Mercurial Hosting > luan
annotate core/src/luan/LuanTable.java @ 430:f28320fd671d
fix LuanTable.toString() to use metatables
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Sat, 02 May 2015 20:35:26 -0600 |
parents | df95199ca4c0 |
children | 3ffe8ba5b297 |
rev | line source |
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1
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1 package luan; |
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2 |
27
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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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16 |
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17 |
423 | 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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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 String toString(LuanState luan) throws LuanException { |
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94 Object h = getHandler("__to_string"); |
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95 if( h == null ) |
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96 return rawToString(); |
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97 if( h instanceof LuanMeta ) { |
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98 LuanMeta meta = (LuanMeta)h; |
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99 return meta.__to_string(luan,this); |
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100 } |
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101 LuanFunction fn = luan.checkFunction(h); |
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102 return luan.checkString( Luan.first( luan.call(fn,"__to_string",new Object[]{this}) ) ); |
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103 } |
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104 |
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105 public String rawToString() { |
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106 return "table: " + Integer.toHexString(hashCode()); |
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107 } |
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108 |
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109 public Object get(LuanState luan,Object key) throws LuanException { |
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110 Object value = rawGet(key); |
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111 if( value != null ) |
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112 return value; |
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113 Object h = getHandler("__index"); |
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114 if( h==null ) |
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115 return null; |
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116 if( h instanceof LuanFunction ) { |
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117 LuanFunction fn = (LuanFunction)h; |
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118 return Luan.first(luan.call(fn,"__index",new Object[]{this,key})); |
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119 } |
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120 if( h instanceof LuanMeta ) { |
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121 LuanMeta meta = (LuanMeta)h; |
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122 return meta.__index(luan,this,key); |
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123 } |
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124 if( h instanceof LuanTable ) { |
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125 LuanTable tbl = (LuanTable)h; |
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126 return tbl.get(luan,key); |
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127 } |
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128 throw luan.exception("invalid type "+Luan.type(h)+" for metamethod __index"); |
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129 } |
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130 |
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131 public Object rawGet(Object key) { |
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132 if( list != null ) { |
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133 Integer iT = Luan.asInteger(key); |
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134 if( iT != null ) { |
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135 int i = iT - 1; |
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136 if( i>=0 && i<list.size() ) |
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137 return list.get(i); |
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138 } |
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139 } |
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140 if( map==null ) |
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141 return null; |
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142 return map.get(key); |
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143 } |
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144 |
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145 public void put(LuanState luan,Object key,Object value) throws LuanException { |
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146 Object h = getHandler("__new_index"); |
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147 if( h==null || rawGet(key)!=null ) { |
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148 rawPut(key,value); |
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149 return; |
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150 } |
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151 if( h instanceof LuanFunction ) { |
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152 LuanFunction fn = (LuanFunction)h; |
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153 luan.call(fn,"__new_index",new Object[]{this,key,value}); |
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154 return; |
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155 } |
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156 if( h instanceof LuanMeta ) { |
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157 LuanMeta meta = (LuanMeta)h; |
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158 meta.__new_index(luan,this,key,value); |
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159 return; |
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160 } |
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161 if( h instanceof LuanTable ) { |
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162 LuanTable tbl = (LuanTable)h; |
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163 tbl.put(luan,key,value); |
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164 return; |
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165 } |
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166 throw luan.exception("invalid type "+Luan.type(h)+" for metamethod __new_index"); |
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167 } |
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168 |
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169 public void rawPut(Object key,Object val) { |
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170 Integer iT = Luan.asInteger(key); |
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171 if( iT != null ) { |
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172 int i = iT - 1; |
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173 if( list != null || i == 0 ) { |
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174 if( i == list().size() ) { |
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175 if( val != null ) { |
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176 list.add(val); |
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177 mapToList(); |
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178 } |
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179 return; |
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180 } else if( i>=0 && i<list.size() ) { |
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181 list.set(i,val); |
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182 if( val == null ) { |
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183 listToMap(i); |
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184 } |
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185 return; |
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186 } |
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187 } |
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188 } |
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189 if( map==null ) { |
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190 map = newMap(); |
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191 } |
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192 if( key instanceof Number && !(key instanceof Double) ) { |
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193 Number n = (Number)key; |
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194 key = Double.valueOf(n.doubleValue()); |
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195 } |
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196 if( val == null ) { |
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197 map.remove(key); |
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198 } else { |
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199 map.put(key,val); |
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200 } |
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201 } |
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202 |
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203 private void mapToList() { |
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204 if( map != null ) { |
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205 while(true) { |
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206 Object v = map.remove(Double.valueOf(list.size()+1)); |
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207 if( v == null ) |
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208 break; |
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209 list.add(v); |
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210 } |
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211 } |
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212 } |
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213 |
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214 private void listToMap(int from) { |
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215 if( list != null ) { |
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216 while( list.size() > from ) { |
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217 int i = list.size() - 1; |
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218 Object v = list.remove(i); |
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219 if( v != null ) { |
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220 if( map==null ) |
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221 map = newMap(); |
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222 map.put(i+1,v); |
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223 } |
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224 } |
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225 } |
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226 } |
