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annotate core/src/luan/LuanTable.java @ 427:dae264ad6a7b

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fix LuanTable.put() to use metatables
author Franklin Schmidt <fschmidt@gmail.com>
date Fri, 01 May 2015 19:29:07 -0600
parents 23a93c118042
children df95199ca4c0
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1 package luan;
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3 import java.util.Iterator;
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4 import java.util.ListIterator;
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5 import java.util.Map;
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6 import java.util.AbstractMap;
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7 import java.util.LinkedHashMap;
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8 import java.util.List;
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9 import java.util.ArrayList;
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10 import java.util.Collections;
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11 import java.util.Comparator;
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12 import java.util.Set;
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13 import java.util.HashSet;
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14 import java.util.IdentityHashMap;
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15 import java.util.regex.Pattern;
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17
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18 public final class LuanTable implements Iterable<Map.Entry<Object,Object>>, DeepCloneable<LuanTable> {
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19 private Map<Object,Object> map = null;
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20 private List<Object> list = null;
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21 private LuanTable metatable = null;
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22 private boolean hasJava = false;
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23
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24 public LuanTable() {}
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25
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26 public LuanTable(List<Object> list) {
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27 this.list = list;
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28 this.map = newMap();
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29 map.put("n",list.size());
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30 for( int i=0; i<list.size(); i++ ) {
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31 if( list.get(i) == null ) {
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32 listToMap(i);
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33 break;
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34 }
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35 }
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36 }
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37
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38 LuanTable(Map<Object,Object> map) {
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39 map.remove(null);
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40 for( Iterator<Object> i=map.values().iterator(); i.hasNext(); ) {
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41 if( i.next() == null )
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42 i.remove();
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43 }
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44 this.map = map;
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45 }
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46
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47 LuanTable(Set<Object> set) {
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48 map = newMap();
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49 for( Object obj : set ) {
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50 if( obj != null )
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51 map.put(obj,Boolean.TRUE);
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52 }
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53 }
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54
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55 public LuanTable(LuanTable tbl) {
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56 if( tbl.map != null && !tbl.map.isEmpty() )
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57 this.map = new LinkedHashMap<Object,Object>(tbl.map);
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58 if( tbl.length() > 0 )
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59 this.list = new ArrayList<Object>(tbl.list);
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60 this.metatable = tbl.metatable;
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61 }
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62
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63 @Override public LuanTable shallowClone() {
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64 return new LuanTable();
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65 }
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66
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67 @Override public void deepenClone(LuanTable clone,DeepCloner cloner) {
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68 if( map != null ) {
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69 clone.map = newMap();
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70 for( Map.Entry<Object,Object> entry : map.entrySet() ) {
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71 clone.map.put( cloner.get(entry.getKey()), cloner.get(entry.getValue()) );
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72 }
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73 }
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74 if( list != null ) {
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75 clone.list = new ArrayList<Object>();
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76 for( Object obj : list ) {
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77 clone.list.add( cloner.get(obj) );
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78 }
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79 }
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80 if( metatable != null )
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81 clone.metatable = cloner.get(metatable);
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82 clone.hasJava = hasJava;
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83 }
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84
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85 public boolean isList() {
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86 return map==null || map.isEmpty();
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87 }
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88
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89 public List<Object> asList() {
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90 return list!=null ? list : Collections.emptyList();
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91 }
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92
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93 public Object get(LuanState luan,Object key) throws LuanException {
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94 Object value = rawGet(key);
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95 if( value != null )
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96 return value;
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97 Object h = getHandler("__index");
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98 if( h==null )
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99 return null;
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100 if( h instanceof LuanFunction ) {
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101 LuanFunction fn = (LuanFunction)h;
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102 return Luan.first(luan.call(fn,"__index",new Object[]{this,key}));
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103 }
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104 if( h instanceof LuanMeta ) {
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105 LuanMeta meta = (LuanMeta)h;
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106 return meta.__index(luan,this,key);
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107 }
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108 if( h instanceof LuanTable ) {
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109 LuanTable tbl = (LuanTable)h;
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110 return tbl.get(luan,key);
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111 }
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112 throw luan.exception("invalid type "+Luan.type(h)+" for metamethod __index");
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113 }
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114
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115 public Object rawGet(Object key) {
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116 if( list != null ) {
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117 Integer iT = Luan.asInteger(key);
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118 if( iT != null ) {
