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annotate core/src/luan/modules/JavaLuan.java @ 320:fed1893821bf

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remove global namespace git-svn-id: https://luan-java.googlecode.com/svn/trunk@321 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Fri, 06 Feb 2015 21:54:41 +0000
parents 03e9cda4748d
children 7f7708e8fdd4
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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;
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;
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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;
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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
301
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30 public static void java(LuanState luan) throws LuanException {
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31 check(luan,luan.currentSource().name);
300
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32 luan.currentEnvironment().setJava();
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33 }
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34
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35 private static void checkJava(LuanState luan) throws LuanException {
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36 if( !luan.currentEnvironment().hasJava() )
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37 throw luan.exception("Java isn't allowed");
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38 }
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39
202
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40 private static boolean isLoaded(LuanState luan) {
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41 // return PackageLuan.loaded(luan).get("luan:Java") != null;
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42 return true;
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43 }
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44
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45 public static Object __index(LuanState luan,Object obj,Object key) throws LuanException {
300
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46 if( !luan.currentEnvironment().hasJava() )
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47 return null;
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48 if( obj instanceof Static ) {
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49 if( key instanceof String ) {
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50 String name = (String)key;
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51 Static st = (Static)obj;
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52 Class cls = st.cls;
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53 if( "class".equals(name) ) {
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54 return cls;
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55 } else if( "new".equals(name) ) {
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56 Constructor<?>[] constructors = cls.getConstructors();
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57 if( constructors.length > 0 ) {
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58 if( constructors.length==1 ) {
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59 return new LuanJavaFunction(constructors[0],null);
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60 } else {
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61 List<LuanJavaFunction> fns = new ArrayList<LuanJavaFunction>();
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62 for( Constructor constructor : constructors ) {
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63 fns.add(new LuanJavaFunction(constructor,null));
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64 }
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65 return new AmbiguousJavaFunction(fns);
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66 }
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67 }
304
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68 /*
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69 } else if( "assert".equals(name) ) {
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70 return new LuanJavaFunction(assertClass,new AssertClass(cls));
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71 */
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72 } else if( "luan_proxy".equals(name) ) {
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73 return new LuanJavaFunction(luan_proxyMethod,st);
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74 } else {
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75 List<Member> members = getStaticMembers(cls,name);
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76 if( !members.isEmpty() ) {
208
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77 return member(null,members);
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78 }
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79 }
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80 }
208
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81 throw luan.exception("invalid member '"+key+"' for: "+obj);
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82 }
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83 Class cls = obj.getClass();
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84 if( cls.isArray() ) {
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85 if( "length".equals(key) ) {
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86 return Array.getLength(obj);
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87 }
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88 Integer i = Luan.asInteger(key);
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89 if( i != null ) {
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90 return Array.get(obj,i);
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91 }
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92 throw luan.exception("invalid member '"+key+"' for java array: "+obj);
37
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93 }
208
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94 if( key instanceof String ) {
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95 String name = (String)key;
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96 if( "instanceof".equals(name) ) {
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97 return new LuanJavaFunction(instanceOf,new InstanceOf(obj));
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98 } else {
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99 List<Member> members = getMembers(cls,name);
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100 if( !members.isEmpty() ) {
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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>();
56
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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 {
300
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138 checkJava(luan);
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139 if( obj instanceof Static ) {
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140 if( key instanceof String ) {
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141 String name = (String)key;
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142 Static st = (Static)obj;
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143 Class cls = st.cls;
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144 List<Member> members = getStaticMembers(cls,name);
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145 if( !members.isEmpty() ) {
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146 if( members.size() != 1 )
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147 throw new RuntimeException("not field '"+name+"' of "+obj);
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148 setMember(obj,members,value);
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149 return;
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150 }
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151 }
130
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152 throw luan.exception("invalid member '"+key+"' for: "+obj);
60
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153 }
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154 Class cls = obj.getClass();
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155 if( cls.isArray() ) {
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156 Integer i = Luan.asInteger(key);
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157 if( i != null ) {
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158 Array.set(obj,i,value);
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159 return;
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160 }
130
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161 throw luan.exception("invalid member '"+key+"' for java array: "+obj);
60
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162 }
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163 if( key instanceof String ) {
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164 String name = (String)key;
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165 List<Member> members = getMembers(cls,name);
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166 if( !members.isEmpty() ) {
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167 if( members.size() != 1 )
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168 throw new RuntimeException("not field '"+name+"' of "+obj);
