001 /* 002 * SonarQube, open source software quality management tool. 003 * Copyright (C) 2008-2014 SonarSource 004 * mailto:contact AT sonarsource DOT com 005 * 006 * SonarQube is free software; you can redistribute it and/or 007 * modify it under the terms of the GNU Lesser General Public 008 * License as published by the Free Software Foundation; either 009 * version 3 of the License, or (at your option) any later version. 010 * 011 * SonarQube is distributed in the hope that it will be useful, 012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014 * Lesser General Public License for more details. 015 * 016 * You should have received a copy of the GNU Lesser General Public License 017 * along with this program; if not, write to the Free Software Foundation, 018 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 019 */ 020 package org.sonar.api.utils; 021 022 import java.io.IOException; 023 import java.net.URL; 024 import java.util.ArrayList; 025 import java.util.Enumeration; 026 import java.util.List; 027 import java.util.jar.Attributes; 028 import java.util.jar.Manifest; 029 030 /** 031 * @since 2.2 032 */ 033 public final class ManifestUtils { 034 035 private ManifestUtils() { 036 } 037 038 /** 039 * Search for a property in all the manifests found in the classloader 040 * 041 * @return the values, an empty list if the property is not found. 042 */ 043 public static List<String> getPropertyValues(ClassLoader classloader, String key) { 044 List<String> values = new ArrayList<String>(); 045 try { 046 Enumeration<URL> resources = classloader.getResources("META-INF/MANIFEST.MF"); 047 while (resources.hasMoreElements()) { 048 Manifest manifest = new Manifest(resources.nextElement().openStream()); 049 Attributes attributes = manifest.getMainAttributes(); 050 String value = attributes.getValue(key); 051 if (value != null) { 052 values.add(value); 053 } 054 } 055 } catch (IOException e) { 056 throw new SonarException("Fail to load manifests from classloader: " + classloader, e); 057 } 058 return values; 059 } 060 }