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: LazyNameMap.java 3525 2007-10-16 11:43:48Z tmorgner $ 027 * ------------ 028 * (C) Copyright 2000-2005, by Object Refinery Limited. 029 * (C) Copyright 2005-2007, by Pentaho Corporation. 030 */ 031 package org.jfree.report.util; 032 033 import java.util.ArrayList; 034 import java.util.HashMap; 035 036 /** 037 * Creation-Date: 06.03.2006, 20:20:17 038 * 039 * @author Thomas Morgner 040 */ 041 public class LazyNameMap implements Cloneable 042 { 043 public static class NameCarrier 044 { 045 private int value; 046 private int counter; 047 048 public NameCarrier(final int value) 049 { 050 this.value = value; 051 this.counter = 1; 052 } 053 054 public int getValue() 055 { 056 return value; 057 } 058 059 public int getInstanceCount() 060 { 061 return counter; 062 } 063 064 public void increase() 065 { 066 this.counter += 1; 067 } 068 069 public void decrease() 070 { 071 this.counter -= 1; 072 } 073 } 074 075 private HashMap map; 076 private ArrayList names; 077 private boolean clean; 078 079 public LazyNameMap() 080 { 081 map = new HashMap(); 082 names = new ArrayList(); 083 clean = false; 084 } 085 086 public boolean isClean() 087 { 088 return clean; 089 } 090 091 public void setValue(final String key, final int value) 092 { 093 if (clean) 094 { 095 map = (HashMap) map.clone(); 096 names = (ArrayList) names.clone(); 097 clean = false; 098 } 099 100 map.put(key, new NameCarrier(value)); 101 } 102 103 public NameCarrier get(final String key) 104 { 105 return (NameCarrier) map.get(key); 106 } 107 108 public NameCarrier remove(final String key) 109 { 110 final NameCarrier nc = (NameCarrier) map.get(key); 111 if (nc == null) 112 { 113 return null; 114 } 115 116 if (clean) 117 { 118 map = (HashMap) map.clone(); 119 names = (ArrayList) names.clone(); 120 clean = false; 121 } 122 return (NameCarrier) map.remove(key); 123 } 124 125 public Object clone() 126 { 127 try 128 { 129 final LazyNameMap lm = (LazyNameMap) super.clone(); 130 lm.clean = true; 131 clean = true; 132 return lm; 133 } 134 catch (CloneNotSupportedException e) 135 { 136 throw new IllegalStateException("Clone failed for some reason"); 137 } 138 } 139 }