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Java > Open Source Codes > net > sf > jasperreports > engine > data > JRBeanCollectionDataSource


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.data;
29
30 import java.util.Collection JavaDoc;
31 import java.util.Iterator JavaDoc;
32
33 import net.sf.jasperreports.engine.JRException;
34 import net.sf.jasperreports.engine.JRField;
35
36
37 /**
38  * @author Teodor Danciu (teodord@users.sourceforge.net)
39  * @version $Id: JRBeanCollectionDataSource.java 1229 2006-04-19 13:27:35 +0300 (Wed, 19 Apr 2006) teodord $
40  */
41 public class JRBeanCollectionDataSource extends JRAbstractBeanDataSource
42 {
43     
44
45     /**
46      *
47      */
48     private Collection JavaDoc data = null;
49     private Iterator JavaDoc iterator = null;
50     private Object JavaDoc currentBean = null;
51     
52
53     /**
54      *
55      */
56     public JRBeanCollectionDataSource(Collection JavaDoc beanCollection)
57     {
58         this(beanCollection, true);
59     }
60     
61
62     /**
63      *
64      */
65     public JRBeanCollectionDataSource(Collection JavaDoc beanCollection, boolean isUseFieldDescription)
66     {
67         super(isUseFieldDescription);
68         
69         this.data = beanCollection;
70
71         if (this.data != null)
72         {
73             this.iterator = this.data.iterator();
74         }
75     }
76     
77
78     /**
79      *
80      */
81     public boolean next()
82     {
83         boolean hasNext = false;
84         
85         if (this.iterator != null)
86         {
87             hasNext = this.iterator.hasNext();
88             
89             if (hasNext)
90             {
91                 this.currentBean = this.iterator.next();
92             }
93         }
94         
95         return hasNext;
96     }
97     
98     
99     /**
100      *
101      */
102     public Object JavaDoc getFieldValue(JRField field) throws JRException
103     {
104         return getFieldValue(currentBean, field);
105     }
106
107     
108     /**
109      *
110      */
111     public void moveFirst()
112     {
113         if (this.data != null)
114         {
115             this.iterator = this.data.iterator();
116         }
117     }
118
119
120 }
121
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