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annotate core/src/luan/modules/JavaLuan.java @ 297:899253043270

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remove PackageLuan.load_lib() git-svn-id: https://luan-java.googlecode.com/svn/trunk@298 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Tue, 16 Dec 2014 03:26:43 +0000
parents 8ac3eaf8ecd9
children a74559240b4f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
167
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diff changeset
1 package luan.modules;
37
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2
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3 import java.lang.reflect.Array;
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4 import java.lang.reflect.AccessibleObject;
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5 import java.lang.reflect.Member;
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6 import java.lang.reflect.Field;
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7 import java.lang.reflect.Method;
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8 import java.lang.reflect.Constructor;
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9 import java.lang.reflect.Modifier;
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10 import java.lang.reflect.InvocationHandler;
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11 import java.lang.reflect.Proxy;
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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17 import java.util.Collections;
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18 import java.util.Arrays;
48
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19 import luan.Luan;
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20 import luan.LuanState;
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21 import luan.LuanTable;
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22 import luan.LuanException;
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23 import luan.LuanFunction;
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24 import luan.LuanJavaFunction;
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25 import luan.LuanElement;
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
202
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30 private static boolean isLoaded(LuanState luan) {
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31 // return PackageLuan.loaded(luan).get("luan:Java") != null;
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32 return true;
202
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33 }
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34
264
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35 static LuanFunction javaLoader(LuanState luan,String modName) throws LuanException {
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36 if( !isLoaded(luan) )
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37 return null;
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38 final Static s = JavaLuan.getClass(luan,modName);
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39 if( s==null )
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40 return null;
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41 LuanFunction loader = new LuanFunction() {
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42 @Override public Object call(LuanState luan,Object[] args) {
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43 return s;
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44 }
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45 };
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46 return loader;
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47 }
37
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48
208
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49 public static Object __index(LuanState luan,Object obj,Object key) throws LuanException {
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50 if( obj instanceof Static ) {
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51 if( key instanceof String ) {
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52 String name = (String)key;
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53 Static st = (Static)obj;
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54 Class cls = st.cls;
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55 if( "class".equals(name) ) {
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56 return cls;
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57 } else if( "new".equals(name) ) {
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58 Constructor<?>[] constructors = cls.getConstructors();
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59 if( constructors.length > 0 ) {
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60 if( constructors.length==1 ) {
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61 return new LuanJavaFunction(constructors[0],null);
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62 } else {
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63 List<LuanJavaFunction> fns = new ArrayList<LuanJavaFunction>();
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64 for( Constructor constructor : constructors ) {
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65 fns.add(new LuanJavaFunction(constructor,null));
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66 }
208
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67 return new AmbiguousJavaFunction(fns);
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68 }
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69 }
208
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70 } else if( "assert".equals(name) ) {
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71 return new LuanJavaFunction(assertClass,new AssertClass(cls));
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72 } else {
208
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73 List<Member> members = getStaticMembers(cls,name);
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74 if( !members.isEmpty() ) {
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75 return member(null,members);
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76 }
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77 }
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78 }
208
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79 throw luan.exception("invalid member '"+key+"' for: "+obj);
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80 }
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81 Class cls = obj.getClass();
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82 if( cls.isArray() ) {
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83 if( "length".equals(key) ) {
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84 return Array.getLength(obj);
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85 }
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86 Integer i = Luan.asInteger(key);
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87 if( i != null ) {
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88 return Array.get(obj,i);
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89 }
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90 throw luan.exception("invalid member '"+key+"' for java array: "+obj);
37
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91 }
208
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92 if( key instanceof String ) {
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93 String name = (String)key;
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94 if( "instanceof".equals(name) ) {
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95 return new LuanJavaFunction(instanceOf,new InstanceOf(obj));
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96 } else {
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97 List<Member> members = getMembers(cls,name);
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98 if( !members.isEmpty() ) {
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99 if( name.equals("getClass") && !isLoaded(luan) )
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100 return null; // security
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101 return member(obj,members);
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102 }
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103 }
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104 }
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105 // throw luan.exception("invalid member '"+key+"' for java object: "+obj);
297
