Mercurial Hosting > luan
annotate src/luan/modules/JavaLuan.java @ 1333:25746915a241
merge Luan and LuanState
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Tue, 12 Feb 2019 22:33:40 -0700 |
parents | f41919741100 |
children | e0cf0d108a77 |
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 java.util.Comparator; |
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20 import luan.Luan; |
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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 |
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26 |
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27 public final class JavaLuan { |
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28 |
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29 public static void java(Luan luan) throws LuanException { |
1330 | 30 Luan.checkSecurity(luan,"java"); |
31 luan.peek().javaOk = true; | |
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32 } |
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33 |
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34 public static final LuanFunction javaFn; |
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35 static { |
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36 try { |
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37 javaFn = new LuanJavaFunction(JavaLuan.class.getMethod("java",Luan.class),null); |
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38 } catch(NoSuchMethodException e) { |
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39 throw new RuntimeException(e); |
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40 } |
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41 } |
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42 |
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43 private static void checkJava(Luan luan) throws LuanException { |
1330 | 44 if( !luan.peek().javaOk ) |
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45 throw new LuanException("Java isn't allowed"); |
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46 } |
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47 |
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48 public static Object __index(Luan luan,Object obj,Object key) throws LuanException { |
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49 checkJava(luan); |
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50 Class cls; |
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51 if( obj instanceof Static ) { |
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52 Static st = (Static)obj; |
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53 cls = st.cls; |
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54 if( key instanceof String ) { |
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55 String name = (String)key; |
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56 if( "class".equals(name) ) { |
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57 return cls; |
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58 } else if( "new".equals(name) ) { |
437 | 59 Constructor[] constructors = cls.getConstructors(); |
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60 if( constructors.length > 0 ) { |
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61 if( constructors.length==1 ) { |
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62 return new LuanJavaFunction(constructors[0],null); |
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63 } else { |
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64 List<LuanJavaFunction> fns = new ArrayList<LuanJavaFunction>(); |
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65 for( Constructor constructor : constructors ) { |
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66 fns.add(new LuanJavaFunction(constructor,null)); |
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67 } |
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68 return new AmbiguousJavaFunction(fns); |
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69 } |
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70 } |
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71 /* |
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72 } else if( "assert".equals(name) ) { |
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73 return new LuanJavaFunction(assertClass,new AssertClass(cls)); |
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74 */ |
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75 } else if( "luan_proxy".equals(name) ) { |
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76 return new LuanJavaFunction(luan_proxyMethod,st); |
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77 } else { |
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78 List<Member> members = getStaticMembers(cls,name); |
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79 if( !members.isEmpty() ) { |
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80 return member(null,members); |
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81 } |
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82 } |
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83 } |
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84 } else { |
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85 cls = obj.getClass(); |
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86 if( cls.isArray() ) { |
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87 if( "length".equals(key) ) { |
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88 return Array.getLength(obj); |
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89 } |
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90 Integer i = Luan.asInteger(key); |
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91 if( i != null ) { |
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92 return Array.get(obj,i); |
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93 } |
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94 // throw new LuanException(luan,"invalid member '"+key+"' for java array: "+obj); |
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95 } else if( key instanceof String ) { |
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96 String name = (String)key; |
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97 if( "instanceof".equals(name) ) { |
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98 return new LuanJavaFunction(instanceOf,new InstanceOf(obj)); |
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99 } else { |
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100 List<Member> members = getMembers(cls,name); |
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101 if( !members.isEmpty() ) { |
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102 return member(obj,members); |
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103 } |
208
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104 } |
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105 } |
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106 } |
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107 //System.out.println("invalid member '"+key+"' for java object: "+obj); |
687 | 108 throw new LuanException( "invalid index '"+key+"' for java "+cls ); |
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109 } |
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110 |
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111 private static Object member(Object obj,List<Member> members) throws LuanException { |
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112 try { |
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113 if( members.size()==1 ) { |
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114 Member member = members.get(0); |
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115 if( member instanceof Static ) { |
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116 return member; |
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117 } else if( member instanceof Field ) { |
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118 Field field = (Field)member; |
157
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119 Object rtn = field.get(obj); |
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120 return rtn instanceof Object[] ? Arrays.asList((Object[])rtn) : rtn; |
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121 } else { |
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122 Method method = (Method)member; |
297
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123 return new LuanJavaFunction(method,obj); |
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124 } |
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125 } else { |
48
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126 List<LuanJavaFunction> fns = new ArrayList<LuanJavaFunction>(); |
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127 for( Member member : members ) { |
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128 Method method = (Method)member; |
297
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129 fns.add(new LuanJavaFunction(method,obj)); |
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130 } |
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131 return new AmbiguousJavaFunction(fns); |
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132 } |
