|
Ant example source code file (Union.java)
The Union.java source code/* * 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.List; import java.util.Iterator; import java.util.ArrayList; import java.util.Collection; import java.util.Collections; 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() { } /** * Convenience constructor. * @param rc the ResourceCollection to add. */ public Union(ResourceCollection rc) { 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 ((Union) getCheckedRef()).list(); } Collection result = getCollection(true); return (String[]) (result.toArray(new String[result.size()])); } /** * Convenience method. * @return Resource[] */ public Resource[] listResources() { if (isReference()) { return ((Union) getCheckedRef()).listResources(); } Collection result = getCollection(); return (Resource[]) (result.toArray(new Resource[result.size()])); } /** * Unify the contained Resources. * @return a Collection of Resources. */ protected Collection getCollection() { return getCollection(false); } /** * Unify the contained Resources. * @param asString indicates whether the resulting Collection * should contain Strings instead of Resources. * @return a Collection of Resources. */ protected Collection getCollection(boolean asString) { List rc = getResourceCollections(); if (rc.isEmpty()) { return Collections.EMPTY_LIST; } //preserve order-encountered using a list; enforce set logic manually: ArrayList union = new ArrayList(rc.size() * 2); for (Iterator rcIter = rc.iterator(); rcIter.hasNext();) { for (Iterator r = nextRC(rcIter).iterator(); r.hasNext();) { Object o = r.next(); if (asString) { o = o.toString(); } if (!(union.contains(o))) { union.add(o); } } } return union; } private static ResourceCollection nextRC(Iterator i) { return (ResourceCollection) i.next(); } } Other Ant examples (source code examples)Here is a short list of links related to this Ant Union.java source code file: |
... this post is sponsored by my books ... | |
#1 New Release! |
FP Best Seller |
Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.
A percentage of advertising revenue from
pages under the /java/jwarehouse
URI on this website is
paid back to open source projects.