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.FileInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.Reader;
  import java.util.Map;
  
  import org.apache.maven.model.InputSource;
  import org.apache.maven.model.Model;
  import org.apache.maven.model.io.xpp3.MavenXpp3Reader;
  import org.apache.maven.model.io.xpp3.MavenXpp3ReaderEx;
  import org.codehaus.plexus.component.annotations.Component;
  import org.codehaus.plexus.util.IOUtil;
  import org.codehaus.plexus.util.ReaderFactory;
  import org.codehaus.plexus.util.xml.pull.XmlPullParserException;
  
  /**
   * Handles deserialization of a model from some kind of textual format like XML.
   *
   * @author Benjamin Bentmann
   */
  @Component( role = ModelReader.class )
  public class DefaultModelReader
      implements ModelReader
  {
  
      @Override
      public Model read( File input, Map<String, ?> options )
          throws IOException
      {
          if ( input == null )
          {
              throw new IllegalArgumentException( "input file missing" );
          }
  
          Model model = read( new FileInputStream( input ), options );
  
          model.setPomFile( input );
  
          return model;
      }
  
      @Override
      public Model read( Reader input, Map<String, ?> options )
          throws IOException
      {
          if ( input == null )
          {
              throw new IllegalArgumentException( "input reader missing" );
          }
  
          try
          {
              return read( input, isStrict( options ), getSource( options ) );
          }
          finally
          {
              IOUtil.close( input );
          }
      }
  
      @Override
      public Model read( InputStream input, Map<String, ?> options )
          throws IOException
      {
          if ( input == null )
          {
              throw new IllegalArgumentException( "input stream missing" );
          }
  
          try
          {
              return read( ReaderFactory.newXmlReader( input ), isStrict( options ), getSource( options ) );
          }
          finally
          {
              IOUtil.close( input );
          }
     }
 
     private boolean isStrict( Map<String, ?> options )
     {
         Object value = ( options != null ) ? options.get( IS_STRICT ) : null;
         return value == null || Boolean.parseBoolean( value.toString() );
     }
 
     private InputSource getSource( Map<String, ?> options )
     {
         Object value = ( options != null ) ? options.get( INPUT_SOURCE ) : null;
         return (InputSource) value;
     }
 
     private Model read( Reader reader, boolean strict, InputSource source )
         throws IOException
     {
         try
         {
             if ( source != null )
             {
                 return new MavenXpp3ReaderEx().read( reader, strict, source );
             }
             else
             {
                 return new MavenXpp3Reader().read( reader, strict );
             }
         }
         catch ( XmlPullParserException e )
         {
             throw new ModelParseException( e.getMessage(), e.getLineNumber(), e.getColumnNumber(), e );
         }
     }
 
 }