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: ConnectionReadHandlerFactory.java 2725 2007-04-01 18:49:29Z taqua $
027     * ------------
028     * (C) Copyright 2000-2005, by Object Refinery Limited.
029     * (C) Copyright 2005-2007, by Pentaho Corporation.
030     */
031    
032    package org.jfree.report.modules.factories.data.sql;
033    
034    import java.util.Iterator;
035    
036    import org.jfree.report.JFreeReportBoot;
037    import org.jfree.xmlns.parser.AbstractReadHandlerFactory;
038    import org.jfree.util.Configuration;
039    
040    /**
041     * Creation-Date: Dec 17, 2006, 8:58:11 PM
042     *
043     * @author Thomas Morgner
044     */
045    public class ConnectionReadHandlerFactory extends AbstractReadHandlerFactory
046    {
047      private static final String PREFIX_SELECTOR =
048          "org.jfree.report.modules.factories.data.sql.connection-factory-prefix.";
049    
050      private static ConnectionReadHandlerFactory readHandlerFactory;
051    
052      public ConnectionReadHandlerFactory()
053      {
054      }
055    
056      protected Class getTargetClass()
057      {
058        return ConnectionReadHandler.class;
059      }
060    
061      public static synchronized ConnectionReadHandlerFactory getInstance()
062      {
063        if (readHandlerFactory == null)
064        {
065          readHandlerFactory = new ConnectionReadHandlerFactory();
066          final Configuration config = JFreeReportBoot.getInstance().getGlobalConfig();
067          final Iterator propertyKeys = config.findPropertyKeys(PREFIX_SELECTOR);
068          while (propertyKeys.hasNext())
069          {
070            final String key = (String) propertyKeys.next();
071            final String value = config.getConfigProperty(key);
072            if (value != null)
073            {
074              readHandlerFactory.configure(config, value);
075            }
076          }
077        }
078        return readHandlerFactory;
079      }
080    
081    }