001 /**
002 * ========================================
003 * JFreeReport : a free Java report library
004 * ========================================
005 *
006 * Project Info: http://reporting.pentaho.org/
007 *
008 * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors.
009 *
010 * This library is free software; you can redistribute it and/or modify it under the terms
011 * of the GNU Lesser General Public License as published by the Free Software Foundation;
012 * either version 2.1 of the License, or (at your option) any later version.
013 *
014 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
015 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
016 * See the GNU Lesser General Public License for more details.
017 *
018 * You should have received a copy of the GNU Lesser General Public License along with this
019 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
020 * Boston, MA 02111-1307, USA.
021 *
022 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
023 * in the United States and other countries.]
024 *
025 * ------------
026 * $Id: AttributeNameGenerator.java,v 1.3 2007/04/01 18:49:33 taqua Exp $
027 * ------------
028 * (C) Copyright 2000-2005, by Object Refinery Limited.
029 * (C) Copyright 2005-2007, by Pentaho Corporation.
030 */
031
032 package org.jfree.report.util;
033
034 import java.util.HashMap;
035
036 /**
037 * Creation-Date: 21.11.2006, 13:24:41
038 *
039 * @author Thomas Morgner
040 */
041 public class AttributeNameGenerator
042 {
043 private HashMap names;
044
045 public AttributeNameGenerator()
046 {
047 names = new HashMap();
048 }
049
050 public String generateName (final String base)
051 {
052 final Long keyObject = (Long) names.get(base);
053 if (keyObject == null)
054 {
055 names.put (base, new Long(0));
056 return base;
057 }
058 else
059 {
060 long keyIdx = keyObject.longValue();
061 String newName = base + keyIdx;
062 while (names.containsKey(newName))
063 {
064 keyIdx += 1;
065 newName = base + keyIdx;
066 }
067
068 names.put (newName, new Long (0));
069 names.put (base, new Long (keyIdx));
070 return newName;
071 }
072 }
073
074 public void reset ()
075 {
076 names.clear();
077 }
078 }