/*
    *
    * The DbUnit Database Testing Framework
    * Copyright (C)2002-2004, DbUnit.org
    *
    * This library is free software; you can redistribute it and/or
    * modify it under the terms of the GNU Lesser General Public
    * License as published by the Free Software Foundation; either
    * version 2.1 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   *
   */
  package org.dbunit.dataset.xml;
  
  import java.io.PrintWriter;
  import java.io.Writer;
  
  import org.dbunit.dataset.Column;
  import org.dbunit.dataset.DataSetException;
  import org.dbunit.dataset.IDataSet;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * @author Manuel Laflamme
   * @author Last changed by: $Author$
   * @version $Revision$ $Date$
   * @since Jun 13, 2003
   */
  public class FlatDtdWriter //implements IDataSetConsumer
  {
  
      /**
       * Logger for this class
       */
      private static final Logger logger = LoggerFactory.getLogger(FlatDtdWriter.class);
  
      public static final ContentModel SEQUENCE = new SequenceModel();
      public static final ContentModel CHOICE   = new ChoiceModel();
  
      private Writer _writer;
      private ContentModel _contentModel;
  
      public FlatDtdWriter(Writer writer)
      {
          _writer = writer;
          _contentModel = SEQUENCE;
      }
  
      public void setContentModel(ContentModel contentModel)
      {
          logger.debug("setContentModel(contentModel={}) - start", contentModel);
          _contentModel = contentModel;
      }
  
      public void write(IDataSet dataSet) throws DataSetException
      {
          logger.debug("write(dataSet={}) - start", dataSet);
  
          PrintWriter printOut = new PrintWriter(_writer);
          String[] tableNames = dataSet.getTableNames();
  
          // dataset element
          printOut.print("<!ELEMENT dataset (\n");
          for (int i = 0; i < tableNames.length; i++)
          {
              _contentModel.write(printOut, tableNames[i], i, tableNames.length);
          }
          printOut.print(")>\n");
          printOut.print("\n");
  
          // tables
          for (int i = 0; i < tableNames.length; i++)
          {
              // table element
              String tableName = tableNames[i];
              printOut.print("<!ELEMENT ");
              printOut.print(tableName);
              printOut.print(" EMPTY>\n");
  
              // column attributes
              printOut.print("<!ATTLIST ");
              printOut.print(tableName);
              printOut.print("\n");
              // Add the columns
              Column[] columns = dataSet.getTableMetaData(tableName).getColumns();
              for (int j = 0; j < columns.length; j++)
              {
                  Column column = columns[j];
                  printOut.print("    ");
                  printOut.print(column.getColumnName());
                 if (column.getNullable() == Column.NO_NULLS  && column.getDefaultValue() == null)
                 {
                     printOut.print(" CDATA " + FlatDtdProducer.REQUIRED + "\n");
                 }
                 else
                 {
                     printOut.print(" CDATA " + FlatDtdProducer.IMPLIED + "\n");
                 }
             }
             printOut.print(">\n");
             printOut.print("\n");
         }
 
         printOut.flush();
     }
 
     /**
      * @author Manuel Laflamme
      * @author Last changed by: $Author$
      * @version $Revision$ $Date$
      * @since Jun 13, 2003
      */
     public static abstract class ContentModel
     {
         private final String _name;
 
         private ContentModel(String name)
         {
             _name = name;
         }
 
         public String toString()
         {
             return _name;
         }
 
         public abstract void write(PrintWriter writer, String tableName,
                 int tableIndex, int tableCount);
     }
 
     
     /**
      * @author Manuel Laflamme
      * @author Last changed by: $Author$
      * @version $Revision$ $Date$
      * @since Jun 13, 2003
      */
     public static class SequenceModel extends ContentModel
     {
 
         /**
          * Logger for this class
          */
         private static final Logger logger = LoggerFactory.getLogger(SequenceModel.class);
 
         private SequenceModel()
         {
             super("sequence");
         }
 
         public void write(PrintWriter writer, String tableName, int tableIndex, int tableCount)
         {
         	if (logger.isDebugEnabled())
         	{
         		logger.debug("write(writer={}, tableName={}, tableIndex={}, tableCount={}) - start",
         				new Object[]{ writer, tableName, String.valueOf(tableIndex), String.valueOf(tableCount)});
         	}
 
             boolean last = (tableIndex + 1) == tableCount;
 
             writer.print("    ");
             writer.print(tableName);
             writer.print("*");
             if (!last)
             {
                 writer.print(",\n");
             }
         }
     }
 
     /**
      * @author Manuel Laflamme
      * @author Last changed by: $Author$
      * @version $Revision$ $Date$
      * @since Jun 13, 2003
      */
     public static class ChoiceModel extends ContentModel
     {
 
         /**
          * Logger for this class
          */
         private static final Logger logger = LoggerFactory.getLogger(ChoiceModel.class);
 
         private ChoiceModel()
         {
             super("sequence");
         }
 
         public void write(PrintWriter writer, String tableName, int tableIndex, int tableCount)
         {
         	if (logger.isDebugEnabled())
         	{
         		logger.debug("write(writer={}, tableName={}, tableIndex={}, tableCount={}) - start",
         				new Object[]{ writer, tableName, String.valueOf(tableIndex), String.valueOf(tableCount)});
         	}
 
             boolean first = tableIndex == 0;
             boolean last = (tableIndex + 1) == tableCount;
 
             if (first)
             {
                 writer.print("   (");
             }
             else
             {
                 writer.print("    ");
             }
             writer.print(tableName);
 
             if (!last)
             {
                 writer.print("|\n");
             }
             else
             {
                 writer.print(")*");
             }
         }
     }
 }