01: /**
02: * ===========================================
03: * JFreeReport : a free Java reporting library
04: * ===========================================
05: *
06: * Project Info: http://reporting.pentaho.org/
07: *
08: * (C) Copyright 2001-2007, by Object Refinery Ltd, 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: * OrExpression.java
27: * ------------
28: * (C) Copyright 2001-2007, by Object Refinery Ltd, Pentaho Corporation and Contributors.
29: */package org.jfree.report.function.bool;
30:
31: import org.jfree.report.function.ColumnAggregationExpression;
32:
33: /**
34: * Computes the logical OR of all fields given. Non-boolean values are ignored and have no
35: * influence on the result.
36: *
37: * @author Thomas Morgner
38: */
39: public class OrExpression extends ColumnAggregationExpression {
40: /**
41: * Default Constructor.
42: */
43: public OrExpression() {
44: }
45:
46: /**
47: * Computes the logical OR of all fields given. Non-boolean values are ignored and have no
48: * influence on the result.
49: *
50: * @return Boolean.TRUE or Boolean.FALSE
51: */
52: public Object getValue() {
53: final Object[] values = getFieldValues();
54: final int length = values.length;
55: if (length == 0) {
56: return Boolean.FALSE;
57: }
58:
59: for (int i = 0; i < length; i++) {
60: final Object value = values[i];
61: if (value instanceof Boolean == false) {
62: continue;
63: }
64:
65: final Boolean n = (Boolean) value;
66: if (n.equals(Boolean.TRUE)) {
67: return Boolean.TRUE;
68: }
69: }
70:
71: return Boolean.FALSE;
72: }
73: }
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