1 /* 2 * Copyright 2012 The Netty Project 3 * 4 * The Netty Project licenses this file to you under the Apache License, 5 * version 2.0 (the "License"); you may not use this file except in compliance 6 * with the License. You may obtain a copy of the License at: 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 13 * License for the specific language governing permissions and limitations 14 * under the License. 15 */ 16 package org.jboss.netty.util; 17 18 /** 19 * A utility class that provides the convenient shutdown of 20 * {@link ExternalResourceReleasable}s. 21 */ 22 public final class ExternalResourceUtil { 23 24 /** 25 * Releases the specified {@link ExternalResourceReleasable}s. 26 */ 27 public static void release(ExternalResourceReleasable... releasables) { 28 ExternalResourceReleasable[] releasablesCopy = 29 new ExternalResourceReleasable[releasables.length]; 30 31 for (int i = 0; i < releasables.length; i ++) { 32 if (releasables[i] == null) { 33 throw new NullPointerException("releasables[" + i + "]"); 34 } 35 releasablesCopy[i] = releasables[i]; 36 } 37 38 for (ExternalResourceReleasable e: releasablesCopy) { 39 e.releaseExternalResources(); 40 } 41 } 42 43 private ExternalResourceUtil() { 44 super(); 45 } 46 }