package org.apache.maven.artifact.ant;
   
   /*
    * 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 java.io.File;
  import java.io.IOException;
  import java.io.Writer;
  
  import org.apache.maven.model.Model;
  import org.apache.maven.model.io.xpp3.MavenXpp3Writer;
  import org.apache.tools.ant.BuildException;
  import org.apache.tools.ant.Task;
  import org.codehaus.plexus.util.IOUtil;
  import org.codehaus.plexus.util.WriterFactory;
  
  /**
   * Write a POM to a file.
   *
   * @since 2.1.0
   */
  public class WritePomTask
      extends Task
  {
      private String pomRefId;
  
      private File file;
  
      private boolean trim = true;
  
      public void execute()
      {
          // check valid configuration
          Pom pom = (Pom) getProject().getReference( pomRefId );
          Model model = pom.getModel();
          if ( trim )
          {
              trimModel ( model );
          }
          writeModel( model, file );
      }
  
      /**
       * Removes a lot of unnecessary information from the POM.
       * This includes the build section, reporting, repositories, etc.
       */
      public void trimModel( Model model )
      {
          model.setBuild( null );
          model.setReporting( null );
          model.setProperties( null );
          model.setRepositories( null );
          model.setPluginRepositories( null );
          model.setProfiles( null );
          model.setDistributionManagement( null );
          model.setModules( null );
      }
  
      /**
       * Write a POM model to a file
       *
       * @param model
       * @return
       * @throws MojoExecutionException
       */
      public void writeModel( Model model, File outputFile )
          throws BuildException
      {
          Writer fw = null;
          try
          {
              fw = WriterFactory.newXmlWriter( outputFile );
              new MavenXpp3Writer().write( fw, model );
          }
          catch ( IOException e )
          {
              throw new BuildException( "Error writing temporary pom file: " + e.getMessage(), e );
          }
          finally
          {
              IOUtil.close( fw );
          }
      }
 
     public void setPomRefId( String pomRefId )
     {
         this.pomRefId = pomRefId;
     }
 
     public String getPomRefId()
     {
         return pomRefId;
     }
 
     public void setFile( File file )
     {
         this.file = file;
     }
 
     public File getFile()
     {
         return file;
     }
 
     public void setTrim( boolean trim )
     {
         this.trim = trim;
     }
 
     public boolean isTrim()
     {
         return trim;
     }
 }