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Java > Open Source Codes > net > sf > jasperreports > engine > fill > JRFillSubreportReturnValue


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.fill;
29
30 import net.sf.jasperreports.engine.JRRuntimeException;
31 import net.sf.jasperreports.engine.JRSubreportReturnValue;
32 import net.sf.jasperreports.engine.JRVariable;
33 import net.sf.jasperreports.engine.util.JRClassLoader;
34
35
36 /**
37  * Implementation of {@link net.sf.jasperreports.engine.JRSubreportReturnValue JRSubreportReturnValue}
38  * used by the filler.
39  *
40  * @author Lucian Chirita (lucianc@users.sourceforge.net)
41  * @version $Id: JRFillSubreportReturnValue.java 1280 2006-06-07 15:21:28 +0300 (Wed, 07 Jun 2006) teodord $
42  */
43 public class JRFillSubreportReturnValue implements JRSubreportReturnValue
44 {
45     protected final JRSubreportReturnValue parent;
46
47     protected JRIncrementer incrementer = null;
48     
49     protected final JRBaseFiller filler;
50
51
52     protected JRFillSubreportReturnValue(
53         JRSubreportReturnValue returnValue,
54         JRFillObjectFactory factory, JRBaseFiller filler
55         )
56     {
57         factory.put(returnValue, this);
58
59         parent = returnValue;
60         
61         this.filler = filler;
62     }
63
64     public String JavaDoc getSubreportVariable()
65     {
66         return parent.getSubreportVariable();
67     }
68
69     public String JavaDoc getToVariable()
70     {
71         return parent.getToVariable();
72     }
73         
74     public String JavaDoc getIncrementerFactoryClassName()
75     {
76         return parent.getIncrementerFactoryClassName();
77     }
78         
79     public byte getCalculation()
80     {
81         return parent.getCalculation();
82     }
83
84         
85     /**
86      * Gets the incrementer to be used for this copied value.
87      */
88     public JRIncrementer getIncrementer()
89     {
90         if (incrementer == null)
91         {
92             String JavaDoc incrementerFactoryClassName = getIncrementerFactoryClassName();
93             
94             JRIncrementerFactory incrementerFactory;
95             if (incrementerFactoryClassName == null)
96             {
97                 JRVariable toVariable = filler.getVariable(getToVariable());
98                 incrementerFactory = JRDefaultIncrementerFactory.getFactory(toVariable.getValueClass());
99             }
100             else
101             {
102                 try
103                 {
104                     Class JavaDoc incrementerFactoryClass = JRClassLoader.loadClassForName(incrementerFactoryClassName);
105                     incrementerFactory = JRIncrementerFactoryCache.getInstance(incrementerFactoryClass);
106                 }
107                 catch (ClassNotFoundException JavaDoc e)
108                 {
109                     throw new JRRuntimeException("Increment class " + incrementerFactoryClassName + " not found.", e);
110                 }
111             }
112             
113             incrementer = incrementerFactory.getIncrementer(getCalculation());
114         }
115         
116         return incrementer;
117     }
118 }
119
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