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annotate core/src/luan/LuanTable.java @ 195:24ede40ee0aa

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make MetatableGetter DeepCloneable, scoped, and secure git-svn-id: https://luan-java.googlecode.com/svn/trunk@196 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Thu, 03 Jul 2014 08:19:48 +0000
parents 3dcb0f9bee82
children be0275bda373
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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2df768b926aa start Luan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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1 package luan;
2df768b926aa start Luan
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2
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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diff changeset
3 import java.util.Iterator;
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4 import java.util.ListIterator;
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2df768b926aa start Luan
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5 import java.util.Map;
2df768b926aa start Luan
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6 import java.util.HashMap;
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7 import java.util.List;
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8 import java.util.ArrayList;
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9 import java.util.Collections;
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10 import java.util.Comparator;
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11 import java.util.Set;
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12 import java.util.HashSet;
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cd9dbd7477ca prevent stack overflow when printing table with circular references
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13 import java.util.IdentityHashMap;
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6ca02b188dba add LuanBit to clean up code;
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14 import java.util.regex.Pattern;
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2df768b926aa start Luan
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15
2df768b926aa start Luan
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16
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17 public final class LuanTable implements DeepCloneable<LuanTable>, Iterable<Map.Entry<Object,Object>>, LuanRepr {
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18 private Map<Object,Object> map = null;
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19 private List<Object> list = null;
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20 private LuanTable metatable = null;
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21 public MetatableGetter metatableGetter = null; // used for modules
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22
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23 public LuanTable() {}
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24
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25 public LuanTable(LuanTable tbl) {
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26 if( tbl.map != null )
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27 this.map = new HashMap<Object,Object>(tbl.map);
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28 if( tbl.list != null )
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29 this.list = new ArrayList<Object>(tbl.list);
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30 }
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32 public LuanTable(List<Object> list) {
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33 this.list = list;
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34 this.map = new HashMap<Object,Object>();
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35 map.put("n",list.size());
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36 for( int i=0; i<list.size(); i++ ) {
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37 if( list.get(i) == null ) {
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38 listToMap(i);
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39 break;
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40 }
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41 }
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42 }
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2df768b926aa start Luan
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43
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44 public LuanTable(Map<Object,Object> map) {
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45 map.remove(null);
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46 for( Iterator<Object> i=map.values().iterator(); i.hasNext(); ) {
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47 if( i.next() == null )
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48 i.remove();
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49 }
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50 this.map = map;
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51 }
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52
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53 public LuanTable(Set<Object> set) {
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54 map = new HashMap<Object,Object>();
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55 for( Object obj : set ) {
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56 if( obj != null )
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57 map.put(obj,Boolean.TRUE);
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58 }
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59 }
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60
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61 @Override public LuanTable shallowClone() {
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62 return new LuanTable();
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63 }
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64
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65 @Override public void deepenClone(LuanTable clone,DeepCloner cloner) {
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66 clone.metatableGetter = this.metatableGetter;
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67 if( map != null ) {
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68 clone.map = new HashMap<Object,Object>();
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69 for( Map.Entry<Object,Object> entry : map.entrySet() ) {
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70 clone.map.put( cloner.get(entry.getKey()), cloner.get(entry.getValue()) );
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71 }
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72 }
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73 if( list != null ) {
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74 clone.list = new ArrayList<Object>();
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75 for( Object obj : list ) {
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76 clone.list.add( cloner.get(obj) );
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77 }
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78 }
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79 if( metatable != null )
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80 clone.metatable = cloner.deepClone(metatable);
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81 }
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82
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83 public boolean isList() {
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84 return map==null || map.isEmpty();
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85 }
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86
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87 public List<Object> asList() {
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88 return list!=null ? list : Collections.emptyList();
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89 }
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90
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91 public Map<Object,Object> asMap() {
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92 if( list == null || list.isEmpty() )
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93 return map!=null ? map : Collections.emptyMap();
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94 Map<Object,Object> rtn = map!=null ? new HashMap<Object,Object>(map) : new HashMap<Object,Object>();
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95 for( ListIterator iter = list.listIterator(); iter.hasNext(); ) {
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96 int i = iter.nextIndex();
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97 rtn.put(i+1,iter.next());
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98 }
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99 return rtn;
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100 }
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diff changeset
101
59
5c9cadd0acce move standard calls from CmdLine to LuanState
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102 public boolean isSet() {
47
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103 if( list != null ) {
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104 for( Object obj : list ) {
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diff changeset
105 if( obj!=null && !obj.equals(Boolean.TRUE) )
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diff changeset
106 return false;
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107 }
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108 }
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109 if( map != null ) {
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110 for( Object obj : map.values() ) {
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diff changeset
111 if( !obj.equals(Boolean.TRUE) )
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112 return false;
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113 }
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114 }
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115 return true;
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116 }
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diff changeset
117
59
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118 public Set<Object> asSet() {
47
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119 if( list == null || list.isEmpty() )
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120 return map!=null ? map.keySet() : Collections.emptySet();
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121 Set<Object> rtn = map!=null ? new HashSet<Object>(map.keySet()) : new HashSet<Object>();
