
>>>>> It should have been a simple exercise, but I've been running into a
>>>>> number of issues with the DataBinding framework. Here they are:
>>>>>
>>>>> 1. Some of the Bean2* and *2Bean transformers were missing to
>>>>> META-INF/services I added them.
>>>>>
>>>>> 2. The Databinding framework was not finding the transformers in XML
>>>>> <-> registrations. I changed all instances of java.lang.String to
>>>>> xml.string in the registrations of the *2String and String2*
>>>>> transformer to fix that.
>>>>>
>>>>> 3. Next I ran into a ClassCastException in XML2JavaBeanTransformer at
>>>>> public Object transform(T source, TransformationContext context) {
>>>>> - -> XMLType xmlType = (XMLType)
>>>>> context.getSourceDataType().getLogical();
>>>>> as the logical type was Class instead of XMLType
>>>>>
>>>>> 4. I had to add "implements Serializable" to my business object class
>>>>> as it looks like we are using Java serialization to enforce pass by
>>>>> value in local service calls. I don't think it's right as we are not
>>>>> using Java serialization to pass the same business object through a
>>>>> remote call. We should change to use the same XML transformation to
>>>>> enforce pass by value with local calls as well, and not require the
>>>>> business objects to be Serializable.
>>>>>
>>>>> 5. After changes (1), (2), (3) and (4) I am now running into a build
>>>>> issue:
>>>>> testTransform1(org.apache.tuscany.sca.databinding.impl.MediatorImplTestCase)
>>>>> Time elapsed: 0.02 sec <<< ERROR!
>>>>> java.lang.ClassCastException:
>>>>> org.apache.tuscany.sca.databinding.DefaultTransformerExtensionPoint$LazyPullTransformer
>>>>> cannot be cast to
>>>>> org.apache.tuscany.sca.databinding.DataPipeTransformer
>>>>> at
>>>>> org.apache.tuscany.sca.databinding.impl.MediatorImpl.mediate(MediatorImpl.java:75)
>>>>> at
>>>>> org.apache.tuscany.sca.databinding.impl.MediatorImplTestCase.testTransform1(MediatorImplTestCase.java:104)
>>>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>>> at
>>>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>>>> at
>>>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>>>> at java.lang.reflect.Method.invoke(Method.java:597)
>>>>> at junit.framework.TestCase.runTest(TestCase.java:168)
>>>>> at junit.framework.TestCase.runBare(TestCase.java:134)
>>>>> at junit.framework.TestResult$1.protect(TestResult.java:110)
>>>>> at junit.framework.TestResult.runProtected(TestResult.java:128)
>>>>> at junit.framework.TestResult.run(TestResult.java:113)
>>>>> at junit.framework.TestCase.run(TestCase.java:124)
>>>>> at junit.framework.TestSuite.runTest(TestSuite.java:232)
>>>>> at junit.framework.TestSuite.run(TestSuite.java:227)
>>>>> at
>>>>> org.junit.internal.runners.OldTestClassRunner.run(OldTestClassRunner.java:35)
>>>>> at
>>>>> org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:62)
>>>>> at
>>>>> org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:138)
>>>>> at
>>>>> org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:125)
>>>>> at org.apache.maven.surefire.Surefire.run(Surefire.java:132)
>>>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>>> at
>>>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>>>> at
>>>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>>>> at java.lang.reflect.Method.invoke(Method.java:597)
>>>>> at
>>>>> org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:299)
>>>>> at
>>>>> org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:837)
>>>>>
>>>>> I'm getting to the end of the rope here... does anyone know what can
>>>>> cause error (5)?
>>>>>
>>>>> Thanks
>>>>>
>>>>
>>>> A little more info:
>>>>
>>>> The ClassCastException is on:
>>>> } else if (transformer instanceof PushTransformer) {
>>>> DataPipeTransformer dataPipeFactory = (i < size - 1) ?
>>>> (DataPipeTransformer)path.get(++i) : null;
>>>>
>>>> path =
>>>> [org.apache.tuscany.sca.databinding.xml.String2SAX@15a6029,
>>>> org.apache.tuscany.sca.databinding.DefaultTransformerExtensionPoint$LazyPullTransformer@5f6303;className=org.apache.tuscany.sca.databinding.xml.SAX2DOMPipe]
>>>>
>>>> sourceDataType = class java.lang.String java.lang.String class
>>>> java.lang.String
>>>> targetDataType = interface org.w3c.dom.Node org.w3c.dom.Node interface
>>>> org.w3c.dom.Node
>>>>
>>>
>>> Next stop on the road to databinding happiness: Revert changes (2) as
>>> registering the transformers with xml.string seems to confuse all the
>>> code that uses java.lang.String instead of xml.string as databinding
>>> name or id.
>>>
>>> I then get the following exception:
>>> Running
>>> org.apache.tuscany.sca.binding.ws.axis2.itests.HelloWorldNoWSDLTestCase
>>> info: Added Servlet mapping:
>>> http://delfinoj60.burlingame.ibm.com:8085/helloWorld
>>> info: Added Servlet mapping:
>>> http://delfinoj60.burlingame.ibm.com:8085/Echo
>>> info: Added Servlet mapping:
>>> http://delfinoj60.burlingame.ibm.com:8085/helloWorld
>>> info: Added Servlet mapping:
>>> http://delfinoj60.burlingame.ibm.com:8085/Echo
>>> severe:
>>> org.apache.tuscany.sca.databinding.javabeans.XML2JavaMapperException:
>>> java.lang.NullPointerException <bars> in <class
>>> org.apache.tuscany.sca.binding.ws.axis2.itests.Foo>
>>> org.osoa.sca.ServiceRuntimeException:
>>> org.apache.tuscany.sca.databinding.javabeans.XML2JavaMapperException:
>>> java.lang.NullPointerException <bars> in <class
>>> org.apache.tuscany.sca.binding.ws.axis2.itests.Foo>
>>> at
>>> org.apache.tuscany.sca.core.invocation.RuntimeWireInvoker.invoke(RuntimeWireInvoker.java:127)
>>> at
>>> org.apache.tuscany.sca.core.invocation.RuntimeWireInvoker.invoke(RuntimeWireInvoker.java:89)
>>> at
>>> org.apache.tuscany.sca.core.invocation.RuntimeWireInvoker.invoke(RuntimeWireInvoker.java:83)
>>> at
>>> org.apache.tuscany.sca.core.assembly.RuntimeWireImpl.invoke(RuntimeWireImpl.java:127)
>>> at
>>> org.apache.tuscany.sca.binding.ws.axis2.Axis2ServiceProvider.invokeTarget(Axis2ServiceProvider.java:567)
>>> at
>>> org.apache.tuscany.sca.binding.ws.axis2.Axis2ServiceInOutSyncMessageReceiver.invokeBusinessLogic(Axis2ServiceInOutSyncMessageReceiver.java:59)
>>> at
>>> org.apache.axis2.receivers.AbstractInOutSyncMessageReceiver.invokeBusinessLogic(AbstractInOutSyncMessageReceiver.java:42)
>>> at
>>> org.apache.axis2.receivers.AbstractMessageReceiver.receive(AbstractMessageReceiver.java:96)
>>> at
>>> org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:145)
>>> at
>>> org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:275)
>>> at
>>> org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:120)
>>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
>>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
>>> at
>>> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
>>> at
>>> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:367)
>>> at
>>> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
>>> at
>>> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712)
>>> at
>>> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
>>> at org.mortbay.jetty.Server.handle(Server.java:285)
>>> at
>>> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:502)
>>> at
>>> org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:835)
>>> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:641)
>>> at
>>> org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:208)
>>> at
>>> org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:378)
>>> at
>>> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:368)
>>> at
>>> org.apache.tuscany.sca.core.work.Jsr237Work.run(Jsr237Work.java:61)
