Source code: jbreport/core/QueryBoundResult.java
1 /*
2 * $Id: QueryBoundResult.java,v 1.1 2000/08/31 13:53:17 grantfin Exp $
3 *
4 * jbReport - A reporting library for Java
5 * Copyright (C) 2000 Grant Finnemore <grantfin@users.sourceforge.net>
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21 package jbreport.core;
22
23 import org.xml.sax.Attributes;
24
25 import jbreport.ReportException;
26 import jbreport.data.QueryResult;
27
28 /**
29 * This is used to get a particular cell of data from the results of the query
30 * to the datasource. It would normally be used to present information during
31 * section breaks.
32 *
33 * @author Grant Finnemore
34 * @version $Revision: 1.1 $
35 */
36 class QueryBoundResult extends AbstractReportElement {
37
38 /** The identifier of the query result column that we will bind to */
39 private String id;
40
41 /** The current value of the bound element */
42 private String value;
43
44 //
45 // Constructors
46 //
47
48 //
49 // Methods overloaded from AbstractReportElement
50 //
51
52 public void accept(ReportVisitor visitor, ReportVisitorState state)
53 throws ReportException {
54 visitor.visitQueryBoundResult(this, state);
55 }
56
57 public String getString(String property, String defaultValue)
58 throws ReportException {
59
60 String result = defaultValue;
61 if("value".equals(property)) {
62 result = value;
63 }
64 else {
65 result = super.getString(property, defaultValue);
66 }
67 return result;
68 }
69
70 public void updateData(QueryResult queryResult) throws ReportException {
71 value = queryResult.getString(id);
72 }
73
74 public void xmlInitialize(String localName, Attributes attributes)
75 throws ReportException {
76
77 super.xmlInitialize(localName, attributes);
78 id = attributes.getValue("id");
79 assertNotNull(id, "id");
80 }
81 }