| /* |
| * 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.Iterator; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| |
| import org.apache.tools.ant.types.Resource; |
| import org.apache.tools.ant.types.ResourceCollection; |
| import org.apache.tools.ant.types.resources.selectors.ResourceSelector; |
| import org.apache.tools.ant.types.resources.selectors.ResourceSelectorContainer; |
| |
| /** |
| * ResourceCollection that allows a number of selectors to be |
| * applied to a single ResourceCollection for the purposes of |
| * restricting or narrowing results. |
| * @since Ant 1.7 |
| */ |
| public class Restrict |
| extends ResourceSelectorContainer implements ResourceCollection { |
| |
| private BaseResourceCollectionWrapper w = new BaseResourceCollectionWrapper() { |
| /** |
| * Restrict the nested ResourceCollection based on the nested selectors. |
| * @return a Collection of Resources. |
| */ |
| protected Collection getCollection() { |
| ArrayList result = new ArrayList(); |
| outer: for (Iterator ri = w.getResourceCollection().iterator(); ri.hasNext();) { |
| Resource r = (Resource) ri.next(); |
| for (Iterator i = getSelectors(); i.hasNext();) { |
| if (!((ResourceSelector) (i.next())).isSelected(r)) { |
| continue outer; |
| } |
| } |
| result.add(r); |
| } |
| return result; |
| } |
| }; |
| |
| /** |
| * Add the ResourceCollection. |
| * @param c the ResourceCollection to add. |
| */ |
| public synchronized void add(ResourceCollection c) { |
| if (isReference()) { |
| throw noChildrenAllowed(); |
| } |
| if (c == null) { |
| return; |
| } |
| w.add(c); |
| } |
| |
| /** |
| * Set whether to cache collections. |
| * @param b boolean cache flag. |
| */ |
| public synchronized void setCache(boolean b) { |
| w.setCache(b); |
| } |
| |
| /** |
| * Learn whether to cache collections. Default is <code>true</code>. |
| * @return boolean cache flag. |
| */ |
| public synchronized boolean isCache() { |
| return w.isCache(); |
| } |
| |
| /** |
| * Add a ResourceSelector. |
| * @param s the ResourceSelector to add. |
| */ |
| public synchronized void add(ResourceSelector s) { |
| if (s == null) { |
| return; |
| } |
| super.add(s); |
| FailFast.invalidate(this); |
| } |
| |
| /** |
| * Fulfill the ResourceCollection contract. |
| * @return an Iterator of Resources. |
| */ |
| public final synchronized Iterator iterator() { |
| if (isReference()) { |
| return ((Restrict) getCheckedRef()).iterator(); |
| } |
| dieOnCircularReference(); |
| return w.iterator(); |
| } |
| |
| /** |
| * Fulfill the ResourceCollection contract. |
| * @return number of elements as int. |
| */ |
| public synchronized int size() { |
| if (isReference()) { |
| return ((Restrict) getCheckedRef()).size(); |
| } |
| dieOnCircularReference(); |
| return w.size(); |
| } |
| |
| /** |
| * Fulfill the ResourceCollection contract. |
| * @return whether this is a filesystem-only resource collection. |
| */ |
| public synchronized boolean isFilesystemOnly() { |
| if (isReference()) { |
| return ((Restrict) getCheckedRef()).isFilesystemOnly(); |
| } |
| dieOnCircularReference(); |
| return w.isFilesystemOnly(); |
| } |
| |
| /** |
| * Format this Restrict collection as a String. |
| * @return the String value of this collection. |
| */ |
| public synchronized String toString() { |
| if (isReference()) { |
| return getCheckedRef().toString(); |
| } |
| dieOnCircularReference(); |
| return w.toString(); |
| } |
| |
| } |