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169 setMember(obj,members,value);
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170 return;
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171 }
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172 }
130
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173 throw luan.exception("invalid member '"+key+"' for java object: "+obj);
60
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174 }
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175
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diff changeset
176 private static void setMember(Object obj,List<Member> members,Object value) {
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177 Field field = (Field)members.get(0);
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178 try {
100
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179 try {
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180 field.set(obj,value);
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181 } catch(IllegalArgumentException e) {
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182 Class cls = field.getType();
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183 if( value instanceof Number ) {
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184 Number n = (Number)value;
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185 if( cls.equals(Integer.TYPE) || cls.equals(Integer.class) ) {
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186 int r = n.intValue();
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187 if( r==n.doubleValue() ) {
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188 field.setInt(obj,r);
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189 return;
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190 }
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191 }
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192 }
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193 throw e;
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194 }
60
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195 } catch(IllegalAccessException e) {
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196 throw new RuntimeException(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 synchronized List<Member> getMembers(Class cls,String name) {
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204 Map<String,List<Member>> clsMap = memberMap.get(cls);
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205 if( clsMap == null ) {
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206 clsMap = new HashMap<String,List<Member>>();
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207 for( Class c : cls.getClasses() ) {
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208 String s = c.getSimpleName();
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209 List<Member> list = new ArrayList<Member>();
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210 clsMap.put(s,list);
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211 list.add(new Static(c));
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212 }
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213 for( Field field : cls.getFields() ) {
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214 String s = field.getName();
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215 try {
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216 if( !cls.getField(s).equals(field) )
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217 continue; // not accessible
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218 } catch(NoSuchFieldException e) {
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219 throw new RuntimeException(e);
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220 }
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221 List<Member> list = new ArrayList<Member>();
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222 clsMap.put(s,list);
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223 list.add(field);
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224 }
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225 for( Method method : cls.getMethods() ) {
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226 String s = method.getName();
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227 List<Member> list = clsMap.get(s);
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228 if( list == null || !(list.get(0) instanceof Method) ) {
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229 list = new ArrayList<Member>();
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230 clsMap.put(s,list);
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231 }
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232 list.add(method);
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233 }
102
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234 if( privateAccess ) {
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235 for( Method method : cls.getDeclaredMethods() ) {
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236 String s = method.getName();
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237 List<Member> list = clsMap.get(s);
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238 if( list == null ) {
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239 list = new ArrayList<Member>();
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240 clsMap.put(s,list);
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241 } else if( !(list.get(0) instanceof Method) )
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242 continue;
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243 if( !list.contains(method) ) {
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244 list.add(method);
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245 }
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246 }
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247 for( Field field : cls.getDeclaredFields() ) {
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248 String s = field.getName();
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249 List<Member> list = clsMap.get(s);
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250 if( list == null ) {
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251 list = new ArrayList<Member>();
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252 clsMap.put(s,list);
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253 list.add(field);
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254 }
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255 }
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256 }
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257 for( List<Member> members : clsMap.values() ) {
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258 for( Member m : members ) {
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259 if( m instanceof AccessibleObject )
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260 ((AccessibleObject)m).setAccessible(true);
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261 }
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262 }
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263 memberMap.put(cls,clsMap);
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264 }
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265 List<Member> rtn = clsMap.get(name);
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266 if( rtn==null )
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267 rtn = Collections.emptyList();
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268 return rtn;
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269 }
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270
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271 private static synchronized List<Member> getStaticMembers(Class cls,String name) {
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272 List<Member> staticMembers = new ArrayList<Member>();
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273 for( Member m : getMembers(cls,name) ) {
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274 if( Modifier.isStatic(m.getModifiers()) )
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275 staticMembers.add(m);
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276 }
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277 return staticMembers;
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278 }
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279
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280 static final class Static implements Member {
37
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281 final Class cls;
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282
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283 Static(Class cls) {
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284 this.cls = cls;
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285 }
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286
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287 @Override public String toString() {
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288 return cls.toString();
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289 }
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290
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291 @Override public Class<?> getDeclaringClass() {
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292 return cls.getDeclaringClass();
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293 }
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294
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295 @Override public String getName() {
