Mercurial Hosting > luan
annotate src/luan/modules/JavaLuan.java @ 1165:668f29bc52ea
clean up content-type
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Wed, 07 Feb 2018 23:16:12 -0700 |
parents | e54ae41e9501 |
children | 9fa8b8389578 |
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; |
37
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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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various fixes
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17 import java.util.Collections; |
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18 import java.util.Arrays; |
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19 import java.util.Comparator; |
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20 import luan.Luan; |
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21 import luan.LuanState; |
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22 import luan.LuanTable; |
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23 import luan.LuanException; |
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24 import luan.LuanFunction; |
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25 import luan.LuanJavaFunction; |
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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 { |
1134 | 31 check(luan); |
1133 | 32 luan.javaOk.ok = true; |
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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 { |
1133 | 45 if( !luan.javaOk.ok ) |
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46 throw new LuanException("Java isn't allowed"); |
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47 } |
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48 |
795 | 49 public static Object __index(LuanState luan,Object obj,Object key) throws LuanException { |
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50 checkJava(luan); |
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51 Class cls; |
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52 if( obj instanceof Static ) { |
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53 Static st = (Static)obj; |
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54 cls = st.cls; |
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55 if( key instanceof String ) { |
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56 String name = (String)key; |
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57 if( "class".equals(name) ) { |
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58 return cls; |
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59 } else if( "new".equals(name) ) { |
437 | 60 Constructor[] constructors = cls.getConstructors(); |
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61 if( constructors.length > 0 ) { |
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62 if( constructors.length==1 ) { |
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63 return new LuanJavaFunction(constructors[0],null); |
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64 } else { |
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65 List<LuanJavaFunction> fns = new ArrayList<LuanJavaFunction>(); |
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66 for( Constructor constructor : constructors ) { |
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67 fns.add(new LuanJavaFunction(constructor,null)); |
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68 } |
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69 return new AmbiguousJavaFunction(fns); |
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70 } |
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71 } |
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72 /* |
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73 } else if( "assert".equals(name) ) { |
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74 return new LuanJavaFunction(assertClass,new AssertClass(cls)); |
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75 */ |
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76 } else if( "luan_proxy".equals(name) ) { |
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77 return new LuanJavaFunction(luan_proxyMethod,st); |
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78 } else { |
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79 List<Member> members = getStaticMembers(cls,name); |
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80 if( !members.isEmpty() ) { |
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81 return member(null,members); |
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82 } |
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83 } |
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84 } |
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85 } else { |
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86 cls = obj.getClass(); |
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87 if( cls.isArray() ) { |
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88 if( "length".equals(key) ) { |
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89 return Array.getLength(obj); |
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90 } |
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91 Integer i = Luan.asInteger(key); |
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92 if( i != null ) { |
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93 return Array.get(obj,i); |
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94 } |
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95 // throw new LuanException(luan,"invalid member '"+key+"' for java array: "+obj); |
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96 } else if( key instanceof String ) { |
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97 String name = (String)key; |
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98 if( "instanceof".equals(name) ) { |
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99 return new LuanJavaFunction(instanceOf,new InstanceOf(obj)); |
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100 } else { |
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101 List<Member> members = getMembers(cls,name); |
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102 if( !members.isEmpty() ) { |
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103 return member(obj,members); |
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104 } |
208
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105 } |
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106 } |
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107 } |
297
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108 //System.out.println("invalid member '"+key+"' for java object: "+obj); |
687 | 109 throw new LuanException( "invalid index '"+key+"' for java "+cls ); |
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110 } |
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111 |
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112 private static Object member(Object obj,List<Member> members) throws LuanException { |
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113 try { |
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114 if( members.size()==1 ) { |
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115 Member member = members.get(0); |
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116 if( member instanceof Static ) { |
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117 return member; |
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118 } else if( member instanceof Field ) { |
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119 Field field = (Field)member; |
157
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120 Object rtn = field.get(obj); |
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121 return rtn instanceof Object[] ? Arrays.asList((Object[])rtn) : rtn; |
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122 } else { |
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123 Method method = (Method)member; |
297
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124 return new LuanJavaFunction(method,obj); |
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125 } |
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126 } else { |
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127 List<LuanJavaFunction> fns = new ArrayList<LuanJavaFunction>(); |
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128 for( Member member : members ) { |
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129 Method method = (Method)member; |
297
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130 fns.add(new LuanJavaFunction(method,obj)); |
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131 } |
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132 return new AmbiguousJavaFunction(fns); |
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133 } |
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134 } catch(IllegalAccessException e) { |
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135 throw new RuntimeException(e); |
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136 } |
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137 } |
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138 |
576 | 139 public static void __new_index(LuanState luan,Object obj,Object key,Object value) throws LuanException { |
421
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140 checkJava(luan); |
511
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141 Class cls; |
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142 if( obj instanceof Static ) { |
