package org.apache.maven.doxia.sink.impl;
   
   /*
    * 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.ByteArrayOutputStream;
  import java.io.File;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import java.io.OutputStream;
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.maven.doxia.logging.Log;
  import org.apache.maven.doxia.sink.Sink;
  import org.apache.maven.doxia.sink.SinkEventAttributes;
  import org.apache.maven.doxia.sink.SinkFactory;
  
  /**
   * The RandomAccessSink provides the ability to create a {@link Sink} with hooks.
   * A page can be prepared by first creating its structure and specifying the positions of these hooks.
   * After specifying the structure, the page can be filled with content from one or more models.
   * These hooks can prevent you to have to loop over the model multiple times to build the page as desired. 
   * 
   * @author Robert Scholte
   * @since 1.3
   */
  public class RandomAccessSink
      implements Sink
  {
      private SinkFactory sinkFactory;
  
      private String encoding;
  
      private OutputStream coreOutputStream;
  
      private Sink coreSink;
  
      private List<Sink> sinks = new ArrayList<Sink>();
  
      private List<ByteArrayOutputStream> outputStreams = new ArrayList<ByteArrayOutputStream>();
  
      private Sink currentSink;
  
      public RandomAccessSink( SinkFactory sinkFactory, OutputStream stream )
          throws IOException
      {
          this.sinkFactory = sinkFactory;
          this.coreOutputStream = stream;
          this.currentSink = sinkFactory.createSink( stream );
          this.coreSink = this.currentSink;
      }
  
      public RandomAccessSink( SinkFactory sinkFactory, OutputStream stream, String encoding )
          throws IOException
      {
          this.sinkFactory = sinkFactory;
          this.coreOutputStream = stream;
          this.encoding = encoding;
          this.currentSink = sinkFactory.createSink( stream, encoding );
          this.coreSink = this.currentSink;
      }
  
      public RandomAccessSink( SinkFactory sinkFactory, File outputDirectory, String outputName )
          throws IOException
      {
          this.sinkFactory = sinkFactory;
          this.coreOutputStream = new FileOutputStream( new File( outputDirectory, outputName ) );
          this.currentSink = sinkFactory.createSink( coreOutputStream );
          this.coreSink = this.currentSink;
      }
  
      public RandomAccessSink( SinkFactory sinkFactory, File outputDirectory, String outputName, String encoding )
          throws IOException
      {
          this.sinkFactory = sinkFactory;
          this.coreOutputStream = new FileOutputStream( new File( outputDirectory, outputName ) );
          this.encoding = encoding;
          this.currentSink = sinkFactory.createSink( coreOutputStream, encoding );
          this.coreSink = this.currentSink;
      }
  
      /**
      * By calling this method a sink reference is added at the current position. You can write to both the new sink
      * reference and the original sink. After flushing all sinks will be flushed in the right order.
      * 
      * @return a subsink reference you can write to
      */
     public Sink addSinkHook()
     {
         Sink subSink = null;
         try
         {
             ByteArrayOutputStream subOut = new ByteArrayOutputStream();
             ByteArrayOutputStream newOut = new ByteArrayOutputStream();
 
             outputStreams.add( subOut );
             outputStreams.add( newOut );
 
             if ( encoding != null )
             {
                 subSink = sinkFactory.createSink( subOut, encoding );
                 currentSink = sinkFactory.createSink( newOut, encoding );
             }
             else
             {
                 subSink = sinkFactory.createSink( subOut );
                 currentSink = sinkFactory.createSink( newOut );
             }
             sinks.add( subSink );
             sinks.add( currentSink );
         }
         catch ( IOException e )
         {
             // IOException can only be caused by our own ByteArrayOutputStream
         }
         return subSink;
     }
 
     @Override
     public void anchor( String name )
     {
         currentSink.anchor( name );
     }
 
     @Override
     public void anchor( String name, SinkEventAttributes attributes )
     {
         currentSink.anchor( name, attributes );
     }
 
     @Override
     public void anchor_()
     {
         currentSink.anchor_();
     }
 
     @Override
     public void author()
     {
         currentSink.author();
     }
 
     @Override
     public void author( SinkEventAttributes attributes )
     {
         currentSink.author( attributes );
     }
 
