Mercurial Hosting > luan
annotate src/luan/modules/JavaLuan.java @ 1802:ca98dee04e08 default tip
add Parsers.json_null
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Sun, 21 Apr 2024 21:25:15 -0600 |
parents | 8dd8c556c449 |
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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; |
50
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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; |
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; |
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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 private static void checkJava(Luan luan) throws LuanException { |
1330 | 35 if( !luan.peek().javaOk ) |
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36 throw new LuanException("Java isn't allowed"); |
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37 } |
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38 |
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39 public static Object __index(Luan luan,Object obj,Object key) throws LuanException { |
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40 checkJava(luan); |
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41 Class cls; |
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42 if( obj instanceof Static ) { |
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43 Static st = (Static)obj; |
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44 cls = st.cls; |
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45 if( key instanceof String ) { |
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46 String name = (String)key; |
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47 if( "class".equals(name) ) { |
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48 return cls; |
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49 } else if( "new".equals(name) ) { |
437 | 50 Constructor[] constructors = cls.getConstructors(); |
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51 if( constructors.length > 0 ) { |
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52 if( constructors.length==1 ) { |
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53 return new LuanJavaFunction(constructors[0],null); |
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54 } else { |
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55 List<LuanJavaFunction> fns = new ArrayList<LuanJavaFunction>(); |
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56 for( Constructor constructor : constructors ) { |
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57 fns.add(new LuanJavaFunction(constructor,null)); |
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58 } |
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59 return new AmbiguousJavaFunction(fns); |
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60 } |
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61 } |
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62 /* |
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63 } else if( "assert".equals(name) ) { |
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64 return new LuanJavaFunction(assertClass,new AssertClass(cls)); |
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65 */ |
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66 } else if( "luan_proxy".equals(name) ) { |
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67 return new LuanJavaFunction(luan_proxyMethod,st); |
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68 } else { |
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69 List<Member> members = getStaticMembers(cls,name); |
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70 if( !members.isEmpty() ) { |
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71 return member(null,members); |
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72 } |
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73 } |
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74 } |
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75 } else { |
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76 cls = obj.getClass(); |
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77 if( cls.isArray() ) { |
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78 if( "length".equals(key) ) { |
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79 return Array.getLength(obj); |
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80 } |
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81 Integer i = Luan.asInteger(key); |
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82 if( i != null ) { |
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83 return Array.get(obj,i); |
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84 } |
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85 // throw new LuanException(luan,"invalid member '"+key+"' for java array: "+obj); |
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86 } else if( key instanceof String ) { |
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87 String name = (String)key; |
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88 if( "instanceof".equals(name) ) { |
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89 return new LuanJavaFunction(instanceOf,new InstanceOf(obj)); |
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90 } else { |
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91 List<Member> members = getMembers(cls,name); |
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92 if( !members.isEmpty() ) { |
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93 return member(obj,members); |
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94 } |
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95 } |
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96 } |
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97 } |
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98 //System.out.println("invalid member '"+key+"' for java object: "+obj); |
687 | 99 throw new LuanException( "invalid index '"+key+"' for java "+cls ); |
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100 } |
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101 |
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102 private static Object member(Object obj,List<Member> members) throws LuanException { |
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103 try { |
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104 if( members.size()==1 ) { |
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105 Member member = members.get(0); |
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106 if( member instanceof Static ) { |
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107 return member; |
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108 } else if( member instanceof Field ) { |
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109 Field field = (Field)member; |
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110 Object rtn = field.get(obj); |
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111 return rtn instanceof Object[] ? Arrays.asList((Object[])rtn) : rtn; |
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112 } else { |
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113 Method method = (Method)member; |
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114 return new LuanJavaFunction(method,obj); |
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115 } |
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116 } else { |
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117 List<LuanJavaFunction> fns = new ArrayList<LuanJavaFunction>(); |
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118 for( Member member : members ) { |
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119 Method method = (Method)member; |
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120 fns.add(new LuanJavaFunction(method,obj)); |
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121 } |
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122 return new AmbiguousJavaFunction(fns); |
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123 } |
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124 } catch(IllegalAccessException e) { |
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125 throw new RuntimeException(e); |
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126 } |
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127 } |
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128 |
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129 public static void __new_index(Luan luan,Object obj,Object key,Object value) throws LuanException { |
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130 checkJava(luan); |
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131 Class cls; |
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132 if( obj instanceof Static ) { |
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133 Static st = (Static)obj; |
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134 cls = st.cls; |
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135 if( key instanceof String ) { |
