JRDataSourceRSV


1   /*
2    * $Header: /cvsroot/jdbforms/dbforms/src/org/dbforms/servlets/reports/JRDataSourceRSV.java,v 1.19 2004/10/24 13:47:30 hkollmann Exp $
3    * $Revision: 1.19 $
4    * $Date: 2004/10/24 13:47:30 $
5    *
6    * DbForms - a Rapid Application Development Framework
7    * Copyright (C) 2001 Joachim Peer <joepeer@excite.com>
8    *
9    * This library is free software; you can redistribute it and/or
10   * modify it under the terms of the GNU Lesser General Public
11   * License as published by the Free Software Foundation; either
12   * version 2.1 of the License, or (at your option) any later version.
13   *
14   * This library is distributed in the hope that it will be useful,
15   * but WITHOUT ANY WARRANTY; without even the implied warranty of
16   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17   * Lesser General Public License for more details.
18   *
19   * You should have received a copy of the GNU Lesser General Public
20   * License along with this library; if not, write to the Free Software
21   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
22   */
23  
24  package org.dbforms.servlets.reports;
25  
26  import net.sf.jasperreports.engine.JRException;
27  
28  import org.apache.commons.logging.Log;
29  import org.apache.commons.logging.LogFactory;
30  
31  import org.dbforms.config.ResultSetVector;
32  import java.util.Map  ;
33  
34  /**
35   * use a ResultSetVector as data source.
36   */
37  public final class JRDataSourceRSV extends JRDataSourceAbstract  {
38      private static Log logCat = LogFactory.getLog(JRDataSourceRSV.class
39              .getName());
40  
41      private ResultSetVector rsv;
42      /**
43       * Constructor for JRDataSourceRSV.
44       * 
45       * @param rsv
46       *            DOCUMENT ME!
47       * @param pageContext
48       *            DOCUMENT ME!
49       */
50      public JRDataSourceRSV(Map   attributes, ResultSetVector rsv) {
51          super(attributes);
52          this.rsv = rsv;
53          this.rsv.moveFirst();
54          // Set the pointer to one place before the first record
55          // Retriving data for JRDataSource will start with a moveNext!
56          this.rsv.movePrevious();
57      }
58  
59      /**
60       * @see net.sf.jasperreports.engine.JRDataSource#next()
61       */
62      public boolean next() throws JRException {
63          if (ResultSetVector.isNull(rsv)) {
64              return false;
65          }
66          if (rsv.isLast()) {
67              return false;
68          }
69          rsv.moveNext();
70          return true;
71      }
72  
73      public Object   getFieldValue(String   fieldName) {
74          Object   o = null;
75          try {
76              o = rsv.getFieldAsObject(fieldName);
77          } catch (Exception   e) {
78              logCat.error("getFieldValue", e);
79          }
80          return o;
81      }
82  
83  }
84
A to Z: JavaDoc & Examples Daily Java News & Articles Open Source Projects Open Source Codes Free Computer Books Remove Frame
Popular Tags