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133 } catch(IllegalAccessException e) { |
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134 throw new RuntimeException(e); |
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135 } |
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136 } |
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137 |
1333
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138 public static void __new_index(Luan luan,Object obj,Object key,Object value) throws LuanException { |
421
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139 checkJava(luan); |
511
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140 Class cls; |
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141 if( obj instanceof Static ) { |
511
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142 Static st = (Static)obj; |
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143 cls = st.cls; |
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144 if( key instanceof String ) { |
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145 String name = (String)key; |
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146 List<Member> members = getStaticMembers(cls,name); |
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147 if( !members.isEmpty() ) { |
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148 if( members.size() != 1 ) |
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149 throw new RuntimeException("not field '"+name+"' of "+obj); |
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150 setMember(obj,members,value); |
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151 return; |
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152 } |
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153 } |
578
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154 // throw new LuanException(luan,"invalid member '"+key+"' for: "+obj); |
511
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155 } else { |
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156 cls = obj.getClass(); |
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157 if( cls.isArray() ) { |
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158 Integer i = Luan.asInteger(key); |
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159 if( i != null ) { |
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160 Array.set(obj,i,value); |
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161 return; |
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162 } |
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163 // throw new LuanException(luan,"invalid member '"+key+"' for java array: "+obj); |
511
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164 } else if( key instanceof String ) { |
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165 String name = (String)key; |
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166 List<Member> members = getMembers(cls,name); |
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167 if( !members.isEmpty() ) { |
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168 if( members.size() != 1 ) |
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169 throw new RuntimeException("not field '"+name+"' of "+obj); |
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170 setMember(obj,members,value); |
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171 return; |
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172 } |
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173 } |
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174 } |
646
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175 throw new LuanException( "invalid index for java "+cls ); |
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176 } |
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177 |
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178 private static void setMember(Object obj,List<Member> members,Object value) { |
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179 Field field = (Field)members.get(0); |
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180 try { |
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181 try { |
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182 field.set(obj,value); |
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183 } catch(IllegalArgumentException e) { |
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184 Class cls = field.getType(); |
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185 if( value instanceof Number ) { |
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186 Number n = (Number)value; |
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187 if( cls.equals(Integer.TYPE) || cls.equals(Integer.class) ) { |
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188 int r = n.intValue(); |
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189 if( r==n.doubleValue() ) { |
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190 field.setInt(obj,r); |
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191 return; |
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192 } |
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193 } |
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194 } |
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195 throw e; |
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196 } |
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197 } catch(IllegalAccessException e) { |
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198 throw new RuntimeException(e); |
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199 } |
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200 } |
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201 |
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202 public static boolean privateAccess = false; |
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203 private static Map<Class,Map<String,List<Member>>> memberMap = new HashMap<Class,Map<String,List<Member>>>(); |
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204 |
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205 private static List<Member> getMembers(Class cls,String name) { |
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206 Map<String,List<Member>> clsMap; |
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207 synchronized(memberMap) { |
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208 clsMap = memberMap.get(cls); |
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209 if( clsMap == null ) { |
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210 clsMap = new HashMap<String,List<Member>>(); |
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211 for( Class c : cls.getClasses() ) { |
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212 String s = c.getSimpleName(); |
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213 List<Member> list = new ArrayList<Member>(); |
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214 clsMap.put(s,list); |
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215 list.add(new Static(c)); |
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216 } |
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217 for( Field field : cls.getFields() ) { |
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218 String s = field.getName(); |
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219 try { |
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220 if( !cls.getField(s).equals(field) ) |
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221 continue; // not accessible |
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222 } catch(NoSuchFieldException e) { |
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223 throw new RuntimeException(e); |
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224 } |
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225 List<Member> list = new ArrayList<Member>(); |
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226 clsMap.put(s,list); |
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227 list.add(field); |
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228 } |
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229 for( Method method : cls.getMethods() ) { |
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230 String s = method.getName(); |
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231 List<Member> list = clsMap.get(s); |
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232 if( list == null || !(list.get(0) instanceof Method) ) { |
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233 list = new ArrayList<Member>(); |
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234 clsMap.put(s,list); |
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235 } |
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236 list.add(method); |
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237 } |
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238 if( privateAccess ) { |
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239 for( Method method : cls.getDeclaredMethods() ) { |
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240 String s = method.getName(); |
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241 List<Member> list = clsMap.get(s); |
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242 if( list == null ) { |
