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annotate src/luan/LuanTable.java @ 1607:fa066aaa068c
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author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Fri, 30 Apr 2021 20:23:28 -0600 |
parents | c922446f53aa |
children | 92beba8bf1c8 |
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; |
1
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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; |
1
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14 |
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15 |
1578 | 16 public final class LuanTable implements LuanMutable { |
434 | 17 private Map map = null; |
18 private List list = null; | |
48
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19 private LuanTable metatable = null; |
1330 | 20 public LuanClosure closure; |
1561 | 21 private boolean immutable = false; |
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22 |
1562 | 23 public LuanTable() {} |
364 | 24 |
1562 | 25 public LuanTable(List list) { |
26 try { | |
27 list(); | |
28 int n = list.size(); | |
29 for( int i=0; i<n; i++ ) { | |
30 Object val = list.get(i); | |
31 if( val != null ) | |
32 rawPut(i+1,val); | |
33 } | |
34 } catch(LuanException e) { | |
35 throw new RuntimeException(e); | |
432
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36 } |
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37 } |
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38 |
1562 | 39 public LuanTable(Map map) { |
40 try { | |
41 for( Object stupid : map.entrySet() ) { | |
42 Map.Entry entry = (Map.Entry)stupid; | |
43 Object key = entry.getKey(); | |
44 Object value = entry.getValue(); | |
45 if( key != null && value != null ) | |
46 rawPut(key,value); | |
47 } | |
48 } catch(LuanException e) { | |
49 throw new RuntimeException(e); | |
432
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50 } |
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51 } |
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52 |
1562 | 53 public LuanTable(Set set) { |
54 try { | |
55 for( Object el : set ) { | |
56 if( el != null ) | |
57 rawPut(el,Boolean.TRUE); | |
58 } | |
59 } catch(LuanException e) { | |
60 throw new RuntimeException(e); | |
118
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61 } |
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62 } |
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63 |
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64 public LuanTable(LuanTable tbl) { |
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65 if( tbl.map != null && !tbl.map.isEmpty() ) |
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66 this.map = new LinkedHashMap<Object,Object>(tbl.map); |
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67 if( tbl.rawLength() > 0 ) |
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68 this.list = new ArrayList<Object>(tbl.list); |
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69 this.metatable = tbl.metatable; |
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70 } |
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71 |
1578 | 72 @Override public boolean isImmutable() { |
73 return immutable; | |
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74 } |
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75 |
1578 | 76 @Override public void makeImmutable() { |
77 if(immutable) | |
78 return; | |
79 immutable = true; | |
80 LuanMutable.makeImmutable(map); | |
81 LuanMutable.makeImmutable(list); | |
82 LuanMutable.makeImmutable(metatable); | |
83 LuanMutable.makeImmutable(closure); | |
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84 } |
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85 |
1578 | 86 private void checkMutable() throws LuanException { |
87 if( immutable ) | |
88 throw new LuanException("table is immutable"); | |
1561 | 89 } |
90 | |
408
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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 |
1495 | 95 public boolean isMap() { |
1464 | 96 return map!=null || list==null; |
97 } | |
98 | |
408
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99 public List<Object> asList() { |
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100 return list!=null ? list : Collections.emptyList(); |
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101 } |
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102 |
1189 | 103 public Map rawMap() { |
104 return map!=null ? map : Collections.emptyMap(); | |
105 } | |
106 | |
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107 public String toStringLuan(Luan luan) throws LuanException { |
1607 | 108 LuanFunction fn = luan.getHandlerFunction("__to_string",this); |
109 if( fn == null ) | |
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110 return rawToString(); |
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111 return Luan.checkString( Luan.first( fn.call(luan,this) ) ); |
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112 } |
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113 |
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114 public String rawToString() { |
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115 return "table: " + Integer.toHexString(hashCode()); |
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116 } |
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117 |
1562 | 118 public Object get(Luan luan,Object key) throws LuanException { |
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119 //checkLuan(luan); |
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120 Object value = rawGet(key); |
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121 if( value != null ) |
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122 return value; |
1578 | 123 Object h = getHandler(luan,"__index"); |
426
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124 if( h==null ) |
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125 return null; |
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126 if( h instanceof LuanFunction ) { |
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127 LuanFunction fn = (LuanFunction)h; |
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128 return Luan.first(fn.call(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 |
1562 | 151 public void put(Luan luan,Object key,Object value) throws LuanException { |
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152 //checkLuan(luan); |
1578 | 153 Object h = getHandler(luan,"__new_index"); |
427
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154 if( h==null || rawGet(key)!=null ) { |
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155 rawPut(key,value); |
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156 return; |
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157 } |
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158 if( h instanceof LuanFunction ) { |
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159 LuanFunction fn = (LuanFunction)h; |
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160 fn.call(luan,this,key,value); |
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161 return; |
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162 } |
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163 if( h instanceof LuanTable ) { |
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164 LuanTable tbl = (LuanTable)h; |
1562 | 165 tbl.put(luan,key,value); |
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166 return; |
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167 } |
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168 throw new LuanException("invalid type "+Luan.type(h)+" for metamethod __new_index"); |
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169 } |
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170 |