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122 for( int i=1; i<=list.size(); i++ ) {
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diff changeset
123 rtn.add(i);
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124 }
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125 return rtn;
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126 }
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127
1
2df768b926aa start Luan
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128 @Override public String toString() {
81
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129 return "table: " + Integer.toHexString(hashCode());
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130 }
84
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diff changeset
131
147
cc3a0578edac fix Io.reverse_pickle
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132 @Override public String repr() {
88
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133 return repr( Collections.newSetFromMap(new IdentityHashMap<LuanTable,Boolean>()) );
72
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134 }
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diff changeset
135
88
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136 private String repr(Set<LuanTable> set) {
72
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diff changeset
137 if( !set.add(this) ) {
88
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diff changeset
138 return "\"<circular reference>\"";
72
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139 }
47
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diff changeset
140 StringBuilder sb = new StringBuilder();
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diff changeset
141 sb.append('{');
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diff changeset
142 boolean isFirst = true;
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diff changeset
143 if( list != null ) {
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144 boolean gotNull = false;
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diff changeset
145 for( int i=0; i<list.size(); i++ ) {
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diff changeset
146 Object obj = list.get(i);
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147 if( obj==null ) {
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diff changeset
148 gotNull = true;
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diff changeset
149 } else {
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150 if( isFirst ) {
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diff changeset
151 isFirst = false;
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diff changeset
152 } else {
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diff changeset
153 sb.append(", ");
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154 }
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diff changeset
155 if( gotNull )
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diff changeset
156 sb.append(i+1).append('=');
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diff changeset
157 sb.append(repr(set,obj));
47
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158 }
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diff changeset
159 }
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diff changeset
160 }
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diff changeset
161 if( map != null ) {
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diff changeset
162 for( Map.Entry<Object,Object> entry : map.entrySet() ) {
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diff changeset
163 if( isFirst ) {
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diff changeset
164 isFirst = false;
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diff changeset
165 } else {
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diff changeset
166 sb.append(", ");
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diff changeset
167 }
88
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diff changeset
168 sb.append(reprKey(set,entry.getKey())).append('=').append(repr(set,entry.getValue()));
47
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diff changeset
169 }
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170 }
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diff changeset
171 sb.append('}');
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diff changeset
172 return sb.toString();
1
2df768b926aa start Luan
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173 }
2df768b926aa start Luan
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174
88
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175 private static final Pattern namePtn = Pattern.compile("[a-zA-Z_][a-zA-Z_0-9]*");
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diff changeset
176
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diff changeset
177 private static String reprKey(Set<LuanTable> set,Object obj) {
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178 if( obj instanceof String ) {
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179 String s = (String)obj;
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diff changeset
180 if( namePtn.matcher(s).matches() )
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181 return s;
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182 }
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183 return "[" + repr(set,obj) + "]";
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184 }
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185
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diff changeset
186 private static String repr(Set<LuanTable> set,Object obj) {
72
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diff changeset
187 if( obj instanceof LuanTable ) {
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diff changeset
188 LuanTable t = (LuanTable)obj;
88
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diff changeset
189 return t.repr(set);
72
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diff changeset
190 } else {
88
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diff changeset
191 String s = Luan.repr(obj);
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diff changeset
192 if( s == null )
147
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diff changeset
193 s = "<couldn't repr: " + Luan.stringEncode(Luan.toString(obj)) + ">";
88
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194 return s;
72
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diff changeset
195 }
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diff changeset
196 }
84
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diff changeset
197
1
2df768b926aa start Luan
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198 public Object get(Object key) {
46
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diff changeset
199 if( list != null ) {
48
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diff changeset
200 Integer iT = Luan.asInteger(key);
46
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diff changeset
201 if( iT != null ) {
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diff changeset
202 int i = iT - 1;
44
57054fa43189 implement table lib
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diff changeset
203 if( i>=0 && i<list.size() )
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diff changeset
204 return list.get(i);
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205 }
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206 }
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207 if( map==null )
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208 return null;
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209 return map.get(key);
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210 }
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211
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212 public Object put(Object key,Object val) {
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213 Integer iT = Luan.asInteger(key);
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214 if( iT != null ) {
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215 int i = iT - 1;
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216 if( list != null || i == 0 ) {
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217 if( i == list().size() ) {
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218 if( val != null ) {
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219 list.add(val);
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220 mapToList();
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221 }
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222 return null;
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223 } else if( i>=0 && i<list.size() ) {
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224 Object old = list.get(i);
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225 list.set(i,val);
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226 if( val == null ) {
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227 listToMap(i);
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228 }
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229 return old;
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230 }
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231 }
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232 }
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233 if( map==null ) {
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234 map = new HashMap<Object,Object>();
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235 }
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236 if( key instanceof Number && !(key instanceof Double) ) {
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237 Number n = (Number)key;
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238 key = Double.valueOf(n.doubleValue());
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239 }
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240 if( val == null ) {
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241 return map.remove(key);
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242 } else {
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243 return map.put(key,val);
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244 }
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245 }
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246
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247 private void mapToList() {
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248 if( map != null ) {
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249 while(true) {
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250 Object v = map.remove(Double.valueOf(list.size()+1));