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227 |
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228 private List<Object> list() { |
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229 if( list == null ) { |
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230 list = new ArrayList<Object>(); |
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231 mapToList(); |
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232 } |
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233 return list; |
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234 } |
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235 |
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236 public void insert(int pos,Object value) { |
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237 if( value==null ) |
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238 throw new IllegalArgumentException("can't insert a nil value"); |
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239 list().add(pos-1,value); |
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240 mapToList(); |
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241 } |
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242 |
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243 public void add(Object value) { |
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244 if( value==null ) |
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245 throw new IllegalArgumentException("can't add a nil value"); |
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246 list().add(value); |
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247 mapToList(); |
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248 } |
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249 |
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250 public Object remove(int pos) { |
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251 return list().remove(pos-1); |
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252 } |
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253 |
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254 public void sort(Comparator<Object> cmp) { |
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255 Collections.sort(list(),cmp); |
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256 } |
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257 |
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258 public int length() { |
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259 return list==null ? 0 : list.size(); |
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260 } |
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261 |
221
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262 @Override public Iterator<Map.Entry<Object,Object>> iterator() { |
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263 if( list == null ) { |
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264 if( map == null ) |
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265 return Collections.<Map.Entry<Object,Object>>emptyList().iterator(); |
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266 return map.entrySet().iterator(); |
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267 } |
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268 if( map == null ) |
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269 return listIterator(); |
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270 return new Iterator<Map.Entry<Object,Object>>() { |
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271 Iterator<Map.Entry<Object,Object>> iter = listIterator(); |
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272 boolean isList = true; |
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273 public boolean hasNext() { |
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274 boolean b = iter.hasNext(); |
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275 if( !b && isList ) { |
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276 iter = map.entrySet().iterator(); |
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277 isList = false; |
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278 b = iter.hasNext(); |
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279 } |
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280 return b; |
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281 } |
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282 public Map.Entry<Object,Object> next() { |
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283 return iter.next(); |
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284 } |
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285 public void remove() { |
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286 throw new UnsupportedOperationException(); |
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287 } |
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288 }; |
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289 } |
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290 |
221
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291 private Iterator<Map.Entry<Object,Object>> listIterator() { |
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292 if( list == null ) |
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293 return Collections.<Map.Entry<Object,Object>>emptyList().iterator(); |
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294 final ListIterator iter = list.listIterator(); |
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295 return new Iterator<Map.Entry<Object,Object>>() { |
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296 public boolean hasNext() { |
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297 return iter.hasNext(); |
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298 } |
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299 public Map.Entry<Object,Object> next() { |
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300 Double key = Double.valueOf(iter.nextIndex()+1); |
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301 return new AbstractMap.SimpleEntry<Object,Object>(key,iter.next()); |
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302 } |
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303 public void remove() { |
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304 throw new UnsupportedOperationException(); |
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305 } |
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306 }; |
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307 } |
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308 |
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309 public LuanTable subList(int from,int to) { |
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310 LuanTable tbl = shallowClone(); |
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311 tbl.list = new ArrayList<Object>(list().subList(from-1,to-1)); |
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312 return tbl; |
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313 } |
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314 |
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315 public LuanTable getMetatable() { |
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316 return metatable; |
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317 } |
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318 |
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319 public void setMetatable(LuanTable metatable) { |
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320 this.metatable = metatable; |
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321 } |
300
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322 |
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323 public Object getHandler(String op) { |
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324 LuanTable t = getMetatable(); |
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325 return t==null ? null : t.rawGet(op); |
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326 } |
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327 |
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328 public boolean hasJava() { |
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329 return hasJava; |
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330 } |
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331 |
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332 public void setJava() { |
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333 hasJava = true; |
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334 } |
406
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335 |
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336 |
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337 // from AbstractLuanTable |
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338 |
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339 protected final Map<Object,Object> newMap() { |
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340 return new LinkedHashMap<Object,Object>(); |
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341 } |
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342 |
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343 public boolean isEmpty() { |
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344 return isList() && length()==0; |
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345 } |
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346 |
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347 public boolean isSet() { |
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348 for( Map.Entry<Object,Object> entry : this ) { |
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349 if( !entry.getValue().equals(Boolean.TRUE) ) |
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350 return false; |
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351 } |
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352 return true; |
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353 } |
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354 |
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355 public Set<Object> asSet() { |
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356 Set<Object> set = new HashSet<Object>(); |
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357 for( Map.Entry<Object,Object> entry : this ) { |
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358 set.add(entry.getKey()); |
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359 } |
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360 return set; |
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361 } |
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362 |
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363 public Map<Object,Object> asMap() { |
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364 Map<Object,Object> map = newMap(); |
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365 for( Map.Entry<Object,Object> entry : this ) { |
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366 map.put(entry.getKey(),entry.getValue()); |
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367 } |
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368 return map; |
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369 } |
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370 |
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371 } |