Mercurial Hosting > luan
annotate core/src/luan/modules/JavaLuan.java @ 576:4723d22062ce
remove LuanBit
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Mon, 13 Jul 2015 20:38:26 -0600 |
parents | 7c3ad6db8ac3 |
children | 60c549d43988 |
rev | line source |
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167
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merge luan/lib into modules
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1 package luan.modules; |
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2 |
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3 import java.lang.reflect.Array; |
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4 import java.lang.reflect.AccessibleObject; |
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5 import java.lang.reflect.Member; |
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6 import java.lang.reflect.Field; |
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7 import java.lang.reflect.Method; |
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8 import java.lang.reflect.Constructor; |
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9 import java.lang.reflect.Modifier; |
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10 import java.lang.reflect.InvocationHandler; |
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11 import java.lang.reflect.Proxy; |
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12 import java.util.Map; |
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13 import java.util.HashMap; |
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14 import java.util.List; |
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15 import java.util.ArrayList; |
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16 import java.util.Iterator; |
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17 import java.util.Collections; |
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18 import java.util.Arrays; |
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19 import luan.Luan; |
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20 import luan.LuanState; |
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21 import luan.LuanTable; |
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22 import luan.LuanException; |
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23 import luan.LuanFunction; |
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24 import luan.LuanJavaFunction; |
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25 import luan.LuanElement; |
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26 |
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27 |
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28 public final class JavaLuan { |
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29 |
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30 public static void java(LuanState luan) throws LuanException { |
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31 check(luan,luan.currentSource().name); |
503 | 32 luan.setJava(); |
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33 } |
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34 |
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35 public static final LuanFunction javaFn; |
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36 static { |
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37 try { |
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38 javaFn = new LuanJavaFunction(JavaLuan.class.getMethod("java",LuanState.class),null); |
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39 } catch(NoSuchMethodException e) { |
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40 throw new RuntimeException(e); |
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41 } |
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42 } |
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43 |
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44 private static void checkJava(LuanState luan) throws LuanException { |
503 | 45 if( !luan.hasJava() ) |
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46 throw luan.exception("Java isn't allowed"); |
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47 } |
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48 |
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49 static final Object FAIL = new Object(); |
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50 |
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51 public static Object __index(LuanState luan,Object obj,Object key,boolean canReturnFail) throws LuanException { |
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52 checkJava(luan); |
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53 Class cls; |
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54 if( obj instanceof Static ) { |
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55 Static st = (Static)obj; |
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56 cls = st.cls; |
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57 if( key instanceof String ) { |
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58 String name = (String)key; |
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59 if( "class".equals(name) ) { |
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60 return cls; |
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61 } else if( "new".equals(name) ) { |
437 | 62 Constructor[] constructors = cls.getConstructors(); |
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63 if( constructors.length > 0 ) { |
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64 if( constructors.length==1 ) { |
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65 return new LuanJavaFunction(constructors[0],null); |
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66 } else { |
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67 List<LuanJavaFunction> fns = new ArrayList<LuanJavaFunction>(); |
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68 for( Constructor constructor : constructors ) { |
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69 fns.add(new LuanJavaFunction(constructor,null)); |
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70 } |
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71 return new AmbiguousJavaFunction(fns); |
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72 } |
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73 } |
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74 /* |
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75 } else if( "assert".equals(name) ) { |
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76 return new LuanJavaFunction(assertClass,new AssertClass(cls)); |
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77 */ |
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78 } else if( "luan_proxy".equals(name) ) { |
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79 return new LuanJavaFunction(luan_proxyMethod,st); |
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80 } else { |
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81 List<Member> members = getStaticMembers(cls,name); |
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82 if( !members.isEmpty() ) { |
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83 return member(null,members); |
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84 } |
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85 } |
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86 } |
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87 } else { |
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88 cls = obj.getClass(); |
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89 if( cls.isArray() ) { |
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90 if( "length".equals(key) ) { |
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91 return Array.getLength(obj); |
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92 } |
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93 Integer i = Luan.asInteger(key); |
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94 if( i != null ) { |
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95 return Array.get(obj,i); |
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96 } |
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97 // throw luan.exception("invalid member '"+key+"' for java array: "+obj); |
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98 } else if( key instanceof String ) { |
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99 String name = (String)key; |
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100 if( "instanceof".equals(name) ) { |
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101 return new LuanJavaFunction(instanceOf,new InstanceOf(obj)); |
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102 } else { |
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103 List<Member> members = getMembers(cls,name); |
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104 if( !members.isEmpty() ) { |
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105 return member(obj,members); |
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106 } |
208
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107 } |
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108 } |
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109 } |
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110 //System.out.println("invalid member '"+key+"' for java object: "+obj); |
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111 if( canReturnFail ) |
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112 return FAIL; |
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113 throw luan.exception( "invalid index for java "+cls+" in '"+luan.context()+"'" ); |
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114 } |
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115 |
