Mercurial Hosting > luan
annotate src/luan/modules/JavaLuan.java @ 1335:e0cf0d108a77
major cleanup
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Thu, 14 Feb 2019 03:10:45 -0700 |
parents | 25746915a241 |
children | 8d95711f6615 |
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; |
50
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4 import java.lang.reflect.AccessibleObject; |
37
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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; |
61
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10 import java.lang.reflect.InvocationHandler; |
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11 import java.lang.reflect.Proxy; |
37
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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; |
48
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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; |
1335 | 25 import luan.LuanCloner; |
37
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26 |
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27 |
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28 public final class JavaLuan { |
37
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29 |
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30 public static void java(Luan luan) throws LuanException { |
1330 | 31 Luan.checkSecurity(luan,"java"); |
32 luan.peek().javaOk = true; | |
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33 } |
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34 |
1335 | 35 public static LuanFunction javaFn(Luan luan) { |
36 LuanFunction fn = (LuanFunction)luan.registry().get("JavaLuan.java"); | |
37 if( fn == null ) { | |
38 try { | |
39 fn = new LuanJavaFunction(luan,JavaLuan.class.getMethod("java",Luan.class),null); | |
40 } catch(NoSuchMethodException e) { | |
41 throw new RuntimeException(e); | |
42 } | |
43 luan.registry().put("JavaLuan.java",fn); | |
321
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44 } |
1335 | 45 return fn; |
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46 } |
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47 |
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48 private static void checkJava(Luan luan) throws LuanException { |
1330 | 49 if( !luan.peek().javaOk ) |
646
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50 throw new LuanException("Java isn't allowed"); |
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51 } |
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52 |
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53 public static Object __index(Luan luan,Object obj,Object key) throws LuanException { |
421
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54 checkJava(luan); |
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55 Class cls; |
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56 if( obj instanceof Static ) { |
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57 Static st = (Static)obj; |
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58 cls = st.cls; |
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59 if( key instanceof String ) { |
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60 String name = (String)key; |
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61 if( "class".equals(name) ) { |
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62 return cls; |
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63 } else if( "new".equals(name) ) { |
437 | 64 Constructor[] constructors = cls.getConstructors(); |
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65 if( constructors.length > 0 ) { |
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66 if( constructors.length==1 ) { |
1335 | 67 return new LuanJavaFunction(luan,constructors[0],null); |
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68 } else { |
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69 List<LuanJavaFunction> fns = new ArrayList<LuanJavaFunction>(); |
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70 for( Constructor constructor : constructors ) { |
1335 | 71 fns.add(new LuanJavaFunction(luan,constructor,null)); |
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72 } |
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73 return new AmbiguousJavaFunction(fns); |
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74 } |
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75 } |
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76 /* |
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77 } else if( "assert".equals(name) ) { |
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78 return new LuanJavaFunction(assertClass,new AssertClass(cls)); |
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79 */ |
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80 } else if( "luan_proxy".equals(name) ) { |
1335 | 81 return new LuanJavaFunction(luan,luan_proxyMethod,st); |
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82 } else { |
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83 List<Member> members = getStaticMembers(cls,name); |
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84 if( !members.isEmpty() ) { |
1335 | 85 return member(luan,null,members); |
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86 } |
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87 } |
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88 } |
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89 } else { |
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90 cls = obj.getClass(); |
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91 if( cls.isArray() ) { |
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92 if( "length".equals(key) ) { |
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93 return Array.getLength(obj); |
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94 } |
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95 Integer i = Luan.asInteger(key); |
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96 if( i != null ) { |
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97 return Array.get(obj,i); |
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98 } |
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99 // throw new LuanException(luan,"invalid member '"+key+"' for java array: "+obj); |
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100 } else if( key instanceof String ) { |
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101 String name = (String)key; |
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102 if( "instanceof".equals(name) ) { |
1335 | 103 return new LuanJavaFunction(luan,instanceOf,new InstanceOf(obj)); |
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104 } else { |
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105 List<Member> members = getMembers(cls,name); |
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106 if( !members.isEmpty() ) { |
1335 | 107 return member(luan,obj,members); |
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108 } |
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109 } |
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110 } |
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111 } |
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112 //System.out.println("invalid member '"+key+"' for java object: "+obj); |
687 | 113 throw new LuanException( "invalid index '"+key+"' for java "+cls ); |
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114 } |
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115 |
1335 | 116 private static Object member(Luan luan,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; |
