001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 * 017 */ 018 019package org.apache.commons.compress.utils; 020 021/** 022 * Utilities for dealing with OSGi environments. 023 * 024 * @since 1.21 025 */ 026public class OsgiUtils { 027 028 private static final boolean inOsgiEnvironment; 029 030 static { 031 final Class<?> classloaderClass = OsgiUtils.class.getClassLoader().getClass(); 032 inOsgiEnvironment = isBundleReference(classloaderClass); 033 } 034 035 private static boolean isBundleReference(final Class<?> clazz) { 036 Class<?> c = clazz; 037 while (c != null) { 038 if (c.getName().equals("org.osgi.framework.BundleReference")) { 039 return true; 040 } 041 for (Class<?> ifc : c.getInterfaces()) { 042 if (isBundleReference(ifc)) { 043 return true; 044 } 045 } 046 c = c.getSuperclass(); 047 } 048 return false; 049 } 050 051 /** 052 * Tests if Commons Compress running as an OSGi bundle? 053 * @return true if Commons Compress running as an OSGi bundle. 054 */ 055 public static boolean isRunningInOsgiEnvironment() { 056 return inOsgiEnvironment; 057 } 058 059}