     @Override
     public void author_()
     {
         currentSink.author_();
     }
 
     @Override
     public void body()
     {
         currentSink.body();
     }
 
     @Override
     public void body( SinkEventAttributes attributes )
     {
         currentSink.body( attributes );
     }
 
     @Override
     public void body_()
     {
         currentSink.body_();
     }
 
     @Override
     public void bold()
     {
         currentSink.bold();
     }
 
     @Override
     public void bold_()
     {
         currentSink.bold_();
     }
 
     /**
      * Close all sinks
      */
     public void close()
     {
         for ( Sink sink  : sinks )
         {
             // sink is responsible for closing it's stream
             sink.close();
         }
         coreSink.close();
     }
 
     @Override
     public void comment( String comment )
     {
         currentSink.comment( comment );
     }
 
     @Override
     public void date()
     {
         currentSink.date();
     }
 
     @Override
     public void date( SinkEventAttributes attributes )
     {
         currentSink.date( attributes );
     }
 
     @Override
     public void date_()
     {
         currentSink.date_();
     }
 
     @Override
     public void definedTerm()
     {
         currentSink.definedTerm();
     }
 
     @Override
     public void definedTerm( SinkEventAttributes attributes )
     {
         currentSink.definedTerm( attributes );
     }
 
     @Override
     public void definedTerm_()
     {
         currentSink.definedTerm_();
     }
 
     @Override
     public void definition()
     {
         currentSink.definition();
     }
 
     @Override
     public void definition( SinkEventAttributes attributes )
     {
         currentSink.definition( attributes );
     }
 
     @Override
     public void definitionList()
     {
         currentSink.definitionList();
     }
 
     @Override
     public void definitionList( SinkEventAttributes attributes )
     {
         currentSink.definitionList( attributes );
     }
 
     @Override
     public void definitionListItem()
     {
         currentSink.definitionListItem();
     }
 
     @Override
     public void definitionListItem( SinkEventAttributes attributes )
     {
         currentSink.definitionListItem( attributes );
     }
 
     @Override
     public void definitionListItem_()
     {
         currentSink.definitionListItem_();
     }
 
     @Override
     public void definitionList_()
     {
         currentSink.definitionList_();
     }
 
     @Override
     public void definition_()
     {
         currentSink.definition_();
     }
 
     @Override
     public void figure()
     {
         currentSink.figure();
     }
 
     @Override
     public void figure( SinkEventAttributes attributes )
     {
         currentSink.figure( attributes );
     }
 
     @Override
     public void figureCaption()
     {
         currentSink.figureCaption();
     }
 
     @Override
     public void figureCaption( SinkEventAttributes attributes )
     {
         currentSink.figureCaption( attributes );
     }
 
     @Override
     public void figureCaption_()
     {
         currentSink.figureCaption_();
     }
 
     @Override
     public void figureGraphics( String name )
     {
         currentSink.figureGraphics( name );
     }
 
     @Override
     public void figureGraphics( String src, SinkEventAttributes attributes )
     {
         currentSink.figureGraphics( src, attributes );
     }
 
     @Override
     public void figure_()
     {
         currentSink.figure_();
     }
 
     /**
      * Flush all sinks
      */
     public void flush()
     {
         for ( int i = 0; i < sinks.size(); i++ )
         {
             // first flush to get complete buffer
             // sink is responsible for flushing it's stream
             Sink sink = sinks.get( i );
             sink.flush();
 
             ByteArrayOutputStream stream = outputStreams.get( i );
             try
             {
                 coreOutputStream.write( stream.toByteArray() );
             }
             catch ( IOException e )
             {
                 // @todo
             }
         }
         coreSink.flush();
     }
 
     @Override
     public void head()
     {
         currentSink.head();
     }
 
     @Override
     public void head( SinkEventAttributes attributes )
     {
         currentSink.head( attributes );
     }
 
     @Override
     public void head_()
     {
         currentSink.head_();
     }
 
     @Override
     public void horizontalRule()
     {
         currentSink.horizontalRule();
     }
 
     @Override
     public void horizontalRule( SinkEventAttributes attributes )
     {
         currentSink.horizontalRule( attributes );
     }
 
     @Override
     public void italic()
     {
         currentSink.italic();
     }
 
     @Override
     public void italic_()
     {
         currentSink.italic_();
     }
 