511
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143 Static st = (Static)obj; |
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144 cls = st.cls; |
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145 if( key instanceof String ) { |
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146 String name = (String)key; |
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147 List<Member> members = getStaticMembers(cls,name); |
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148 if( !members.isEmpty() ) { |
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149 if( members.size() != 1 ) |
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150 throw new RuntimeException("not field '"+name+"' of "+obj); |
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151 setMember(obj,members,value); |
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152 return; |
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153 } |
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154 } |
578
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155 // throw new LuanException(luan,"invalid member '"+key+"' for: "+obj); |
511
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156 } else { |
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157 cls = obj.getClass(); |
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158 if( cls.isArray() ) { |
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159 Integer i = Luan.asInteger(key); |
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160 if( i != null ) { |
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161 Array.set(obj,i,value); |
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162 return; |
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163 } |
578
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164 // throw new LuanException(luan,"invalid member '"+key+"' for java array: "+obj); |
511
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165 } else if( key instanceof String ) { |
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166 String name = (String)key; |
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167 List<Member> members = getMembers(cls,name); |
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168 if( !members.isEmpty() ) { |
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169 if( members.size() != 1 ) |
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170 throw new RuntimeException("not field '"+name+"' of "+obj); |
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171 setMember(obj,members,value); |
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172 return; |
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173 } |
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174 } |
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175 } |
646
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176 throw new LuanException( "invalid index for java "+cls ); |
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177 } |
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178 |
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179 private static void setMember(Object obj,List<Member> members,Object value) { |
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180 Field field = (Field)members.get(0); |
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181 try { |
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182 try { |
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183 field.set(obj,value); |
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184 } catch(IllegalArgumentException e) { |
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185 Class cls = field.getType(); |
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186 if( value instanceof Number ) { |
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187 Number n = (Number)value; |
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188 if( cls.equals(Integer.TYPE) || cls.equals(Integer.class) ) { |
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189 int r = n.intValue(); |
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190 if( r==n.doubleValue() ) { |
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191 field.setInt(obj,r); |
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192 return; |
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193 } |
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194 } |
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195 } |
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196 throw e; |
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197 } |
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198 } catch(IllegalAccessException e) { |
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199 throw new RuntimeException(e); |
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200 } |
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201 } |
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202 |
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203 public static boolean privateAccess = false; |
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204 private static Map<Class,Map<String,List<Member>>> memberMap = new HashMap<Class,Map<String,List<Member>>>(); |
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205 |
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206 private static List<Member> getMembers(Class cls,String name) { |
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207 Map<String,List<Member>> clsMap; |
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208 synchronized(memberMap) { |
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209 clsMap = memberMap.get(cls); |
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210 if( clsMap == null ) { |
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211 clsMap = new HashMap<String,List<Member>>(); |
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212 for( Class c : cls.getClasses() ) { |
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213 String s = c.getSimpleName(); |
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214 List<Member> list = new ArrayList<Member>(); |
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215 clsMap.put(s,list); |
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216 list.add(new Static(c)); |
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217 } |
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218 for( Field field : cls.getFields() ) { |
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219 String s = field.getName(); |
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220 try { |
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221 if( !cls.getField(s).equals(field) ) |
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222 continue; // not accessible |
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223 } catch(NoSuchFieldException e) { |
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224 throw new RuntimeException(e); |
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225 } |
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226 List<Member> list = new ArrayList<Member>(); |
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227 clsMap.put(s,list); |
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228 list.add(field); |
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229 } |
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230 for( Method method : cls.getMethods() ) { |
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231 String s = method.getName(); |
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232 List<Member> list = clsMap.get(s); |
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233 if( list == null || !(list.get(0) instanceof Method) ) { |
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234 list = new ArrayList<Member>(); |
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235 clsMap.put(s,list); |
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236 } |
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237 list.add(method); |
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238 } |
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239 if( privateAccess ) { |
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240 for( Method method : cls.getDeclaredMethods() ) { |
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241 String s = method.getName(); |
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242 List<Member> list = clsMap.get(s); |
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243 if( list == null ) { |
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244 list = new ArrayList<Member>(); |
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245 clsMap.put(s,list); |
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246 } else if( !(list.get(0) instanceof Method) ) |
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247 continue; |
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248 if( !list.contains(method) ) { |
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249 list.add(method); |
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250 } |
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251 } |
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252 for( Field field : cls.getDeclaredFields() ) { |
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253 String s = field.getName(); |
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254 List<Member> list = clsMap.get(s); |
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255 if( list == null ) { |
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256 list = new ArrayList<Member>(); |
