1 /*
2 * Copyright 2009 Red Hat, Inc.
3 *
4 * Red Hat licenses this file to you under the Apache License, version 2.0
5 * (the "License"); you may not use this file except in compliance with the
6 * 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 * @author <a href="http://www.jboss.org/netty/">The Netty Project</a>
23 * @author <a href="http://gleamynode.net/">Trustin Lee</a>
24 * @version $Rev: 2080 $, $Date: 2010-01-26 18:04:19 +0900 (Tue, 26 Jan 2010) $
25 */
26 public class ExternalResourceUtil {
27
28 /**
29 * Releases the specified {@link ExternalResourceReleasable}s.
30 */
31 public static void release(ExternalResourceReleasable... releasables) {
32 ExternalResourceReleasable[] releasablesCopy =
33 new ExternalResourceReleasable[releasables.length];
34
35 for (int i = 0; i < releasables.length; i ++) {
36 if (releasables[i] == null) {
37 throw new NullPointerException("releasables[" + i + "]");
38 }
39 releasablesCopy[i] = releasables[i];
40 }
41
42 for (ExternalResourceReleasable e: releasablesCopy) {
43 e.releaseExternalResources();
44 }
45 }
46
47 private ExternalResourceUtil() {
48 super();
49 }
50 }