| /******************************************************************************* |
| * Copyright (c) 2000, 2005 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.ui.model; |
| |
| import org.eclipse.jface.viewers.ITreeContentProvider; |
| import org.eclipse.jface.viewers.Viewer; |
| import org.eclipse.ui.internal.util.Util; |
| |
| /** |
| * Tree content provider for objects that can be adapted to the interface |
| * {@link org.eclipse.ui.model.IWorkbenchAdapter IWorkbenchAdapter}. |
| * <p> |
| * This class may be instantiated, or subclassed. |
| * </p> |
| * |
| * @see IWorkbenchAdapter |
| * @since 3.0 |
| */ |
| public class BaseWorkbenchContentProvider implements ITreeContentProvider { |
| |
| /** |
| * Creates a new workbench content provider. |
| * |
| */ |
| public BaseWorkbenchContentProvider() { |
| super(); |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on IContentProvider. |
| */ |
| public void dispose() { |
| // do nothing |
| } |
| |
| /** |
| * Returns the implementation of IWorkbenchAdapter for the given |
| * object. Returns null if the adapter is not defined or the |
| * object is not adaptable. |
| * <p> |
| * </p> |
| * |
| * @param element the element |
| * @return the corresponding workbench adapter object |
| */ |
| protected IWorkbenchAdapter getAdapter(Object element) { |
| return (IWorkbenchAdapter)Util.getAdapter(element, IWorkbenchAdapter.class); |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on ITreeContentProvider. |
| */ |
| public Object[] getChildren(Object element) { |
| IWorkbenchAdapter adapter = getAdapter(element); |
| if (adapter != null) { |
| return adapter.getChildren(element); |
| } |
| return new Object[0]; |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on IStructuredContentProvider. |
| */ |
| public Object[] getElements(Object element) { |
| return getChildren(element); |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on ITreeContentProvider. |
| */ |
| public Object getParent(Object element) { |
| IWorkbenchAdapter adapter = getAdapter(element); |
| if (adapter != null) { |
| return adapter.getParent(element); |
| } |
| return null; |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on ITreeContentProvider. |
| */ |
| public boolean hasChildren(Object element) { |
| return getChildren(element).length > 0; |
| } |
| |
| /* (non-Javadoc) |
| * Method declared on IContentProvider. |
| */ |
| public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { |
| // do nothing |
| } |
| |
| } |