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257 clsMap.put(s,list); |
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258 list.add(field); |
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259 } |
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260 } |
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261 } |
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262 for( List<Member> members : clsMap.values() ) { |
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263 for( Member m : members ) { |
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264 if( m instanceof AccessibleObject ) |
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265 ((AccessibleObject)m).setAccessible(true); |
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266 } |
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267 } |
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268 memberMap.put(cls,clsMap); |
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269 } |
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270 } |
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271 List<Member> rtn = clsMap.get(name); |
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272 if( rtn==null ) |
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273 rtn = Collections.emptyList(); |
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274 return rtn; |
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275 } |
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276 |
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277 private static List<Member> getStaticMembers(Class cls,String name) { |
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278 List<Member> staticMembers = new ArrayList<Member>(); |
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279 for( Member m : getMembers(cls,name) ) { |
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280 if( Modifier.isStatic(m.getModifiers()) ) |
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281 staticMembers.add(m); |
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282 } |
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283 return staticMembers; |
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284 } |
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285 |
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286 static final class Static implements Member { |
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287 final Class cls; |
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288 |
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289 Static(Class cls) { |
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290 this.cls = cls; |
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291 } |
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292 |
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293 @Override public String toString() { |
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294 return cls.toString(); |
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295 } |
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296 |
437 | 297 @Override public Class getDeclaringClass() { |
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298 return cls.getDeclaringClass(); |
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299 } |
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300 |
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301 @Override public String getName() { |
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302 return cls.getName(); |
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303 } |
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304 |
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305 @Override public int getModifiers() { |
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306 return cls.getModifiers(); |
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307 } |
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308 |
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309 @Override public boolean isSynthetic() { |
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310 return cls.isSynthetic(); |
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311 } |
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312 |
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313 public Object luan_proxy(final LuanState luan,final LuanTable t) throws LuanException { |
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314 return Proxy.newProxyInstance( |
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315 cls.getClassLoader(), |
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316 new Class[]{cls}, |
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317 new InvocationHandler() { |
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318 public Object invoke(Object proxy,Method method, Object[] args) |
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319 throws Throwable |
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320 { |
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321 if( args==null ) |
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322 args = new Object[0]; |
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323 String name = method.getName(); |
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324 Object fnObj = t.get(luan,name); |
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325 if( fnObj == null ) |
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326 throw new NullPointerException("luan_proxy couldn't find method '"+name+"'"); |
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327 LuanFunction fn = Luan.checkFunction(fnObj); |
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328 return Luan.first(fn.call(luan,args)); |
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329 } |
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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 private static final Method luan_proxyMethod; |
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335 static { |
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336 try { |
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337 luan_proxyMethod = Static.class.getMethod("luan_proxy",LuanState.class,LuanTable.class); |
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338 luan_proxyMethod.setAccessible(true); |
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339 } catch(NoSuchMethodException e) { |
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340 throw new RuntimeException(e); |
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341 } |
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342 } |
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343 |
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344 public static Static load(LuanState luan,String name) throws LuanException { |
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345 checkJava(luan); |
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346 Class cls; |
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347 try { |
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348 cls = Class.forName(name); |
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349 } catch(ClassNotFoundException e) { |
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350 try { |
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351 cls = Thread.currentThread().getContextClassLoader().loadClass(name); |
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352 } catch(ClassNotFoundException e2) { |
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353 return null; |
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354 } |
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355 } |
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356 return new Static(cls); |
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357 } |
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358 |
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359 private static final Comparator<LuanJavaFunction> varArgsSorter = new Comparator<LuanJavaFunction>() { |
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360 public int compare(LuanJavaFunction fn1,LuanJavaFunction fn2) { |
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361 return fn2.getParameterCount() - fn1.getParameterCount(); |
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362 } |
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363 }; |
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364 |
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365 private static class AmbiguousJavaFunction extends LuanFunction { |
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366 private final Map<Integer,List<LuanJavaFunction>> fnMap = new HashMap<Integer,List<LuanJavaFunction>>(); |
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367 private List<LuanJavaFunction> varArgs = new ArrayList<LuanJavaFunction>(); |
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368 |
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369 AmbiguousJavaFunction(List<LuanJavaFunction> fns) { |
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370 for( LuanJavaFunction fn : fns ) { |
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371 if( fn.isVarArgs() ) { |
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372 varArgs.add(fn); |
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373 } else { |
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374 Integer n = fn.getParameterCount(); |
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375 List<LuanJavaFunction> list = fnMap.get(n); |