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116 private static Object member(Object obj,List<Member> members) throws LuanException { |
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117 try { |
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118 if( members.size()==1 ) { |
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119 Member member = members.get(0); |
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120 if( member instanceof Static ) { |
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121 return member; |
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122 } else if( member instanceof Field ) { |
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123 Field field = (Field)member; |
157
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124 Object rtn = field.get(obj); |
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125 return rtn instanceof Object[] ? Arrays.asList((Object[])rtn) : rtn; |
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126 } else { |
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127 Method method = (Method)member; |
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128 return new LuanJavaFunction(method,obj); |
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129 } |
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130 } else { |
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131 List<LuanJavaFunction> fns = new ArrayList<LuanJavaFunction>(); |
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132 for( Member member : members ) { |
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133 Method method = (Method)member; |
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134 fns.add(new LuanJavaFunction(method,obj)); |
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135 } |
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136 return new AmbiguousJavaFunction(fns); |
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137 } |
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138 } catch(IllegalAccessException e) { |
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139 throw new RuntimeException(e); |
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140 } |
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141 } |
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142 |
576 | 143 public static void __new_index(LuanState luan,Object obj,Object key,Object value) throws LuanException { |
421
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144 checkJava(luan); |
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145 Class cls; |
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146 if( obj instanceof Static ) { |
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147 Static st = (Static)obj; |
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148 cls = st.cls; |
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149 if( key instanceof String ) { |
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150 String name = (String)key; |
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151 List<Member> members = getStaticMembers(cls,name); |
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152 if( !members.isEmpty() ) { |
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153 if( members.size() != 1 ) |
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154 throw new RuntimeException("not field '"+name+"' of "+obj); |
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155 setMember(obj,members,value); |
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156 return; |
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157 } |
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158 } |
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159 // throw luan.exception("invalid member '"+key+"' for: "+obj); |
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160 } else { |
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161 cls = obj.getClass(); |
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162 if( cls.isArray() ) { |
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163 Integer i = Luan.asInteger(key); |
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164 if( i != null ) { |
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165 Array.set(obj,i,value); |
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166 return; |
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167 } |
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168 // throw luan.exception("invalid member '"+key+"' for java array: "+obj); |
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169 } else if( key instanceof String ) { |
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170 String name = (String)key; |
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171 List<Member> members = getMembers(cls,name); |
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172 if( !members.isEmpty() ) { |
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173 if( members.size() != 1 ) |
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174 throw new RuntimeException("not field '"+name+"' of "+obj); |
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175 setMember(obj,members,value); |
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176 return; |
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177 } |
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178 } |
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179 } |
576 | 180 throw luan.exception( "invalid index for java "+cls+" in '"+luan.context()+"'" ); |
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181 } |
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182 |
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183 private static void setMember(Object obj,List<Member> members,Object value) { |
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184 Field field = (Field)members.get(0); |
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185 try { |
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186 try { |
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187 field.set(obj,value); |
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188 } catch(IllegalArgumentException e) { |
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189 Class cls = field.getType(); |
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190 if( value instanceof Number ) { |
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191 Number n = (Number)value; |
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192 if( cls.equals(Integer.TYPE) || cls.equals(Integer.class) ) { |
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193 int r = n.intValue(); |
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194 if( r==n.doubleValue() ) { |
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195 field.setInt(obj,r); |
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196 return; |
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197 } |
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198 } |
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199 } |
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200 throw e; |
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201 } |
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202 } catch(IllegalAccessException e) { |
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203 throw new RuntimeException(e); |
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204 } |
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205 } |
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206 |
102
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207 public static boolean privateAccess = false; |
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208 private static Map<Class,Map<String,List<Member>>> memberMap = new HashMap<Class,Map<String,List<Member>>>(); |
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209 |
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210 private static synchronized List<Member> getMembers(Class cls,String name) { |
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211 Map<String,List<Member>> clsMap = memberMap.get(cls); |
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212 if( clsMap == null ) { |
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213 clsMap = new HashMap<String,List<Member>>(); |
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214 for( Class c : cls.getClasses() ) { |
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215 String s = c.getSimpleName(); |
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216 List<Member> list = new ArrayList<Member>(); |
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217 clsMap.put(s,list); |
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218 list.add(new Static(c)); |
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219 } |
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220 for( Field field : cls.getFields() ) { |
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221 String s = field.getName(); |
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222 try { |
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223 if( !cls.getField(s).equals(field) ) |
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224 continue; // not accessible |
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225 } catch(NoSuchFieldException e) { |
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226 throw new RuntimeException(e); |
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227 } |
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228 List<Member> list = new ArrayList<Member>(); |
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229 clsMap.put(s,list); |
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230 list.add(field); |
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231 } |
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232 for( Method method : cls.getMethods() ) { |
