| Fatal problem with TreeAppendable [message #1717031] |
Wed, 09 December 2015 16:54  |
 Ingo Meyer
Messages: 162
Registered: July 2009 |
Senior Member |
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Hi,
from one model element, similar to Entity in DomainmodExample, I inferr two Java elements, one interface and one implementation class. The implementation class will not compile as the setter method parameter throws really crazy error at compile time:
java.lang.NullPointerException
at org.eclipse.xtext.xbase.compiler.JvmModelGenerator$43.getURIForTrace(JvmModelGenerator.java:2019)
at org.eclipse.xtext.xbase.compiler.output.TreeAppendable.createLocationData(TreeAppendable.java:296)
at org.eclipse.xtext.xbase.compiler.output.TreeAppendable.createLocationData(TreeAppendable.java:231)
at org.eclipse.xtext.xbase.compiler.output.TreeAppendable.createAllLocationData(TreeAppendable.java:246)
at org.eclipse.xtext.xbase.compiler.output.TreeAppendable.createAllLocationData(TreeAppendable.java:256)
at org.eclipse.xtext.xbase.compiler.output.TreeAppendable.trace(TreeAppendable.java:176)
at org.eclipse.xtext.xbase.compiler.output.TreeAppendable.trace(TreeAppendable.java:171)
at org.eclipse.xtext.xbase.compiler.output.TreeAppendable.trace(TreeAppendable.java:166)
at org.eclipse.xtext.xbase.compiler.output.TreeAppendable.trace(TreeAppendable.java:1)
at org.eclipse.xtext.xbase.compiler.TypeReferenceSerializer.serialize(TypeReferenceSerializer.java:91)
at org.eclipse.xtext.xbase.compiler.TypeReferenceSerializer.serialize(TypeReferenceSerializer.java:84)
at org.eclipse.xtext.xbase.compiler.TypeReferenceSerializer.serialize(TypeReferenceSerializer.java:81)
at org.eclipse.xtext.xbase.compiler.ErrorSafeExtensions.serializeSafely(ErrorSafeExtensions.java:242)
at org.eclipse.xtext.xbase.compiler.JvmModelGenerator.generateParameter(JvmModelGenerator.java:1232)
at org.eclipse.xtext.xbase.compiler.JvmModelGenerator.generateParameters(JvmModelGenerator.java:1205)
at org.eclipse.xtext.xbase.compiler.JvmModelGenerator._generateMember(JvmModelGenerator.java:996)
at org.eclipse.xtext.xbase.compiler.JvmModelGenerator.generateMember(JvmModelGenerator.java:2190)
at xxx
at org.eclipse.xtext.xbase.lib.ObjectExtensions.operator_doubleArrow(ObjectExtensions.java:139)
at org.eclipse.xtext.xbase.compiler.LoopExtensions$1.apply(LoopExtensions.java:40)
at org.eclipse.xtext.xbase.lib.IteratorExtensions.forEach(IteratorExtensions.java:363)
at org.eclipse.xtext.xbase.lib.IterableExtensions.forEach(IterableExtensions.java:333)
at org.eclipse.xtext.xbase.compiler.LoopExtensions.forEach(LoopExtensions.java:43)
at xxx
at org.eclipse.xtext.xbase.compiler.JvmModelGenerator._generateBody(JvmModelGenerator.java:287)
at org.eclipse.xtext.xbase.compiler.JvmModelGenerator.generateBody(JvmModelGenerator.java:2162)
at org.eclipse.xtext.xbase.compiler.JvmModelGenerator.generateType(JvmModelGenerator.java:231)
at org.eclipse.xtext.xbase.compiler.JvmModelGenerator._internalDoGenerate(JvmModelGenerator.java:217)
at org.eclipse.xtext.xbase.compiler.JvmModelGenerator.internalDoGenerate(JvmModelGenerator.java:2145)
(The xxx stacktrace element is a own class which just delegates and do nothing with the objects.)
It is where the setter parameter will be serialized to the appendable. Its resource is null. but this is really!!! not true. As I found out, the method "createAllLocationData" of TreeAppendable will use the "jvmModelAssociations.getSourceElements(object)" to do something with the source elements:
protected static Set<ILocationData> createAllLocationData(ITraceURIConverter converter, ILocationInFileProvider locationProvider, IJvmModelAssociations jvmModelAssociations, EObject object, ILocationInFileProviderExtension.RegionDescription query, boolean skipEmpty) {
Set<EObject> sourceElements = jvmModelAssociations.getSourceElements(object);
Set<ILocationData> result = Collections.emptySet();
if (sourceElements.isEmpty()) {
ILocationData locationData = createLocationData(converter, locationProvider, object, query, skipEmpty);
if (locationData != null) {
result = Collections.singleton(locationData);
}
} else {
result = Sets.newHashSet();
for(EObject sourceElement: sourceElements) {
ILocationData locationData = createLocationData(converter, locationProvider, sourceElement, query, skipEmpty);
if (locationData != null) {
result.add(locationData);
}
}
}
return result;
}
But the source element of the setter parameter, a "JvmParameterizedTypeReference: java.util.List<JvmParameterizedTypeReference: MySetterModelObject>", is another "JvmParameterizedTypeReference: java.util.List" with a container JvmUpperBound with a container JvmWildcardTypeReference with NO container. So where the heck is that coming from???
Really bad is also that I have no chance to overwrite the TreeAppendable, right? I don't need the tracing stuff and the model is correct.
I have no idea what to do and I am lost.
Any hints are really appreciated,
Thanks Ingo
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