Description Adam Smyczek 2006-10-18 22:23:58 EDT

Generic parameters (like List<? extends T>) in pointcuts throw UnsupportedOperationException.

java.lang.UnsupportedOperationException
at org.aspectj.weaver.UnresolvedType.parameterize(UnresolvedType.java: 220)
at org.aspectj.weaver.patterns.ExactTypePattern.parameterizeWith (ExactTypePattern.java:244)
at org.aspectj.weaver.patterns.SignaturePattern.parameterizeWith (SignaturePattern.java:265)
at org.aspectj.weaver.patterns.KindedPointcut.parameterizeWith (KindedPointcut.java:381)
at org.aspectj.weaver.bcel.BcelAdvice.parameterizeWith (BcelAdvice.java:93)
at org.aspectj.weaver.ResolvedType.getDeclaredAdvice (ResolvedType.java:710)
at org.aspectj.weaver.ResolvedType.getDeclaredShadowMungers (ResolvedType.java:739)
at org.aspectj.weaver.ResolvedType.collectShadowMungers (ResolvedType.java:575)
at org.aspectj.weaver.ResolvedType.collectCrosscuttingMembers (ResolvedType.java:504)
at org.aspectj.weaver.CrosscuttingMembersSet.addOrReplaceAspect (CrosscuttingMembersSet.java:68)
at org.aspectj.weaver.CrosscuttingMembersSet.addOrReplaceAspect (CrosscuttingMembersSet.java:57)
at org.aspectj.weaver.bcel.BcelWeaver.prepareForWeave(BcelWeaver.java: 450)
at org.aspectj.ajdt.internal.compiler.AjCompilerAdapter.weave (AjCompilerAdapter.java:299)
at org.aspectj.ajdt.internal.compiler.AjCompilerAdapter.afterCompiling (AjCompilerAdapter.java:192)
at org.aspectj.ajdt.internal.compiler.CompilerAdapter.ajc $afterReturning$org_aspectj_ajdt_internal_compiler_CompilerAdapter$2 $f9cc9ca0(CompilerAdapter.aj:70)
at org.aspectj.org.eclipse.jdt.internal.compiler.Compiler.compile (Compiler.java:367)
at org.aspectj.ajdt.internal.core.builder.AjBuildManager.performCompilation (AjBuildManager.java:887)
at org.aspectj.ajdt.internal.core.builder.AjBuildManager.doBuild (AjBuildManager.java:244)
at org.aspectj.ajdt.internal.core.builder.AjBuildManager.batchBuild (AjBuildManager.java:163)
at org.aspectj.ajde.internal.CompilerAdapter.compile (CompilerAdapter.java:122)
at org.aspectj.ajde.internal.AspectJBuildManager$CompilerThread.run (AspectJBuildManager.java:191)

UnsupportedOperationException thrown: unable to parameterize unresolved type: Pjava/util/List<+Ljava/lang/Object;>;

To reproduce this exception compile the following code snippet.

import java.util.ArrayList;
import java.util.List;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;

public class Main {

  public List<? extends Element> getElements() {
    return new ArrayList<Element>();
  }

  class Element {};

  @Aspect
  static abstract class Base<T> {
    @Around("call(List<? extends T> *.*(..))")
    public List<? extends T> elementList(ProceedingJoinPoint thisJoinPoint) {
      try {
        return (List<? extends T>)thisJoinPoint.proceed();
      } catch (Throwable e) {
        throw new RuntimeException(e);
      }
    }
  }

  @Aspect
  static class Concrete extends Base<Element> {}

  public static void main(String[] args) {
    new Main().getElements();
  }
	
}