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119 int i = iT - 1;
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120 if( i>=0 && i<list.size() )
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121 return list.get(i);
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122 }
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123 }
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124 if( map==null )
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125 return null;
1
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126 return map.get(key);
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127 }
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128
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129 public void put(LuanState luan,Object key,Object value) throws LuanException {
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130 Object h = getHandler("__newindex");
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131 if( h==null || rawGet(key)!=null ) {
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132 rawPut(key,value);
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133 return;
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134 }
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135 if( h instanceof LuanFunction ) {
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136 LuanFunction fn = (LuanFunction)h;
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137 luan.call(fn,"__newindex",new Object[]{this,key,value});
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138 return;
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139 }
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140 if( h instanceof LuanMeta ) {
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141 LuanMeta meta = (LuanMeta)h;
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142 meta.__newindex(luan,this,key,value);
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143 return;
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144 }
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145 if( h instanceof LuanTable ) {
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146 LuanTable tbl = (LuanTable)h;
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147 tbl.put(luan,key,value);
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148 return;
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149 }
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150 throw luan.exception("invalid type "+Luan.type(h)+" for metamethod __newindex");
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151 }
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152
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153 public void rawPut(Object key,Object val) {
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154 Integer iT = Luan.asInteger(key);
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155 if( iT != null ) {
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156 int i = iT - 1;
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157 if( list != null || i == 0 ) {
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158 if( i == list().size() ) {
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159 if( val != null ) {
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160 list.add(val);
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161 mapToList();
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162 }
224
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163 return;
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164 } else if( i>=0 && i<list.size() ) {
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165 list.set(i,val);
118
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166 if( val == null ) {
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diff changeset
167 listToMap(i);
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168 }
224
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169 return;
44
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170 }
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171 }
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172 }
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173 if( map==null ) {
284
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diff changeset
174 map = newMap();
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175 }
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176 if( key instanceof Number && !(key instanceof Double) ) {
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177 Number n = (Number)key;
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178 key = Double.valueOf(n.doubleValue());
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179 }
1
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180 if( val == null ) {
224
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diff changeset
181 map.remove(key);
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182 } else {
224
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diff changeset
183 map.put(key,val);
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184 }
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185 }
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186
47
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187 private void mapToList() {
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188 if( map != null ) {
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189 while(true) {
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190 Object v = map.remove(Double.valueOf(list.size()+1));
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191 if( v == null )
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192 break;
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193 list.add(v);
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194 }
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195 }
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196 }
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diff changeset
197
118
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198 private void listToMap(int from) {
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199 if( list != null ) {
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diff changeset
200 while( list.size() > from ) {
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diff changeset
201 int i = list.size() - 1;
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diff changeset
202 Object v = list.remove(i);
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diff changeset
203 if( v != null ) {
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diff changeset
204 if( map==null )
284
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diff changeset
205 map = newMap();
118
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206 map.put(i+1,v);
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207 }
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208 }
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diff changeset
209 }
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210 }
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diff changeset
211
47
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diff changeset
212 private List<Object> list() {
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213 if( list == null ) {
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214 list = new ArrayList<Object>();
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215 mapToList();
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216 }
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217 return list;
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218 }
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diff changeset
219
408
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diff changeset
220 public void insert(int pos,Object value) {
108
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diff changeset
221 if( value==null )
222
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diff changeset
222 throw new IllegalArgumentException("can't insert a nil value");
47
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diff changeset
223 list().add(pos-1,value);
108
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diff changeset
224 mapToList();
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225 }
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diff changeset
226
408
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diff changeset
227 public void add(Object value) {
108
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diff changeset
228 if( value==null )
222
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diff changeset
229 throw new IllegalArgumentException("can't add a nil value");
108
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230 list().add(value);
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231 mapToList();
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232 }
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233
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234 public Object remove(int pos) {
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235 return list().remove(pos-1);
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236 }
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237
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238 public void sort(Comparator<Object> cmp) {
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239 Collections.sort(list(),cmp);
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240 }
