Bug 94810 Generate Delegate Methods for multiple fields problem
I20050509-2010 In the CU below: - invoke Generate Delegate Methods - choose equals() from a and hashCode() from b - generate -> two delegate methods for a "class C { Object a; Object b; } "
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/actions/AddDelegateMethodsAction.java
* Note: This constructor is for internal use only. Clients should not call this
	 * constructor.
	 * 
	 * @param editor the compilation unit editor
	 */
	public AddDelegateMethodsAction(CompilationUnitEditor editor) {
		this(editor.getEditorSite());
		fEditor= editor;
		setEnabled(SelectionConverter.getInputAsCompilationUnit(editor) != null);
	}
	/**
	 * Creates a new <code>AddDelegateMethodsAction</code>. The action requires that
	 * the selection provided by the site's selection provider is of type <code>
	 * org.eclipse.jface.viewers.IStructuredSelection</code>.
	 * 
	 * @param site the site providing context information for this action
	 */
	public AddDelegateMethodsAction(IWorkbenchSite site) {
		super(site);
		setText(ActionMessages.AddDelegateMethodsAction_label); 
		setDescription(ActionMessages.AddDelegateMethodsAction_description); 
		setToolTipText(ActionMessages.AddDelegateMethodsAction_tooltip); 
		PlatformUI.getWorkbench().getHelpSystem().setHelp(this, IJavaHelpContextIds.ADD_DELEGATE_METHODS_ACTION);
	}
	private boolean canEnable(IStructuredSelection selection) throws JavaModelException {
		if (getSelectedFields(selection) != null)
			return true;
		if ((selection.size() == 1) && (selection.getFirstElement() instanceof IType)) {
			IType type= (IType) selection.getFirstElement();
			return type.getCompilationUnit() != null && !type.isInterface();