>>> at
>>> org.apache.tuscany.sca.core.work.ThreadPoolWorkManager$DecoratingWork.run(ThreadPoolWorkManager.java:205)
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
>>> at java.lang.Thread.run(Thread.java:619)
>>> Caused by:
>>> org.apache.tuscany.sca.databinding.javabeans.XML2JavaMapperException:
>>> java.lang.NullPointerException <bars> in <class
>>> org.apache.tuscany.sca.binding.ws.axis2.itests.Foo>
>>> at
>>> org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.createJavaObject(XML2JavaBeanTransformer.java:110)
>>> at
>>> org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.toJavaObject(XML2JavaBeanTransformer.java:67)
>>> at
>>> org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.transform(XML2JavaBeanTransformer.java:59)
>>> at
>>> org.apache.tuscany.sca.databinding.DefaultTransformerExtensionPoint$LazyPullTransformer.transform(DefaultTransformerExtensionPoint.java:194)
>>> at
>>> org.apache.tuscany.sca.databinding.impl.MediatorImpl.mediate(MediatorImpl.java:73)
>>> at
>>> org.apache.tuscany.sca.core.databinding.transformers.Input2InputTransformer.transform(Input2InputTransformer.java:177)
>>> at
>>> org.apache.tuscany.sca.core.databinding.transformers.Input2InputTransformer.transform(Input2InputTransformer.java:43)
>>> at
>>> org.apache.tuscany.sca.databinding.impl.MediatorImpl.mediate(MediatorImpl.java:73)
>>> at
>>> org.apache.tuscany.sca.core.databinding.wire.DataTransformationInterceptor.transform(DataTransformationInterceptor.java:175)
>>> at
>>> org.apache.tuscany.sca.core.databinding.wire.DataTransformationInterceptor.invoke(DataTransformationInterceptor.java:72)
>>> at
>>> org.apache.tuscany.sca.core.invocation.RuntimeWireInvoker.invoke(RuntimeWireInvoker.java:118)
>>> ... 29 more
>>> Caused by: java.lang.NullPointerException
>>> at
>>> org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.createJavaObject(XML2JavaBeanTransformer.java:76)
>>> at
>>> org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.setFieldValueUsingSetter(XML2JavaBeanTransformer.java:164)
>>> at
>>> org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.createJavaObject(XML2JavaBeanTransformer.java:97)
>>> ... 39 more
>>> Tests run: 2, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 15.143
>>> sec <<< FAILURE!
>>> testEchoFoo(org.apache.tuscany.sca.binding.ws.axis2.itests.HelloWorldNoWSDLTestCase)
>>> Time elapsed: 1.218 sec <<< ERROR!
>>> java.lang.reflect.UndeclaredThrowableException
>>> at $Proxy7.echoFoo(Unknown Source)
>>> at
>>> org.apache.tuscany.sca.binding.ws.axis2.itests.EchoComponent.echoFoo(EchoComponent.java:30)
>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>> at
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>> at
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>> at java.lang.reflect.Method.invoke(Method.java:597)
>>> at
>>> org.apache.tuscany.sca.implementation.java.invocation.JavaImplementationInvoker.invoke(JavaImplementationInvoker.java:105)
>>> at
>>> org.apache.tuscany.sca.core.databinding.wire.PassByValueInterceptor.invoke(PassByValueInterceptor.java:49)
>>> at
>>> org.apache.tuscany.sca.core.invocation.JDKInvocationHandler.invoke(JDKInvocationHandler.java:233)
>>> at
>>> org.apache.tuscany.sca.core.invocation.JDKInvocationHandler.invoke(JDKInvocationHandler.java:130)
>>> at $Proxy7.echoFoo(Unknown Source)
>>> at
>>> org.apache.tuscany.sca.binding.ws.axis2.itests.HelloWorldNoWSDLTestCase.testEchoFoo(HelloWorldNoWSDLTestCase.java:54)
>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>> at
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>> at
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>> at java.lang.reflect.Method.invoke(Method.java:597)
>>> at junit.framework.TestCase.runTest(TestCase.java:168)
>>> at junit.framework.TestCase.runBare(TestCase.java:134)
>>> at junit.framework.TestResult$1.protect(TestResult.java:110)
>>> at junit.framework.TestResult.runProtected(TestResult.java:128)
>>> at junit.framework.TestResult.run(TestResult.java:113)
>>> at junit.framework.TestCase.run(TestCase.java:124)
>>> at junit.framework.TestSuite.runTest(TestSuite.java:232)
>>> at junit.framework.TestSuite.run(TestSuite.java:227)
>>> at
>>> org.junit.internal.runners.OldTestClassRunner.run(OldTestClassRunner.java:35)
>>> at
>>> org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:62)
>>> at
>>> org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:138)
>>> at
>>> org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:125)
>>> at org.apache.maven.surefire.Surefire.run(Surefire.java:132)
>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>> at
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>> at
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>> at java.lang.reflect.Method.invoke(Method.java:597)
>>> at
>>> org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:299)
>>> at
>>> org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:837)
>>> Caused by: org.apache.tuscany.sca.interfacedef.util.FaultException:
>>> org.apache.tuscany.sca.databinding.javabeans.XML2JavaMapperException:
>>> java.lang.NullPointerException <bars> in <class
>>> org.apache.tuscany.sca.binding.ws.axis2.itests.Foo>
>>> at
>>> org.apache.tuscany.sca.binding.ws.axis2.Axis2BindingInvoker.invoke(Axis2BindingInvoker.java:79)
>>> at
>>> org.apache.tuscany.sca.core.databinding.wire.DataTransformationInterceptor.invoke(DataTransformationInterceptor.java:74)
>>> at
>>> org.apache.tuscany.sca.core.invocation.JDKInvocationHandler.invoke(JDKInvocationHandler.java:233)
>>> at
>>> org.apache.tuscany.sca.core.invocation.JDKInvocationHandler.invoke(JDKInvocationHandler.java:130)
>>> ... 35 more
>>>
>>> caused by that line in
>>> databinding/src/main/resources/META-INF/services/org.apache.tuscany.sca.databinding.PullTransformer:
>>> org.apache.tuscany.sca.databinding.javabeans.JavaBean2XMLStreamReader;source=java:complexType,target=javax.xml.stream.XMLStreamReader,weight=79000
>>>
>>> I had added that line to use JavaBean2XMLStreamReader instead of
>>> JavaBean2DOMNodeTransformer, as going through a DOM is not the most
>>> optimized path from a JavaBean to XML :) but it looks like
>>> JavaBean2XMLStreamReader does not work as well as
>>> JavaBean2DOMNodeTransformer... After removing it the build is successful
>>> again.
>>>
>>> --
>>> Jean-Sebastien
>>>
>>>
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: tuscany-dev-unsubscribe@ws.apache.org
>>> For additional commands, e-mail: tuscany-dev-help@ws.apache.org
>>>
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: tuscany-dev-unsubscribe@ws.apache.org
>> For additional commands, e-mail: tuscany-dev-help@ws.apache.org
>>
>>
>
>
> --
> Jean-Sebastien
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: tuscany-dev-unsubscribe@ws.apache.org
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>
---------------------------------------------------------------------
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Re: DataBinding issues - ClassCastException
Posted by Jean-Sebastien Delfino <js...@apache.org>.
Raymond Feng wrote:
> What problem did you see with JavaBean2XMLStreamReader? How to
> reproduce the problem? I can take a quick look.
Great. Add that line to
databinding/src/main/resources/META-INF/services/org.apache.tuscany.sca.databinding.PullTransformer:
org.apache.tuscany.sca.databinding.javabeans.JavaBean2XMLStreamReader;source=java:complexType,target=javax.xml.stream.XMLStreamReader,weight=79000
Build the databinding module. You should get the exception at the bottom
of that email.