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136 String name = (String)key; |
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137 List<Member> members = getStaticMembers(cls,name); |
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138 if( !members.isEmpty() ) { |
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139 if( members.size() != 1 ) |
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140 throw new RuntimeException("not field '"+name+"' of "+obj); |
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141 setMember(obj,members,value); |
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142 return; |
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143 } |
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144 } |
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145 // throw new LuanException(luan,"invalid member '"+key+"' for: "+obj); |
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146 } else { |
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147 cls = obj.getClass(); |
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148 if( cls.isArray() ) { |
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149 Integer i = Luan.asInteger(key); |
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150 if( i != null ) { |
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151 Array.set(obj,i,value); |
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152 return; |
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153 } |
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154 // throw new LuanException(luan,"invalid member '"+key+"' for java array: "+obj); |
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155 } else if( key instanceof String ) { |
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156 String name = (String)key; |
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157 List<Member> members = getMembers(cls,name); |
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158 if( !members.isEmpty() ) { |
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159 if( members.size() != 1 ) |
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160 throw new RuntimeException("not field '"+name+"' of "+obj); |
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161 setMember(obj,members,value); |
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162 return; |
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163 } |
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164 } |
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165 } |
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166 throw new LuanException( "invalid index for java "+cls ); |
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167 } |
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168 |
1672 | 169 private static void setMember(Object obj,List<Member> members,Object value) throws LuanException { |
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170 Field field = (Field)members.get(0); |
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171 try { |
1672 | 172 /* |
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173 try { |
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174 field.set(obj,value); |
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175 } catch(IllegalArgumentException e) { |
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176 Class cls = field.getType(); |
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177 if( value instanceof Number ) { |
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178 Number n = (Number)value; |
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179 if( cls.equals(Integer.TYPE) || cls.equals(Integer.class) ) { |
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180 int r = n.intValue(); |
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181 if( r==n.doubleValue() ) { |
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182 field.setInt(obj,r); |
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183 return; |
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184 } |
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185 } |
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186 } |
1672 | 187 throw new LuanException(e); |
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188 } |
1672 | 189 */ |
190 Class cls = field.getType(); | |
191 LuanJavaFunction.ArgConverter ac = LuanJavaFunction.getArgConverter(cls); | |
192 field.set( obj, ac.convert(value) ); | |
193 } catch(IllegalArgumentException e) { | |
194 throw new LuanException(e); | |
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195 } catch(IllegalAccessException e) { |
1672 | 196 throw new LuanException(e); |
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197 } |
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198 } |
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199 |
102
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200 public static boolean privateAccess = false; |
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201 private static Map<Class,Map<String,List<Member>>> memberMap = new HashMap<Class,Map<String,List<Member>>>(); |
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202 |
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203 private static List<Member> getMembers(Class cls,String name) { |
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204 Map<String,List<Member>> clsMap; |
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205 synchronized(memberMap) { |
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206 clsMap = memberMap.get(cls); |
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207 if( clsMap == null ) { |
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208 clsMap = new HashMap<String,List<Member>>(); |
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209 for( Class c : cls.getClasses() ) { |
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210 String s = c.getSimpleName(); |
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211 List<Member> list = new ArrayList<Member>(); |
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212 clsMap.put(s,list); |
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213 list.add(new Static(c)); |
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214 } |
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215 for( Field field : cls.getFields() ) { |
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216 String s = field.getName(); |
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217 try { |
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218 if( !cls.getField(s).equals(field) ) |
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219 continue; // not accessible |
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220 } catch(NoSuchFieldException e) { |
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221 throw new RuntimeException(e); |
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222 } |
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223 List<Member> list = new ArrayList<Member>(); |
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224 clsMap.put(s,list); |
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225 list.add(field); |
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226 } |
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227 for( Method method : cls.getMethods() ) { |
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228 String s = method.getName(); |
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229 List<Member> list = clsMap.get(s); |
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230 if( list == null || !(list.get(0) instanceof Method) ) { |
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231 list = new ArrayList<Member>(); |
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232 clsMap.put(s,list); |
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233 } |
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234 list.add(method); |
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235 } |
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236 if( privateAccess ) { |
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237 for( Method method : cls.getDeclaredMethods() ) { |
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238 String s = method.getName(); |
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239 List<Member> list = clsMap.get(s); |
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240 if( list == null ) { |
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241 list = new ArrayList<Member>(); |
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242 clsMap.put(s,list); |
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243 } else if( !(list.get(0) instanceof Method) ) |
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244 continue; |
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245 if( !list.contains(method) ) { |
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246 list.add(method); |
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247 } |
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248 } |
