/*
    *
    * 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;
  
  import java.util.Arrays;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * @author Manuel Laflamme
   * @version $Revision$
   * @since Feb 17, 2002
   */
  public class CompositeTable extends AbstractTable {
  
      /**
       * Logger for this class
       */
      private static final Logger logger =
              LoggerFactory.getLogger(CompositeTable.class);
  
      private final ITableMetaData _metaData;
      private final ITable[] _tables;
  
      /**
       * Creates a composite table that combines the specified metadata with the
       * specified table.
       */
      public CompositeTable(ITableMetaData metaData, ITable table) {
          _metaData = metaData;
          _tables = new ITable[] {table};
      }
  
      /**
       * Creates a composite table that combines the specified metadata with the
       * specified tables.
       */
      public CompositeTable(ITableMetaData metaData, ITable[] tables) {
          _metaData = metaData;
          _tables = tables;
      }
  
      /**
       * Creates a composite table that combines the specified specified tables.
       * The metadata from the first table is used as metadata for the new table.
       */
      public CompositeTable(ITable table1, ITable table2) {
          _metaData = table1.getTableMetaData();
          _tables = new ITable[] {table1, table2};
      }
  
      /**
       * Creates a composite dataset that encapsulate the specified table with a
       * new name.
       */
      public CompositeTable(String newName, ITable table) throws DataSetException {
          ITableMetaData metaData = table.getTableMetaData();
          _metaData =
                  new DefaultTableMetaData(newName, metaData.getColumns(),
                          metaData.getPrimaryKeys());
          _tables = new ITable[] {table};
      }
  
      // //////////////////////////////////////////////////////////////////////////
      // ITable interface
  
      public ITableMetaData getTableMetaData() {
          return _metaData;
      }
  
      public int getRowCount() {
          logger.debug("getRowCount() - start");
  
          int totalCount = 0;
          for (int i = 0; i < _tables.length; i++) {
              ITable table = _tables[i];
              totalCount += table.getRowCount();
          }
  
         return totalCount;
     }
 
     public Object getValue(int row, String columnName) throws DataSetException {
         if (logger.isDebugEnabled()) {
             logger.debug("getValue(row={}, columnName={}) - start", Integer
                     .toString(row), columnName);
         }
 
         if (row < 0) {
             throw new RowOutOfBoundsException(row + " < 0 ");
         }
 
         int totalCount = 0;
         for (int i = 0; i < _tables.length; i++) {
             ITable table = _tables[i];
 
             int count = table.getRowCount();
             if (totalCount + count > row) {
                 return table.getValue(row - totalCount, columnName);
             }
             totalCount += count;
         }
 
         throw new RowOutOfBoundsException(row + " > " + totalCount);
     }
 
     /**
      * {@inheritDoc}
      */
     public String toString() {
         StringBuilder sb = new StringBuilder(2000);
 
         sb.append(getClass().getName()).append("[");
         sb.append("_metaData=[").append(_metaData).append("], ");
         sb.append("_tables=[").append(Arrays.toString(_tables)).append("]");
         sb.append("]");
 
         return sb.toString();
     }
 }