Thanks.
>
> Thanks,
> Raymond
>
> ----- Original Message ----- From: "Jean-Sebastien Delfino"
> <js...@apache.org>
> To: <tu...@ws.apache.org>
> Sent: Monday, November 12, 2007 12:05 PM
> Subject: Re: DataBinding issues - ClassCastException
>
>
>> Jean-Sebastien Delfino wrote:
>>> Jean-Sebastien Delfino wrote:
>>>> I'm trying to add some support for business objects to the Tutorial
>>>> (instead of just flowing the catalog and cart items as strings).
>>>>
>>>> My business objects are simple JavaBeans with an empty constructor.
>>>> I need to flow them as Java objects through local service calls,
>>>> XML (in Atom payloads) and JSON.
>>>>
>>>> It should have been a simple exercise, but I've been running into a
>>>> number of issues with the DataBinding framework. Here they are:
>>>>
>>>> 1. Some of the Bean2* and *2Bean transformers were missing to
>>>> META-INF/services I added them.
>>>>
>>>> 2. The Databinding framework was not finding the transformers in
>>>> XML <-> registrations. I changed all instances of java.lang.String
>>>> to xml.string in the registrations of the *2String and String2*
>>>> transformer to fix that.
>>>>
>>>> 3. Next I ran into a ClassCastException in XML2JavaBeanTransformer at
>>>> public Object transform(T source, TransformationContext context) {
>>>> - -> XMLType xmlType = (XMLType)
>>>> context.getSourceDataType().getLogical();
>>>> as the logical type was Class instead of XMLType
>>>>
>>>> 4. I had to add "implements Serializable" to my business object
>>>> class as it looks like we are using Java serialization to enforce
>>>> pass by value in local service calls. I don't think it's right as
>>>> we are not using Java serialization to pass the same business
>>>> object through a remote call. We should change to use the same XML
>>>> transformation to enforce pass by value with local calls as well,
>>>> and not require the business objects to be Serializable.
>>>>
>>>> 5. After changes (1), (2), (3) and (4) I am now running into a
>>>> build issue:
>>>> testTransform1(org.apache.tuscany.sca.databinding.impl.MediatorImplTestCase)
>>>> Time elapsed: 0.02 sec <<< ERROR!
>>>> java.lang.ClassCastException:
>>>> org.apache.tuscany.sca.databinding.DefaultTransformerExtensionPoint$LazyPullTransformer
>>>> cannot be cast to
>>>> org.apache.tuscany.sca.databinding.DataPipeTransformer
>>>> at
>>>> org.apache.tuscany.sca.databinding.impl.MediatorImpl.mediate(MediatorImpl.java:75)
>>>>
>>>> at
>>>> org.apache.tuscany.sca.databinding.impl.MediatorImplTestCase.testTransform1(MediatorImplTestCase.java:104)
>>>>
>>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>> at
>>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>>>
>>>> at
>>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>>>
>>>> at java.lang.reflect.Method.invoke(Method.java:597)
>>>> at junit.framework.TestCase.runTest(TestCase.java:168)
>>>> at junit.framework.TestCase.runBare(TestCase.java:134)
>>>> at junit.framework.TestResult$1.protect(TestResult.java:110)
>>>> at junit.framework.TestResult.runProtected(TestResult.java:128)
>>>> at junit.framework.TestResult.run(TestResult.java:113)
>>>> at junit.framework.TestCase.run(TestCase.java:124)
>>>> at junit.framework.TestSuite.runTest(TestSuite.java:232)
>>>> at junit.framework.TestSuite.run(TestSuite.java:227)
>>>> at
>>>> org.junit.internal.runners.OldTestClassRunner.run(OldTestClassRunner.java:35)
>>>>
>>>> at
>>>> org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:62)
>>>>
>>>> at
>>>> org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:138)
>>>>
>>>> at
>>>> org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:125)
>>>>
>>>> at org.apache.maven.surefire.Surefire.run(Surefire.java:132)
>>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>>> at
>>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>>>
>>>> at
>>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>>>
>>>> at java.lang.reflect.Method.invoke(Method.java:597)
>>>> at
>>>> org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:299)
>>>>
>>>> at
>>>> org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:837)
>>>>
>>>>
>>>> I'm getting to the end of the rope here... does anyone know what
>>>> can cause error (5)?
>>>>
>>>> Thanks
>>>>
>>>
>>> A little more info:
>>>
>>> The ClassCastException is on:
>>> } else if (transformer instanceof PushTransformer) {
>>> DataPipeTransformer dataPipeFactory = (i < size - 1)
>>> ? (DataPipeTransformer)path.get(++i) : null;
>>>
>>> path =
>>> [org.apache.tuscany.sca.databinding.xml.String2SAX@15a6029,
>>> org.apache.tuscany.sca.databinding.DefaultTransformerExtensionPoint$LazyPullTransformer@5f6303;className=org.apache.tuscany.sca.databinding.xml.SAX2DOMPipe]
>>>
>>>
>>> sourceDataType = class java.lang.String java.lang.String class
>>> java.lang.String
>>> targetDataType = interface org.w3c.dom.Node org.w3c.dom.Node
>>> interface org.w3c.dom.Node
>>>
>>
>> Next stop on the road to databinding happiness: Revert changes (2)
>> as registering the transformers with xml.string seems to confuse all
>> the code that uses java.lang.String instead of xml.string as
>> databinding name or id.