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249 for( Field field : cls.getDeclaredFields() ) { |
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250 String s = field.getName(); |
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251 List<Member> list = clsMap.get(s); |
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252 if( list == null ) { |
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253 list = new ArrayList<Member>(); |
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254 clsMap.put(s,list); |
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255 list.add(field); |
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256 } |
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257 } |
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258 } |
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259 for( List<Member> members : clsMap.values() ) { |
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260 for( Member m : members ) { |
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261 if( m instanceof AccessibleObject ) |
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262 ((AccessibleObject)m).setAccessible(true); |
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263 } |
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264 } |
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265 memberMap.put(cls,clsMap); |
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266 } |
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267 } |
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268 List<Member> rtn = clsMap.get(name); |
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269 if( rtn==null ) |
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270 rtn = Collections.emptyList(); |
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271 return rtn; |
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272 } |
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273 |
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274 private static List<Member> getStaticMembers(Class cls,String name) { |
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275 List<Member> staticMembers = new ArrayList<Member>(); |
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276 for( Member m : getMembers(cls,name) ) { |
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277 if( Modifier.isStatic(m.getModifiers()) ) |
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278 staticMembers.add(m); |
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279 } |
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280 return staticMembers; |
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281 } |
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282 |
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283 static final class Static implements Member { |
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284 final Class cls; |
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285 |
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286 Static(Class cls) { |
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287 this.cls = cls; |
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288 } |
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289 |
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290 @Override public String toString() { |
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291 return cls.toString(); |
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292 } |
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293 |
437 | 294 @Override public Class getDeclaringClass() { |
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295 return cls.getDeclaringClass(); |
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296 } |
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297 |
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298 @Override public String getName() { |
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299 return cls.getName(); |
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300 } |
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301 |
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302 @Override public int getModifiers() { |
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303 return cls.getModifiers(); |
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304 } |
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305 |
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306 @Override public boolean isSynthetic() { |
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307 return cls.isSynthetic(); |
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308 } |
304
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309 |
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310 public Object luan_proxy(final Luan luan,final LuanTable t) throws LuanException { |
304
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311 return Proxy.newProxyInstance( |
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312 cls.getClassLoader(), |
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313 new Class[]{cls}, |
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314 new InvocationHandler() { |
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315 public Object invoke(Object proxy,Method method, Object[] args) |
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316 throws Throwable |
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317 { |
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318 if( args==null ) |
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319 args = new Object[0]; |
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320 String name = method.getName(); |
1562 | 321 Object fnObj = t.get(luan,name); |
502
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322 if( fnObj == null ) |
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323 throw new NullPointerException("luan_proxy couldn't find method '"+name+"'"); |
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324 LuanFunction fn = Luan.checkFunction(fnObj); |
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325 return Luan.first(fn.call(luan,args)); |
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326 } |
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327 } |
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328 ); |
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329 } |
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330 } |
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331 private static final Method luan_proxyMethod; |
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332 static { |
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333 try { |
1562 | 334 luan_proxyMethod = Static.class.getMethod("luan_proxy",Luan.class,LuanTable.class); |
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335 luan_proxyMethod.setAccessible(true); |
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336 } catch(NoSuchMethodException e) { |
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337 throw new RuntimeException(e); |
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338 } |
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339 } |
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340 |
1333
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341 public static Static load(Luan luan,String name) throws LuanException { |
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342 checkJava(luan); |
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343 Class cls; |
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344 try { |
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345 cls = Class.forName(name); |
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346 } catch(ClassNotFoundException e) { |
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347 try { |
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348 cls = Thread.currentThread().getContextClassLoader().loadClass(name); |
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349 } catch(ClassNotFoundException e2) { |
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350 return null; |
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351 } |
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352 } |
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353 return new Static(cls); |
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354 } |
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355 |
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356 private static final Comparator<LuanJavaFunction> varArgsSorter = new Comparator<LuanJavaFunction>() { |
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357 public int compare(LuanJavaFunction fn1,LuanJavaFunction fn2) { |
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358 return fn2.getParameterCount() - fn1.getParameterCount(); |
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359 } |
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360 }; |
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361 |
1335 | 362 private static final class AmbiguousJavaFunction extends LuanFunction { |
363 private Map<Integer,List<LuanJavaFunction>> fnMap = new HashMap<Integer,List<LuanJavaFunction>>(); | |
