svn-gvsig-desktop / tags / v1_0_2_Build_903 / applications / appgvSIG / src / com / vividsolutions / jump / util / OrderedMap.java @ 10704
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1 | 312 | fernando | |
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2 | /*
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3 | * The Unified Mapping Platform (JUMP) is an extensible, interactive GUI
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4 | * for visualizing and manipulating spatial features with geometry and attributes.
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5 | *
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6 | * Copyright (C) 2003 Vivid Solutions
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7 | *
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8 | * This program is free software; you can redistribute it and/or
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9 | * modify it under the terms of the GNU General Public License
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10 | * as published by the Free Software Foundation; either version 2
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11 | * of the License, or (at your option) any later version.
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12 | *
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13 | * This program is distributed in the hope that it will be useful,
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14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 | * GNU General Public License for more details.
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17 | *
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18 | * You should have received a copy of the GNU General Public License
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19 | * along with this program; if not, write to the Free Software
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20 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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21 | *
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22 | * For more information, contact:
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23 | *
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24 | * Vivid Solutions
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25 | * Suite #1A
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26 | * 2328 Government Street
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27 | * Victoria BC V8T 5G5
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28 | * Canada
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29 | *
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30 | * (250)385-6040
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31 | * www.vividsolutions.com
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32 | */
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33 | |||
34 | package com.vividsolutions.jump.util; |
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35 | |||
36 | 8765 | jjdelcerro | import java.util.ArrayList; |
37 | import java.util.Collection; |
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38 | import java.util.HashMap; |
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39 | import java.util.Iterator; |
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40 | import java.util.List; |
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41 | import java.util.Map; |
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42 | import java.util.Set; |
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43 | 312 | fernando | |
44 | |||
45 | /**
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46 | * A Map that preserves the order of its keys.
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47 | */
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48 | public class OrderedMap implements Map { |
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49 | private Map map; |
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50 | private List keyList; |
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51 | |||
52 | /**
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53 | * Creates an OrderedMap backed by the given map.
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54 | * @param map a Map that will be this OrderedMap's underlying Map
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55 | */
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56 | public OrderedMap(List keyList, Map map) { |
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57 | this.keyList = keyList;
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58 | this.map = map;
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59 | } |
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60 | |||
61 | /**
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62 | * Creates an OrderedMap.
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63 | */
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64 | public OrderedMap() {
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65 | this(new HashMap()); |
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66 | } |
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67 | |||
68 | public OrderedMap(Map map) { |
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69 | this(new UniqueList(), map); |
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70 | } |
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71 | |||
72 | public int size() { |
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73 | return map.size();
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74 | } |
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75 | |||
76 | public boolean isEmpty() { |
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77 | return map.isEmpty();
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78 | } |
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79 | |||
80 | public boolean containsKey(Object key) { |
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81 | return map.containsKey(key);
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82 | } |
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83 | |||
84 | public boolean containsValue(Object value) { |
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85 | return map.containsValue(value);
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86 | } |
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87 | |||
88 | public Object get(Object key) { |
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89 | return map.get(key);
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90 | } |
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91 | |||
92 | public Object put(Object key, Object value) { |
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93 | keyList.add(key); |
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94 | |||
95 | return map.put(key, value);
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96 | } |
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97 | |||
98 | public Object remove(Object key) { |
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99 | keyList.remove(key); |
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100 | |||
101 | return map.remove(key);
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102 | } |
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103 | |||
104 | public void putAll(Map t) { |
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105 | keyList.addAll(t.keySet()); |
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106 | map.putAll(t); |
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107 | } |
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108 | |||
109 | public void clear() { |
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110 | keyList.clear(); |
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111 | map.clear(); |
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112 | } |
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113 | |||
114 | public Set keySet() { |
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115 | return map.keySet();
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116 | } |
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117 | |||
118 | /**
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119 | * Returns the keys, in order.
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120 | * @return the keys in the order they were (first) added
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121 | */
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122 | public List keyList() { |
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123 | return keyList;
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124 | } |
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125 | |||
126 | /**
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127 | * Returns the values.
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128 | * @return the values in the same order as the keys
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129 | * @see #keyList()
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130 | */
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131 | public List valueList() { |
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132 | return (List) values(); |
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133 | } |
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134 | |||
135 | /**
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136 | * Returns the values.
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137 | * @return the values in the same order as the keys
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138 | * @see #keyList()
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139 | */
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140 | public Collection values() { |
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141 | ArrayList values = new ArrayList(); |
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142 | |||
143 | for (Iterator i = keyList.iterator(); i.hasNext();) { |
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144 | Object key = i.next();
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145 | values.add(map.get(key)); |
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146 | } |
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147 | |||
148 | return values;
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149 | } |
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150 | |||
151 | public Set entrySet() { |
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152 | return map.entrySet();
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153 | } |
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154 | |||
155 | public boolean equals(Object o) { |
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156 | return map.equals(o);
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157 | } |
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158 | } |