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233 String s = method.getName(); |
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234 List<Member> list = clsMap.get(s); |
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235 if( list == null || !(list.get(0) instanceof Method) ) { |
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236 list = new ArrayList<Member>(); |
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237 clsMap.put(s,list); |
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238 } |
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239 list.add(method); |
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240 } |
102
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241 if( privateAccess ) { |
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242 for( Method method : cls.getDeclaredMethods() ) { |
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243 String s = method.getName(); |
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244 List<Member> list = clsMap.get(s); |
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245 if( list == null ) { |
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246 list = new ArrayList<Member>(); |
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247 clsMap.put(s,list); |
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248 } else if( !(list.get(0) instanceof Method) ) |
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249 continue; |
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250 if( !list.contains(method) ) { |
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251 list.add(method); |
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252 } |
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253 } |
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254 for( Field field : cls.getDeclaredFields() ) { |
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255 String s = field.getName(); |
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256 List<Member> list = clsMap.get(s); |
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257 if( list == null ) { |
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258 list = new ArrayList<Member>(); |
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259 clsMap.put(s,list); |
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260 list.add(field); |
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261 } |
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262 } |
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263 } |
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264 for( List<Member> members : clsMap.values() ) { |
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265 for( Member m : members ) { |
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266 if( m instanceof AccessibleObject ) |
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267 ((AccessibleObject)m).setAccessible(true); |
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268 } |
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269 } |
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270 memberMap.put(cls,clsMap); |
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271 } |
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272 List<Member> rtn = clsMap.get(name); |
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273 if( rtn==null ) |
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274 rtn = Collections.emptyList(); |
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275 return rtn; |
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276 } |
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277 |
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278 private static synchronized List<Member> getStaticMembers(Class cls,String name) { |
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279 List<Member> staticMembers = new ArrayList<Member>(); |
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280 for( Member m : getMembers(cls,name) ) { |
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281 if( Modifier.isStatic(m.getModifiers()) ) |
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282 staticMembers.add(m); |
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283 } |
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284 return staticMembers; |
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285 } |
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286 |
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287 static final class Static implements Member { |
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288 final Class cls; |
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289 |
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290 Static(Class cls) { |
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291 this.cls = cls; |
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292 } |
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293 |
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294 @Override public String toString() { |
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295 return cls.toString(); |
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296 } |
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297 |
437 | 298 @Override public Class getDeclaringClass() { |
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299 return cls.getDeclaringClass(); |
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300 } |
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301 |
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302 @Override public String getName() { |
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303 return cls.getName(); |
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304 } |
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305 |
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306 @Override public int getModifiers() { |
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307 return cls.getModifiers(); |
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308 } |
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309 |
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310 @Override public boolean isSynthetic() { |
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311 return cls.isSynthetic(); |
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312 } |
304
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313 |
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314 public Object luan_proxy(final LuanState luan,final LuanTable t) throws LuanException { |
304
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315 return Proxy.newProxyInstance( |
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316 cls.getClassLoader(), |
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317 new Class[]{cls}, |
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318 new InvocationHandler() { |
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319 public Object invoke(Object proxy,Method method, Object[] args) |
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320 throws Throwable |
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321 { |
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322 if( args==null ) |
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323 args = new Object[0]; |
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324 String name = method.getName(); |
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325 Object fnObj = t.get(luan,name); |
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326 if( fnObj == null ) |
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327 throw new NullPointerException("luan_proxy couldn't find method '"+name+"'"); |
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328 LuanFunction fn = luan.checkFunction(fnObj); |
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329 return Luan.first(fn.call(luan,args)); |
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330 } |
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331 } |
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332 ); |
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333 } |
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334 } |
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335 private static final Method luan_proxyMethod; |
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336 static { |
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337 try { |
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338 luan_proxyMethod = Static.class.getMethod("luan_proxy",LuanState.class,LuanTable.class); |
304
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339 luan_proxyMethod.setAccessible(true); |
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340 } catch(NoSuchMethodException e) { |
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341 throw new RuntimeException(e); |
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342 } |
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343 } |
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344 |
299
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345 public static Static load(LuanState luan,String name) throws LuanException { |
300
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346 checkJava(luan); |
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347 Class cls; |
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348 try { |
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349 cls = Class.forName(name); |
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350 } catch(ClassNotFoundException e) { |
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351 try { |
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352 cls = Thread.currentThread().getContextClassLoader().loadClass(name); |
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353 } catch(ClassNotFoundException e2) { |
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354 return null; |