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364 private List<LuanJavaFunction> varArgs = new ArrayList<LuanJavaFunction>(); |
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365 |
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366 AmbiguousJavaFunction(List<LuanJavaFunction> fns) { |
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367 for( LuanJavaFunction fn : fns ) { |
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368 if( fn.isVarArgs() ) { |
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369 varArgs.add(fn); |
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370 } else { |
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371 Integer n = fn.getParameterCount(); |
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372 List<LuanJavaFunction> list = fnMap.get(n); |
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373 if( list==null ) { |
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374 list = new ArrayList<LuanJavaFunction>(); |
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375 fnMap.put(n,list); |
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376 } |
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377 list.add(fn); |
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378 } |
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379 } |
1120
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380 Collections.sort(varArgs,varArgsSorter); |
37
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381 } |
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|
382 |
1563
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383 @Override public Object call(Luan luan,Object[] args) throws LuanException { |
1120
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384 List<LuanJavaFunction> list = fnMap.get(args.length); |
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385 if( list != null ) { |
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386 for( LuanJavaFunction fn : list ) { |
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387 try { |
1563
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388 return fn.rawCall(luan,args); |
1120
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389 } catch(IllegalArgumentException e) {} |
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390 } |
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391 } |
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392 for( LuanJavaFunction fn : varArgs ) { |
37
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393 try { |
1563
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394 return fn.rawCall(luan,args); |
37
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395 } catch(IllegalArgumentException e) {} |
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|
396 } |
646
cdc70de628b5
simplify LuanException
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397 throw new LuanException("no method matched args: "+Arrays.asList(args)); |
37
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398 } |
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399 } |
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400 |
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|
401 private static class InstanceOf { |
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|
402 private final Object obj; |
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|
403 |
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|
404 InstanceOf(Object obj) { |
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|
405 this.obj = obj; |
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|
406 } |
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407 |
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|
408 public boolean instanceOf(Static st) { |
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409 return st.cls.isInstance(obj); |
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410 } |
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411 } |
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|
412 private static final Method instanceOf; |
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|
413 static { |
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414 try { |
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|
415 instanceOf = InstanceOf.class.getMethod("instanceOf",Static.class); |
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|
416 instanceOf.setAccessible(true); |
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|
417 } catch(NoSuchMethodException e) { |
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418 throw new RuntimeException(e); |
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419 } |
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420 } |
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421 |
304
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422 /* |
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diff
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|
423 private static class AssertClass { |
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424 private final Class cls; |
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425 |
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426 AssertClass(Class cls) { |
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427 this.cls = cls; |
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428 } |
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429 |
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430 public Object assertClass(Luan luan,Object v) throws LuanException { |
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431 if( !cls.isInstance(v) ) { |
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432 String got = v.getClass().getSimpleName(); |
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433 String expected = cls.getSimpleName(); |
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434 throw new LuanException(luan,"bad argument #1 ("+expected+" expected, got "+got+")"); |
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435 } |
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436 return v; |
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437 } |
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438 } |
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439 private static final Method assertClass; |
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440 static { |
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441 try { |
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442 assertClass = AssertClass.class.getMethod("assertClass",Luan.class,Object.class); |
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443 assertClass.setAccessible(true); |
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444 } catch(NoSuchMethodException e) { |
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445 throw new RuntimeException(e); |
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446 } |
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447 } |
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448 |
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449 |
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450 public static Object proxy(final Luan luan,Static st,final LuanTable t,final Object base) throws LuanException { |
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451 return Proxy.newProxyInstance( |
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452 st.cls.getClassLoader(), |
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453 new Class[]{st.cls}, |
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454 new InvocationHandler() { |
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455 public Object invoke(Object proxy,Method method, Object[] args) |
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456 throws Throwable |
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457 { |
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458 if( args==null ) |
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459 args = new Object[0]; |
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460 String name = method.getName(); |
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461 Object fnObj = t.get(name); |
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462 if( fnObj==null && base!=null ) |
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463 return method.invoke(base,args); |
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464 LuanFunction fn = luan.checkFunction(fnObj); |
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465 return Luan.first(luan.call(fn,name,args)); |
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466 } |
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467 } |
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468 ); |
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469 } |
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470 */ |
301
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471 |
1330 | 472 private void JavaLuan() {} // never |
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473 } |