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243 list = new ArrayList<Member>(); |
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244 clsMap.put(s,list); |
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245 } else if( !(list.get(0) instanceof Method) ) |
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246 continue; |
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247 if( !list.contains(method) ) { |
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248 list.add(method); |
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249 } |
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250 } |
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251 for( Field field : cls.getDeclaredFields() ) { |
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252 String s = field.getName(); |
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253 List<Member> list = clsMap.get(s); |
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254 if( list == null ) { |
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255 list = new ArrayList<Member>(); |
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256 clsMap.put(s,list); |
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257 list.add(field); |
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258 } |
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259 } |
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260 } |
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261 for( List<Member> members : clsMap.values() ) { |
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262 for( Member m : members ) { |
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263 if( m instanceof AccessibleObject ) |
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264 ((AccessibleObject)m).setAccessible(true); |
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265 } |
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266 } |
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267 memberMap.put(cls,clsMap); |
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268 } |
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269 } |
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270 List<Member> rtn = clsMap.get(name); |
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271 if( rtn==null ) |
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272 rtn = Collections.emptyList(); |
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273 return rtn; |
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274 } |
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275 |
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276 private static List<Member> getStaticMembers(Class cls,String name) { |
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277 List<Member> staticMembers = new ArrayList<Member>(); |
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278 for( Member m : getMembers(cls,name) ) { |
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279 if( Modifier.isStatic(m.getModifiers()) ) |
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280 staticMembers.add(m); |
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281 } |
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282 return staticMembers; |
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283 } |
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284 |
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285 static final class Static implements Member { |
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286 final Class cls; |
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287 |
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288 Static(Class cls) { |
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289 this.cls = cls; |
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290 } |
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291 |
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292 @Override public String toString() { |
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293 return cls.toString(); |
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294 } |
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295 |
437 | 296 @Override public Class getDeclaringClass() { |
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297 return cls.getDeclaringClass(); |
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298 } |
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299 |
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300 @Override public String getName() { |
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301 return cls.getName(); |
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302 } |
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303 |
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304 @Override public int getModifiers() { |
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305 return cls.getModifiers(); |
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306 } |
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307 |
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308 @Override public boolean isSynthetic() { |
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309 return cls.isSynthetic(); |
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310 } |
304
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311 |
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312 public Object luan_proxy(final Luan luan,final LuanTable t) throws LuanException { |
304
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313 return Proxy.newProxyInstance( |
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314 cls.getClassLoader(), |
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315 new Class[]{cls}, |
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316 new InvocationHandler() { |
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317 public Object invoke(Object proxy,Method method, Object[] args) |
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318 throws Throwable |
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319 { |
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320 if( args==null ) |
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321 args = new Object[0]; |
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322 String name = method.getName(); |
1267 | 323 Object fnObj = t.get(name); |
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324 if( fnObj == null ) |
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325 throw new NullPointerException("luan_proxy couldn't find method '"+name+"'"); |
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326 LuanFunction fn = Luan.checkFunction(fnObj); |
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327 return Luan.first(fn.call(luan,args)); |
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328 } |
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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 private static final Method luan_proxyMethod; |
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334 static { |
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335 try { |
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336 luan_proxyMethod = Static.class.getMethod("luan_proxy",Luan.class,LuanTable.class); |
304
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337 luan_proxyMethod.setAccessible(true); |
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338 } catch(NoSuchMethodException e) { |
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339 throw new RuntimeException(e); |
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340 } |
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341 } |
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342 |
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343 public static Static load(Luan luan,String name) throws LuanException { |
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344 checkJava(luan); |
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345 Class cls; |
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346 try { |
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347 cls = Class.forName(name); |
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348 } catch(ClassNotFoundException e) { |
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349 try { |
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350 cls = Thread.currentThread().getContextClassLoader().loadClass(name); |
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351 } catch(ClassNotFoundException e2) { |
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352 return null; |
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353 } |
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354 } |
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355 return new Static(cls); |
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356 } |
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357 |
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358 private static final Comparator<LuanJavaFunction> varArgsSorter = new Comparator<LuanJavaFunction>() { |
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359 public int compare(LuanJavaFunction fn1,LuanJavaFunction fn2) { |
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360 return fn2.getParameterCount() - fn1.getParameterCount(); |
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361 } |
