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1   /*
2    *
3    * The DbUnit Database Testing Framework
4    * Copyright (C)2002-2008, DbUnit.org
5    *
6    * This library is free software; you can redistribute it and/or
7    * modify it under the terms of the GNU Lesser General Public
8    * License as published by the Free Software Foundation; either
9    * version 2.1 of the License, or (at your option) any later version.
10   *
11   * This library is distributed in the hope that it will be useful,
12   * but WITHOUT ANY WARRANTY; without even the implied warranty of
13   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14   * Lesser General Public License for more details.
15   *
16   * You should have received a copy of the GNU Lesser General Public
17   * License along with this library; if not, write to the Free Software
18   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
19   *
20   */
21  package org.dbunit.dataset;
22  
23  import org.dbunit.dataset.filter.IColumnFilter;
24  import org.slf4j.Logger;
25  import org.slf4j.LoggerFactory;
26  
27  /**
28   * A table that filters some columns out from the original table.
29   * 
30   * @author gommma (gommma AT users.sourceforge.net)
31   * @author Last changed by: $Author$
32   * @version $Revision$ $Date$
33   * @since 2.4.0
34   */
35  public class ColumnFilterTable implements ITable 
36  {
37      /** 
38       * logger 
39       */
40      private final Logger logger = LoggerFactory.getLogger(ColumnFilterTable.class);
41  
42      /** 
43       * reference to the original table being wrapped 
44       */
45      private final ITable originalTable;
46      
47      /**
48       * The filtered table metadata
49       */
50      private final ITableMetaData tableMetaData;
51  
52      
53      /**
54       * @param table The table from which some columns should be filtered
55       * @param columnFilter The filter defining which columns to be filtered
56       * @throws DataSetException
57       */
58      public ColumnFilterTable(ITable table, IColumnFilter columnFilter) 
59      throws DataSetException
60      {
61          if (columnFilter == null) {
62              throw new NullPointerException(
63                      "The parameter 'columnFilter' must not be null");
64          }
65          if (table == null) {
66              throw new NullPointerException(
67                      "The parameter 'table' must not be null");
68          }
69          
70          this.tableMetaData = new FilteredTableMetaData(
71                  table.getTableMetaData(), columnFilter);
72          this.originalTable = table;
73      }
74  
75      
76      public int getRowCount() 
77      {
78          logger.debug("getRowCount() - start");
79          return this.originalTable.getRowCount();
80      }
81  
82      public ITableMetaData getTableMetaData() 
83      {
84          logger.debug("getTableMetaData() - start");
85          return this.tableMetaData;
86      }
87  
88      public Object getValue(int row, String column) throws DataSetException 
89      {
90          if(logger.isDebugEnabled())
91              logger.debug("getValue(row={}, columnName={}) - start", Integer.toString(row), column);
92  
93          return this.originalTable.getValue(row, column);
94      }
95  
96      public ITableMetaData getOriginalMetaData() 
97      {
98          logger.debug("getOriginalMetaData() - start");
99          return this.originalTable.getTableMetaData();
100     }
101 
102     public String toString() 
103     {
104     	return this.originalTable.toString();
105     }
106 }