Description Misha Kantarovich 2005-11-16 03:54:11 EST

Hi again :-)

I'm trying to use loadtime weaving and getting an exception. Please look at the 
testcase:

Java code:
==========
public class Test<T> {

	Set<T> intsSet;

	public Test() {
		this.intsSet = new HashSet<T>();
	}

	public <T> T[] getObjs(T[] a) {
		return intsSet.toArray(a);
	}

	public static void main(String[] args) {
		System.out.println("AAA :-)");
		new TTT().foo();
	}
}

class TTT {
	public void foo() {
		Test<Object> mt = new Test<Object>();
		Object[] arr = mt.getObjs(new Object[]{});
	}
}

Aspect:
=======
public privileged aspect TestAspect {

      pointcut TestToArray(Test mt) :
                target(mt) &&
                !within(TestAspect);


    Object[] around(Test mt, Object[] objs) :
            TestToArray(mt) &&
            args(objs) &&
            execution(Object[] com.mprv.secsph.Test.getObjs(Object[])) {

        objs = proceed(mt, objs);
        System.out.println("GO Aspects!");
        return objs;
    }
}

aop.xml
=======
<aspectj>
	<aspects>
		<aspect name="com.mprv.secsph.TestAspect"/>
	</aspects>

	<weaver options="-verbose -XlazyTjp -showWeaveInfo">
		<include within="com.mprv.*"/>
	</weaver>
</aspectj>

Program output:
==============
AAA :-)
info weaving 'com/mprv/secsph/TestAspect'
java.lang.NullPointerException
	at 
org.aspectj.weaver.tools.WeavingAdaptor$WeavingClassFileProvider.getBytes
(WeavingAdaptor.java:390)
	at org.aspectj.weaver.tools.WeavingAdaptor.getAtAspectJAspectBytes
(WeavingAdaptor.java:259)
	at org.aspectj.weaver.tools.WeavingAdaptor.weaveClass
(WeavingAdaptor.java:181)
	at org.aspectj.weaver.loadtime.Aj.preProcess(Aj.java:66)
	at org.aspectj.weaver.loadtime.ClassPreProcessorAgentAdapter.transform
(ClassPreProcessorAgentAdapter.java:52)
	at sun.instrument.TransformerManager.transform
(TransformerManager.java:122)
	at sun.instrument.InstrumentationImpl.transform
(InstrumentationImpl.java:155)
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
	at java.security.SecureClassLoader.defineClass
(SecureClassLoader.java:124)
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
	at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
	at com.mprv.secsph.Test.getObjs(Test.java:1)
	at com.mprv.secsph.TTT.foo(Test.java:34)
	at com.mprv.secsph.Test.main(Test.java:27)
	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 com.intellij.rt.execution.application.AppMain.main(AppMain.java:86)
GO Aspects!

====

This exception doesn't happen all the time ... but if you will try a few times, 
you will probably get it. May you can understand what is the problem event 
without running the test case. 

Anyway, I took a look at your code, and have a guess (but it's only the guess) -
My aspect is in the application classpath. Actually it's in the same package, 
so may be you are trying to weave the aspect with itself somehow ...

Thanks!
Misha.