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362 }; |
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363 |
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364 private static class AmbiguousJavaFunction extends LuanFunction { |
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365 private final Map<Integer,List<LuanJavaFunction>> fnMap = new HashMap<Integer,List<LuanJavaFunction>>(); |
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366 private List<LuanJavaFunction> varArgs = new ArrayList<LuanJavaFunction>(); |
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367 |
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368 AmbiguousJavaFunction(List<LuanJavaFunction> fns) { |
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369 for( LuanJavaFunction fn : fns ) { |
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370 if( fn.isVarArgs() ) { |
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371 varArgs.add(fn); |
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372 } else { |
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373 Integer n = fn.getParameterCount(); |
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374 List<LuanJavaFunction> list = fnMap.get(n); |
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375 if( list==null ) { |
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376 list = new ArrayList<LuanJavaFunction>(); |
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377 fnMap.put(n,list); |
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378 } |
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379 list.add(fn); |
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380 } |
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381 } |
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382 Collections.sort(varArgs,varArgsSorter); |
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383 } |
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384 |
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385 @Override public Object call(Luan luan,Object[] args) throws LuanException { |
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386 List<LuanJavaFunction> list = fnMap.get(args.length); |
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387 if( list != null ) { |
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388 for( LuanJavaFunction fn : list ) { |
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389 try { |
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390 return fn.rawCall(luan,args); |
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391 } catch(IllegalArgumentException e) {} |
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392 } |
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393 } |
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394 for( LuanJavaFunction fn : varArgs ) { |
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395 try { |
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396 return fn.rawCall(luan,args); |
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397 } catch(IllegalArgumentException e) {} |
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398 } |
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399 throw new LuanException("no method matched args: "+Arrays.asList(args)); |
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400 } |
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401 } |
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402 |
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403 private static class InstanceOf { |
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404 private final Object obj; |
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405 |
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406 InstanceOf(Object obj) { |
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407 this.obj = obj; |
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408 } |
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409 |
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410 public boolean instanceOf(Static st) { |
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411 return st.cls.isInstance(obj); |
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412 } |
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413 } |
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414 private static final Method instanceOf; |
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415 static { |
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416 try { |
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417 instanceOf = InstanceOf.class.getMethod("instanceOf",Static.class); |
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418 instanceOf.setAccessible(true); |
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419 } catch(NoSuchMethodException e) { |
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420 throw new RuntimeException(e); |
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421 } |
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422 } |
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423 |
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424 /* |
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425 private static class AssertClass { |
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426 private final Class cls; |
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427 |
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428 AssertClass(Class cls) { |
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429 this.cls = cls; |
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430 } |
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431 |
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432 public Object assertClass(Luan luan,Object v) throws LuanException { |
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433 if( !cls.isInstance(v) ) { |
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434 String got = v.getClass().getSimpleName(); |
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435 String expected = cls.getSimpleName(); |
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436 throw new LuanException(luan,"bad argument #1 ("+expected+" expected, got "+got+")"); |
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437 } |
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438 return v; |
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439 } |
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440 } |
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441 private static final Method assertClass; |
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442 static { |
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443 try { |
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444 assertClass = AssertClass.class.getMethod("assertClass",Luan.class,Object.class); |
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445 assertClass.setAccessible(true); |
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446 } catch(NoSuchMethodException e) { |
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447 throw new RuntimeException(e); |
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448 } |
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449 } |
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450 |
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451 |
1333
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452 public static Object proxy(final Luan luan,Static st,final LuanTable t,final Object base) throws LuanException { |
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453 return Proxy.newProxyInstance( |
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454 st.cls.getClassLoader(), |
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455 new Class[]{st.cls}, |
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456 new InvocationHandler() { |
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457 public Object invoke(Object proxy,Method method, Object[] args) |
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458 throws Throwable |
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459 { |
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460 if( args==null ) |
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461 args = new Object[0]; |
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462 String name = method.getName(); |
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463 Object fnObj = t.get(name); |
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464 if( fnObj==null && base!=null ) |
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465 return method.invoke(base,args); |
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466 LuanFunction fn = luan.checkFunction(fnObj); |
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467 return Luan.first(luan.call(fn,name,args)); |
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468 } |
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469 } |
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470 ); |
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471 } |
304
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472 */ |
301
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473 |
1330 | 474 private void JavaLuan() {} // never |
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475 } |