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1: /** 2: * ======================================== 3: * JFreeReport : a free Java report library 4: * ======================================== 5: * 6: * Project Info: http://reporting.pentaho.org/ 7: * 8: * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors. 9: * 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 2725 2007-04-01 18:49:29Z taqua $ 27: * ------------ 28: * (C) Copyright 2000-2005, by Object Refinery Limited. 29: * (C) Copyright 2005-2007, by Pentaho Corporation. 30: */ 31: 32: package org.jfree.report.util; 33: 34: import java.util.HashMap; 35: 36: /** 37: * Creation-Date: 21.11.2006, 13:24:41 38: * 39: * @author Thomas Morgner 40: */ 41: public class AttributeNameGenerator 42: { 43: private HashMap names; 44: 45: public AttributeNameGenerator() 46: { 47: names = new HashMap(); 48: } 49: 50: public String generateName (final String base) 51: { 52: final Long keyObject = (Long) names.get(base); 53: if (keyObject == null) 54: { 55: names.put (base, new Long(0)); 56: return base; 57: } 58: else 59: { 60: long keyIdx = keyObject.longValue(); 61: String newName = base + keyIdx; 62: while (names.containsKey(newName)) 63: { 64: keyIdx += 1; 65: newName = base + keyIdx; 66: } 67: 68: names.put (newName, new Long (0)); 69: names.put (base, new Long (keyIdx)); 70: return newName; 71: } 72: } 73: 74: public void reset () 75: { 76: names.clear(); 77: } 78: }