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106 //System.out.println("invalid member '"+key+"' for java object: "+obj);
208
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107 return null;
37
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108 }
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109
56
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110 private static Object member(Object obj,List<Member> members) throws LuanException {
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111 try {
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112 if( members.size()==1 ) {
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113 Member member = members.get(0);
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114 if( member instanceof Static ) {
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115 return member;
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116 } else if( member instanceof Field ) {
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117 Field field = (Field)member;
157
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118 Object rtn = field.get(obj);
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119 return rtn instanceof Object[] ? Arrays.asList((Object[])rtn) : rtn;
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120 } else {
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121 Method method = (Method)member;
297
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122 return new LuanJavaFunction(method,obj);
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123 }
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124 } else {
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125 List<LuanJavaFunction> fns = new ArrayList<LuanJavaFunction>();
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126 for( Member member : members ) {
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127 Method method = (Method)member;
297
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128 fns.add(new LuanJavaFunction(method,obj));
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129 }
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130 return new AmbiguousJavaFunction(fns);
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131 }
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132 } catch(IllegalAccessException e) {
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133 throw new RuntimeException(e);
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134 }
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135 }
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136
60
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137 public static void __newindex(LuanState luan,Object obj,Object key,Object value) throws LuanException {
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138 if( obj instanceof Static ) {
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139 if( key instanceof String ) {
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140 String name = (String)key;
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141 Static st = (Static)obj;
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142 Class cls = st.cls;
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143 List<Member> members = getStaticMembers(cls,name);
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144 if( !members.isEmpty() ) {
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145 if( members.size() != 1 )
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146 throw new RuntimeException("not field '"+name+"' of "+obj);
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147 setMember(obj,members,value);
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148 return;
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149 }
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150 }
130
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151 throw luan.exception("invalid member '"+key+"' for: "+obj);
60
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152 }
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153 Class cls = obj.getClass();
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154 if( cls.isArray() ) {
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155 Integer i = Luan.asInteger(key);
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156 if( i != null ) {
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157 Array.set(obj,i,value);
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158 return;
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159 }
130
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160 throw luan.exception("invalid member '"+key+"' for java array: "+obj);
60
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161 }
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162 if( key instanceof String ) {
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163 String name = (String)key;
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164 List<Member> members = getMembers(cls,name);
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165 if( !members.isEmpty() ) {
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166 if( members.size() != 1 )
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167 throw new RuntimeException("not field '"+name+"' of "+obj);
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168 setMember(obj,members,value);
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169 return;
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170 }
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171 }
130
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172 throw luan.exception("invalid member '"+key+"' for java object: "+obj);
60
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173 }
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174
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175 private static void setMember(Object obj,List<Member> members,Object value) {
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176 Field field = (Field)members.get(0);
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177 try {
100
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178 try {
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179 field.set(obj,value);
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180 } catch(IllegalArgumentException e) {
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181 Class cls = field.getType();
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182 if( value instanceof Number ) {
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183 Number n = (Number)value;
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184 if( cls.equals(Integer.TYPE) || cls.equals(Integer.class) ) {
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185 int r = n.intValue();
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186 if( r==n.doubleValue() ) {
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187 field.setInt(obj,r);
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188 return;
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189 }
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190 }
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191 }
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192 throw e;
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193 }
60
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194 } catch(IllegalAccessException e) {
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195 throw new RuntimeException(e);
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196 }
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197 }
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198
102
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199 public static boolean privateAccess = false;
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200 private static Map<Class,Map<String,List<Member>>> memberMap = new HashMap<Class,Map<String,List<Member>>>();
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201
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202 private static synchronized List<Member> getMembers(Class cls,String name) {
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203 Map<String,List<Member>> clsMap = memberMap.get(cls);
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204 if( clsMap == null ) {
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205 clsMap = new HashMap<String,List<Member>>();
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206 for( Class c : cls.getClasses() ) {
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207 String s = c.getSimpleName();
