package org.codehaus.mojo.javascript;
   
   /*
    * Copyright 2001-2005 The Apache Software Foundation.
    *
    * Licensed 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 java.io.File;
  import java.util.Map;
  
  import org.apache.maven.artifact.Artifact;
  import org.apache.maven.plugin.AbstractMojo;
  import org.apache.maven.plugin.MojoExecutionException;
  import org.codehaus.mojo.javascript.archive.JavascriptArtifactManager;
  import org.codehaus.plexus.archiver.ArchiverException;
  
  /**
   * @author <a href="mailto:nicolas@apache.org">Nicolas De Loof</a>
   */
  public abstract class AbstractJavascriptMojo
      extends AbstractMojo
  {
  
      /**
       * Map of of plugin artifacts.
       * 
       * @parameter expression="${plugin.artifactMap}"
       * @required
       * @readonly
       */
      private Map pluginArtifactMap;
  
      /**
       * @component 
       */
      private JavascriptArtifactManager javascriptArtifactManager;
  
      /**
       * Unpack a javascript dependency
       */
      protected void unpackJavascriptDependency( String artifact, File dest )
          throws MojoExecutionException
      {
          if ( !pluginArtifactMap.containsKey( artifact ) )
          {
              throw new MojoExecutionException( "Failed to resolve dependency " + artifact
                  + " required by the plugin" );
          }
          Artifact javascript = (Artifact) pluginArtifactMap.get( artifact );
  
          try
          {
              javascriptArtifactManager.unpack( javascript, dest );
          }
          catch ( ArchiverException e )
          {
              throw new MojoExecutionException( "Failed to unpack javascript dependency " + artifact,
                  e );
          }
      }
  
  }