| /* |
| * 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 org.apache.tools.ant.BuildException; |
| |
| /** |
| * ResourceCollection that imposes a size limit on another ResourceCollection. |
| * @since Ant 1.7.1 |
| */ |
| public abstract class SizeLimitCollection extends BaseResourceCollectionWrapper { |
| private static final String BAD_COUNT |
| = "size-limited collection count should be set to an int >= 0"; |
| |
| private int count = 1; |
| |
| /** |
| * Set the number of resources to be included. |
| * @param i the count as <code>int</count>. |
| */ |
| public synchronized void setCount(int i) { |
| count = i; |
| } |
| |
| /** |
| * Get the number of resources to be included. Default is 1. |
| * @return the count as <code>int</count>. |
| */ |
| public synchronized int getCount() { |
| return count; |
| } |
| |
| /** |
| * Efficient size implementation. |
| * @return int size |
| */ |
| public synchronized int size() { |
| int sz = getResourceCollection().size(); |
| int ct = getValidCount(); |
| return sz < ct ? sz : ct; |
| } |
| |
| /** |
| * Get the count, verifying it is >= 0. |
| * @return int count |
| */ |
| protected int getValidCount() { |
| int ct = getCount(); |
| if (ct < 0) { |
| throw new BuildException(BAD_COUNT); |
| } |
| return ct; |
| } |
| |
| } |