Description Michael Moser 2004-05-28 07:03:28 EDT

Hi,
I had defined a policy aspect to detect all System.out and System.err usages:

public aspect DetectSystemOutErrorUsage 
{
 pointcut allSystemOutAndSystemErrAccesses(): 
  (get(* System.out) || get(* System.err))
  && !adviceexecution();
 
 declare warning: 
  allSystemOutAndSystemErrAccesses() 
  && !within(myproject.test..*) // we don't care about test code
  && !within(myproject.log..*) // and the Log-package can log to whereever it 
wants to...
>>  && !withincode(* myproject.Test.create(..)) // the logger is only created 
in that method, so we must not log calls to this method
  : "Warning: use of System.out or System.err - consider logging instead!";
}

This advice was working fine. But then I added the line marked with >> since it 
also complained about the create() method, in which I create the logger and if 
that fails I write a message to System.err about the failed logger creation. 
This should not yield a warning, so I wanted to exclude that from the pointcut.

But If I add that to the aspect and then re-compile my project I get a null-
pointer exception:

Except from the eclipse log:
-------------------------------------------------------
...
eclipse.buildId=I200405211200
java.version=1.4.2_03
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=en_US
!ENTRY org.eclipse.ajdt.ui 4 0 May 28, 2004 12:35:58.259
!MESSAGE NullPointerException thrown: null
!STACK 0
java.lang.NullPointerException
 at org.aspectj.weaver.patterns.SignaturePattern.matches
(SignaturePattern.java:87)
 at org.aspectj.weaver.patterns.WithincodePointcut.match
(WithincodePointcut.java:42)
 at org.aspectj.weaver.patterns.NotPointcut.match(NotPointcut.java:45)
 at org.aspectj.weaver.patterns.AndPointcut.match(AndPointcut.java:42)
 at org.aspectj.weaver.patterns.AndPointcut.match(AndPointcut.java:42)
 at org.aspectj.weaver.patterns.AndPointcut.match(AndPointcut.java:42)
 at org.aspectj.weaver.ShadowMunger.match(ShadowMunger.java:62)
 at org.aspectj.weaver.Checker.match(Checker.java:48)
 at org.aspectj.weaver.bcel.BcelClassWeaver.match(BcelClassWeaver.java:1121)
 at org.aspectj.weaver.bcel.BcelClassWeaver.matchInit(BcelClassWeaver.java:895)
 at org.aspectj.weaver.bcel.BcelClassWeaver.match(BcelClassWeaver.java:793)
 at org.aspectj.weaver.bcel.BcelClassWeaver.weave(BcelClassWeaver.java:343)
 at org.aspectj.weaver.bcel.BcelClassWeaver.weave(BcelClassWeaver.java:80)
 at org.aspectj.weaver.bcel.BcelWeaver.weave(BcelWeaver.java:724)
 at org.aspectj.weaver.bcel.BcelWeaver.weaveWithoutDump(BcelWeaver.java:689)
 at org.aspectj.weaver.bcel.BcelWeaver.weaveAndNotify(BcelWeaver.java:615)
 at org.aspectj.weaver.bcel.BcelWeaver.weave(BcelWeaver.java:563)
 at org.aspectj.ajdt.internal.compiler.AjCompilerAdapter.weave
(AjCompilerAdapter.java:239)
 at org.aspectj.ajdt.internal.compiler.AjCompilerAdapter.afterCompiling
(AjCompilerAdapter.java:114)
 at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:376)
 at org.aspectj.ajdt.internal.core.builder.AjBuildManager.performCompilation
(AjBuildManager.java:601)
 at org.aspectj.ajdt.internal.core.builder.AjBuildManager.doBuild
(AjBuildManager.java:160)
 at org.aspectj.ajdt.internal.core.builder.AjBuildManager.batchBuild
(AjBuildManager.java:94)
 at org.aspectj.ajde.internal.CompilerAdapter.compile(CompilerAdapter.java:108)
 at org.aspectj.ajde.internal.AspectJBuildManager$CompilerThread.run
(AspectJBuildManager.java:165)
-------------------------------------------------------

This is using Eclipse 3.0M9 and AJDT 1.1.10.

Regards,
Michael