>>
>> I then get the following exception:
>> Running
>> org.apache.tuscany.sca.binding.ws.axis2.itests.HelloWorldNoWSDLTestCase
>> info: Added Servlet mapping:
>> http://delfinoj60.burlingame.ibm.com:8085/helloWorld
>> info: Added Servlet mapping:
>> http://delfinoj60.burlingame.ibm.com:8085/Echo
>> info: Added Servlet mapping:
>> http://delfinoj60.burlingame.ibm.com:8085/helloWorld
>> info: Added Servlet mapping:
>> http://delfinoj60.burlingame.ibm.com:8085/Echo
>> severe:
>> org.apache.tuscany.sca.databinding.javabeans.XML2JavaMapperException:
>> java.lang.NullPointerException <bars> in <class
>> org.apache.tuscany.sca.binding.ws.axis2.itests.Foo>
>> org.osoa.sca.ServiceRuntimeException:
>> org.apache.tuscany.sca.databinding.javabeans.XML2JavaMapperException:
>> java.lang.NullPointerException <bars> in <class
>> org.apache.tuscany.sca.binding.ws.axis2.itests.Foo>
>> at
>> org.apache.tuscany.sca.core.invocation.RuntimeWireInvoker.invoke(RuntimeWireInvoker.java:127)
>>
>> at
>> org.apache.tuscany.sca.core.invocation.RuntimeWireInvoker.invoke(RuntimeWireInvoker.java:89)
>>
>> at
>> org.apache.tuscany.sca.core.invocation.RuntimeWireInvoker.invoke(RuntimeWireInvoker.java:83)
>>
>> at
>> org.apache.tuscany.sca.core.assembly.RuntimeWireImpl.invoke(RuntimeWireImpl.java:127)
>>
>> at
>> org.apache.tuscany.sca.binding.ws.axis2.Axis2ServiceProvider.invokeTarget(Axis2ServiceProvider.java:567)
>>
>> at
>> org.apache.tuscany.sca.binding.ws.axis2.Axis2ServiceInOutSyncMessageReceiver.invokeBusinessLogic(Axis2ServiceInOutSyncMessageReceiver.java:59)
>>
>> at
>> org.apache.axis2.receivers.AbstractInOutSyncMessageReceiver.invokeBusinessLogic(AbstractInOutSyncMessageReceiver.java:42)
>>
>> at
>> org.apache.axis2.receivers.AbstractMessageReceiver.receive(AbstractMessageReceiver.java:96)
>>
>> at
>> org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:145)
>> at
>> org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:275)
>>
>> at
>> org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:120)
>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
>> at
>> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
>> at
>> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:367)
>> at
>> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
>> at
>> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712)
>> at
>> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
>> at org.mortbay.jetty.Server.handle(Server.java:285)
>> at
>> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:502)
>> at
>> org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:835)
>>
>> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:641)
>> at
>> org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:208)
>> at
>> org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:378)
>> at
>> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:368)
>>
>> at
>> org.apache.tuscany.sca.core.work.Jsr237Work.run(Jsr237Work.java:61)
>> at
>> org.apache.tuscany.sca.core.work.ThreadPoolWorkManager$DecoratingWork.run(ThreadPoolWorkManager.java:205)
>>
>> at
>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
>>
>> at
>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
>>
>> at java.lang.Thread.run(Thread.java:619)
>> Caused by:
>> org.apache.tuscany.sca.databinding.javabeans.XML2JavaMapperException:
>> java.lang.NullPointerException <bars> in <class
>> org.apache.tuscany.sca.binding.ws.axis2.itests.Foo>
>> at
>> org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.createJavaObject(XML2JavaBeanTransformer.java:110)
>>
>> at
>> org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.toJavaObject(XML2JavaBeanTransformer.java:67)
>>
>> at
>> org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.transform(XML2JavaBeanTransformer.java:59)
>>
>> at
>> org.apache.tuscany.sca.databinding.DefaultTransformerExtensionPoint$LazyPullTransformer.transform(DefaultTransformerExtensionPoint.java:194)
>>
>> at
>> org.apache.tuscany.sca.databinding.impl.MediatorImpl.mediate(MediatorImpl.java:73)
>>
>> at
>> org.apache.tuscany.sca.core.databinding.transformers.Input2InputTransformer.transform(Input2InputTransformer.java:177)
>>
>> at
>> org.apache.tuscany.sca.core.databinding.transformers.Input2InputTransformer.transform(Input2InputTransformer.java:43)
>>
>> at
>> org.apache.tuscany.sca.databinding.impl.MediatorImpl.mediate(MediatorImpl.java:73)
>>
>> at
>> org.apache.tuscany.sca.core.databinding.wire.DataTransformationInterceptor.transform(DataTransformationInterceptor.java:175)
>>
>> at
>> org.apache.tuscany.sca.core.databinding.wire.DataTransformationInterceptor.invoke(DataTransformationInterceptor.java:72)
>>
>> at
>> org.apache.tuscany.sca.core.invocation.RuntimeWireInvoker.invoke(RuntimeWireInvoker.java:118)
>>
>> ... 29 more
>> Caused by: java.lang.NullPointerException
>> at
>> org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.createJavaObject(XML2JavaBeanTransformer.java:76)
>>
>> at
>> org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.setFieldValueUsingSetter(XML2JavaBeanTransformer.java:164)
>>
>> at
>> org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.createJavaObject(XML2JavaBeanTransformer.java:97)
>>
>> ... 39 more
>> Tests run: 2, Failures: 0, Errors: 1, Skipped: 0, Time elapsed:
>> 15.143 sec <<< FAILURE!
>> testEchoFoo(org.apache.tuscany.sca.binding.ws.axis2.itests.HelloWorldNoWSDLTestCase)
>> Time elapsed: 1.218 sec <<< ERROR!
>> java.lang.reflect.UndeclaredThrowableException
>> at $Proxy7.echoFoo(Unknown Source)
>> at
>> org.apache.tuscany.sca.binding.ws.axis2.itests.EchoComponent.echoFoo(EchoComponent.java:30)
>>
>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>> at
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>
>> at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>
>> at java.lang.reflect.Method.invoke(Method.java:597)
>> at
>> org.apache.tuscany.sca.implementation.java.invocation.JavaImplementationInvoker.invoke(JavaImplementationInvoker.java:105)
>>
>> at
>> org.apache.tuscany.sca.core.databinding.wire.PassByValueInterceptor.invoke(PassByValueInterceptor.java:49)
>>
>> at
>> org.apache.tuscany.sca.core.invocation.JDKInvocationHandler.invoke(JDKInvocationHandler.java:233)
>>
>> at
>> org.apache.tuscany.sca.core.invocation.JDKInvocationHandler.invoke(JDKInvocationHandler.java:130)
>>
>> at $Proxy7.echoFoo(Unknown Source)
>> at
>> org.apache.tuscany.sca.binding.ws.axis2.itests.HelloWorldNoWSDLTestCase.testEchoFoo(HelloWorldNoWSDLTestCase.java:54)
>>
>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>> at
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>
>> at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>
>> at java.lang.reflect.Method.invoke(Method.java:597)
>> at junit.framework.TestCase.runTest(TestCase.java:168)
>> at junit.framework.TestCase.runBare(TestCase.java:134)
>> at junit.framework.TestResult$1.protect(TestResult.java:110)
>> at junit.framework.TestResult.runProtected(TestResult.java:128)
>> at junit.framework.TestResult.run(TestResult.java:113)
>> at junit.framework.TestCase.run(TestCase.java:124)
>> at junit.framework.TestSuite.runTest(TestSuite.java:232)
>> at junit.framework.TestSuite.run(TestSuite.java:227)
>> at
>> org.junit.internal.runners.OldTestClassRunner.run(OldTestClassRunner.java:35)
>>
>> at
>> org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:62)
>>
>> at
>> org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:138)
>>
>> at
>> org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:125)
>>
>> at org.apache.maven.surefire.Surefire.run(Surefire.java:132)
>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>> at
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>
>> at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>
>> at java.lang.reflect.Method.invoke(Method.java:597)
>> at
>> org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:299)
>>
>> at
>> org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:837)
>>
>> Caused by: org.apache.tuscany.sca.interfacedef.util.FaultException:
>> org.apache.tuscany.sca.databinding.javabeans.XML2JavaMapperException:
>> java.lang.NullPointerException <bars> in <class
>> org.apache.tuscany.sca.binding.ws.axis2.itests.Foo>
>> at
>> org.apache.tuscany.sca.binding.ws.axis2.Axis2BindingInvoker.invoke(Axis2BindingInvoker.java:79)
>>
>> at
>> org.apache.tuscany.sca.core.databinding.wire.DataTransformationInterceptor.invoke(DataTransformationInterceptor.java:74)
>>
>> at
>> org.apache.tuscany.sca.core.invocation.JDKInvocationHandler.invoke(JDKInvocationHandler.java:233)
>>
>> at
>> org.apache.tuscany.sca.core.invocation.JDKInvocationHandler.invoke(JDKInvocationHandler.java:130)
>>
>> ... 35 more
>>
>> caused by that line in
>> databinding/src/main/resources/META-INF/services/org.apache.tuscany.sca.databinding.PullTransformer:
>>
>> org.apache.tuscany.sca.databinding.javabeans.JavaBean2XMLStreamReader;source=java:complexType,target=javax.xml.stream.XMLStreamReader,weight=79000
>>
>>
>> I had added that line to use JavaBean2XMLStreamReader instead of
>> JavaBean2DOMNodeTransformer, as going through a DOM is not the most
>> optimized path from a JavaBean to XML :) but it looks like
>> JavaBean2XMLStreamReader does not work as well as
>> JavaBean2DOMNodeTransformer... After removing it the build is
>> successful again.
