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annotate src/luan/LuanTable.java @ 782:655280eab1e2

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start limited cloning
author Franklin Schmidt <fschmidt@gmail.com>
date Tue, 30 Aug 2016 01:29:33 -0600
parents fbbdd369a13a
children 6a7c6879158d
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1 package luan;
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2
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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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15
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16 public final class LuanTable implements LuanCloneable {
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17 private Map map = null;
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18 private List list = null;
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19 private LuanTable metatable = null;
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20 public LuanJava java;
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21 private LuanCloner cloner;
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22
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23 private LuanTable(LuanCloner cloner) {
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24 this.cloner = cloner;
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25 }
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27 public LuanTable() {}
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28
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29 public LuanTable(List list) {
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30 int n = list.size();
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31 for( int i=0; i<n; i++ ) {
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32 Object val = list.get(i);
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33 if( val != null )
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34 rawPut(i+1,val);
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35 }
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36 }
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37
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38 public LuanTable(Map map) {
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39 for( Object stupid : map.entrySet() ) {
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40 Map.Entry entry = (Map.Entry)stupid;
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41 Object key = entry.getKey();
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42 Object value = entry.getValue();
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43 if( key != null && value != null )
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44 rawPut(key,value);
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45 }
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46 }
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47
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48 public LuanTable(Set set) {
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49 for( Object el : set ) {
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50 if( el != null )
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51 rawPut(el,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.rawLength() > 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(LuanCloner cloner) {
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64 return new LuanTable(cloner.deep ? null : cloner);
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65 }
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66
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67 @Override public void deepenClone(LuanCloneable dc,LuanCloner cloner) {
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68 LuanTable clone = (LuanTable)dc;
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69 if( map != null ) {
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70 clone.map = newMap();
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71 for( Object stupid : map.entrySet() ) {
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72 Map.Entry entry = (Map.Entry)stupid;
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73 Object val = entry.getValue();
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74 if( cloner.deep || !(val instanceof LuanTable) )
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75 val = cloner.get(val);
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76 clone.map.put( cloner.get(entry.getKey()), val );
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77 }
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78 }
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79 if( list != null ) {
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80 clone.list = new ArrayList<Object>();
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81 for( Object obj : list ) {
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82 if( cloner.deep || !(obj instanceof LuanTable) )
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83 obj = cloner.get(obj);
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84 clone.list.add(obj);
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85 }
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86 }
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87 clone.metatable = (LuanTable)cloner.clone(metatable);
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88 clone.java = (LuanJava)cloner.clone(java);
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89 }
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90
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91 public boolean isList() {
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92 return map==null || map.isEmpty();
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93 }
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94
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95 public List<Object> asList() {
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96 return list!=null ? list : Collections.emptyList();
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97 }
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98
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99 public String toString(LuanState luan) throws LuanException {
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100 Object h = getHandler("__to_string");
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101 if( h == null )
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102 return rawToString();
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103 if( h instanceof LuanMeta ) {
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104 LuanMeta meta = (LuanMeta)h;
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105 return meta.__to_string(luan,this);
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106 }
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107 LuanFunction fn = Luan.checkFunction(h);
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108 return Luan.checkString( Luan.first( fn.call(luan,new Object[]{this}) ) );
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109 }
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110
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111 public String rawToString() {
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112 return "table: " + Integer.toHexString(hashCode());
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113 }
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114
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115 public Object get(LuanState luan,Object key) throws LuanException {
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116 Object value = rawGet(key);
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117 if( value != null )
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118 return value;
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119 Object h = getHandler("__index");
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120 if( h==null )
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121 return null;
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122 if( h instanceof LuanFunction ) {
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123 LuanFunction fn = (LuanFunction)h;
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124 return Luan.first(fn.call(luan,new Object[]{this,key}));
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125 }
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126 if( h instanceof LuanMeta ) {
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127 LuanMeta meta = (LuanMeta)h;
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128 return meta.__index(luan,this,key);
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129 }
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130 return luan.index(h,key);
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131 }
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132
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133 public Object rawGet(Object key) {
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134 if( list != null ) {
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135 Integer iT = Luan.asInteger(key);
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136 if( iT != null ) {
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137 int i = iT - 1;
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138 if( i>=0 && i<list.size() )
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139 return list.get(i);
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140 }
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141 }
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142 if( map==null )
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143 return null;
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144 if( key instanceof Number && !(key instanceof Double) ) {
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145 Number n = (Number)key;
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146 key = Double.valueOf(n.doubleValue());
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147 }
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148 return map.get(key);
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149 }
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150
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151 public void put(LuanState luan,Object key,Object value) throws LuanException {
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152 Object h = getHandler("__new_index");
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153 if( h==null || rawGet(key)!=null ) {
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154 rawPut(key,value);
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155 return;
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156 }
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157 if( h instanceof LuanFunction ) {
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158 LuanFunction fn = (LuanFunction)h;
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159 fn.call(luan,new Object[]{this,key,value});
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160 return;
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161 }
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162 if( h instanceof LuanMeta ) {
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163 LuanMeta meta = (LuanMeta)h;
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164 meta.__new_index(luan,this,key,value);
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165 return;
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166 }
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167 if( h instanceof LuanTable ) {