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208 List<Member> list = new ArrayList<Member>();
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209 clsMap.put(s,list);
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210 list.add(new Static(c));
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211 }
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212 for( Field field : cls.getFields() ) {
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213 String s = field.getName();
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214 try {
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215 if( !cls.getField(s).equals(field) )
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216 continue; // not accessible
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217 } catch(NoSuchFieldException e) {
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218 throw new RuntimeException(e);
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219 }
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220 List<Member> list = new ArrayList<Member>();
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221 clsMap.put(s,list);
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222 list.add(field);
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223 }
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224 for( Method method : cls.getMethods() ) {
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225 String s = method.getName();
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226 List<Member> list = clsMap.get(s);
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227 if( list == null || !(list.get(0) instanceof Method) ) {
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228 list = new ArrayList<Member>();
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229 clsMap.put(s,list);
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230 }
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231 list.add(method);
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232 }
102
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233 if( privateAccess ) {
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234 for( Method method : cls.getDeclaredMethods() ) {
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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 ) {
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238 list = new ArrayList<Member>();
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239 clsMap.put(s,list);
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240 } else if( !(list.get(0) instanceof Method) )
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241 continue;
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242 if( !list.contains(method) ) {
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243 list.add(method);
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244 }
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245 }
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246 for( Field field : cls.getDeclaredFields() ) {
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247 String s = field.getName();
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248 List<Member> list = clsMap.get(s);
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249 if( list == null ) {
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250 list = new ArrayList<Member>();
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251 clsMap.put(s,list);
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252 list.add(field);
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253 }
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254 }
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255 }
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256 for( List<Member> members : clsMap.values() ) {
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257 for( Member m : members ) {
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258 if( m instanceof AccessibleObject )
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259 ((AccessibleObject)m).setAccessible(true);
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260 }
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261 }
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262 memberMap.put(cls,clsMap);
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263 }
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264 List<Member> rtn = clsMap.get(name);
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265 if( rtn==null )
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266 rtn = Collections.emptyList();
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267 return rtn;
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268 }
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269
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270 private static synchronized List<Member> getStaticMembers(Class cls,String name) {
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271 List<Member> staticMembers = new ArrayList<Member>();
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272 for( Member m : getMembers(cls,name) ) {
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273 if( Modifier.isStatic(m.getModifiers()) )
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274 staticMembers.add(m);
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275 }
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276 return staticMembers;
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277 }
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278
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279 static final class Static implements Member {
37
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280 final Class cls;
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281
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282 Static(Class cls) {
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283 this.cls = cls;
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284 }
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285
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286 @Override public String toString() {
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287 return cls.toString();
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288 }
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289
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290 @Override public Class<?> getDeclaringClass() {
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291 return cls.getDeclaringClass();
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292 }
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293
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294 @Override public String getName() {
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295 return cls.getName();
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296 }
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297
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298 @Override public int getModifiers() {
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299 return cls.getModifiers();
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300 }
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301
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302 @Override public boolean isSynthetic() {
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303 return cls.isSynthetic();
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304 }
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305 }
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306
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307 public static Static getClass(LuanState luan,String name) throws LuanException {
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308 Class cls;
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309 try {
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310 cls = Class.forName(name);
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311 } catch(ClassNotFoundException e) {
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312 try {
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313 cls = Thread.currentThread().getContextClassLoader().loadClass(name);
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314 } catch(ClassNotFoundException e2) {
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315 return null;
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316 }
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317 }
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318 return new Static(cls);
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319 }