>>
>> --
>> Jean-Sebastien
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: tuscany-dev-unsubscribe@ws.apache.org
>> For additional commands, e-mail: tuscany-dev-help@ws.apache.org
>>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: tuscany-dev-unsubscribe@ws.apache.org
> For additional commands, e-mail: tuscany-dev-help@ws.apache.org
>
>
--
Jean-Sebastien
---------------------------------------------------------------------
To unsubscribe, e-mail: tuscany-dev-unsubscribe@ws.apache.org
For additional commands, e-mail: tuscany-dev-help@ws.apache.org
Re: DataBinding issues - ClassCastException
Posted by Raymond Feng <en...@gmail.com>.
What problem did you see with JavaBean2XMLStreamReader? How to reproduce the
problem? I can take a quick look.
Thanks,
Raymond
----- Original Message -----
From: "Jean-Sebastien Delfino" <js...@apache.org>
To: <tu...@ws.apache.org>
Sent: Monday, November 12, 2007 12:05 PM
Subject: Re: DataBinding issues - ClassCastException
> Jean-Sebastien Delfino wrote:
>> Jean-Sebastien Delfino wrote:
>>> I'm trying to add some support for business objects to the Tutorial
>>> (instead of just flowing the catalog and cart items as strings).
>>>
>>> My business objects are simple JavaBeans with an empty constructor. I
>>> need to flow them as Java objects through local service calls, XML (in
>>> Atom payloads) and JSON.
>>>
>>> It should have been a simple exercise, but I've been running into a
>>> number of issues with the DataBinding framework. Here they are:
>>>
>>> 1. Some of the Bean2* and *2Bean transformers were missing to
>>> META-INF/services I added them.
>>>
>>> 2. The Databinding framework was not finding the transformers in XML <->
>>> registrations. I changed all instances of java.lang.String to xml.string
>>> in the registrations of the *2String and String2* transformer to fix
>>> that.
>>>
>>> 3. Next I ran into a ClassCastException in XML2JavaBeanTransformer at
>>> public Object transform(T source, TransformationContext context) {
>>> - -> XMLType xmlType = (XMLType)
>>> context.getSourceDataType().getLogical();
>>> as the logical type was Class instead of XMLType
>>>
>>> 4. I had to add "implements Serializable" to my business object class as
>>> it looks like we are using Java serialization to enforce pass by value
>>> in local service calls. I don't think it's right as we are not using
>>> Java serialization to pass the same business object through a remote
>>> call. We should change to use the same XML transformation to enforce
>>> pass by value with local calls as well, and not require the business
>>> objects to be Serializable.
>>>
>>> 5. After changes (1), (2), (3) and (4) I am now running into a build
>>> issue:
>>> testTransform1(org.apache.tuscany.sca.databinding.impl.MediatorImplTestCase)
>>> Time elapsed: 0.02 sec <<< ERROR!
>>> java.lang.ClassCastException:
>>> org.apache.tuscany.sca.databinding.DefaultTransformerExtensionPoint$LazyPullTransformer
>>> cannot be cast to org.apache.tuscany.sca.databinding.DataPipeTransformer
>>> at
>>> org.apache.tuscany.sca.databinding.impl.MediatorImpl.mediate(MediatorImpl.java:75)
>>> at
>>> org.apache.tuscany.sca.databinding.impl.MediatorImplTestCase.testTransform1(MediatorImplTestCase.java:104)
>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>> at
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>> at
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>> at java.lang.reflect.Method.invoke(Method.java:597)
>>> at junit.framework.TestCase.runTest(TestCase.java:168)
>>> at junit.framework.TestCase.runBare(TestCase.java:134)
>>> at junit.framework.TestResult$1.protect(TestResult.java:110)
>>> at junit.framework.TestResult.runProtected(TestResult.java:128)
>>> at junit.framework.TestResult.run(TestResult.java:113)
>>> at junit.framework.TestCase.run(TestCase.java:124)
>>> at junit.framework.TestSuite.runTest(TestSuite.java:232)
>>> at junit.framework.TestSuite.run(TestSuite.java:227)
>>> at
>>> org.junit.internal.runners.OldTestClassRunner.run(OldTestClassRunner.java:35)
>>> at
>>> org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:62)
>>> at
>>> org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:138)
>>> at
>>> org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:125)
>>> at org.apache.maven.surefire.Surefire.run(Surefire.java:132)
>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>> at
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>> at
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>> at java.lang.reflect.Method.invoke(Method.java:597)
>>> at
>>> org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:299)
>>> at
>>> org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:837)
>>>
>>> I'm getting to the end of the rope here... does anyone know what can
>>> cause error (5)?
>>>
>>> Thanks
>>>
>>
>> A little more info:
>>
>> The ClassCastException is on:
>> } else if (transformer instanceof PushTransformer) {
>> DataPipeTransformer dataPipeFactory = (i < size - 1) ?
>> (DataPipeTransformer)path.get(++i) : null;
>>
>> path =
>> [org.apache.tuscany.sca.databinding.xml.String2SAX@15a6029,
>> org.apache.tuscany.sca.databinding.DefaultTransformerExtensionPoint$LazyPullTransformer@5f6303;className=org.apache.tuscany.sca.databinding.xml.SAX2DOMPipe]
>>
>> sourceDataType = class java.lang.String java.lang.String class
>> java.lang.String
>> targetDataType = interface org.w3c.dom.Node org.w3c.dom.Node interface
>> org.w3c.dom.Node
>>
>
> Next stop on the road to databinding happiness: Revert changes (2) as
> registering the transformers with xml.string seems to confuse all the code
> that uses java.lang.String instead of xml.string as databinding name or
> id.