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168 LuanTable tbl = (LuanTable)h;
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169 tbl.put(luan,key,value);
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170 return;
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171 }
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172 throw new LuanException("invalid type "+Luan.type(h)+" for metamethod __new_index");
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173 }
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174
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175 public void rawPut(Object key,Object val) {
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176 Integer iT = Luan.asInteger(key);
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177 if( iT != null ) {
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178 int i = iT - 1;
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179 if( list != null || i == 0 ) {
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180 if( i == list().size() ) {
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181 if( val != null ) {
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182 list.add(val);
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183 mapToList();
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184 }
224
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185 return;
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186 } else if( i>=0 && i<list.size() ) {
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187 list.set(i,val);
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188 if( val == null ) {
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189 listToMap(i);
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190 }
224
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191 return;
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192 }
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193 }
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194 }
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195 if( map==null )
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196 map = newMap();
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197 if( key instanceof Number && !(key instanceof Double) ) {
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198 Number n = (Number)key;
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199 key = Double.valueOf(n.doubleValue());
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200 }
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201 if( val == null ) {
224
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202 map.remove(key);
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203 } else {
224
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204 map.put(key,val);
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205 }
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206 }
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207
47
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208 private void mapToList() {
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209 if( map != null ) {
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210 while(true) {
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211 Object v = map.remove(Double.valueOf(list.size()+1));
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212 if( v == null )
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213 break;
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214 list.add(v);
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215 }
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216 }
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217 }
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218
118
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219 private void listToMap(int from) {
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220 if( list != null ) {
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221 while( list.size() > from ) {
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222 int i = list.size() - 1;
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223 Object v = list.remove(i);
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224 if( v != null ) {
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225 if( map==null )
284
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diff changeset
226 map = newMap();
118
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227 map.put(i+1,v);
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228 }
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229 }
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230 }
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231 }
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232
47
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diff changeset
233 private List<Object> list() {
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234 if( list == null ) {
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235 list = new ArrayList<Object>();
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236 mapToList();
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237 }
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238 return list;
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239 }
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240
431
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diff changeset
241 public void rawInsert(int pos,Object value) {
108
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diff changeset
242 if( value==null )
222
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diff changeset
243 throw new IllegalArgumentException("can't insert a nil value");
47
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diff changeset
244 list().add(pos-1,value);
108
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diff changeset
245 mapToList();
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246 }
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247
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diff changeset
248 public Object rawRemove(int pos) {
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249 return list().remove(pos-1);
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250 }
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251
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252 public void rawSort(Comparator<Object> cmp) {
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253 Collections.sort(list(),cmp);
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254 }
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255
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256 public int length(LuanState luan) throws LuanException {
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257 Object h = getHandler("__len");
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258 if( h != null ) {
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259 LuanFunction fn = Luan.checkFunction(h);
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260 return (Integer)Luan.first(fn.call(luan,new Object[]{this}));
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261 }
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262 return rawLength();
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263 }
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264
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265 public int rawLength() {
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266 return list==null ? 0 : list.size();
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267 }
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268
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269 public Iterable<Map.Entry<Object,Object>> iterable(LuanState luan) throws LuanException {
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270 final Iterator<Map.Entry<Object,Object>> iter = iterator(luan);
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271 return new Iterable<Map.Entry<Object,Object>>() {
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272 public Iterator<Map.Entry<Object,Object>> iterator() {
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273 return iter;
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274 }
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275 };
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276 }
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277
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278 public Iterable<Map.Entry<Object,Object>> rawIterable() throws LuanException {
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279 final Iterator<Map.Entry<Object,Object>> iter = rawIterator();
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280 return new Iterable<Map.Entry<Object,Object>>() {
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281 public Iterator<Map.Entry<Object,Object>> iterator() {
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282 return iter;
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283 }
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284 };
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285 }
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286
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287 public Iterator<Map.Entry<Object,Object>> iterator(final LuanState luan) throws LuanException {
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288 if( getHandler("__pairs") == null )
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289 return rawIterator();
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290 final LuanFunction fn = pairs(luan);
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291 return new Iterator<Map.Entry<Object,Object>>() {
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292 private Map.Entry<Object,Object> next = getNext();
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293
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294 private Map.Entry<Object,Object> getNext() {
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295 try {
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296 Object obj = fn.call(luan);
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297 if( obj==null )
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298 return null;
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299 Object[] a = (Object[])obj;
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300 if( a.length == 0 || a[0]==null )
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301 return null;
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302 return new AbstractMap.SimpleEntry<Object,Object>(a[0],a[1]);
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303 } catch(LuanException e) {
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304 throw new LuanRuntimeException(e);
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305 }
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306 }
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307
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308 public boolean hasNext() {
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309 return next != null;
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310 }
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311
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312 public Map.Entry<Object,Object> next() {
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313 Map.Entry<Object,Object> rtn = next;
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314 next = getNext();
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315 return rtn;
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316 }
