1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.commons.compress.utils;
19
20 /**
21 * Utilities for dealing with OSGi environments.
22 *
23 * @since 1.21
24 */
25 public class OsgiUtils {
26
27 private static final boolean inOsgiEnvironment;
28
29 static {
30 final ClassLoader classLoader = OsgiUtils.class.getClassLoader();
31 inOsgiEnvironment = classLoader != null ? isBundleReference(classLoader.getClass()) : false;
32 }
33
34 private static boolean isBundleReference(final Class<?> clazz) {
35 Class<?> c = clazz;
36 while (c != null) {
37 if (c.getName().equals("org.osgi.framework.BundleReference")) {
38 return true;
39 }
40 for (final Class<?> ifc : c.getInterfaces()) {
41 if (isBundleReference(ifc)) {
42 return true;
43 }
44 }
45 c = c.getSuperclass();
46 }
47 return false;
48 }
49
50 /**
51 * Tests if Commons Compress running as an OSGi bundle?
52 *
53 * @return true if Commons Compress running as an OSGi bundle.
54 */
55 public static boolean isRunningInOsgiEnvironment() {
56 return inOsgiEnvironment;
57 }
58
59 }