01: /**
02: * ========================================
03: * JFreeReport : a free Java report library
04: * ========================================
05: *
06: * Project Info: http://reporting.pentaho.org/
07: *
08: * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors.
09: *
10: * This library is free software; you can redistribute it and/or modify it under the terms
11: * of the GNU Lesser General Public License as published by the Free Software Foundation;
12: * either 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, but WITHOUT ANY WARRANTY;
15: * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
16: * See the GNU Lesser General Public License for more details.
17: *
18: * You should have received a copy of the GNU Lesser General Public License along with this
19: * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
20: * Boston, MA 02111-1307, USA.
21: *
22: * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
23: * in the United States and other countries.]
24: *
25: * ------------
26: * $Id: PrecomputedExpressionSlot.java 3525 2007-10-16 11:43:48Z tmorgner $
27: * ------------
28: * (C) Copyright 2000-2005, by Object Refinery Limited.
29: * (C) Copyright 2005-2007, by Pentaho Corporation.
30: */package org.jfree.report.data;
31:
32: import org.jfree.report.DataRow;
33: import org.jfree.report.DataSourceException;
34:
35: /**
36: * Creation-Date: 25.11.2006, 15:18:58
37: *
38: * @author Thomas Morgner
39: */
40: public class PrecomputedExpressionSlot implements ExpressionSlot {
41: private String name;
42: private Object value;
43: private boolean preserve;
44:
45: public PrecomputedExpressionSlot(final String name,
46: final Object value, final boolean preserve) {
47: this .preserve = preserve;
48: this .name = name;
49: this .value = value;
50: }
51:
52: public Object getValue() throws DataSourceException {
53: return value;
54: }
55:
56: public void advance() throws DataSourceException {
57: // does nothing ...
58: }
59:
60: public void updateDataRow(final DataRow dataRow) {
61: // does nothing ...
62: }
63:
64: public String getName() {
65: return name;
66: }
67:
68: public boolean isDeepTraversing() {
69: return false;
70: }
71:
72: /**
73: * Returns a clone of the object.
74: *
75: * @return A clone.
76: * @throws CloneNotSupportedException if cloning is not supported for some
77: * reason.
78: */
79: public Object clone() throws CloneNotSupportedException {
80: return super .clone();
81: }
82:
83: public boolean isPreserve() {
84: return preserve;
85: }
86:
87: }
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