Description Walter Harley 2007-02-07 19:44:05 EST

The APT annotation discovery visitor walks the AST of a compilation unit, and when it visits an annotation, it makes the following calls:

  ASTNode.resolveAnnotations(
              scope, 
              new Annotation[] { annotation }, 
              this.currentBinding);
  AnnotationBinding binding = annotation.getCompilerAnnotation();

When a class is given two annotations, only the first one seems to be resolved.  When the second one gets visited, the AnnotationBinding returned from getCompilerAnnotation() is null.

To repro: 
0. Ensure you have o.e.jdt.compiler.apt and o.e.jdt.compiler.apt.tests plug-ins in your workspace.
1. Apply the soon-to-be-attached patch file to the o.e.jdt.compiler.apt.tests plug-in, in order to add the new test.  
2. Right-click apttestprocessors.jardesc and create the processor jar.
3. Execute CompilerAptTests as a JUnit Test.  (Not a JUnit Plug-in Test!)

You should see the appended stack trace:

java.lang.NullPointerException
	at org.eclipse.jdt.internal.compiler.apt.dispatch.AnnotationDiscoveryVisitor.endVisit(AnnotationDiscoveryVisitor.java:102)
	at org.eclipse.jdt.internal.compiler.ast.MarkerAnnotation.traverse(MarkerAnnotation.java:39)
	at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.traverse(TypeDeclaration.java:1186)
	at org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration.traverse(CompilationUnitDeclaration.java:510)
	at org.eclipse.jdt.internal.compiler.apt.dispatch.RoundEnvImpl.<init>(RoundEnvImpl.java:31)
	at org.eclipse.jdt.internal.compiler.apt.dispatch.BaseAnnotationProcessorManager.processAnnotations(BaseAnnotationProcessorManager.java:138)
	at org.eclipse.jdt.internal.compiler.Compiler.processAnnotations(Compiler.java:655)
	at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:373)
	at org.eclipse.jdt.internal.compiler.batch.Main.performCompilation(Main.java:3024)
	at org.eclipse.jdt.internal.compiler.tool.EclipseCompiler.call(EclipseCompiler.java:97)
	at org.eclipse.jdt.internal.compiler.tool.EclipseCompiler$4.call(EclipseCompiler.java:335)
	at org.eclipse.jdt.compiler.apt.tests.CompilerAptTests.compileOneClass(CompilerAptTests.java:341)
	at org.eclipse.jdt.compiler.apt.tests.CompilerAptTests.testTwoAnnotations(CompilerAptTests.java:204)