>
> I then get the following exception:
> Running
> org.apache.tuscany.sca.binding.ws.axis2.itests.HelloWorldNoWSDLTestCase
> info: Added Servlet mapping:
> http://delfinoj60.burlingame.ibm.com:8085/helloWorld
> info: Added Servlet mapping:
> http://delfinoj60.burlingame.ibm.com:8085/Echo
> info: Added Servlet mapping:
> http://delfinoj60.burlingame.ibm.com:8085/helloWorld
> info: Added Servlet mapping:
> http://delfinoj60.burlingame.ibm.com:8085/Echo
> severe:
> org.apache.tuscany.sca.databinding.javabeans.XML2JavaMapperException:
> java.lang.NullPointerException <bars> in <class
> org.apache.tuscany.sca.binding.ws.axis2.itests.Foo>
> org.osoa.sca.ServiceRuntimeException:
> org.apache.tuscany.sca.databinding.javabeans.XML2JavaMapperException:
> java.lang.NullPointerException <bars> in <class
> org.apache.tuscany.sca.binding.ws.axis2.itests.Foo>
> at
> org.apache.tuscany.sca.core.invocation.RuntimeWireInvoker.invoke(RuntimeWireInvoker.java:127)
> at
> org.apache.tuscany.sca.core.invocation.RuntimeWireInvoker.invoke(RuntimeWireInvoker.java:89)
> at
> org.apache.tuscany.sca.core.invocation.RuntimeWireInvoker.invoke(RuntimeWireInvoker.java:83)
> at
> org.apache.tuscany.sca.core.assembly.RuntimeWireImpl.invoke(RuntimeWireImpl.java:127)
> at
> org.apache.tuscany.sca.binding.ws.axis2.Axis2ServiceProvider.invokeTarget(Axis2ServiceProvider.java:567)
> at
> org.apache.tuscany.sca.binding.ws.axis2.Axis2ServiceInOutSyncMessageReceiver.invokeBusinessLogic(Axis2ServiceInOutSyncMessageReceiver.java:59)
> at
> org.apache.axis2.receivers.AbstractInOutSyncMessageReceiver.invokeBusinessLogic(AbstractInOutSyncMessageReceiver.java:42)
> at
> org.apache.axis2.receivers.AbstractMessageReceiver.receive(AbstractMessageReceiver.java:96)
> at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:145)
> at
> org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:275)
> at
> org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:120)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
> at
> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
> at
> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:367)
> at
> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
> at
> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712)
> at
> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
> at org.mortbay.jetty.Server.handle(Server.java:285)
> at
> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:502)
> at
> org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:835)
> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:641)
> at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:208)
> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:378)
> at
> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:368)
> at
> org.apache.tuscany.sca.core.work.Jsr237Work.run(Jsr237Work.java:61)
> at
> org.apache.tuscany.sca.core.work.ThreadPoolWorkManager$DecoratingWork.run(ThreadPoolWorkManager.java:205)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
> at java.lang.Thread.run(Thread.java:619)
> Caused by:
> org.apache.tuscany.sca.databinding.javabeans.XML2JavaMapperException:
> java.lang.NullPointerException <bars> in <class
> org.apache.tuscany.sca.binding.ws.axis2.itests.Foo>
> at
> org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.createJavaObject(XML2JavaBeanTransformer.java:110)
> at
> org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.toJavaObject(XML2JavaBeanTransformer.java:67)
> at
> org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.transform(XML2JavaBeanTransformer.java:59)
> at
> org.apache.tuscany.sca.databinding.DefaultTransformerExtensionPoint$LazyPullTransformer.transform(DefaultTransformerExtensionPoint.java:194)
> at
> org.apache.tuscany.sca.databinding.impl.MediatorImpl.mediate(MediatorImpl.java:73)
> at
> org.apache.tuscany.sca.core.databinding.transformers.Input2InputTransformer.transform(Input2InputTransformer.java:177)
> at
> org.apache.tuscany.sca.core.databinding.transformers.Input2InputTransformer.transform(Input2InputTransformer.java:43)
> at
> org.apache.tuscany.sca.databinding.impl.MediatorImpl.mediate(MediatorImpl.java:73)
> at
> org.apache.tuscany.sca.core.databinding.wire.DataTransformationInterceptor.transform(DataTransformationInterceptor.java:175)
> at
> org.apache.tuscany.sca.core.databinding.wire.DataTransformationInterceptor.invoke(DataTransformationInterceptor.java:72)
> at
> org.apache.tuscany.sca.core.invocation.RuntimeWireInvoker.invoke(RuntimeWireInvoker.java:118)
> ... 29 more
> Caused by: java.lang.NullPointerException
> at
> org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.createJavaObject(XML2JavaBeanTransformer.java:76)
> at
> org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.setFieldValueUsingSetter(XML2JavaBeanTransformer.java:164)
> at
> org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.createJavaObject(XML2JavaBeanTransformer.java:97)
> ... 39 more
> Tests run: 2, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 15.143 sec
> <<< FAILURE!
> testEchoFoo(org.apache.tuscany.sca.binding.ws.axis2.itests.HelloWorldNoWSDLTestCase)
> Time elapsed: 1.218 sec <<< ERROR!
> java.lang.reflect.UndeclaredThrowableException
> at $Proxy7.echoFoo(Unknown Source)
> at
> org.apache.tuscany.sca.binding.ws.axis2.itests.EchoComponent.echoFoo(EchoComponent.java:30)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> org.apache.tuscany.sca.implementation.java.invocation.JavaImplementationInvoker.invoke(JavaImplementationInvoker.java:105)
> at
> org.apache.tuscany.sca.core.databinding.wire.PassByValueInterceptor.invoke(PassByValueInterceptor.java:49)
> at
> org.apache.tuscany.sca.core.invocation.JDKInvocationHandler.invoke(JDKInvocationHandler.java:233)
> at
> org.apache.tuscany.sca.core.invocation.JDKInvocationHandler.invoke(JDKInvocationHandler.java:130)
> at $Proxy7.echoFoo(Unknown Source)
> at
> org.apache.tuscany.sca.binding.ws.axis2.itests.HelloWorldNoWSDLTestCase.testEchoFoo(HelloWorldNoWSDLTestCase.java:54)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at junit.framework.TestCase.runTest(TestCase.java:168)
> at junit.framework.TestCase.runBare(TestCase.java:134)
> at junit.framework.TestResult$1.protect(TestResult.java:110)
> at junit.framework.TestResult.runProtected(TestResult.java:128)
> at junit.framework.TestResult.run(TestResult.java:113)
> at junit.framework.TestCase.run(TestCase.java:124)
> at junit.framework.TestSuite.runTest(TestSuite.java:232)
> at junit.framework.TestSuite.run(TestSuite.java:227)
> at
> org.junit.internal.runners.OldTestClassRunner.run(OldTestClassRunner.java:35)
> at
> org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:62)
> at
> org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:138)
> at
> org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:125)
> at org.apache.maven.surefire.Surefire.run(Surefire.java:132)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:299)
> at
> org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:837)
> Caused by: org.apache.tuscany.sca.interfacedef.util.FaultException:
> org.apache.tuscany.sca.databinding.javabeans.XML2JavaMapperException:
> java.lang.NullPointerException <bars> in <class
> org.apache.tuscany.sca.binding.ws.axis2.itests.Foo>
> at
> org.apache.tuscany.sca.binding.ws.axis2.Axis2BindingInvoker.invoke(Axis2BindingInvoker.java:79)
> at
> org.apache.tuscany.sca.core.databinding.wire.DataTransformationInterceptor.invoke(DataTransformationInterceptor.java:74)
> at
> org.apache.tuscany.sca.core.invocation.JDKInvocationHandler.invoke(JDKInvocationHandler.java:233)
> at
> org.apache.tuscany.sca.core.invocation.JDKInvocationHandler.invoke(JDKInvocationHandler.java:130)
> ... 35 more
>
> caused by that line in
> databinding/src/main/resources/META-INF/services/org.apache.tuscany.sca.databinding.PullTransformer:
> org.apache.tuscany.sca.databinding.javabeans.JavaBean2XMLStreamReader;source=java:complexType,target=javax.xml.stream.XMLStreamReader,weight=79000
>
> I had added that line to use JavaBean2XMLStreamReader instead of
> JavaBean2DOMNodeTransformer, as going through a DOM is not the most
> optimized path from a JavaBean to XML :) but it looks like
> JavaBean2XMLStreamReader does not work as well as
> JavaBean2DOMNodeTransformer... After removing it the build is successful
> again.
>
> --
> Jean-Sebastien
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: tuscany-dev-unsubscribe@ws.apache.org
> For additional commands, e-mail: tuscany-dev-help@ws.apache.org
>
---------------------------------------------------------------------
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Re: DataBinding issues - ClassCastException
Posted by Jean-Sebastien Delfino <js...@apache.org>.
Jean-Sebastien Delfino wrote:
> Jean-Sebastien Delfino wrote:
>> I'm trying to add some support for business objects to the Tutorial
>> (instead of just flowing the catalog and cart items as strings).
>>
>> My business objects are simple JavaBeans with an empty constructor. I
>> need to flow them as Java objects through local service calls, XML
>> (in Atom payloads) and JSON.
>>
>> It should have been a simple exercise, but I've been running into a
>> number of issues with the DataBinding framework. Here they are:
>>
>> 1. Some of the Bean2* and *2Bean transformers were missing to
>> META-INF/services I added them.
>>
>> 2. The Databinding framework was not finding the transformers in XML
>> <-> registrations. I changed all instances of java.lang.String to
>> xml.string in the registrations of the *2String and String2*
>> transformer to fix that.