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317
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318 public void remove() {
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319 throw new UnsupportedOperationException();
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320 }
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321 };
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322 }
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323
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324 public LuanFunction pairs(LuanState luan) throws LuanException {
432
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325 Object h = getHandler("__pairs");
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326 if( h != null ) {
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327 if( h instanceof LuanFunction ) {
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328 LuanFunction fn = (LuanFunction)h;
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329 Object obj = Luan.first(fn.call(luan,new Object[]{this}));
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330 if( !(obj instanceof LuanFunction) )
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331 throw new LuanException( "metamethod __pairs should return function but returned " + Luan.type(obj) );
432
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332 return (LuanFunction)obj;
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333 }
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334 if( h instanceof LuanMeta ) {
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335 LuanMeta meta = (LuanMeta)h;
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336 return meta.__pairs(luan,this);
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337 }
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338 throw new LuanException( "invalid type of metamethod __pairs: " + Luan.type(h) );
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339 }
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340 return rawPairs();
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341 }
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342
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343 private LuanFunction rawPairs() {
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344 return new LuanFunction() {
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345 final Iterator<Map.Entry<Object,Object>> iter = rawIterator();
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346
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347 @Override public Object[] call(LuanState luan,Object[] args) {
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348 if( !iter.hasNext() )
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349 return LuanFunction.NOTHING;
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350 Map.Entry<Object,Object> entry = iter.next();
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351 return new Object[]{entry.getKey(),entry.getValue()};
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352 }
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353 };
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354 }
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355
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356 public Iterator<Map.Entry<Object,Object>> rawIterator() {
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357 if( list == null ) {
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358 if( map == null )
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359 return Collections.<Map.Entry<Object,Object>>emptyList().iterator();
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360 return map.entrySet().iterator();
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361 }
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362 if( map == null )
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363 return listIterator();
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364 return new Iterator<Map.Entry<Object,Object>>() {
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365 Iterator<Map.Entry<Object,Object>> iter = listIterator();
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366 boolean isList = true;
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367
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368 public boolean hasNext() {
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369 boolean b = iter.hasNext();
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370 if( !b && isList ) {
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371 iter = map.entrySet().iterator();
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372 isList = false;
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373 b = iter.hasNext();
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374 }
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375 return b;
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376 }
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377
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378 public Map.Entry<Object,Object> next() {
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379 return iter.next();
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380 }
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381
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382 public void remove() {
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383 throw new UnsupportedOperationException();
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384 }
57054fa43189 implement table lib
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385 };
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386 }
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387
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388 private Iterator<Map.Entry<Object,Object>> listIterator() {
44
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389 if( list == null )
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390 return Collections.<Map.Entry<Object,Object>>emptyList().iterator();
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391 final ListIterator iter = list.listIterator();
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392 return new Iterator<Map.Entry<Object,Object>>() {
432
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393
44
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394 public boolean hasNext() {
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395 return iter.hasNext();
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396 }
432
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397
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398 public Map.Entry<Object,Object> next() {
432
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399 Integer key = iter.nextIndex()+1;
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400 return new AbstractMap.SimpleEntry<Object,Object>(key,iter.next());
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401 }
432
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402
44
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403 public void remove() {
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404 throw new UnsupportedOperationException();
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405 }
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406 };
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407 }
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408
431
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409 public LuanTable rawSubList(int from,int to) {
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410 LuanTable tbl = new LuanTable(cloner);
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411 tbl.list = new ArrayList<Object>(list().subList(from-1,to-1));
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412 return tbl;
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413 }
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414
408
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415 public LuanTable getMetatable() {
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416 return metatable;
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417 }
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418
408
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419 public void setMetatable(LuanTable metatable) {
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420 this.metatable = metatable;
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421 }
300
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422
419
8fbb961aabd5 improve repr() to check metamethod recursively
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423 public Object getHandler(String op) {
432
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424 return metatable==null ? null : metatable.rawGet(op);
419
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425 }
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426
431
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427 private Map<Object,Object> newMap() {
406
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428 return new LinkedHashMap<Object,Object>();
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429 }
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430
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431 public boolean isSet(LuanState luan) throws LuanException {
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432 for( Map.Entry<Object,Object> entry : iterable(luan) ) {
406
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433 if( !entry.getValue().equals(Boolean.TRUE) )
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434 return false;
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435 }
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436 return true;
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437 }
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438
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439 public Set<Object> asSet(LuanState luan) throws LuanException {
406
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440 Set<Object> set = new HashSet<Object>();
575
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441 for( Map.Entry<Object,Object> entry : iterable(luan) ) {
406
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442 set.add(entry.getKey());
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443 }
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444 return set;
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445 }
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446
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447 public Map<Object,Object> asMap(LuanState luan) throws LuanException {
406
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448 Map<Object,Object> map = newMap();
575
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449 for( Map.Entry<Object,Object> entry : iterable(luan) ) {
406
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450 map.put(entry.getKey(),entry.getValue());
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451 }
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452 return map;
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453 }
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454
497
55f9f74f1e55 Http.request is now pure luan
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455 public void rawClear() {
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456 map = null;
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457 list = null;
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458 }
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459
1
2df768b926aa start Luan
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460 }