001    /**
002     * ========================================
003     * JFreeReport : a free Java report library
004     * ========================================
005     *
006     * Project Info:  http://reporting.pentaho.org/
007     *
008     * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors.
009     *
010     * This library is free software; you can redistribute it and/or modify it under the terms
011     * of the GNU Lesser General Public License as published by the Free Software Foundation;
012     * either version 2.1 of the License, or (at your option) any later version.
013     *
014     * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
015     * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
016     * See the GNU Lesser General Public License for more details.
017     *
018     * You should have received a copy of the GNU Lesser General Public License along with this
019     * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
020     * Boston, MA 02111-1307, USA.
021     *
022     * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
023     * in the United States and other countries.]
024     *
025     * ------------
026     * $Id: TableReportDataFactory.java 3525 2007-10-16 11:43:48Z tmorgner $
027     * ------------
028     * (C) Copyright 2000-2005, by Object Refinery Limited.
029     * (C) Copyright 2005-2007, by Pentaho Corporation.
030     */
031    package org.jfree.report;
032    
033    import java.util.HashMap;
034    import javax.swing.table.TableModel;
035    
036    /**
037     * Creation-Date: 21.02.2006, 17:59:32
038     *
039     * @author Thomas Morgner
040     */
041    public class TableReportDataFactory implements ReportDataFactory, Cloneable
042    {
043      private HashMap tables;
044    
045      public TableReportDataFactory()
046      {
047        this.tables = new HashMap();
048      }
049    
050      public TableReportDataFactory(final String name, final TableModel tableModel)
051      {
052        this();
053        addTable(name, tableModel);
054      }
055    
056      public void addTable(final String name, final TableModel tableModel)
057      {
058        tables.put(name, tableModel);
059      }
060    
061      public void removeTable(final String name)
062      {
063        tables.remove(name);
064      }
065    
066      /**
067       * Queries a datasource. The string 'query' defines the name of the query. The
068       * Parameterset given here may contain more data than actually needed.
069       * <p/>
070       * The dataset may change between two calls, do not assume anything!
071       *
072       * @param query the name of the table.
073       * @param parameters are ignored for this factory.
074       * @return the report data or null.
075       */
076      public ReportData queryData(final String query, final DataSet parameters)
077              throws ReportDataFactoryException
078      {
079        final TableModel model = (TableModel) tables.get(query);
080        if (model == null)
081        {
082          return null;
083        }
084    
085        return new TableReportData(model);
086      }
087    
088      public void open()
089      {
090    
091      }
092    
093      public void close()
094      {
095    
096      }
097    
098      /**
099       * Derives a freshly initialized report data factory, which is independend of
100       * the original data factory. Opening or Closing one data factory must not
101       * affect the other factories.
102       *
103       * @return
104       */
105      public ReportDataFactory derive()
106      {
107        try
108        {
109          return (ReportDataFactory) clone();
110        }
111        catch (CloneNotSupportedException e)
112        {
113          throw new IllegalStateException("Clone should not fail.");
114        }
115      }
116    
117      public Object clone () throws CloneNotSupportedException
118      {
119        final TableReportDataFactory dataFactory = (TableReportDataFactory) super.clone();
120        dataFactory.tables = (HashMap) tables.clone();
121        return dataFactory;
122      }
123    }