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171 public Object rawPut(Object key,Object val) throws LuanException { |
1578 | 172 checkMutable(); |
1566 | 173 if( key==null ) |
174 throw new LuanException("table index is nil"); | |
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175 Integer iT = Luan.asInteger(key); |
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176 if( iT != null ) { |
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177 int i = iT - 1; |
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178 if( list != null || i == 0 ) { |
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179 if( i == list().size() ) { |
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180 if( val != null ) { |
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181 list.add(val); |
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182 mapToList(); |
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183 } |
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184 return null; |
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185 } else if( i>=0 && i<list.size() ) { |
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186 Object rtn = list.set(i,val); |
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187 if( val == null ) { |
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188 listToMap(i); |
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189 } |
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190 return rtn; |
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191 } |
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192 } |
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193 } |
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194 if( key instanceof Number && !(key instanceof Double) ) { |
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195 Number n = (Number)key; |
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196 key = Double.valueOf(n.doubleValue()); |
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197 } |
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198 if( val == null ) { |
1420 | 199 if( map!=null ) |
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200 return map.remove(key); |
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201 else |
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202 return null; |
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203 } else { |
1420 | 204 if( map==null ) |
205 map = newMap(); | |
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206 return map.put(key,val); |
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207 } |
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208 } |
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209 |
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210 private void mapToList() { |
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211 if( map != null ) { |
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212 while(true) { |
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213 Object v = map.remove(Double.valueOf(list.size()+1)); |
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214 if( v == null ) |
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215 break; |
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216 list.add(v); |
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217 } |
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218 } |
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219 } |
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220 |
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221 private void listToMap(int from) { |
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222 if( list != null ) { |
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223 while( list.size() > from ) { |
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224 int i = list.size() - 1; |
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225 Object v = list.remove(i); |
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226 if( v != null ) { |
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227 if( map==null ) |
284
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228 map = newMap(); |
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229 map.put(i+1,v); |
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230 } |
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231 } |
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232 } |
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233 } |
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234 |
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235 private List<Object> list() { |
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236 if( list == null ) { |
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237 list = new ArrayList<Object>(); |
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238 mapToList(); |
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239 } |
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240 return list; |
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241 } |
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242 |
1578 | 243 public void rawInsert(int pos,Object value) throws LuanException { |
244 checkMutable(); | |
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245 if( value==null ) |
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246 throw new IllegalArgumentException("can't insert a nil value"); |
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247 list().add(pos-1,value); |
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248 mapToList(); |
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249 } |
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250 |
1578 | 251 public void rawAdd(Object value) throws LuanException { |
252 checkMutable(); | |
1447 | 253 if( value==null ) |
254 throw new IllegalArgumentException("can't insert a nil value"); | |
255 list().add(value); | |
256 mapToList(); | |
257 } | |
258 | |
1578 | 259 public Object removeFromList(int pos) throws LuanException { |
260 checkMutable(); | |
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261 return list().remove(pos-1); |
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262 } |
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263 |
1578 | 264 public void rawSort(Comparator<Object> cmp) throws LuanException { |
265 checkMutable(); | |
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266 Collections.sort(list(),cmp); |
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267 } |
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268 |
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269 public int length(Luan luan) throws LuanException { |
1607 | 270 LuanFunction fn = luan.getHandlerFunction("__len",this); |
271 if( fn != null ) { | |
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272 return (Integer)Luan.first(fn.call(luan,this)); |
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273 } |
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274 return rawLength(); |
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275 } |
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276 |
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277 public int rawLength() { |
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278 return list==null ? 0 : list.size(); |
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279 } |
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280 |
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281 public Iterable<Map.Entry> iterable(Luan luan) throws LuanException { |
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282 final Iterator<Map.Entry> iter = iterator(luan); |
1113 | 283 return new Iterable<Map.Entry>() { |
284 public Iterator<Map.Entry> iterator() { | |
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285 return iter; |
