package org.apache.maven.model.io;
   
   /*
    * 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.OutputStream;
  import java.io.OutputStreamWriter;
  import java.io.Writer;
  import java.util.Map;
  
  import org.apache.maven.model.Model;
  import org.apache.maven.model.io.xpp3.MavenXpp3Writer;
  import org.codehaus.plexus.component.annotations.Component;
  import org.codehaus.plexus.util.IOUtil;
  import org.codehaus.plexus.util.WriterFactory;
  
  /**
   * Handles serialization of a model into some kind of textual format like XML.
   *
   * @author Benjamin Bentmann
   */
  @Component( role = ModelWriter.class )
  public class DefaultModelWriter
      implements ModelWriter
  {
  
      @Override
      public void write( File output, Map<String, Object> options, Model model )
          throws IOException
      {
          if ( output == null )
          {
              throw new IllegalArgumentException( "output file missing" );
          }
  
          if ( model == null )
          {
              throw new IllegalArgumentException( "model missing" );
          }
  
          output.getParentFile().mkdirs();
  
          write( WriterFactory.newXmlWriter( output ), options, model );
      }
  
      @Override
      public void write( Writer output, Map<String, Object> options, Model model )
          throws IOException
      {
          if ( output == null )
          {
              throw new IllegalArgumentException( "output writer missing" );
          }
  
          if ( model == null )
          {
              throw new IllegalArgumentException( "model missing" );
          }
  
          try
          {
              MavenXpp3Writer w = new MavenXpp3Writer();
              w.write( output, model );
          }
          finally
          {
              IOUtil.close( output );
          }
      }
  
      @Override
      public void write( OutputStream output, Map<String, Object> options, Model model )
          throws IOException
      {
          if ( output == null )
          {
              throw new IllegalArgumentException( "output stream missing" );
          }
  
          if ( model == null )
          {
             throw new IllegalArgumentException( "model missing" );
         }
 
         try
         {
             String encoding = model.getModelEncoding();
             if ( encoding == null || encoding.length() <= 0 )
             {
                 encoding = "UTF-8";
             }
             write( new OutputStreamWriter( output, encoding ), options, model );
         }
         finally
         {
             IOUtil.close( output );
         }
     }
 
 }