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 }
45 }