1335 | 128 return new LuanJavaFunction(luan,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; |
1335 | 134 fns.add(new LuanJavaFunction(luan,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 |
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143 public static void __new_index(Luan luan,Object obj,Object key,Object value) throws LuanException { |
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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 new LuanException(luan,"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 new LuanException(luan,"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 } |
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180 throw new LuanException( "invalid index for java "+cls ); |
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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 List<Member> getMembers(Class cls,String name) { |
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211 Map<String,List<Member>> clsMap; |
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212 synchronized(memberMap) { |
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213 clsMap = memberMap.get(cls); |
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214 if( clsMap == null ) { |
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215 clsMap = new HashMap<String,List<Member>>(); |
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216 for( Class c : cls.getClasses() ) { |
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217 String s = c.getSimpleName(); |
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218 List<Member> list = new ArrayList<Member>(); |
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219 clsMap.put(s,list); |
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220 list.add(new Static(c)); |
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221 } |
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222 for( Field field : cls.getFields() ) { |
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223 String s = field.getName(); |
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224 try { |
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225 if( !cls.getField(s).equals(field) ) |
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226 continue; // not accessible |
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227 } catch(NoSuchFieldException e) { |
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228 throw new RuntimeException(e); |
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229 } |
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230 List<Member> list = new ArrayList<Member>(); |
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231 clsMap.put(s,list); |
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232 list.add(field); |
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233 } |
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234 for( Method method : cls.getMethods() ) { |
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235 String s = method.getName(); |
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236 List<Member> list = clsMap.get(s); |
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237 if( list == null || !(list.get(0) instanceof Method) ) { |
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238 list = new ArrayList<Member>(); |
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239 clsMap.put(s,list); |
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240 } |
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241 list.add(method); |
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242 } |
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243 if( privateAccess ) { |
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244 for( Method method : cls.getDeclaredMethods() ) { |
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245 String s = method.getName(); |
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246 List<Member> list = clsMap.get(s); |
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247 if( list == null ) { |
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248 list = new ArrayList<Member>(); |
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249 clsMap.put(s,list); |
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250 } else if( !(list.get(0) instanceof Method) ) |
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251 continue; |
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252 if( !list.contains(method) ) { |
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253 list.add(method); |
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254 } |
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255 } |
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256 for( Field field : cls.getDeclaredFields() ) { |
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257 String s = field.getName(); |
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258 List<Member> list = clsMap.get(s); |
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259 if( list == null ) { |
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260 list = new ArrayList<Member>(); |
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261 clsMap.put(s,list); |
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262 list.add(field); |
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263 } |
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264 } |
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265 } |
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266 for( List<Member> members : clsMap.values() ) { |
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267 for( Member m : members ) { |
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268 if( m instanceof AccessibleObject ) |
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269 ((AccessibleObject)m).setAccessible(true); |
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270 } |
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271 } |
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272 memberMap.put(cls,clsMap); |
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273 } |
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274 } |
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275 List<Member> rtn = clsMap.get(name); |
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276 if( rtn==null ) |
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277 rtn = Collections.emptyList(); |
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278 return rtn; |
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279 } |
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280 |
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281 private static List<Member> getStaticMembers(Class cls,String name) { |
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282 List<Member> staticMembers = new ArrayList<Member>(); |
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283 for( Member m : getMembers(cls,name) ) { |
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284 if( Modifier.isStatic(m.getModifiers()) ) |
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285 staticMembers.add(m); |
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286 } |
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287 return staticMembers; |
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288 } |
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289 |
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290 static final class Static implements Member { |
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291 final Class cls; |
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292 |