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376 if( list==null ) { |
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377 list = new ArrayList<LuanJavaFunction>(); |
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378 fnMap.put(n,list); |
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379 } |
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380 list.add(fn); |
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381 } |
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382 } |
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383 Collections.sort(varArgs,varArgsSorter); |
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384 } |
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385 |
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386 @Override public Object call(LuanState luan,Object[] args) throws LuanException { |
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387 List<LuanJavaFunction> list = fnMap.get(args.length); |
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388 if( list != null ) { |
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389 for( LuanJavaFunction fn : list ) { |
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390 try { |
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391 return fn.rawCall(luan,args); |
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392 } catch(IllegalArgumentException e) {} |
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393 } |
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394 } |
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395 for( LuanJavaFunction fn : varArgs ) { |
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396 try { |
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397 return fn.rawCall(luan,args); |
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398 } catch(IllegalArgumentException e) {} |
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399 } |
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400 throw new LuanException("no method matched args: "+Arrays.asList(args)); |
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401 } |
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402 } |
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403 |
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404 private static class InstanceOf { |
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405 private final Object obj; |
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406 |
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407 InstanceOf(Object obj) { |
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408 this.obj = obj; |
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409 } |
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410 |
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411 public boolean instanceOf(Static st) { |
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412 return st.cls.isInstance(obj); |
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413 } |
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414 } |
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415 private static final Method instanceOf; |
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416 static { |
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417 try { |
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418 instanceOf = InstanceOf.class.getMethod("instanceOf",Static.class); |
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419 instanceOf.setAccessible(true); |
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420 } catch(NoSuchMethodException e) { |
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421 throw new RuntimeException(e); |
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422 } |
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423 } |
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424 |
304
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425 /* |
64
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426 private static class AssertClass { |
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427 private final Class cls; |
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428 |
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429 AssertClass(Class cls) { |
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430 this.cls = cls; |
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431 } |
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432 |
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433 public Object assertClass(LuanState luan,Object v) throws LuanException { |
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434 if( !cls.isInstance(v) ) { |
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435 String got = v.getClass().getSimpleName(); |
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436 String expected = cls.getSimpleName(); |
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437 throw new LuanException(luan,"bad argument #1 ("+expected+" expected, got "+got+")"); |
64
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438 } |
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439 return v; |
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440 } |
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441 } |
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442 private static final Method assertClass; |
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443 static { |
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444 try { |
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445 assertClass = AssertClass.class.getMethod("assertClass",LuanState.class,Object.class); |
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446 assertClass.setAccessible(true); |
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447 } catch(NoSuchMethodException e) { |
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448 throw new RuntimeException(e); |
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449 } |
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450 } |
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451 |
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452 |
62
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453 public static Object proxy(final LuanState luan,Static st,final LuanTable t,final Object base) throws LuanException { |
61
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454 return Proxy.newProxyInstance( |
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455 st.cls.getClassLoader(), |
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456 new Class[]{st.cls}, |
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457 new InvocationHandler() { |
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458 public Object invoke(Object proxy,Method method, Object[] args) |
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459 throws Throwable |
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460 { |
63
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461 if( args==null ) |
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462 args = new Object[0]; |
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463 String name = method.getName(); |
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464 Object fnObj = t.get(name); |
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465 if( fnObj==null && base!=null ) |
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466 return method.invoke(base,args); |
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467 LuanFunction fn = luan.checkFunction(fnObj); |
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468 return Luan.first(luan.call(fn,name,args)); |
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469 } |
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470 } |
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471 ); |
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472 } |
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473 */ |
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474 |
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475 |
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476 |
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477 // security |
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478 |
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479 public interface Security { |
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480 public void check(LuanState luan,String name) throws LuanException; |
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481 } |
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482 |
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483 private static String SECURITY_KEY = "Java.Security"; |
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484 |
1134 | 485 static void check(LuanState luan) throws LuanException { |
433
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486 Security s = (Security)luan.registry().get(SECURITY_KEY); |
1134 | 487 if( s!=null ) { |
488 String name = LuanException.currentSource(); | |
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489 s.check(luan,name); |
1134 | 490 } |
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491 } |
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492 |
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493 public static void setSecurity(LuanState luan,Security s) { |
433
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494 luan.registry().put(SECURITY_KEY,s); |
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495 } |
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496 |
37
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497 } |