Mercurial Hosting > luan
annotate core/src/luan/LuanState.java @ 300:9fb523472035
add java() to control java access
git-svn-id: https://luan-java.googlecode.com/svn/trunk@301 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Tue, 16 Dec 2014 13:13:33 +0000 |
parents | a74559240b4f |
children | a6bf8ff720f8 |
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48
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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 java.util.Set; |
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10 import java.util.HashSet; |
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11 import luan.impl.LuanCompiler; |
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12 import luan.modules.BasicLuan; |
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13 import luan.modules.PackageLuan; |
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14 import luan.modules.JavaLuan; |
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15 import luan.modules.StringLuan; |
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16 |
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17 |
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18 public abstract class LuanState implements DeepCloneable<LuanState> { |
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19 |
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20 final List<StackTraceElement> stackTrace = new ArrayList<StackTraceElement>(); |
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21 |
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22 private LuanTableImpl registry; |
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23 private LuanTableImpl global; |
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24 private LuanTableImpl metatable; // generic metatable |
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25 |
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26 protected LuanState() { |
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27 registry = new LuanTableImpl(); |
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28 global = new LuanTableImpl(); |
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29 global.put("_G",global); |
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30 global.put("java",JavaLuan.javaFn); |
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31 metatable = newMetatable(); |
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32 } |
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33 |
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34 protected LuanState(LuanState luan) {} |
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35 |
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36 @Override public void deepenClone(LuanState clone,DeepCloner cloner) { |
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37 clone.registry = cloner.deepClone(registry); |
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38 clone.global = cloner.deepClone(global); |
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39 clone.metatable = cloner.deepClone(metatable); |
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40 } |
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41 |
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42 public abstract LuanTable currentEnvironment(); |
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43 |
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44 public final LuanTable registry() { |
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45 return registry; |
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46 } |
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47 |
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48 public final LuanTable global() { |
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49 return global; |
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50 } |
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51 |
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52 public static LuanState newStandard() { |
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53 try { |
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54 LuanState luan = LuanCompiler.newLuanState(); |
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55 PackageLuan.require(luan,"luan:Basic"); |
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56 PackageLuan.require(luan,"luan:Io"); |
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57 // BasicLuan.do_file(luan,"classpath:luan/init.luan"); |
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58 return luan; |
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59 } catch(LuanException e) { |
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60 throw new RuntimeException(e); |
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61 } |
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62 } |
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63 |
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64 public final Object eval(String cmd) { |
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65 return eval(cmd,new LuanTableImpl()); |
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66 } |
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67 |
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68 public final Object eval(String cmd,LuanTable env) { |
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69 try { |
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70 LuanFunction fn = BasicLuan.load(this,cmd,"eval",env,true); |
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71 return call(fn); |
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72 } catch(LuanException e) { |
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73 throw new RuntimeException(e); |
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74 } |
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75 } |
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76 |
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77 public final LuanTable getMetatable(Object obj) { |
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78 if( obj==null ) |
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79 return null; |
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80 if( obj instanceof LuanTable ) { |
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81 LuanTable table = (LuanTable)obj; |
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82 return table.getMetatable(); |
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83 } |
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84 return metatable; |
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85 } |
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86 |
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87 public final LuanBit bit(LuanElement el) { |
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88 return new LuanBit(this,el); |
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89 } |
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90 |
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91 public final Object getHandler(String op,Object obj) { |
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92 LuanTable t = getMetatable(obj); |
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93 return t==null ? null : t.get(op); |
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94 } |
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95 |
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96 public final Object getHandler(String op,LuanTable table) { |
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97 LuanTable t = table.getMetatable(); |
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98 return t==null ? null : t.get(op); |
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99 } |
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100 |
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101 private static LuanTableImpl newMetatable() { |
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102 LuanTableImpl metatable = new LuanTableImpl(); |
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103 try { |
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104 metatable.put( "__index", new LuanJavaFunction( |
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105 LuanState.class.getMethod("__index",LuanState.class,Object.class,Object.class), null |
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106 ) ); |
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107 metatable.put( "__newindex", new LuanJavaFunction( |
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108 LuanState.class.getMethod("__newindex",LuanState.class,Object.class,Object.class,Object.class), null |
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109 ) ); |
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110 } catch(NoSuchMethodException e) { |
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111 throw new RuntimeException(e); |
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112 } |
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113 return metatable; |
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114 } |
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115 |
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116 public static Object __index(LuanState luan,Object obj,Object key) throws LuanException { |
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117 if( obj instanceof String ) { |
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118 Object rtn = StringLuan.__index(luan,(String)obj,key); |
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119 if( rtn != null ) |
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120 return rtn; |
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121 } |
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122 return JavaLuan.__index(luan,obj,key); |
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123 } |
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124 |
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125 public static void __newindex(LuanState luan,Object obj,Object key,Object value) throws LuanException { |
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126 JavaLuan.__newindex(luan,obj,key,value); |
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127 } |
199
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128 |
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129 // convenience methods |
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130 |
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131 private final LuanBit JAVA = bit(LuanElement.JAVA); |
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132 |
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133 public LuanException exception(Object msg) { |
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134 return JAVA.exception(msg); |
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135 } |
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136 |
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137 public Object call(LuanFunction fn) throws LuanException { |
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138 return call(fn,null,LuanFunction.NOTHING); |
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139 } |
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140 |
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141 public Object call(LuanFunction fn,String fnName) throws LuanException { |
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142 return call(fn,fnName,LuanFunction.NOTHING); |
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143 } |
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144 |
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145 public Object call(LuanFunction fn,Object[] args) throws LuanException { |
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146 return call(fn,null,args); |
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147 } |
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148 |
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149 public Object call(LuanFunction fn,String fnName,Object[] args) throws LuanException { |
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150 return JAVA.call(fn,fnName,args); |
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151 } |
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152 |
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153 public LuanFunction checkFunction(Object obj) throws LuanException { |
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154 return JAVA.checkFunction(obj); |
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155 } |
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156 |
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157 public String toString(Object obj) throws LuanException { |
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158 return JAVA.toString(obj); |
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159 } |
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160 |
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161 public String repr(Object obj) throws LuanException { |
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162 return JAVA.repr(obj); |
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163 } |
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164 |
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165 public boolean isLessThan(Object o1,Object o2) throws LuanException { |
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166 return JAVA.isLessThan(o1,o2); |
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167 } |
48
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168 } |