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293 Static(Class cls) { |
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294 this.cls = cls; |
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295 } |
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296 |
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297 @Override public String toString() { |
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298 return cls.toString(); |
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299 } |
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300 |
437 | 301 @Override public Class getDeclaringClass() { |
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302 return cls.getDeclaringClass(); |
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303 } |
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304 |
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305 @Override public String getName() { |
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306 return cls.getName(); |
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307 } |
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308 |
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309 @Override public int getModifiers() { |
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310 return cls.getModifiers(); |
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311 } |
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312 |
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313 @Override public boolean isSynthetic() { |
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314 return cls.isSynthetic(); |
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315 } |
304
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316 |
1335 | 317 public Object luan_proxy(final LuanTable t) throws LuanException { |
304
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318 return Proxy.newProxyInstance( |
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319 cls.getClassLoader(), |
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320 new Class[]{cls}, |
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321 new InvocationHandler() { |
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322 public Object invoke(Object proxy,Method method, Object[] args) |
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323 throws Throwable |
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324 { |
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325 if( args==null ) |
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326 args = new Object[0]; |
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327 String name = method.getName(); |
1267 | 328 Object fnObj = t.get(name); |
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329 if( fnObj == null ) |
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330 throw new NullPointerException("luan_proxy couldn't find method '"+name+"'"); |
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331 LuanFunction fn = Luan.checkFunction(fnObj); |
1335 | 332 return Luan.first(fn.call(args)); |
304
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333 } |
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334 } |
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335 ); |
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336 } |
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337 } |
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338 private static final Method luan_proxyMethod; |
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339 static { |
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340 try { |
1335 | 341 luan_proxyMethod = Static.class.getMethod("luan_proxy",LuanTable.class); |
304
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342 luan_proxyMethod.setAccessible(true); |
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343 } catch(NoSuchMethodException e) { |
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344 throw new RuntimeException(e); |
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345 } |
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346 } |
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347 |
1333
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348 public static Static load(Luan luan,String name) throws LuanException { |
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349 checkJava(luan); |
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350 Class cls; |
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351 try { |
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352 cls = Class.forName(name); |
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353 } catch(ClassNotFoundException e) { |
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354 try { |
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355 cls = Thread.currentThread().getContextClassLoader().loadClass(name); |
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356 } catch(ClassNotFoundException e2) { |
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357 return null; |
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358 } |
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359 } |
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360 return new Static(cls); |
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361 } |
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362 |
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363 private static final Comparator<LuanJavaFunction> varArgsSorter = new Comparator<LuanJavaFunction>() { |
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364 public int compare(LuanJavaFunction fn1,LuanJavaFunction fn2) { |
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365 return fn2.getParameterCount() - fn1.getParameterCount(); |
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366 } |
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367 }; |
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368 |
1335 | 369 private static final class AmbiguousJavaFunction extends LuanFunction { |
370 private Map<Integer,List<LuanJavaFunction>> fnMap = new HashMap<Integer,List<LuanJavaFunction>>(); | |
1120
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371 private List<LuanJavaFunction> varArgs = new ArrayList<LuanJavaFunction>(); |
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372 |
48
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373 AmbiguousJavaFunction(List<LuanJavaFunction> fns) { |
1335 | 374 super(true); |
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375 for( LuanJavaFunction fn : fns ) { |
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376 if( fn.isVarArgs() ) { |
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377 varArgs.add(fn); |
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378 } else { |
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379 Integer n = fn.getParameterCount(); |
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380 List<LuanJavaFunction> list = fnMap.get(n); |
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381 if( list==null ) { |
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382 list = new ArrayList<LuanJavaFunction>(); |
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383 fnMap.put(n,list); |
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384 } |
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385 list.add(fn); |
37
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386 } |
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387 } |
1120
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388 Collections.sort(varArgs,varArgsSorter); |
37