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251 if( v == null )
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252 break;
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253 list.add(v);
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254 }
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255 }
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256 }
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257
118
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258 private void listToMap(int from) {
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259 if( list != null ) {
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260 while( list.size() > from ) {
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261 int i = list.size() - 1;
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262 Object v = list.remove(i);
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263 if( v != null ) {
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264 if( map==null )
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265 map = new HashMap<Object,Object>();
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266 map.put(i+1,v);
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267 }
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268 }
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269 }
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270 }
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271
47
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272 private List<Object> list() {
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273 if( list == null ) {
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274 list = new ArrayList<Object>();
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275 mapToList();
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276 }
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277 return list;
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278 }
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279
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280 public void insert(int pos,Object value) {
108
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281 if( value==null )
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282 throw new UnsupportedOperationException();
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283 list().add(pos-1,value);
108
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284 mapToList();
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285 }
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286
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287 public void add(Object value) {
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288 if( value==null )
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289 throw new UnsupportedOperationException();
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290 list().add(value);
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291 mapToList();
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292 }
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293
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294 public Object remove(int pos) {
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295 return list().remove(pos-1);
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296 }
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297
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298 public void sort(Comparator<Object> cmp) {
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299 Collections.sort(list(),cmp);
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300 }
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301
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302 public int length() {
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303 return list==null ? 0 : list.size();
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304 }
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305
27
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diff changeset
306 public Iterator<Map.Entry<Object,Object>> iterator() {
44
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307 if( list == null ) {
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308 if( map == null )
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309 return Collections.<Map.Entry<Object,Object>>emptyList().iterator();
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310 return map.entrySet().iterator();
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311 }
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312 if( map == null )
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313 return listIterator();
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314 return new Iterator<Map.Entry<Object,Object>>() {
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315 Iterator<Map.Entry<Object,Object>> iter = listIterator();
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316 boolean isList = true;
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317 public boolean hasNext() {
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318 boolean b = iter.hasNext();
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319 if( !b && isList ) {
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320 iter = map.entrySet().iterator();
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321 isList = false;
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322 b = iter.hasNext();
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323 }
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324 return b;
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325 }
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326 public Map.Entry<Object,Object> next() {
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327 return iter.next();
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328 }
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329 public void remove() {
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330 throw new UnsupportedOperationException();
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331 }
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332 };
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333 }
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334
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335 public Iterator<Map.Entry<Object,Object>> listIterator() {
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336 if( list == null )
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337 return Collections.<Map.Entry<Object,Object>>emptyList().iterator();
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338 final ListIterator iter = list.listIterator();
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339 return new Iterator<Map.Entry<Object,Object>>() {
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340 public boolean hasNext() {
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341 return iter.hasNext();
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342 }
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343 public Map.Entry<Object,Object> next() {
46
a443637829c1 remove LuaNumber
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344 Double key = Double.valueOf(iter.nextIndex()+1);
44
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345 return new MapEntry(key,iter.next());
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346 }
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347 public void remove() {
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348 throw new UnsupportedOperationException();
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349 }
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350 };
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351 }
118
735708619119 add Debug.debug()
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352 /*
44
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353 public Object[] listToArray() {
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354 return list==null ? new Object[0] : list.toArray();
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355 }
118
735708619119 add Debug.debug()
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356 */
48
64ecb7a3aad7 rename Lua to Luan
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357 public LuanTable subList(int from,int to) {
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358 return new LuanTable(new ArrayList<Object>(list().subList(from-1,to-1)));
27
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359 }
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360
48
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361 public LuanTable getMetatable() {
35
e51906de0f11 implement metatables
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362 return metatable;
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363 }
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364
48
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365 public void setMetatable(LuanTable metatable) {
35
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366 this.metatable = metatable;
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367 }
44
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368
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369 private static final class MapEntry implements Map.Entry<Object,Object> {
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370 private final Object key;
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371 private final Object value;
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372
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373 MapEntry(Object key,Object value) {
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374 this.key = key;
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375 this.value = value;
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376 }
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377
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378 @Override public Object getKey() {
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379 return key;
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380 }
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381
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382 @Override public Object getValue() {
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383 return value;
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384 }
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385
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386 @Override public Object setValue(Object value) {
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387 throw new UnsupportedOperationException();
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388 }
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389 }
1
2df768b926aa start Luan
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390 }