1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * https://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19
20 package org.apache.commons.compress.utils;
21
22 /**
23 * Utilities for dealing with OSGi environments.
24 *
25 * @since 1.21
26 */
27 public class OsgiUtils {
28
29 private static final boolean inOsgiEnvironment;
30
31 static {
32 final ClassLoader classLoader = OsgiUtils.class.getClassLoader();
33 inOsgiEnvironment = classLoader != null && isBundleReference(classLoader.getClass());
34 }
35
36 private static boolean isBundleReference(final Class<?> clazz) {
37 Class<?> c = clazz;
38 while (c != null) {
39 if (c.getName().equals("org.osgi.framework.BundleReference")) {
40 return true;
41 }
42 for (final Class<?> ifc : c.getInterfaces()) {
43 if (isBundleReference(ifc)) {
44 return true;
45 }
46 }
47 c = c.getSuperclass();
48 }
49 return false;
50 }
51
52 /**
53 * Tests if Commons Compress running as an OSGi bundle?
54 *
55 * @return true if Commons Compress running as an OSGi bundle.
56 */
57 public static boolean isRunningInOsgiEnvironment() {
58 return inOsgiEnvironment;
59 }
60
61 }