diff options
Diffstat (limited to 'framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/Union.java')
-rw-r--r-- | framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/Union.java | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/Union.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/Union.java new file mode 100644 index 00000000..e2f2f9f2 --- /dev/null +++ b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/types/resources/Union.java @@ -0,0 +1,156 @@ +/* + * 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 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; + } + +} + |