[news.eclipse.tools.jdt] Re: How to 'copy' MethodDeclaration from one Co

[Eddie Man <superman_eddie@xxxxxxxxxxxx>]

Copying ast node from one AST to other:

MethodDeclaration method;
CompilationUnit other;
...
TypeDeclaration targetType = (TypeDeclaration) other.types.get(0);
targetType.bodyDeclarations().add(ASTNode.copySubtree(other.getAST(), 
method));

Werner Janjic wrote:
> Hello!
>
> I've got a problem in codeing a plugin. I've got a CompilationUnit 
> created from Javacode in a file on the filesystem and can wonderfully 
> traverse through it. Now I want to copy one method from this 
> CompilationUnit to another CompilationUnit that I've got from the actual 
> editor.
>
> So I did - naively - the following:
>
> [...]
> MethodDeclaration orgMethod = methods[0];
> ((TypeDeclaration)editorCompUnit.types().get(0)).bodyDeclarations().add(orgMethod); 
>
> [...]
>
> Unfortunately this returns an IllegalArgumentException and seeing the 
> inner structure in the debugger I assume that this is due to the fact 
> that orgMethod references its own AST and/or CPU and so the editor CPU 
> can't handle that.
>
> Now I'd like to know if there is a possibility to copy a method or type 
> declaration from one CompilationUnit to another one, without haveing to 
> code one million lines of code examining all of the original one and 
> then storing it in the destination CPU. That seems pretty hard to me as 
> I'm not so deep in AST/CPU programming. Is there some clone or copy 
> option implemented?
>
> Thank you in advance and I'd very much appreciate if you could provide 
> me some code snippet with your answer. I've been trying it myself for 
> days now and also searching the newsgroup and googleing didn't give me 
> any idea.
>
> Werner