     @Override
     public void lineBreak()
     {
         currentSink.lineBreak();
     }
 
     @Override
     public void lineBreak( SinkEventAttributes attributes )
     {
         currentSink.lineBreak( attributes );
     }
 
     @Override
     public void link( String name )
     {
         currentSink.link( name );
     }
 
     @Override
     public void link( String name, SinkEventAttributes attributes )
     {
         currentSink.link( name, attributes );
     }
 
     @Override
     public void link_()
     {
         currentSink.link_();
     }
 
     @Override
     public void list()
     {
         currentSink.list();
     }
 
     @Override
     public void list( SinkEventAttributes attributes )
     {
         currentSink.list( attributes );
     }
 
     @Override
     public void listItem()
     {
         currentSink.listItem();
     }
 
     @Override
     public void listItem( SinkEventAttributes attributes )
     {
         currentSink.listItem( attributes );
     }
 
     @Override
     public void listItem_()
     {
         currentSink.listItem_();
     }
 
     @Override
     public void list_()
     {
         currentSink.list_();
     }
 
     @Override
     public void monospaced()
     {
         currentSink.monospaced();
     }
 
     @Override
     public void monospaced_()
     {
         currentSink.monospaced_();
     }
 
     @Override
     public void nonBreakingSpace()
     {
         currentSink.nonBreakingSpace();
     }
 
     @Override
     public void numberedList( int numbering )
     {
         currentSink.numberedList( numbering );
     }
 
     @Override
     public void numberedList( int numbering, SinkEventAttributes attributes )
     {
         currentSink.numberedList( numbering, attributes );
     }
 
     @Override
     public void numberedListItem()
     {
         currentSink.numberedListItem();
     }
 
     @Override
     public void numberedListItem( SinkEventAttributes attributes )
     {
         currentSink.numberedListItem( attributes );
     }
 
     @Override
     public void numberedListItem_()
     {
         currentSink.numberedListItem_();
     }
 
     @Override
     public void numberedList_()
     {
         currentSink.numberedList_();
     }
 
     @Override
     public void pageBreak()
     {
         currentSink.pageBreak();
     }
 
     @Override
     public void paragraph()
     {
         currentSink.paragraph();
     }
 
     @Override
     public void paragraph( SinkEventAttributes attributes )
     {
         currentSink.paragraph( attributes );
     }
 
     @Override
     public void paragraph_()
     {
         currentSink.paragraph_();
     }
 
     @Override
     public void rawText( String text )
     {
         currentSink.rawText( text );
     }
 
     @Override
     public void section( int level, SinkEventAttributes attributes )
     {
         currentSink.section( level, attributes );
     }
 
     @Override
     public void section1()
     {
         currentSink.section1();
     }
 
     @Override
     public void section1_()
     {
         currentSink.section1_();
     }
 
     @Override
     public void section2()
     {
         currentSink.section2();
     }
 
     @Override
     public void section2_()
     {
         currentSink.section2_();
     }
 
     @Override
     public void section3()
     {
         currentSink.section3();
     }
 
     @Override
     public void section3_()
     {
         currentSink.section3_();
     }
 
     @Override
     public void section4()
     {
         currentSink.section4();
     }
 
     @Override
     public void section4_()
     {
         currentSink.section4_();
     }
 
     @Override
     public void section5()
     {
         currentSink.section5();
     }
 
     @Override
     public void section5_()
     {
         currentSink.section5_();
     }
 
     @Override
     public void section6()
     {
         currentSink.section5();
     }
 
     @Override
     public void section6_()
     {
         currentSink.section5_();
     }
 
     @Override
     public void sectionTitle()
     {
         currentSink.sectionTitle();
     }
 
     @Override
     public void sectionTitle( int level, SinkEventAttributes attributes )
     {
         currentSink.sectionTitle( level, attributes );
     }
 
     @Override
     public void sectionTitle1()
     {
         currentSink.sectionTitle1();
     }
 
     @Override
     public void sectionTitle1_()
     {
         currentSink.sectionTitle1_();
     }
 
     @Override
     public void sectionTitle2()
     {
         currentSink.sectionTitle2();
     }
 
     @Override
     public void sectionTitle2_()
     {
         currentSink.sectionTitle2_();
     }
 