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241
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242 public int length() {
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243 return list==null ? 0 : list.size();
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244 }
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245
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246 @Override public Iterator<Map.Entry<Object,Object>> iterator() {
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247 if( list == null ) {
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248 if( map == null )
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249 return Collections.<Map.Entry<Object,Object>>emptyList().iterator();
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250 return map.entrySet().iterator();
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251 }
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252 if( map == null )
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253 return listIterator();
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254 return new Iterator<Map.Entry<Object,Object>>() {
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255 Iterator<Map.Entry<Object,Object>> iter = listIterator();
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256 boolean isList = true;
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257 public boolean hasNext() {
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258 boolean b = iter.hasNext();
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259 if( !b && isList ) {
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260 iter = map.entrySet().iterator();
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261 isList = false;
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262 b = iter.hasNext();
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263 }
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264 return b;
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265 }
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266 public Map.Entry<Object,Object> next() {
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267 return iter.next();
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268 }
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269 public void remove() {
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270 throw new UnsupportedOperationException();
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271 }
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272 };
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273 }
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274
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275 private Iterator<Map.Entry<Object,Object>> listIterator() {
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276 if( list == null )
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277 return Collections.<Map.Entry<Object,Object>>emptyList().iterator();
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278 final ListIterator iter = list.listIterator();
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279 return new Iterator<Map.Entry<Object,Object>>() {
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280 public boolean hasNext() {
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281 return iter.hasNext();
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282 }
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283 public Map.Entry<Object,Object> next() {
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284 Double key = Double.valueOf(iter.nextIndex()+1);
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285 return new AbstractMap.SimpleEntry<Object,Object>(key,iter.next());
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286 }
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287 public void remove() {
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288 throw new UnsupportedOperationException();
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289 }
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290 };
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291 }
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292
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293 public LuanTable subList(int from,int to) {
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294 LuanTable tbl = shallowClone();
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295 tbl.list = new ArrayList<Object>(list().subList(from-1,to-1));
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296 return tbl;
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297 }
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298
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299 public LuanTable getMetatable() {
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300 return metatable;
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301 }
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302
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303 public void setMetatable(LuanTable metatable) {
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304 this.metatable = metatable;
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305 }
300
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306
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307 public Object getHandler(String op) {
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308 LuanTable t = getMetatable();
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309 return t==null ? null : t.rawGet(op);
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310 }
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311
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312 public boolean hasJava() {
300
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313 return hasJava;
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314 }
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315
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316 public void setJava() {
300
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317 hasJava = true;
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318 }
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319
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320
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321 // from AbstractLuanTable
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322
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323 protected final Map<Object,Object> newMap() {
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324 return new LinkedHashMap<Object,Object>();
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325 }
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326
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327 public boolean isEmpty() {
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328 return isList() && length()==0;
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329 }
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330
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331 public boolean isSet() {
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332 for( Map.Entry<Object,Object> entry : this ) {
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333 if( !entry.getValue().equals(Boolean.TRUE) )
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334 return false;
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335 }
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336 return true;
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337 }
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338
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339 public Set<Object> asSet() {
406
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340 Set<Object> set = new HashSet<Object>();
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341 for( Map.Entry<Object,Object> entry : this ) {
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342 set.add(entry.getKey());
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343 }
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344 return set;
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345 }
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346
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347 public Map<Object,Object> asMap() {
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348 Map<Object,Object> map = newMap();
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349 for( Map.Entry<Object,Object> entry : this ) {
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350 map.put(entry.getKey(),entry.getValue());
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351 }
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352 return map;
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353 }
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354
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355 @Override public final String toString() {
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af82b266fe89 add Io.repr()
Franklin Schmidt <fschmidt@gmail.com>
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356 return "table: " + Integer.toHexString(hashCode());
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Franklin Schmidt <fschmidt@gmail.com>
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357 }
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358
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2df768b926aa start Luan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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359 }