/*
    *
    * 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.database;
  
  import org.dbunit.dataset.DataSetException;
  import org.dbunit.dataset.IDataSet;
  import org.dbunit.dataset.ITable;
  import org.dbunit.dataset.ITableIterator;
  import org.dbunit.dataset.ITableMetaData;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * @author Manuel Laflamme
   * @author Last changed by: $Author$
   * @version $Revision$ $Date$
   * @since 1.x (Apr 12, 2003)
   */
  public class DatabaseTableIterator implements ITableIterator
  {
  
      /**
       * Logger for this class
       */
      private static final Logger logger = LoggerFactory.getLogger(DatabaseTableIterator.class);
  
      private final String[] _tableNames;
      private final IDataSet _dataSet;
      private IResultSetTable _currentTable;
      private int _index = -1;
  
      public DatabaseTableIterator(String[] tableNames, IDataSet dataSet)
      {
          _tableNames = tableNames;
          _dataSet = dataSet;
          _currentTable = null;
      }
  
      ////////////////////////////////////////////////////////////////////////////
      // ITableIterator interface
  
      public boolean next() throws DataSetException
      {
          logger.debug("next() - start");
  
          _index++;
  
          // Ensure previous table is closed
          if (_currentTable != null)
          {
              _currentTable.close();
              _currentTable = null;
          }
  
          return _index < _tableNames.length;
      }
  
      public ITableMetaData getTableMetaData() throws DataSetException
      {
          logger.debug("getTableMetaData() - start");
  
          return _dataSet.getTableMetaData(_tableNames[_index]);
      }
  
      public ITable getTable() throws DataSetException
      {
          logger.debug("getTable() - start");
  
          if (_currentTable == null)
          {
              _currentTable = (IResultSetTable)_dataSet.getTable(_tableNames[_index]);
          }
          return _currentTable;
      }
  }