     @Override
     public void sectionTitle3()
     {
         currentSink.sectionTitle3();
     }
 
     @Override
     public void sectionTitle3_()
     {
         currentSink.sectionTitle3_();
     }
 
     @Override
     public void sectionTitle4()
     {
         currentSink.sectionTitle4();
     }
 
     @Override
     public void sectionTitle4_()
     {
         currentSink.sectionTitle4_();
     }
 
     @Override
     public void sectionTitle5()
     {
         currentSink.sectionTitle5();
     }
 
     @Override
     public void sectionTitle5_()
     {
         currentSink.sectionTitle5_();
     }
 
     @Override
     public void sectionTitle6()
     {
         currentSink.sectionTitle5();
     }
 
     @Override
     public void sectionTitle6_()
     {
         currentSink.sectionTitle5_();
     }
 
     @Override
     public void sectionTitle_()
     {
         currentSink.sectionTitle_();
     }
 
     @Override
     public void sectionTitle_( int level )
     {
         currentSink.sectionTitle_( level );
     }
 
     @Override
     public void section_( int level )
     {
         currentSink.section_( level );
     }
 
     @Override
     public void table()
     {
         currentSink.table();
     }
 
     @Override
     public void table( SinkEventAttributes attributes )
     {
         currentSink.table( attributes );
     }
 
     @Override
     public void tableCaption()
     {
         currentSink.tableCaption();
     }
 
     @Override
     public void tableCaption( SinkEventAttributes attributes )
     {
         currentSink.tableCaption( attributes );
     }
 
     @Override
     public void tableCaption_()
     {
         currentSink.tableCaption_();
     }
 
     @Override
     public void tableCell()
     {
         currentSink.tableCell();
     }
 
     @Override
     public void tableCell( String width )
     {
         currentSink.tableCell( width );
     }
 
     @Override
     public void tableCell( SinkEventAttributes attributes )
     {
         currentSink.tableCell( attributes );
     }
 
     @Override
     public void tableCell_()
     {
         currentSink.tableCell_();
     }
 
     @Override
     public void tableHeaderCell()
     {
         currentSink.tableHeaderCell();
     }
 
     @Override
     public void tableHeaderCell( String width )
     {
         currentSink.tableHeaderCell( width );
     }
 
     @Override
     public void tableHeaderCell( SinkEventAttributes attributes )
     {
         currentSink.tableHeaderCell( attributes );
     }
 
     @Override
     public void tableHeaderCell_()
     {
         currentSink.tableHeaderCell_();
     }
 
     @Override
     public void tableRow()
     {
         currentSink.tableRow();
     }
 
     @Override
     public void tableRow( SinkEventAttributes attributes )
     {
         currentSink.tableRow( attributes );
     }
 
     @Override
     public void tableRow_()
     {
         currentSink.tableRow_();
     }
 
     @Override
     public void tableRows( int[] justification, boolean grid )
     {
         currentSink.tableRows( justification, grid );
     }
 
     @Override
     public void tableRows_()
     {
         currentSink.tableRows_();
     }
 
     @Override
     public void table_()
     {
         currentSink.table_();
     }
 
     @Override
     public void text( String text )
     {
         currentSink.text( text );
     }
 
     @Override
     public void text( String text, SinkEventAttributes attributes )
     {
         currentSink.text( text, attributes );
     }
 
     @Override
     public void title()
     {
         currentSink.title();
     }
 
     @Override
     public void title( SinkEventAttributes attributes )
     {
         currentSink.title( attributes );
     }
 
     @Override
     public void title_()
     {
         currentSink.title_();
     }
 
     @Override
     public void unknown( String name, Object[] requiredParams, SinkEventAttributes attributes )
     {
         currentSink.unknown( name, requiredParams, attributes );
     }
 
     @Override
     public void verbatim( boolean boxed )
     {
         currentSink.verbatim( boxed );
     }
 
     @Override
     public void verbatim( SinkEventAttributes attributes )
     {
         currentSink.verbatim( attributes );
     }
 
     @Override
     public void verbatim_()
     {
         currentSink.verbatim_();
     }
 
     @Override
     public void enableLogging( Log log )
     {
         currentSink.enableLogging( log );
     }
 }