>>
>> 3. Next I ran into a ClassCastException in XML2JavaBeanTransformer at
>> public Object transform(T source, TransformationContext context) {
>> - -> XMLType xmlType = (XMLType)
>> context.getSourceDataType().getLogical();
>> as the logical type was Class instead of XMLType
>>
>> 4. I had to add "implements Serializable" to my business object class
>> as it looks like we are using Java serialization to enforce pass by
>> value in local service calls. I don't think it's right as we are not
>> using Java serialization to pass the same business object through a
>> remote call. We should change to use the same XML transformation to
>> enforce pass by value with local calls as well, and not require the
>> business objects to be Serializable.
>>
>> 5. After changes (1), (2), (3) and (4) I am now running into a build
>> issue:
>> testTransform1(org.apache.tuscany.sca.databinding.impl.MediatorImplTestCase)
>> Time elapsed: 0.02 sec <<< ERROR!
>> java.lang.ClassCastException:
>> org.apache.tuscany.sca.databinding.DefaultTransformerExtensionPoint$LazyPullTransformer
>> cannot be cast to org.apache.tuscany.sca.databinding.DataPipeTransformer
>> at
>> org.apache.tuscany.sca.databinding.impl.MediatorImpl.mediate(MediatorImpl.java:75)
>>
>> at
>> org.apache.tuscany.sca.databinding.impl.MediatorImplTestCase.testTransform1(MediatorImplTestCase.java:104)
>>
>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>> at
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>
>> at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>
>> at java.lang.reflect.Method.invoke(Method.java:597)
>> at junit.framework.TestCase.runTest(TestCase.java:168)
>> at junit.framework.TestCase.runBare(TestCase.java:134)
>> at junit.framework.TestResult$1.protect(TestResult.java:110)
>> at junit.framework.TestResult.runProtected(TestResult.java:128)
>> at junit.framework.TestResult.run(TestResult.java:113)
>> at junit.framework.TestCase.run(TestCase.java:124)
>> at junit.framework.TestSuite.runTest(TestSuite.java:232)
>> at junit.framework.TestSuite.run(TestSuite.java:227)
>> at
>> org.junit.internal.runners.OldTestClassRunner.run(OldTestClassRunner.java:35)
>>
>> at
>> org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:62)
>>
>> at
>> org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:138)
>>
>> at
>> org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:125)
>>
>> at org.apache.maven.surefire.Surefire.run(Surefire.java:132)
>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>> at
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>
>> at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>
>> at java.lang.reflect.Method.invoke(Method.java:597)
>> at
>> org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:299)
>>
>> at
>> org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:837)
>>
>>
>> I'm getting to the end of the rope here... does anyone know what can
>> cause error (5)?
>>
>> Thanks
>>
>
> A little more info:
>
> The ClassCastException is on:
> } else if (transformer instanceof PushTransformer) {
> DataPipeTransformer dataPipeFactory = (i < size - 1) ?
> (DataPipeTransformer)path.get(++i) : null;
>
> path =
> [org.apache.tuscany.sca.databinding.xml.String2SAX@15a6029,
> org.apache.tuscany.sca.databinding.DefaultTransformerExtensionPoint$LazyPullTransformer@5f6303;className=org.apache.tuscany.sca.databinding.xml.SAX2DOMPipe]
>
>
> sourceDataType = class java.lang.String java.lang.String class
> java.lang.String
> targetDataType = interface org.w3c.dom.Node org.w3c.dom.Node interface
> org.w3c.dom.Node
>
Next stop on the road to databinding happiness: Revert changes (2) as
registering the transformers with xml.string seems to confuse all the
code that uses java.lang.String instead of xml.string as databinding
name or id.
I then get the following exception:
Running
org.apache.tuscany.sca.binding.ws.axis2.itests.HelloWorldNoWSDLTestCase
info: Added Servlet mapping:
http://delfinoj60.burlingame.ibm.com:8085/helloWorld
info: Added Servlet mapping: http://delfinoj60.burlingame.ibm.com:8085/Echo
info: Added Servlet mapping:
http://delfinoj60.burlingame.ibm.com:8085/helloWorld
info: Added Servlet mapping: http://delfinoj60.burlingame.ibm.com:8085/Echo
severe:
org.apache.tuscany.sca.databinding.javabeans.XML2JavaMapperException:
java.lang.NullPointerException <bars> in <class
org.apache.tuscany.sca.binding.ws.axis2.itests.Foo>
org.osoa.sca.ServiceRuntimeException:
org.apache.tuscany.sca.databinding.javabeans.XML2JavaMapperException:
java.lang.NullPointerException <bars> in <class
org.apache.tuscany.sca.binding.ws.axis2.itests.Foo>
at
org.apache.tuscany.sca.core.invocation.RuntimeWireInvoker.invoke(RuntimeWireInvoker.java:127)
at
org.apache.tuscany.sca.core.invocation.RuntimeWireInvoker.invoke(RuntimeWireInvoker.java:89)
at
org.apache.tuscany.sca.core.invocation.RuntimeWireInvoker.invoke(RuntimeWireInvoker.java:83)
at
org.apache.tuscany.sca.core.assembly.RuntimeWireImpl.invoke(RuntimeWireImpl.java:127)
at
org.apache.tuscany.sca.binding.ws.axis2.Axis2ServiceProvider.invokeTarget(Axis2ServiceProvider.java:567)
at
org.apache.tuscany.sca.binding.ws.axis2.Axis2ServiceInOutSyncMessageReceiver.invokeBusinessLogic(Axis2ServiceInOutSyncMessageReceiver.java:59)
at
org.apache.axis2.receivers.AbstractInOutSyncMessageReceiver.invokeBusinessLogic(AbstractInOutSyncMessageReceiver.java:42)
at
org.apache.axis2.receivers.AbstractMessageReceiver.receive(AbstractMessageReceiver.java:96)
at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:145)
at
org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:275)
at
org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:120)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:367)
at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
at org.mortbay.jetty.Server.handle(Server.java:285)
at
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:502)
at
org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:835)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:641)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:208)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:378)
at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:368)
at
org.apache.tuscany.sca.core.work.Jsr237Work.run(Jsr237Work.java:61)
at
org.apache.tuscany.sca.core.work.ThreadPoolWorkManager$DecoratingWork.run(ThreadPoolWorkManager.java:205)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)
Caused by:
org.apache.tuscany.sca.databinding.javabeans.XML2JavaMapperException:
java.lang.NullPointerException <bars> in <class
org.apache.tuscany.sca.binding.ws.axis2.itests.Foo>
at
org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.createJavaObject(XML2JavaBeanTransformer.java:110)
at
org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.toJavaObject(XML2JavaBeanTransformer.java:67)
at
org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.transform(XML2JavaBeanTransformer.java:59)
at
org.apache.tuscany.sca.databinding.DefaultTransformerExtensionPoint$LazyPullTransformer.transform(DefaultTransformerExtensionPoint.java:194)
at
org.apache.tuscany.sca.databinding.impl.MediatorImpl.mediate(MediatorImpl.java:73)
at
org.apache.tuscany.sca.core.databinding.transformers.Input2InputTransformer.transform(Input2InputTransformer.java:177)
at
org.apache.tuscany.sca.core.databinding.transformers.Input2InputTransformer.transform(Input2InputTransformer.java:43)
at
org.apache.tuscany.sca.databinding.impl.MediatorImpl.mediate(MediatorImpl.java:73)
at
org.apache.tuscany.sca.core.databinding.wire.DataTransformationInterceptor.transform(DataTransformationInterceptor.java:175)
at
org.apache.tuscany.sca.core.databinding.wire.DataTransformationInterceptor.invoke(DataTransformationInterceptor.java:72)
at
org.apache.tuscany.sca.core.invocation.RuntimeWireInvoker.invoke(RuntimeWireInvoker.java:118)
... 29 more
Caused by: java.lang.NullPointerException
at
org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.createJavaObject(XML2JavaBeanTransformer.java:76)
at
org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.setFieldValueUsingSetter(XML2JavaBeanTransformer.java:164)
at
org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.createJavaObject(XML2JavaBeanTransformer.java:97)
... 39 more
Tests run: 2, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 15.143
sec <<< FAILURE!
