AST for current selected code in eclipse editor?

Question

I need to get the AST for the current selection in the java editor fo eclipse. Basically I want to convert the selected java code in to some other form(maybe some other lang

Answer 1

The following Code provides you the AST Node of the current selected Code from the CompilationUnitEditor.

        ITextEditor editor = (ITextEditor) HandlerUtil.getActiveEditor(event);
        ITextSelection sel  = (ITextSelection) editor.getSelectionProvider().getSelection();
        ITypeRoot typeRoot = JavaUI.getEditorInputTypeRoot(editor.getEditorInput());
        ICompilationUnit icu = (ICompilationUnit) typeRoot.getAdapter(ICompilationUnit.class);
        CompilationUnit cu = parse(icu);
        NodeFinder finder = new NodeFinder(cu, sel.getOffset(), sel.getLength());
        ASTNode node = finder.getCoveringNode();

The JavaUI is the entry point to the JDT UI plugin.