| /* |
| * 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.Collection; |
| import java.util.List; |
| |
| import org.apache.tools.ant.types.Resource; |
| import org.apache.tools.ant.util.CollectionUtils; |
| |
| /** |
| * ResourceCollection that contains all resources of another |
| * collection except for the last <code>count</code> elements, a la |
| * the UNIX head command with parameter <code>-n -count</code>. |
| * @since Ant 1.9.5 |
| */ |
| public class AllButLast extends SizeLimitCollection { |
| |
| /** |
| * Take all elements except for the last <code>count</code> elements. |
| * @return a Collection of Resources. |
| */ |
| protected Collection<Resource> getCollection() { |
| int ct = getValidCount(); |
| List<Resource> result = |
| (List<Resource>) CollectionUtils.asCollection(getResourceCollection() |
| .iterator()); |
| return result.subList(0, result.size() - ct); |
| } |
| |
| @Override |
| public synchronized int size() { |
| int sz = getResourceCollection().size(); |
| int ct = getValidCount(); |
| return sz > ct ? sz - ct : 0; |
| } |
| |
| } |