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320 /*
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321 public static void importClass(LuanState luan,String name) throws LuanException {
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322 luan.currentEnvironment().put( name.substring(name.lastIndexOf('.')+1), getClass(luan,name) );
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323 }
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324 */
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325 static class AmbiguousJavaFunction extends LuanFunction {
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326 private final Map<Integer,List<LuanJavaFunction>> fnMap = new HashMap<Integer,List<LuanJavaFunction>>();
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327
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328 AmbiguousJavaFunction(List<LuanJavaFunction> fns) {
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329 for( LuanJavaFunction fn : fns ) {
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330 Integer n = fn.getParameterTypes().length;
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331 List<LuanJavaFunction> list = fnMap.get(n);
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332 if( list==null ) {
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333 list = new ArrayList<LuanJavaFunction>();
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334 fnMap.put(n,list);
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335 }
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336 list.add(fn);
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337 }
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338 }
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339
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340 @Override public Object call(LuanState luan,Object[] args) throws LuanException {
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341 for( LuanJavaFunction fn : fnMap.get(args.length) ) {
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342 try {
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343 return fn.rawCall(luan,args);
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344 } catch(IllegalArgumentException e) {}
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345 }
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346 throw luan.exception("no method matched args");
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347 }
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348 }
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349
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350 private static class InstanceOf {
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351 private final Object obj;
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352
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353 InstanceOf(Object obj) {
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354 this.obj = obj;
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355 }
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356
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357 public boolean instanceOf(Static st) {
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358 return st.cls.isInstance(obj);
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359 }
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360 }
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361 private static final Method instanceOf;
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362 static {
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363 try {
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364 instanceOf = InstanceOf.class.getMethod("instanceOf",Static.class);
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365 instanceOf.setAccessible(true);
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366 } catch(NoSuchMethodException e) {
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367 throw new RuntimeException(e);
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368 }
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369 }
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370
61
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371
64
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372 private static class AssertClass {
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373 private final Class cls;
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374
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375 AssertClass(Class cls) {
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376 this.cls = cls;
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377 }
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378
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379 public Object assertClass(LuanState luan,Object v) throws LuanException {
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380 if( !cls.isInstance(v) ) {
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381 String got = v.getClass().getSimpleName();
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382 String expected = cls.getSimpleName();
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383 throw luan.exception("bad argument #1 ("+expected+" expected, got "+got+")");
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384 }
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385 return v;
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386 }
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387 }
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388 private static final Method assertClass;
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389 static {
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390 try {
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391 assertClass = AssertClass.class.getMethod("assertClass",LuanState.class,Object.class);
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392 assertClass.setAccessible(true);
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393 } catch(NoSuchMethodException e) {
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394 throw new RuntimeException(e);
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395 }
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396 }
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397
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diff changeset
398
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diff changeset
399 public static Object proxy(final LuanState luan,Static st,final LuanTable t,final Object base) throws LuanException {
61
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400 return Proxy.newProxyInstance(
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diff changeset
401 st.cls.getClassLoader(),
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diff changeset
402 new Class[]{st.cls},
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diff changeset
403 new InvocationHandler() {
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diff changeset
404 public Object invoke(Object proxy,Method method, Object[] args)
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diff changeset
405 throws Throwable
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diff changeset
406 {
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407 if( args==null )
ebe578282363 minor fix
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408 args = new Object[0];
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183d470be7e8 add java.proxy
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409 String name = method.getName();
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7c05f53ef6cb improve java.proxy
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410 Object fnObj = t.get(name);
7c05f53ef6cb improve java.proxy
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411 if( fnObj==null && base!=null )
7c05f53ef6cb improve java.proxy
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412 return method.invoke(base,args);
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413 LuanFunction fn = luan.checkFunction(fnObj);
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414 return Luan.first(luan.call(fn,name,args));
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415 }
183d470be7e8 add java.proxy
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416 }
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417 );
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418 }
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8a57ebfdfd78 add JavaLib
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419 }