Details
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Bug
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Status: Closed
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Blocker
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Resolution: Fixed
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Java-SDO-beta1
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None
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OS X Eclipse 3.3 M7
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Patch Available
Description
When I execute:
XSDHelper.INSTANCE.define(schema, null);
I end up with a NullPointerException. I've tracked down root cause ...
The static initializer of the HelperProvider executes this code:
provider = getInstance(HelperProvider.class.getClassLoader());
which ends up calling:
HelperProvider provider = loadImplementation(cl, implName);
implName is null so
if (implName == null)
{ implName = getImplementationName(cl); }ends up calling
implName = getImplementationName(cl);
which ends up calling:
InputStream is = cl.getResourceAsStream(SERVICE_RESOURCE_NAME);
where SERVICE_RESORUCE_NAME = "META-INF/services/commonj.sdo.impl.HelperProvider"
getResourceAsStream() return null because META-INF/services does not exist in the API bundle. It exists in the IMPL bundle and since you are using the class loader from the API bundle, it won't work.
You can set
-Dcommonj.sdo.impl.HelperProvider=org.apache.tuscany.sdo.helper.HelperProviderImpl
to get around the above problem, but as soon as
return (HelperProvider) cl.loadClass(implName).newInstance();
executes, you get a CalssNotFoundException. Again, this is because you are trying to load a class outside the bundle with the wrong class loader.
tried modifying the API manifest by hand to add
Eclipse-BuddyPolicy: dependent
and
Eclipse-BuddyPolicy: global
Either of those buddy policies will get past the class loader problem (although I believe this is specific to eclipse and won't work for OSGi in general), but when HelperProvider is initializing, you get the following exception:
java.lang.ExceptionInInitializerError
at org.apache.tuscany.sdo.impl.AttributeImpl.<clinit>(AttributeImpl.java:126)
at org.apache.tuscany.sdo.impl.SDOFactoryImpl.createAttribute(SDOFactoryImpl.java:239)
at org.apache.tuscany.sdo.impl.ClassImpl.<clinit>(ClassImpl.java:68)
at org.apache.tuscany.sdo.impl.SDOFactoryImpl$SDOEcoreFactory.createEClass(SDOFactoryImpl.java:76)
at org.apache.tuscany.sdo.impl.SDOPackageImpl.createEClass(SDOPackageImpl.java:622)
at org.apache.tuscany.sdo.impl.SDOPackageImpl.createPackageContents(SDOPackageImpl.java:550)
at org.apache.tuscany.sdo.impl.SDOPackageImpl.init(SDOPackageImpl.java:259)
at org.apache.tuscany.sdo.SDOPackage.<clinit>(SDOPackage.java:76)
at sun.misc.Unsafe.ensureClassInitialized(Native Method)
at sun.reflect.UnsafeFieldAccessorFactory.newFieldAccessor(UnsafeFieldAccessorFactory.java:25)
at sun.reflect.ReflectionFactory.newFieldAccessor(ReflectionFactory.java:122)
at java.lang.reflect.Field.acquireFieldAccessor(Field.java:917)
at java.lang.reflect.Field.getFieldAccessor(Field.java:898)
at java.lang.reflect.Field.get(Field.java:357)
at org.apache.tuscany.sdo.util.SDOUtil.registerStaticTypes(SDOUtil.java:196)
at org.apache.tuscany.sdo.model.impl.ModelFactoryImpl.init(ModelFactoryImpl.java:731)
at org.apache.tuscany.sdo.model.ModelFactory.<clinit>(ModelFactory.java:41)
at org.apache.tuscany.sdo.helper.TypeHelperImpl.getBuiltInModels(TypeHelperImpl.java:61)
at org.apache.tuscany.sdo.helper.TypeHelperImpl.<init>(TypeHelperImpl.java:79)
at org.apache.tuscany.sdo.helper.HelperContextImpl.<init>(HelperContextImpl.java:46)
at org.apache.tuscany.sdo.helper.HelperProviderImpl.createDefaultHelpers(HelperProviderImpl.java:38)
at org.apache.tuscany.sdo.rtlib.helper.HelperProviderBase.<init>(HelperProviderBase.java:78)
at org.apache.tuscany.sdo.helper.HelperProviderImpl.<init>(HelperProviderImpl.java:31)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
at java.lang.Class.newInstance0(Class.java:350)
at java.lang.Class.newInstance(Class.java:303)
at commonj.sdo.impl.HelperProvider.loadImplementation(HelperProvider.java:157)
at commonj.sdo.impl.HelperProvider.getInstance(HelperProvider.java:126)
at commonj.sdo.impl.HelperProvider.<clinit>(HelperProvider.java:69)
at commonj.sdo.helper.XSDHelper.<clinit>(XSDHelper.java:195)
at notification.sdo.Application.start(Application.java:23)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:153)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:363)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:176)
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:585)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:497)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:436)
at org.eclipse.equinox.launcher.Main.run(Main.java:1162)
at org.eclipse.equinox.launcher.Main.main(Main.java:1137)
Caused by: java.lang.NullPointerException
at org.apache.tuscany.sdo.impl.AttributeImpl.eStaticClass(AttributeImpl.java:73)
at org.eclipse.emf.ecore.impl.EObjectImpl.eClass(EObjectImpl.java:224)
at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eDynamicInverseAdd(BasicEObjectImpl.java:1413)
at org.eclipse.emf.ecore.impl.EStructuralFeatureImpl.eInverseAdd(EStructuralFeatureImpl.java:514)
at org.eclipse.emf.ecore.impl.BasicEObjectImpl.eInverseAdd(BasicEObjectImpl.java:1389)
at org.eclipse.emf.ecore.util.EcoreEList.inverseAdd(EcoreEList.java:282)
at org.eclipse.emf.common.notify.impl.NotifyingListImpl.addUnique(NotifyingListImpl.java:318)
at org.eclipse.emf.common.util.BasicEList.add(BasicEList.java:626)
at org.eclipse.emf.ecore.impl.EPackageImpl.createEAttribute(EPackageImpl.java:745)
at org.apache.tuscany.sdo.impl.FactoryBase.createDocumentRoot(FactoryBase.java:301)
at org.apache.tuscany.sdo.impl.FactoryBase.initXSD(FactoryBase.java:156)
at org.apache.tuscany.sdo.model.internal.impl.InternalFactoryImpl.createXSDMetaData(InternalFactoryImpl.java:211)
at org.apache.tuscany.sdo.model.internal.impl.InternalFactoryImpl.initializeMetaData(InternalFactoryImpl.java:206)
at org.apache.tuscany.sdo.model.internal.impl.InternalFactoryImpl.init(InternalFactoryImpl.java:172)
at org.apache.tuscany.sdo.model.internal.InternalFactory.<clinit>(InternalFactory.java:41)
... 47 more