| /******************************************************************************* |
| * Copyright (c) 2000, 2006 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.views.navigator; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.eclipse.core.resources.IResource; |
| import org.eclipse.core.runtime.IAdaptable; |
| import org.eclipse.jface.viewers.IStructuredSelection; |
| import org.eclipse.jface.viewers.StructuredSelection; |
| |
| /** |
| * Provides utilities for checking the validity of selections. |
| * <p> |
| * This class provides static methods only; it is not intended to be instantiated |
| * or subclassed. |
| * @since 2.0 |
| * </p> |
| */ |
| public class ResourceSelectionUtil { |
| /* (non-Javadoc) |
| * Private constructor to block instantiation. |
| */ |
| private ResourceSelectionUtil() { |
| } |
| |
| /** |
| * Returns whether the types of the resources in the given selection are among |
| * the specified resource types. |
| * |
| * @param selection the selection |
| * @param resourceMask resource mask formed by bitwise OR of resource type |
| * constants (defined on <code>IResource</code>) |
| * @return <code>true</code> if all selected elements are resources of the right |
| * type, and <code>false</code> if at least one element is either a resource |
| * of some other type or a non-resource |
| * @see IResource#getType() |
| */ |
| public static boolean allResourcesAreOfType(IStructuredSelection selection, |
| int resourceMask) { |
| Iterator resources = selection.iterator(); |
| while (resources.hasNext()) { |
| Object next = resources.next(); |
| if (!(next instanceof IResource)) { |
| return false; |
| } |
| if (!resourceIsType((IResource) next, resourceMask)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| /** |
| * Returns the selection adapted to IResource. Returns null |
| * if any of the entries are not adaptable. |
| * |
| * @param selection the selection |
| * @param resourceMask resource mask formed by bitwise OR of resource type |
| * constants (defined on <code>IResource</code>) |
| * @return IStructuredSelection or null if any of the entries are not adaptable. |
| * @see IResource#getType() |
| */ |
| public static IStructuredSelection allResources( |
| IStructuredSelection selection, int resourceMask) { |
| Iterator adaptables = selection.iterator(); |
| List result = new ArrayList(); |
| while (adaptables.hasNext()) { |
| Object next = adaptables.next(); |
| if (next instanceof IAdaptable) { |
| Object resource = ((IAdaptable) next) |
| .getAdapter(IResource.class); |
| if (resource == null) { |
| return null; |
| } else if (resourceIsType((IResource) resource, resourceMask)) { |
| result.add(resource); |
| } |
| } else { |
| return null; |
| } |
| } |
| return new StructuredSelection(result); |
| |
| } |
| |
| /** |
| * Returns whether the type of the given resource is among the specified |
| * resource types. |
| * |
| * @param resource the resource |
| * @param resourceMask resource mask formed by bitwise OR of resource type |
| * constants (defined on <code>IResource</code>) |
| * @return <code>true</code> if the resources has a matching type, and |
| * <code>false</code> otherwise |
| * @see IResource#getType() |
| */ |
| public static boolean resourceIsType(IResource resource, int resourceMask) { |
| return (resource.getType() & resourceMask) != 0; |
| } |
| |
| } |