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286 } |
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287 }; |
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288 } |
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289 |
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290 public Iterable<Map.Entry> rawIterable() { |
1113 | 291 final Iterator<Map.Entry> iter = rawIterator(); |
292 return new Iterable<Map.Entry>() { | |
293 public Iterator<Map.Entry> iterator() { | |
498
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294 return iter; |
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295 } |
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296 }; |
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297 } |
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298 |
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299 public Iterator<Map.Entry> iterator(final Luan luan) throws LuanException { |
1607 | 300 LuanFunction h = luan.getHandlerFunction("__pairs",this); |
301 if( h == null ) | |
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302 return rawIterator(); |
1607 | 303 final LuanFunction fn = pairs(luan,h); |
1113 | 304 return new Iterator<Map.Entry>() { |
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305 private Map.Entry<Object,Object> next = getNext(); |
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306 |
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307 private Map.Entry<Object,Object> getNext() { |
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308 try { |
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309 Object obj = fn.call(luan); |
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310 if( obj==null ) |
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311 return null; |
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312 Object[] a = (Object[])obj; |
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313 if( a.length == 0 || a[0]==null ) |
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314 return null; |
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315 return new AbstractMap.SimpleEntry<Object,Object>(a[0],a[1]); |
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316 } catch(LuanException e) { |
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317 throw new LuanRuntimeException(e); |
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318 } |
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319 } |
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320 |
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321 public boolean hasNext() { |
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322 return next != null; |
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323 } |
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324 |
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325 public Map.Entry<Object,Object> next() { |
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326 Map.Entry<Object,Object> rtn = next; |
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327 next = getNext(); |
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328 return rtn; |
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329 } |
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330 |
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331 public void remove() { |
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332 throw new UnsupportedOperationException(); |
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333 } |
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334 }; |
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335 } |
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336 |
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337 public LuanFunction pairs(Luan luan) throws LuanException { |
1607 | 338 return pairs( luan, luan.getHandlerFunction("__pairs",this) ); |
339 } | |
340 | |
341 private LuanFunction pairs(Luan luan,LuanFunction fn) throws LuanException { | |
342 if( fn==null ) | |
343 return rawPairs(); | |
344 Object obj = Luan.first(fn.call(luan,this)); | |
345 if( !(obj instanceof LuanFunction) ) | |
346 throw new LuanException( "metamethod __pairs should return function but returned " + Luan.type(obj) ); | |
347 return (LuanFunction)obj; | |
432
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348 } |
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349 |
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350 private LuanFunction rawPairs() { |
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351 return new LuanFunction() { |
1113 | 352 final Iterator<Map.Entry> iter = rawIterator(); |
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353 |
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354 @Override public Object[] call(Luan luan,Object[] args) { |
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355 if( !iter.hasNext() ) |
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356 return LuanFunction.NOTHING; |
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357 Map.Entry<Object,Object> entry = iter.next(); |
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358 return new Object[]{entry.getKey(),entry.getValue()}; |
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359 } |
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360 }; |
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361 } |
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362 |
1113 | 363 public Iterator<Map.Entry> rawIterator() { |
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364 if( list == null ) { |
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365 if( map == null ) |
1113 | 366 return Collections.<Map.Entry>emptyList().iterator(); |
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367 return map.entrySet().iterator(); |
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368 } |
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369 if( map == null ) |
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370 return listIterator(); |
1113 | 371 return new Iterator<Map.Entry>() { |
372 Iterator<Map.Entry> iter = listIterator(); | |
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373 boolean isList = true; |
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374 |
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375 public boolean hasNext() { |
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376 boolean b = iter.hasNext(); |
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377 if( !b && isList ) { |
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378 iter = map.entrySet().iterator(); |
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379 isList = false; |
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380 b = iter.hasNext(); |
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381 } |
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382 return b; |
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383 } |
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384 |
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385 public Map.Entry<Object,Object> next() { |
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386 return iter.next(); |
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387 } |
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388 |
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389 public void remove() { |
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390 throw new UnsupportedOperationException(); |
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391 } |
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392 }; |
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393 } |
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394 |
1113 | 395 private Iterator<Map.Entry> listIterator() { |
