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Java > Open Source Codes > net > sf > jasperreports > engine > xml > JRDatasetRunParameterExpressionFactory


1 /*
2  * ============================================================================
3  * GNU Lesser General Public License
4  * ============================================================================
5  *
6  * JasperReports - Free Java report-generating library.
7  * Copyright (C) 2001-2006 JasperSoft Corporation http://www.jaspersoft.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  * JasperSoft Corporation
24  * 303 Second Street, Suite 450 North
25  * San Francisco, CA 94107
26  * http://www.jaspersoft.com
27  */
28 package net.sf.jasperreports.engine.xml;
29
30 import net.sf.jasperreports.engine.JRDatasetParameter;
31 import net.sf.jasperreports.engine.JRDatasetRun;
32 import net.sf.jasperreports.engine.JRException;
33 import net.sf.jasperreports.engine.JRParameter;
34 import net.sf.jasperreports.engine.design.JRDesignDataset;
35 import net.sf.jasperreports.engine.design.JRDesignExpression;
36 import net.sf.jasperreports.engine.design.JasperDesign;
37
38 import org.xml.sax.Attributes JavaDoc;
39
40 /**
41  * @author Lucian Chirita (lucianc@users.sourceforge.net)
42  * @version $Id: JRDatasetRunParameterExpressionFactory.java 1536 2006-12-22 12:34:40 +0200 (Fri, 22 Dec 2006) teodord $
43  */
44 public class JRDatasetRunParameterExpressionFactory extends JRBaseFactory
45 {
46     public static final String JavaDoc ELEMENT_datasetParameterExpression = "datasetParameterExpression";
47     
48     public Object JavaDoc createObject(Attributes JavaDoc attributes)
49     {
50         String JavaDoc valueClassName = Object JavaDoc.class.getName();
51         
52         JRXmlLoader xmlLoader = (JRXmlLoader) digester.peek(digester.getCount() - 1);
53         JasperDesign design = (JasperDesign) digester.peek(digester.getCount() - 2);
54         JRDatasetRun datasetRun = (JRDatasetRun) digester.peek(1);
55         
56         JRDesignDataset dataset = (JRDesignDataset) design.getDatasetMap().get(datasetRun.getDatasetName());
57         if (dataset == null)
58         {
59             xmlLoader.addError(new JRException("Unknown sub dataset " + datasetRun.getDatasetName()));
60         }
61         else
62         {
63             JRDatasetParameter runParameter = (JRDatasetParameter) digester.peek();
64             JRParameter param = (JRParameter) dataset.getParametersMap().get(runParameter.getName());
65             
66             if (param == null)
67             {
68                 xmlLoader.addError(new JRException("Unknown parameter " + runParameter.getName() + " in sub dataset " + datasetRun.getDatasetName()));
69             }
70             else
71             {
72                 valueClassName = param.getValueClassName();
73             }
74         }
75
76         JRDesignExpression expression = new JRDesignExpression();
77         expression.setValueClassName(valueClassName);
78         
79         return expression;
80     }
81 }
82
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