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389 } |
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390 |
1335 | 391 @Override protected void completeClone(LuanFunction dc,LuanCloner cloner) { |
392 AmbiguousJavaFunction clone = (AmbiguousJavaFunction)dc; | |
393 clone.fnMap = (Map)cloner.clone(fnMap); | |
394 clone.varArgs = (List)cloner.clone(varArgs); | |
395 } | |
396 | |
397 @Override public Object call(Object[] args) throws LuanException { | |
1120
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398 List<LuanJavaFunction> list = fnMap.get(args.length); |
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399 if( list != null ) { |
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400 for( LuanJavaFunction fn : list ) { |
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401 try { |
1335 | 402 return fn.rawCall(args); |
1120
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403 } catch(IllegalArgumentException e) {} |
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404 } |
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405 } |
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406 for( LuanJavaFunction fn : varArgs ) { |
37
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407 try { |
1335 | 408 return fn.rawCall(args); |
37
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409 } catch(IllegalArgumentException e) {} |
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|
410 } |
646
cdc70de628b5
simplify LuanException
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411 throw new LuanException("no method matched args: "+Arrays.asList(args)); |
37
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412 } |
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413 } |
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414 |
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|
415 private static class InstanceOf { |
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|
416 private final Object obj; |
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417 |
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418 InstanceOf(Object obj) { |
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419 this.obj = obj; |
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420 } |
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421 |
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422 public boolean instanceOf(Static st) { |
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423 return st.cls.isInstance(obj); |
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424 } |
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425 } |
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426 private static final Method instanceOf; |
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427 static { |
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428 try { |
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429 instanceOf = InstanceOf.class.getMethod("instanceOf",Static.class); |
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430 instanceOf.setAccessible(true); |
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431 } catch(NoSuchMethodException e) { |
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432 throw new RuntimeException(e); |
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433 } |
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434 } |
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435 |
304
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436 /* |
64
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437 private static class AssertClass { |
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438 private final Class cls; |
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439 |
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440 AssertClass(Class cls) { |
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441 this.cls = cls; |
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442 } |
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443 |
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444 public Object assertClass(Luan luan,Object v) throws LuanException { |
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445 if( !cls.isInstance(v) ) { |
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446 String got = v.getClass().getSimpleName(); |
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447 String expected = cls.getSimpleName(); |
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448 throw new LuanException(luan,"bad argument #1 ("+expected+" expected, got "+got+")"); |
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449 } |
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450 return v; |
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451 } |
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452 } |
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453 private static final Method assertClass; |
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454 static { |
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455 try { |
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456 assertClass = AssertClass.class.getMethod("assertClass",Luan.class,Object.class); |
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457 assertClass.setAccessible(true); |
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458 } catch(NoSuchMethodException e) { |
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459 throw new RuntimeException(e); |
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460 } |
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461 } |
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462 |
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463 |
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464 public static Object proxy(final Luan luan,Static st,final LuanTable t,final Object base) throws LuanException { |
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465 return Proxy.newProxyInstance( |
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466 st.cls.getClassLoader(), |
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467 new Class[]{st.cls}, |
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468 new InvocationHandler() { |
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469 public Object invoke(Object proxy,Method method, Object[] args) |
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470 throws Throwable |
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471 { |
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472 if( args==null ) |
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473 args = new Object[0]; |
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474 String name = method.getName(); |
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475 Object fnObj = t.get(name); |
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476 if( fnObj==null && base!=null ) |
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477 return method.invoke(base,args); |
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478 LuanFunction fn = luan.checkFunction(fnObj); |
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479 return Luan.first(luan.call(fn,name,args)); |
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480 } |
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481 } |
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482 ); |
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483 } |
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484 */ |
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485 |
1330 | 486 private void JavaLuan() {} // never |
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487 } |