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: BeanPropertyLookupParser.java 3048 2007-07-28 18:02:42Z tmorgner $
27: * ------------
28: * (C) Copyright 2000-2005, by Object Refinery Limited.
29: * (C) Copyright 2005-2007, by Pentaho Corporation.
30: */package org.jfree.report.util.beans;
31:
32: import org.jfree.report.util.CSVTokenizer;
33: import org.jfree.report.util.PropertyLookupParser;
34:
35: public abstract class BeanPropertyLookupParser extends
36: PropertyLookupParser {
37: public BeanPropertyLookupParser() {
38: }
39:
40: /**
41: *
42: * @param name
43: * @return
44: */
45: protected abstract Object performInitialLookup(String name);
46:
47: protected String lookupVariable(final String entity) {
48: // first, split the entity into separate strings (separator is '.').
49:
50: final CSVTokenizer tokenizer = new CSVTokenizer(entity, ".");
51: if (tokenizer.hasMoreTokens()) {
52: final String name = tokenizer.nextToken();
53: final Object base = performInitialLookup(name);
54: try {
55: if (tokenizer.hasMoreTokens()) {
56: return continueLookupVariable(tokenizer, base);
57: } else {
58: return ConverterRegistry.toAttributeValue(base);
59: }
60: } catch (BeanException e) {
61: return entity;
62: }
63: }
64: return entity;
65: }
66:
67: private static String continueLookupVariable(
68: final CSVTokenizer tokenizer, final Object parent)
69: throws BeanException {
70: if (tokenizer.hasMoreTokens()) {
71: final String name = tokenizer.nextToken();
72: final Object base = ConverterRegistry.toPropertyValue(name,
73: parent.getClass());
74: if (tokenizer.hasMoreTokens()) {
75: return continueLookupVariable(tokenizer, base);
76: } else {
77: return ConverterRegistry.toAttributeValue(base);
78: }
79: }
80: return null;
81: }
82:
83: }
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