Mercurial Hosting > luan
annotate core/src/luan/LuanState.java @ 195:24ede40ee0aa
make MetatableGetter DeepCloneable, scoped, and secure
git-svn-id: https://luan-java.googlecode.com/svn/trunk@196 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Thu, 03 Jul 2014 08:19:48 +0000 |
parents | cf939124461a |
children | 8960c81eb4bc |
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48
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rename Lua to Luan
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1 package luan; |
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2 |
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3 import java.io.InputStream; |
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4 import java.io.PrintStream; |
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5 import java.util.List; |
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6 import java.util.ArrayList; |
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7 import java.util.Map; |
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8 import java.util.LinkedHashMap; |
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9 import luan.impl.LuanCompiler; |
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10 import luan.modules.BasicLuan; |
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11 import luan.modules.PackageLuan; |
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12 |
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13 |
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14 public abstract class LuanState implements DeepCloneable<LuanState> { |
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15 private final LuanBit JAVA = bit(LuanElement.JAVA); |
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16 |
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17 public LuanException exception(Object msg) { |
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18 return JAVA.exception(msg); |
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19 } |
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20 |
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21 public Object call(LuanFunction fn) throws LuanException { |
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22 return call(fn,null,LuanFunction.NOTHING); |
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23 } |
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24 |
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25 public Object call(LuanFunction fn,String fnName) throws LuanException { |
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26 return call(fn,fnName,LuanFunction.NOTHING); |
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27 } |
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28 |
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29 public Object call(LuanFunction fn,Object[] args) throws LuanException { |
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30 return call(fn,null,args); |
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31 } |
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32 |
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33 public Object call(LuanFunction fn,String fnName,Object[] args) throws LuanException { |
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34 return JAVA.call(fn,fnName,args); |
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35 } |
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36 |
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37 public LuanFunction checkFunction(Object obj) throws LuanException { |
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38 return JAVA.checkFunction(obj); |
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39 } |
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40 |
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41 public String toString(Object obj) throws LuanException { |
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42 return JAVA.toString(obj); |
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43 } |
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44 |
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45 public String repr(Object obj) throws LuanException { |
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46 return JAVA.repr(obj); |
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47 } |
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48 |
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49 public boolean isLessThan(Object o1,Object o2) throws LuanException { |
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50 return JAVA.isLessThan(o1,o2); |
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51 } |
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52 |
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53 |
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54 |
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55 private LuanTable global; |
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56 private LuanTable loaded; |
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57 private LuanTable preload; |
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58 private LuanTable searchers; |
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59 |
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60 final List<StackTraceElement> stackTrace = new ArrayList<StackTraceElement>(); |
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61 |
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62 protected LuanState() { |
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63 global = new LuanTable(); |
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64 global.put("_G",global); |
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65 loaded = new LuanTable(); |
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66 preload = new LuanTable(); |
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67 searchers = new LuanTable(); |
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68 } |
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69 |
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70 @Override public void deepenClone(LuanState clone,DeepCloner cloner) { |
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71 clone.global = cloner.deepClone(global); |
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72 clone.loaded = cloner.deepClone(loaded); |
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73 clone.preload = cloner.deepClone(preload); |
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74 clone.searchers = cloner.deepClone(searchers); |
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75 } |
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76 |
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77 public abstract LuanTable currentEnvironment(); |
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78 |
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79 public final LuanTable global() { |
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80 return global; |
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81 } |
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82 |
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83 public final LuanTable loaded() { |
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84 return loaded; |
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85 } |
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86 |
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87 public final LuanTable preload() { |
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88 return preload; |
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89 } |
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90 |
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91 public final LuanTable searchers() { |
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92 return searchers; |
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93 } |
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94 |
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95 public final Object get(String name) { |
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96 String[] a = name.split("\\."); |
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97 LuanTable t = loaded; |
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98 for( int i=0; i<a.length-1; i++ ) { |
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99 Object obj = t.get(a[i]); |
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100 if( !(obj instanceof LuanTable) ) |
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101 return null; |
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102 t = (LuanTable)obj; |
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103 } |
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104 return t.get(a[a.length-1]); |
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105 } |
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106 |
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107 public final Object set(String name,Object value) { |
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108 String[] a = name.split("\\."); |
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109 LuanTable t = loaded; |
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110 for( int i=0; i<a.length-1; i++ ) { |
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111 Object obj = t.get(a[i]); |
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112 if( !(obj instanceof LuanTable) ) |
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113 return null; |
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114 t = (LuanTable)obj; |
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115 } |
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116 return t.put(a[a.length-1],value); |
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117 } |
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118 |
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119 public static LuanState newStandard() { |
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120 try { |
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121 LuanState luan = LuanCompiler.newLuanState(); |
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122 BasicLuan.do_file(luan,"java:luan/init.luan"); |
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123 return luan; |
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124 } catch(LuanException e) { |
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125 throw new RuntimeException(e); |
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126 } |
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127 } |
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128 |
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129 public final Object eval(String cmd) { |
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130 return eval(cmd,new LuanTable()); |
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131 } |
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132 |
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133 public final Object eval(String cmd,LuanTable env) { |
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134 try { |
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135 LuanFunction fn = BasicLuan.load(this,cmd,"eval",env,true); |
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136 return call(fn); |
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137 } catch(LuanException e) { |
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138 throw new RuntimeException(e); |
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139 } |
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140 } |
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141 |
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142 public final LuanTable getMetatable(Object obj) { |
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143 return getMetatable(obj,null); |
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144 } |
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145 |
195
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146 public abstract LuanTable getMetatable(Object obj,MetatableGetter beforeThis); |
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147 |
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148 public abstract void addMetatableGetter(MetatableGetter mg); |
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149 |
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150 public final LuanBit bit(LuanElement el) { |
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151 return new LuanBit(this,el); |
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152 } |
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153 |
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154 public final Object getHandler(String op,Object obj) { |
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155 LuanTable t = getMetatable(obj); |
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156 return t==null ? null : t.get(op); |
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157 } |
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158 |
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159 } |