package org.apache.maven.plugins.war.packaging;
   
   /*
    * 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.Artifact;
  import org.apache.maven.artifact.factory.ArtifactFactory;
  import org.apache.maven.plugin.MojoExecutionException;
  import org.apache.maven.plugins.war.Overlay;
  import org.apache.maven.plugins.war.util.ClassesPackager;
  import org.apache.maven.plugins.war.util.PathSet;
  import org.apache.maven.project.MavenProject;
  import org.codehaus.plexus.interpolation.InterpolationException;
  
  import java.io.File;
  import java.io.IOException;
  
  /**
   * Handles the classes directory that needs to be packaged in the web application.
   * 
   * Based on the {@link WarPackagingContext#archiveClasses()} flag, the resources are either copied into to
   * <tt>WEB-INF/classes</tt> directory or archived in a jar within the <tt>WEB-INF/lib</tt> directory.
   *
   * @author Stephane Nicoll
   */
  public class ClassesPackagingTask
      extends AbstractWarPackagingTask
  {
      private final Overlay currentProjectOverlay;
  
      /**
       * @param currentProjectOverlay {@link #currentProjectOverlay}
       */
      public ClassesPackagingTask( Overlay currentProjectOverlay )
      {
          this.currentProjectOverlay = currentProjectOverlay;
      }
  
      @Override
      public void performPackaging( WarPackagingContext context )
          throws MojoExecutionException
      {
          final File webappClassesDirectory = new File( context.getWebappDirectory(), CLASSES_PATH );
          if ( !webappClassesDirectory.exists() )
          {
              webappClassesDirectory.mkdirs();
          }
  
          if ( context.getClassesDirectory().exists() && !context.getClassesDirectory().equals( webappClassesDirectory ) )
          {
              if ( context.archiveClasses() )
              {
                  generateJarArchive( context );
              }
              else
              {
                  final PathSet sources = getFilesToIncludes( context.getClassesDirectory(), null, null );
                  try
                  {
                      copyFiles( currentProjectOverlay.getId(), context, context.getClassesDirectory(), sources,
                                 CLASSES_PATH, false );
                  }
                  catch ( IOException e )
                  {
                      throw new MojoExecutionException( "Could not copy webapp classes ["
                          + context.getClassesDirectory().getAbsolutePath() + "]", e );
                  }
              }
          }
      }
  
      /**
       * @param context The warPackingContext.
       * @throws MojoExecutionException In case of an error.
       */
      protected void generateJarArchive( WarPackagingContext context )
          throws MojoExecutionException
      {
          MavenProject project = context.getProject();
          ArtifactFactory factory = context.getArtifactFactory();
          Artifact artifact =
              factory.createBuildArtifact( project.getGroupId(), project.getArtifactId(), project.getVersion(), "jar" );
          String archiveName;
         try
         {
             archiveName = getArtifactFinalName( context, artifact );
         }
         catch ( InterpolationException e )
         {
             throw new MojoExecutionException( "Could not get the final name of the artifact [" + artifact.getGroupId()
                 + ":" + artifact.getArtifactId() + ":" + artifact.getVersion() + "]", e );
         }
         final String targetFilename = LIB_PATH + archiveName;
 
         if ( context.getWebappStructure().registerFile( currentProjectOverlay.getId(), targetFilename ) )
         {
             context.addResource( targetFilename );
 
             final File libDirectory = new File( context.getWebappDirectory(), LIB_PATH );
             final File jarFile = new File( libDirectory, archiveName );
             final ClassesPackager packager = new ClassesPackager();
             packager.packageClasses( context.getClassesDirectory(), jarFile, context.getJarArchiver(),
                                      context.getSession(), project, context.getArchive(),
                                      context.getOutputTimestamp() );
         }
         else
         {
             context.getLog().warn( "Could not generate archive classes file [" + targetFilename
                                        + "] has already been copied." );
         }
     }
 }