package org.apache.maven.plugins.site;
   
   /*
    * 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.
   */
  
  import org.apache.maven.artifact.repository.ArtifactRepository;
  import org.apache.maven.artifact.versioning.ComparableVersion;
  import org.apache.maven.doxia.tools.SiteTool;
  import org.apache.maven.plugin.AbstractMojo;
  import org.apache.maven.plugins.annotations.Component;
  import org.apache.maven.plugins.annotations.Parameter;
  import org.apache.maven.project.MavenProject;
  import org.codehaus.plexus.i18n.I18N;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.util.List;
  import java.util.Locale;
  import java.util.Properties;
  
  /**
   * Base class for site mojos.
   *
   * @author <a href="mailto:brett@apache.org">Brett Porter</a>
   */
  public abstract class AbstractSiteMojo
      extends AbstractMojo
  {
      /**
       * A comma separated list of locales to render. The first valid token will be the default Locale
       * for this site.
       *
       * @since 2.3
       */
      @Parameter( property = "locales", defaultValue = "en" )
      private String locales;
  
      /**
       * Set this to 'true' to skip site generation and staging.
       *
       * @since 3.0
       */
      @Parameter( property = "maven.site.skip", defaultValue = "false" )
      protected boolean skip;
  
      /**
       * SiteTool.
       */
      @Component
      protected SiteTool siteTool;
  
      /**
       * Internationalization.
       */
      @Component
      protected I18N i18n;
  
      /**
       * The Maven project.
       */
      @Parameter( defaultValue = "${project}", readonly = true )
      protected MavenProject project;
  
      /**
       * The local repository.
       */
      @Parameter( defaultValue = "${localRepository}", readonly = true )
      protected ArtifactRepository localRepository;
  
      /**
       * The reactor projects.
       */
      @Parameter( defaultValue = "${reactorProjects}", required = true, readonly = true )
      protected List<MavenProject> reactorProjects;
  
      /**
       * Check the current Maven version to see if it's Maven 3.0 or newer.
       */
      protected static boolean isMaven3OrMore()
      {
          return new ComparableVersion( getMavenVersion() ).compareTo( new ComparableVersion( "3.0" ) ) >= 0;
      }
  
     protected static String getMavenVersion()
     {
         // This relies on the fact that MavenProject is the in core classloader
         // and that the core classloader is for the maven-core artifact
         // and that should have a pom.properties file
         // if this ever changes, we will have to revisit this code.
         final Properties properties = new Properties();
         final String corePomProperties = "META-INF/maven/org.apache.maven/maven-core/pom.properties";
 
         try ( InputStream in = MavenProject.class.getClassLoader().getResourceAsStream( corePomProperties ) )
         {
             properties.load( in );
         }
         catch ( IOException ioe )
         {
             return "";
         }
 
         return properties.getProperty( "version" ).trim();
     }
 
     protected List<Locale> getLocales()
     {
         return siteTool.getSiteLocales( locales );
     }
 }