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396 if( list == null ) |
1113 | 397 return Collections.<Map.Entry>emptyList().iterator(); |
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398 final ListIterator iter = list.listIterator(); |
1113 | 399 return new Iterator<Map.Entry>() { |
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400 |
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401 public boolean hasNext() { |
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402 return iter.hasNext(); |
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403 } |
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404 |
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405 public Map.Entry<Object,Object> next() { |
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406 Integer key = iter.nextIndex()+1; |
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407 return new AbstractMap.SimpleEntry<Object,Object>(key,iter.next()); |
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408 } |
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409 |
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410 public void remove() { |
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411 throw new UnsupportedOperationException(); |
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412 } |
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413 }; |
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414 } |
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415 |
431 | 416 public LuanTable rawSubList(int from,int to) { |
1562 | 417 LuanTable tbl = new LuanTable(); |
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418 tbl.list = new ArrayList<Object>(list().subList(from-1,to-1)); |
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419 return tbl; |
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420 } |
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421 |
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422 public LuanTable getMetatable() { |
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423 return metatable; |
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424 } |
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425 |
1330 | 426 public void setMetatable(LuanTable metatable) throws LuanException { |
1578 | 427 checkMutable(); |
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428 this.metatable = metatable; |
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429 } |
300
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430 |
1578 | 431 public Object getHandler(Luan luan,String op) throws LuanException { |
432 return metatable==null ? null : luan==null ? metatable.rawGet(op) : metatable.get(luan,op); | |
419
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433 } |
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434 |
1561 | 435 private static Map<Object,Object> newMap() { |
406
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436 return new LinkedHashMap<Object,Object>(); |
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437 } |
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438 |
1267 | 439 public boolean isSet() throws LuanException { |
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440 for( Map.Entry<Object,Object> entry : rawIterable() ) { |
406
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441 if( !entry.getValue().equals(Boolean.TRUE) ) |
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442 return false; |
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443 } |
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444 return true; |
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445 } |
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446 |
1267 | 447 public Set<Object> asSet() throws LuanException { |
406
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448 Set<Object> set = new HashSet<Object>(); |
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449 for( Map.Entry<Object,Object> entry : rawIterable() ) { |
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450 set.add(entry.getKey()); |
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451 } |
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452 return set; |
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453 } |
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454 |
1267 | 455 public Map<Object,Object> asMap() throws LuanException { |
406
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456 Map<Object,Object> map = newMap(); |
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457 for( Map.Entry<Object,Object> entry : rawIterable() ) { |
406
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458 map.put(entry.getKey(),entry.getValue()); |
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459 } |
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460 return map; |
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461 } |
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462 |
1578 | 463 public void rawClear() throws LuanException { |
464 checkMutable(); | |
497
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465 map = null; |
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466 list = null; |
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467 } |
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468 |
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469 public int hashValue() { |
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470 int n = 99; |
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471 if( map != null ) |
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472 n ^= map.hashCode(); |
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473 if( list != null ) |
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474 n ^= list.hashCode(); |
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475 return n; |
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476 } |
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477 |
1420 | 478 public boolean isEmpty() { |
1100
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479 return (map==null || map.isEmpty()) && (list==null || list.isEmpty()); |
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480 } |
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481 |
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482 public int rawSize() { |
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483 int n = 0; |
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484 if( map != null ) |
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485 n += map.size(); |
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486 if( list != null ) |
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487 n += list.size(); |
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488 return n; |
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489 } |
1267 | 490 |
1561 | 491 public Object remove(Object key) throws LuanException { |
1578 | 492 checkMutable(); |
1420 | 493 Object old = rawGet(key); |
1562 | 494 rawPut(key,null); |
1420 | 495 return old; |
496 } | |
497 | |
1267 | 498 protected void finalize() throws Throwable { |
1578 | 499 Object h = getHandler(null,"__gc"); |
1267 | 500 if( h != null ) { |
501 LuanFunction fn = Luan.checkFunction(h); | |
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502 fn.call(new Luan(),this); // ??? should be immutable |
1267 | 503 } |
504 super.finalize(); | |
505 } | |
506 | |
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507 public LuanFunction fn(String fnName) throws LuanException { |
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508 return (LuanFunction)rawGet(fnName); |
1330 | 509 } |
1464 | 510 |
511 public static void debug(LuanTable table) { | |
512 System.out.println("isMap "+table.isMap()); | |
513 } | |
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514 } |