Hi,
If I use dynamic AOP and the "Design by Contract" @Dbc at the same time I get
strange "duplicate method" error. This only occur for class methods that are
implementing an interface method but
the class method return type is overriding the method return type defined
defined in the interface;
javassist.CannotCompileException: duplicate method:
test$dynamicaop$MyClass$getObj$aop
at javassist.bytecode.ClassFile.testExistingMethod(ClassFile.java:544)
at javassist.bytecode.ClassFile.addMethod(ClassFile.java:528)
at javassist.CtClassType.addMethod(CtClassType.java:1099)
.........
I'm running it within eclipse using loadtime instrumentation. JVM args;
-Djboss.aop.path=META-INF/jboss-aop.xml -javaagent:lib/jboss-aop-jdk50.jar
-Djboss.aop.verbose=true
Setup was based on the dynamic aop tutorial but I've stripped out what is not
relevant;
Driver.java
public class Driver {
| public static void main(String[] args) throws Exception {
| execute();
| }
|
| public static void execute() {
| MyClass obj = new MyClass();
| }
| }
MyObj.java
package test.dynamicaop;
|
| import org.jboss.aspects.dbc.Dbc;
|
| @Dbc
| public class MyClass implements MyInterface {
|
| /*
| * Runs ok if method is - public Object getObj() { return new MyObj(); }
| */
| public MyObj getObj() {
| return new MyObj();
| }
| }
MyInterface .java
| package test.dynamicaop;
|
| public interface MyInterface {
| public Object getObj();
| }
jboss-aop.xml
| <?xml version="1.0" encoding="UTF-8"?>
| <aop>
| <prepare expr="all(test.dynamicaop.POJO)"/>
|
| <aspect class="org.jboss.aspects.dbc.DesignByContractAspect"
scope="PER_JOINPOINT">
| <attribute name="verbose">true</attribute>
| </aspect>
|
| <bind pointcut="execution(* [EMAIL PROTECTED]>*(..)) OR execution([EMAIL
PROTECTED]>new(..))">
| <advice aspect="org.jboss.aspects.dbc.DesignByContractAspect"
name="invoke"/>
| </bind>
|
| </aop>
Adjust the public MyObj getObj() method to public Object getObj() and its ok.
regards
James
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