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.batch.bootstrap;
021    
022    import org.apache.commons.lang.StringUtils;
023    import org.sonar.api.BatchExtension;
024    import org.sonar.api.batch.InstantiationStrategy;
025    import org.sonar.api.batch.SupportedEnvironment;
026    import org.sonar.api.utils.AnnotationUtils;
027    import org.sonar.batch.bootstrapper.EnvironmentInformation;
028    import org.sonar.core.DryRunIncompatible;
029    
030    public class ExtensionUtils {
031    
032      private ExtensionUtils() {
033        // only static methods
034      }
035    
036      public static boolean isInstantiationStrategy(Object extension, String strategy) {
037        InstantiationStrategy annotation = AnnotationUtils.getAnnotation(extension, InstantiationStrategy.class);
038        if (annotation != null) {
039          return strategy.equals(annotation.value());
040        }
041        return InstantiationStrategy.PER_PROJECT.equals(strategy);
042      }
043    
044      public static boolean isBatchExtension(Object extension) {
045        return isType(extension, BatchExtension.class);
046      }
047    
048      public static boolean supportsEnvironment(Object extension, EnvironmentInformation environment) {
049        SupportedEnvironment env = AnnotationUtils.getAnnotation(extension, SupportedEnvironment.class);
050        if (env == null) {
051          return true;
052        }
053        for (String supported : env.value()) {
054          if (StringUtils.equalsIgnoreCase(environment.getKey(), supported)) {
055            return true;
056          }
057        }
058        return false;
059      }
060    
061      public static boolean supportsPreview(Object extension) {
062        return AnnotationUtils.getAnnotation(extension, DryRunIncompatible.class) == null;
063      }
064    
065      public static boolean isMavenExtensionOnly(Object extension) {
066        SupportedEnvironment env = AnnotationUtils.getAnnotation(extension, SupportedEnvironment.class);
067        return env != null && env.value().length == 1 && StringUtils.equalsIgnoreCase("maven", env.value()[0]);
068      }
069    
070      public static boolean isType(Object extension, Class<?> extensionClass) {
071        Class clazz = extension instanceof Class ? (Class) extension : extension.getClass();
072        return extensionClass.isAssignableFrom(clazz);
073      }
074    }