[news.eclipse.tools.jdt] Re: IMethodBinding#overrides() returns false wh

[Sebastian Schmidt <sebastiangschmidt@xxxxxx>]

Hi Romain,

you are absolutely right. I forgot to type that in my post when 
simplifying my real scenario.

But the real code contians the extends statement.

Romain Dervaux schrieb:
> Shouldn't SubExample extends AbstractExample ?
>
>
> Sebastian Schmidt a écrit :
> > Hi @ll,
> >
> > I got a problem when checking if a method overrides another one.
> > Consider the following scenario:
> >
> > public abstract class AbstractExample {
> >
> >  public void foo(){
> >   bar();
> >  }
> >
> >  protected abstract void bar();
> >
> > }
> >
> > public calss SubExample {
> >
> >  protected void bar(){
> >   doSomething();
> >  }
> >
> > }
> >
> > In the process of my application, SubExample is analysed. I create AST 
> > instances for this type and its supertypes by use of the type 
> > hierarchy and multiple loops with these statements:
> >
> >      parser.setSource(unit);
> >      parser.setKind(ASTParser.K_COMPILATION_UNIT);
> >      parser.setCompilerOptions(parserOptions);
> >      parser.setResolveBindings(true);
> >      CompilationUnit node = (CompilationUnit) parser.createAST(null);
> >      hierarchyUnits.add(node);
> >
> > Afterwards I use an ASTVisitor on all of these ASTs to collect the 
> > MethodDeclarations.
> >
> > Later on I want to find in the set of MethodDeclarations the 
> > implementing methods of abstract method declarations. After checking 
> > for  equality of identifier I call:
> >
> > boolean overrides(MethodDeclaration subExampleMethod, MethodDeclaration
> >    abstractExampleMethod){
> >
> >  return subExampleMethod.resolveBinding().overrides(
> >   abstractExampleMethod.resolveBinding());
> > }
> >
> > But this always returns false.
> > When debugging into the code I found the line where I assume the 
> > problem to be located.
> > In org.eclipse.jdt.internal.compiler.lookup.TypeBinding line 287 (lib: 
> > org.eclipse.jdt.core_3.4.4.v_894_R34x.jar)
> >
> > there is a comparison of two SourceTypeBinding instances "if 
> > (currentType == otherType)" that results to false even if the two 
> > instances represent the same type (AbstractExample). They have 
> > different ids in the Variables view but the same value (at least the 
> > string representation in the value view is identical). Sadly even the 
> > .equals method returns false.
> >
> >
> > So, what am I doing wrong to get an IMethodBinding that yields another 
> > instance of SourceTypeBinding as is returned as superclass from the 
> > subclass binding?
> > Do both MethodDeclarations have to originate from the same AST?
> > Is there something else I could try to get this task done?
> >
> > Every help or hint is appreciated.
> >
> > Best regards,
> > Sebastian