| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| package org.apache.tools.ant.types.resources; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.LinkedHashSet; |
| import java.util.List; |
| import java.util.Set; |
| |
| import org.apache.tools.ant.Project; |
| import org.apache.tools.ant.types.Resource; |
| import org.apache.tools.ant.types.ResourceCollection; |
| |
| /** |
| * ResourceCollection representing the union of multiple nested ResourceCollections. |
| * @since Ant 1.7 |
| */ |
| public class Union extends BaseResourceCollectionContainer { |
| |
| /** |
| * Static convenience method to union an arbitrary set of Resources. |
| * @param rc a ResourceCollection. |
| * @return a Union. |
| */ |
| public static Union getInstance(ResourceCollection rc) { |
| return rc instanceof Union ? (Union) rc : new Union(rc); |
| } |
| |
| /** |
| * Default constructor. |
| */ |
| public Union() { |
| } |
| |
| /** |
| * Create a new Union. |
| * @param project owning Project |
| */ |
| public Union(Project project) { |
| super(project); |
| } |
| |
| /** |
| * Convenience constructor. |
| * @param rc the ResourceCollection to add. |
| */ |
| public Union(ResourceCollection rc) { |
| this(Project.getProject(rc), rc); |
| } |
| |
| /** |
| * Convenience constructor. |
| * @param project owning Project |
| * @param rc the ResourceCollection to add. |
| */ |
| public Union(Project project, ResourceCollection rc) { |
| super(project); |
| add(rc); |
| } |
| |
| /** |
| * Returns all Resources in String format. Provided for |
| * convenience in implementing Path. |
| * @return String array of Resources. |
| */ |
| public String[] list() { |
| if (isReference()) { |
| return getCheckedRef(Union.class, getDataTypeName()).list(); |
| } |
| final Collection<String> result = getAllToStrings(); |
| return result.toArray(new String[result.size()]); |
| } |
| |
| /** |
| * Convenience method. |
| * @return Resource[] |
| */ |
| public Resource[] listResources() { |
| if (isReference()) { |
| return getCheckedRef(Union.class, getDataTypeName()).listResources(); |
| } |
| final Collection<Resource> result = getAllResources(); |
| return result.toArray(new Resource[result.size()]); |
| } |
| |
| /** |
| * Unify the contained Resources. |
| * @return a Collection of Resources. |
| */ |
| protected Collection<Resource> getCollection() { |
| return getAllResources(); |
| } |
| |
| /** |
| * Unify the contained Resources. |
| * @param <T> resource type |
| * @param asString indicates whether the resulting Collection |
| * should contain Strings instead of Resources. |
| * @return a Collection of Resources. |
| */ |
| @Deprecated |
| @SuppressWarnings("unchecked") |
| protected <T> Collection<T> getCollection(boolean asString) { // TODO untypable |
| return asString ? (Collection<T>) getAllToStrings() : (Collection<T>) getAllResources(); |
| } |
| |
| /** |
| * Get a collection of strings representing the unified resource set (strings may duplicate). |
| * @return Collection<String> |
| */ |
| protected Collection<String> getAllToStrings() { |
| final Set<Resource> allResources = getAllResources(); |
| final ArrayList<String> result = new ArrayList<String>(allResources.size()); |
| for (Resource r : allResources) { |
| result.add(r.toString()); |
| } |
| return result; |
| } |
| |
| /** |
| * Get the unified set of contained Resources. |
| * @return Set<Resource> |
| */ |
| protected Set<Resource> getAllResources() { |
| final List<ResourceCollection> resourceCollections = getResourceCollections(); |
| if (resourceCollections.isEmpty()) { |
| return Collections.emptySet(); |
| } |
| final LinkedHashSet<Resource> result = new LinkedHashSet<Resource>( |
| resourceCollections.size() * 2); |
| for (ResourceCollection resourceCollection : resourceCollections) { |
| for (Resource r : resourceCollection) { |
| result.add(r); |
| } |
| } |
| return result; |
| } |
| |
| } |
| |