| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.aries.rsa.core; |
| |
| import org.osgi.framework.Bundle; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.ServiceReference; |
| import org.osgi.service.packageadmin.ExportedPackage; |
| import org.osgi.service.packageadmin.PackageAdmin; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| @SuppressWarnings("deprecation") |
| public class PackageUtil { |
| |
| public static final Logger LOG = LoggerFactory.getLogger(PackageUtil.class); |
| private BundleContext bc; |
| |
| public PackageUtil(BundleContext bc) { |
| this.bc = bc; |
| } |
| |
| /** |
| * Tries to retrieve the version of iClass via the PackageAdmin. |
| * |
| * @param iClass tThe interface for which the version should be found |
| * @return the version of the interface or "0.0.0" if no version information could be found or an error |
| * occurred during the retrieval |
| */ |
| public String getVersion(Class<?> iClass) { |
| ServiceReference<PackageAdmin> paRef = bc.getServiceReference(PackageAdmin.class); |
| if (paRef != null) { |
| PackageAdmin pa = bc.getService(paRef); |
| try { |
| Bundle b = pa.getBundle(iClass); |
| if (b == null) { |
| LOG.info("Unable to find interface version for interface " + iClass.getName() |
| + ". Falling back to 0.0.0"); |
| return "0.0.0"; |
| } |
| LOG.debug("Interface source bundle: {}", b.getSymbolicName()); |
| |
| ExportedPackage[] ep = pa.getExportedPackages(b); |
| LOG.debug("Exported Packages of the source bundle: {}", (Object)ep); |
| |
| String pack = iClass.getPackage().getName(); |
| LOG.debug("Looking for Package: {}", pack); |
| if (ep != null) { |
| for (ExportedPackage p : ep) { |
| if (p != null |
| && pack.equals(p.getName())) { |
| LOG.debug("found package -> Version: {}", p.getVersion()); |
| return p.getVersion().toString(); |
| } |
| } |
| } |
| } finally { |
| if (pa != null) { |
| bc.ungetService(paRef); |
| } |
| } |
| } else { |
| LOG.error("Was unable to obtain the package admin service -> can't resolve interface versions"); |
| } |
| |
| LOG.info("Unable to find interface version for interface " + iClass.getName() |
| + ". Falling back to 0.0.0"); |
| return "0.0.0"; |
| } |
| } |