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: AttributeNameGenerator.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;
31:
32: import java.util.HashMap;
33:
34: /**
35: * Creation-Date: 21.11.2006, 13:24:41
36: *
37: * @author Thomas Morgner
38: */
39: public class AttributeNameGenerator {
40: private HashMap names;
41:
42: public AttributeNameGenerator() {
43: names = new HashMap();
44: }
45:
46: public String generateName(final String base) {
47: final Long keyObject = (Long) names.get(base);
48: if (keyObject == null) {
49: names.put(base, new Long(0));
50: return base;
51: } else {
52: long keyIdx = keyObject.longValue();
53: String newName = base + keyIdx;
54: while (names.containsKey(newName)) {
55: keyIdx += 1;
56: newName = base + keyIdx;
57: }
58:
59: names.put(newName, new Long(0));
60: names.put(base, new Long(keyIdx));
61: return newName;
62: }
63: }
64:
65: public void reset() {
66: names.clear();
67: }
68: }
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