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: * ToLowerCaseStringExpression.java
27: * ------------
28: * (C) Copyright 2001-2007, by Object Refinery Ltd, Pentaho Corporation and Contributors.
29: */package org.jfree.report.function.strings;
30:
31: import org.jfree.report.ResourceBundleFactory;
32: import org.jfree.report.function.AbstractExpression;
33:
34: /**
35: * A expression that transforms all letters of a given string into lower-case letters.
36: *
37: * @author Thomas Morgner
38: */
39: public class ToLowerCaseStringExpression extends AbstractExpression {
40: /**
41: * The field name from where to read the string that should be converted to lower case.
42: */
43: private String field;
44:
45: /**
46: * Default Constructor.
47: */
48: public ToLowerCaseStringExpression() {
49: }
50:
51: /**
52: * Returns the name of the datarow-column from where to read the string value.
53: *
54: * @return the field.
55: */
56: public String getField() {
57: return field;
58: }
59:
60: /**
61: * Defines the name of the datarow-column from where to read the string value.
62: *
63: * @param field the field.
64: */
65: public void setField(final String field) {
66: this .field = field;
67: }
68:
69: /**
70: * Transforms the string that has been read from the defined field.
71: *
72: * @return the value of the function.
73: */
74: public Object getValue() {
75: final Object raw = getDataRow().get(getField());
76: if (raw == null) {
77: return null;
78: }
79: final String text = String.valueOf(raw);
80: final ResourceBundleFactory rf = getResourceBundleFactory();
81: if (rf == null) {
82: return text.toLowerCase();
83: } else {
84: return text.toLowerCase(rf.getLocale());
85: }
86: }
87: }
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