testEchoFoo(org.apache.tuscany.sca.binding.ws.axis2.itests.HelloWorldNoWSDLTestCase)
Time elapsed: 1.218 sec <<< ERROR!
java.lang.reflect.UndeclaredThrowableException
at $Proxy7.echoFoo(Unknown Source)
at
org.apache.tuscany.sca.binding.ws.axis2.itests.EchoComponent.echoFoo(EchoComponent.java:30)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.apache.tuscany.sca.implementation.java.invocation.JavaImplementationInvoker.invoke(JavaImplementationInvoker.java:105)
at
org.apache.tuscany.sca.core.databinding.wire.PassByValueInterceptor.invoke(PassByValueInterceptor.java:49)
at
org.apache.tuscany.sca.core.invocation.JDKInvocationHandler.invoke(JDKInvocationHandler.java:233)
at
org.apache.tuscany.sca.core.invocation.JDKInvocationHandler.invoke(JDKInvocationHandler.java:130)
at $Proxy7.echoFoo(Unknown Source)
at
org.apache.tuscany.sca.binding.ws.axis2.itests.HelloWorldNoWSDLTestCase.testEchoFoo(HelloWorldNoWSDLTestCase.java:54)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at junit.framework.TestCase.runTest(TestCase.java:168)
at junit.framework.TestCase.runBare(TestCase.java:134)
at junit.framework.TestResult$1.protect(TestResult.java:110)
at junit.framework.TestResult.runProtected(TestResult.java:128)
at junit.framework.TestResult.run(TestResult.java:113)
at junit.framework.TestCase.run(TestCase.java:124)
at junit.framework.TestSuite.runTest(TestSuite.java:232)
at junit.framework.TestSuite.run(TestSuite.java:227)
at
org.junit.internal.runners.OldTestClassRunner.run(OldTestClassRunner.java:35)
at
org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:62)
at
org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:138)
at
org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:125)
at org.apache.maven.surefire.Surefire.run(Surefire.java:132)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:299)
at
org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:837)
Caused by: org.apache.tuscany.sca.interfacedef.util.FaultException:
org.apache.tuscany.sca.databinding.javabeans.XML2JavaMapperException:
java.lang.NullPointerException <bars> in <class
org.apache.tuscany.sca.binding.ws.axis2.itests.Foo>
at
org.apache.tuscany.sca.binding.ws.axis2.Axis2BindingInvoker.invoke(Axis2BindingInvoker.java:79)
at
org.apache.tuscany.sca.core.databinding.wire.DataTransformationInterceptor.invoke(DataTransformationInterceptor.java:74)
at
org.apache.tuscany.sca.core.invocation.JDKInvocationHandler.invoke(JDKInvocationHandler.java:233)
at
org.apache.tuscany.sca.core.invocation.JDKInvocationHandler.invoke(JDKInvocationHandler.java:130)
... 35 more
caused by that line in
databinding/src/main/resources/META-INF/services/org.apache.tuscany.sca.databinding.PullTransformer:
org.apache.tuscany.sca.databinding.javabeans.JavaBean2XMLStreamReader;source=java:complexType,target=javax.xml.stream.XMLStreamReader,weight=79000
I had added that line to use JavaBean2XMLStreamReader instead of
JavaBean2DOMNodeTransformer, as going through a DOM is not the most
optimized path from a JavaBean to XML :) but it looks like
JavaBean2XMLStreamReader does not work as well as
JavaBean2DOMNodeTransformer... After removing it the build is successful
again.
--
Jean-Sebastien
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Re: DataBinding issues - ClassCastException
Posted by Jean-Sebastien Delfino <js...@apache.org>.
Jean-Sebastien Delfino wrote:
> I'm trying to add some support for business objects to the Tutorial
> (instead of just flowing the catalog and cart items as strings).
>
> My business objects are simple JavaBeans with an empty constructor. I
> need to flow them as Java objects through local service calls, XML (in
> Atom payloads) and JSON.
>
> It should have been a simple exercise, but I've been running into a
> number of issues with the DataBinding framework. Here they are:
>
> 1. Some of the Bean2* and *2Bean transformers were missing to
> META-INF/services I added them.
>
> 2. The Databinding framework was not finding the transformers in XML
> <-> registrations. I changed all instances of java.lang.String to
> xml.string in the registrations of the *2String and String2*
> transformer to fix that.
>
> 3. Next I ran into a ClassCastException in XML2JavaBeanTransformer at
> public Object transform(T source, TransformationContext context) {
> - -> XMLType xmlType = (XMLType)
> context.getSourceDataType().getLogical();
> as the logical type was Class instead of XMLType
>
> 4. I had to add "implements Serializable" to my business object class
> as it looks like we are using Java serialization to enforce pass by
> value in local service calls. I don't think it's right as we are not
> using Java serialization to pass the same business object through a
> remote call. We should change to use the same XML transformation to
> enforce pass by value with local calls as well, and not require the
> business objects to be Serializable.
>
> 5. After changes (1), (2), (3) and (4) I am now running into a build
> issue:
> testTransform1(org.apache.tuscany.sca.databinding.impl.MediatorImplTestCase)
> Time elapsed: 0.02 sec <<< ERROR!
> java.lang.ClassCastException:
> org.apache.tuscany.sca.databinding.DefaultTransformerExtensionPoint$LazyPullTransformer
> cannot be cast to org.apache.tuscany.sca.databinding.DataPipeTransformer
> at
> org.apache.tuscany.sca.databinding.impl.MediatorImpl.mediate(MediatorImpl.java:75)
>
> at
> org.apache.tuscany.sca.databinding.impl.MediatorImplTestCase.testTransform1(MediatorImplTestCase.java:104)
>
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>
> at java.lang.reflect.Method.invoke(Method.java:597)
> at junit.framework.TestCase.runTest(TestCase.java:168)
> at junit.framework.TestCase.runBare(TestCase.java:134)
> at junit.framework.TestResult$1.protect(TestResult.java:110)
> at junit.framework.TestResult.runProtected(TestResult.java:128)
> at junit.framework.TestResult.run(TestResult.java:113)
> at junit.framework.TestCase.run(TestCase.java:124)
> at junit.framework.TestSuite.runTest(TestSuite.java:232)
> at junit.framework.TestSuite.run(TestSuite.java:227)
> at
> org.junit.internal.runners.OldTestClassRunner.run(OldTestClassRunner.java:35)
>
> at
> org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:62)
>
> at
> org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:138)
>
> at
> org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:125)
>
> at org.apache.maven.surefire.Surefire.run(Surefire.java:132)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:299)
>
> at
> org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:837)
>
>
> I'm getting to the end of the rope here... does anyone know what can
> cause error (5)?
>
> Thanks
>
A little more info:
The ClassCastException is on:
} else if (transformer instanceof PushTransformer) {
DataPipeTransformer dataPipeFactory = (i < size - 1) ?
(DataPipeTransformer)path.get(++i) : null;
path =
[org.apache.tuscany.sca.databinding.xml.String2SAX@15a6029,
org.apache.tuscany.sca.databinding.DefaultTransformerExtensionPoint$LazyPullTransformer@5f6303;className=org.apache.tuscany.sca.databinding.xml.SAX2DOMPipe]
sourceDataType = class java.lang.String java.lang.String class
java.lang.String
targetDataType = interface org.w3c.dom.Node org.w3c.dom.Node interface
org.w3c.dom.Node
--
Jean-Sebastien
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