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355 } |
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356 } |
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357 return new Static(cls); |
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358 } |
300
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359 |
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360 private static class AmbiguousJavaFunction extends LuanFunction { |
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361 private final Map<Integer,List<LuanJavaFunction>> fnMap = new HashMap<Integer,List<LuanJavaFunction>>(); |
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362 |
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363 AmbiguousJavaFunction(List<LuanJavaFunction> fns) { |
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364 for( LuanJavaFunction fn : fns ) { |
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365 Integer n = fn.getParameterTypes().length; |
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366 List<LuanJavaFunction> list = fnMap.get(n); |
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367 if( list==null ) { |
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368 list = new ArrayList<LuanJavaFunction>(); |
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369 fnMap.put(n,list); |
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370 } |
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371 list.add(fn); |
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372 } |
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373 } |
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374 |
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375 @Override public Object call(LuanState luan,Object[] args) throws LuanException { |
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376 for( LuanJavaFunction fn : fnMap.get(args.length) ) { |
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377 try { |
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378 return fn.rawCall(luan,args); |
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379 } catch(IllegalArgumentException e) {} |
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380 } |
402 | 381 throw luan.exception("no method matched args: "+Arrays.asList(args)); |
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382 } |
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383 } |
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384 |
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385 private static class InstanceOf { |
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386 private final Object obj; |
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387 |
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388 InstanceOf(Object obj) { |
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389 this.obj = obj; |
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390 } |
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391 |
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392 public boolean instanceOf(Static st) { |
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393 return st.cls.isInstance(obj); |
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394 } |
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395 } |
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396 private static final Method instanceOf; |
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397 static { |
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398 try { |
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399 instanceOf = InstanceOf.class.getMethod("instanceOf",Static.class); |
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400 instanceOf.setAccessible(true); |
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401 } catch(NoSuchMethodException e) { |
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402 throw new RuntimeException(e); |
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403 } |
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404 } |
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405 |
304
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406 /* |
64
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407 private static class AssertClass { |
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408 private final Class cls; |
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409 |
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410 AssertClass(Class cls) { |
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411 this.cls = cls; |
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412 } |
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413 |
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414 public Object assertClass(LuanState luan,Object v) throws LuanException { |
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415 if( !cls.isInstance(v) ) { |
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416 String got = v.getClass().getSimpleName(); |
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417 String expected = cls.getSimpleName(); |
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418 throw luan.exception("bad argument #1 ("+expected+" expected, got "+got+")"); |
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419 } |
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420 return v; |
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421 } |
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422 } |
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423 private static final Method assertClass; |
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424 static { |
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425 try { |
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426 assertClass = AssertClass.class.getMethod("assertClass",LuanState.class,Object.class); |
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427 assertClass.setAccessible(true); |
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428 } catch(NoSuchMethodException e) { |
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429 throw new RuntimeException(e); |
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430 } |
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431 } |
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432 |
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433 |
62
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434 public static Object proxy(final LuanState luan,Static st,final LuanTable t,final Object base) throws LuanException { |
61
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435 return Proxy.newProxyInstance( |
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436 st.cls.getClassLoader(), |
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437 new Class[]{st.cls}, |
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438 new InvocationHandler() { |
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439 public Object invoke(Object proxy,Method method, Object[] args) |
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440 throws Throwable |
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441 { |
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442 if( args==null ) |
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443 args = new Object[0]; |
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444 String name = method.getName(); |
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445 Object fnObj = t.get(name); |
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446 if( fnObj==null && base!=null ) |
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447 return method.invoke(base,args); |
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448 LuanFunction fn = luan.checkFunction(fnObj); |
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449 return Luan.first(luan.call(fn,name,args)); |
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450 } |
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451 } |
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452 ); |
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453 } |
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454 */ |
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455 |
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456 |
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457 |
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458 // security |
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459 |
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460 public interface Security { |
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461 public void check(LuanState luan,String name) throws LuanException; |
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462 } |
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463 |
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464 private static String SECURITY_KEY = "Java.Security"; |
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465 |
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466 private static void check(LuanState luan,String name) throws LuanException { |
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467 Security s = (Security)luan.registry().get(SECURITY_KEY); |
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468 if( s!=null ) |
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469 s.check(luan,name); |
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470 } |
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471 |
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472 public static void setSecurity(LuanState luan,Security s) { |
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473 luan.registry().put(SECURITY_KEY,s); |
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474 } |
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475 |
37
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476 } |