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296 return cls.getName();
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297 }
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298
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299 @Override public int getModifiers() {
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300 return cls.getModifiers();
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301 }
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302
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303 @Override public boolean isSynthetic() {
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304 return cls.isSynthetic();
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diff changeset
305 }
304
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306
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307 public Object luan_proxy(final LuanState luan,final LuanTable t,final Object base) throws LuanException {
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308 return Proxy.newProxyInstance(
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309 cls.getClassLoader(),
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310 new Class[]{cls},
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311 new InvocationHandler() {
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312 public Object invoke(Object proxy,Method method, Object[] args)
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diff changeset
313 throws Throwable
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314 {
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315 if( args==null )
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316 args = new Object[0];
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317 String name = method.getName();
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318 Object fnObj = t.get(name);
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diff changeset
319 if( fnObj==null && base!=null )
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diff changeset
320 return method.invoke(base,args);
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321 LuanFunction fn = luan.checkFunction(fnObj);
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322 return Luan.first(luan.call(fn,name,args));
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323 }
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diff changeset
324 }
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diff changeset
325 );
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326 }
03e9cda4748d add JavaLuan.Static.luan_proxy()
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diff changeset
327 }
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diff changeset
328 private static final Method luan_proxyMethod;
03e9cda4748d add JavaLuan.Static.luan_proxy()
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diff changeset
329 static {
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diff changeset
330 try {
03e9cda4748d add JavaLuan.Static.luan_proxy()
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diff changeset
331 luan_proxyMethod = Static.class.getMethod("luan_proxy",LuanState.class,LuanTable.class,Object.class);
03e9cda4748d add JavaLuan.Static.luan_proxy()
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diff changeset
332 luan_proxyMethod.setAccessible(true);
03e9cda4748d add JavaLuan.Static.luan_proxy()
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diff changeset
333 } catch(NoSuchMethodException e) {
03e9cda4748d add JavaLuan.Static.luan_proxy()
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diff changeset
334 throw new RuntimeException(e);
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diff changeset
335 }
37
8a57ebfdfd78 add JavaLib
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336 }
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337
299
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diff changeset
338 public static Static load(LuanState luan,String name) throws LuanException {
300
9fb523472035 add java() to control java access
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diff changeset
339 checkJava(luan);
51
28dfd91a816c various small issues
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diff changeset
340 Class cls;
37
8a57ebfdfd78 add JavaLib
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diff changeset
341 try {
51
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diff changeset
342 cls = Class.forName(name);
37
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343 } catch(ClassNotFoundException e) {
51
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diff changeset
344 try {
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diff changeset
345 cls = Thread.currentThread().getContextClassLoader().loadClass(name);
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diff changeset
346 } catch(ClassNotFoundException e2) {
108
3c404a296995 make Package module more standard;
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diff changeset
347 return null;
51
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diff changeset
348 }
37
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349 }
51
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diff changeset
350 return new Static(cls);
37
8a57ebfdfd78 add JavaLib
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351 }
300
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diff changeset
352
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diff changeset
353 private static class AmbiguousJavaFunction extends LuanFunction {
48
64ecb7a3aad7 rename Lua to Luan
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diff changeset
354 private final Map<Integer,List<LuanJavaFunction>> fnMap = new HashMap<Integer,List<LuanJavaFunction>>();
37
8a57ebfdfd78 add JavaLib
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diff changeset
355
48
64ecb7a3aad7 rename Lua to Luan
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diff changeset
356 AmbiguousJavaFunction(List<LuanJavaFunction> fns) {
64ecb7a3aad7 rename Lua to Luan
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diff changeset
357 for( LuanJavaFunction fn : fns ) {
37
8a57ebfdfd78 add JavaLib
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diff changeset
358 Integer n = fn.getParameterTypes().length;
48
64ecb7a3aad7 rename Lua to Luan
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diff changeset
359 List<LuanJavaFunction> list = fnMap.get(n);
37
8a57ebfdfd78 add JavaLib
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diff changeset
360 if( list==null ) {
48
64ecb7a3aad7 rename Lua to Luan
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diff changeset
361 list = new ArrayList<LuanJavaFunction>();
37
8a57ebfdfd78 add JavaLib
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diff changeset
362 fnMap.put(n,list);
8a57ebfdfd78 add JavaLib
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diff changeset
363 }
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diff changeset
364 list.add(fn);
8a57ebfdfd78 add JavaLib
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diff changeset
365 }
8a57ebfdfd78 add JavaLib
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diff changeset
366 }
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diff changeset
367
112
f5af13062b10 fix previous rev
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parents: 108
diff changeset
368 @Override public Object call(LuanState luan,Object[] args) throws LuanException {
48
64ecb7a3aad7 rename Lua to Luan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 46
diff changeset
369 for( LuanJavaFunction fn : fnMap.get(args.length) ) {
37
8a57ebfdfd78 add JavaLib
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parents:
diff changeset
370 try {
55
9381b23ea9e1 various fixes
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 51
diff changeset
371 return fn.rawCall(luan,args);
37
8a57ebfdfd78 add JavaLib
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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diff changeset
372 } catch(IllegalArgumentException e) {}
8a57ebfdfd78 add JavaLib
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diff changeset
373 }
130
0594c132888b cleanup
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diff changeset
374 throw luan.exception("no method matched args");
37
8a57ebfdfd78 add JavaLib
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diff changeset
375 }
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diff changeset
376 }
8a57ebfdfd78 add JavaLib
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parents:
diff changeset
377
8a57ebfdfd78 add JavaLib
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parents:
diff changeset
378 private static class InstanceOf {
8a57ebfdfd78 add JavaLib
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parents:
diff changeset
379 private final Object obj;
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diff changeset
380
8a57ebfdfd78 add JavaLib
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parents:
diff changeset
381 InstanceOf(Object obj) {
8a57ebfdfd78 add JavaLib
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parents:
diff changeset
382 this.obj = obj;
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diff changeset
383 }
8a57ebfdfd78 add JavaLib
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parents:
diff changeset
384
8a57ebfdfd78 add JavaLib
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parents:
diff changeset
385 public boolean instanceOf(Static st) {
8a57ebfdfd78 add JavaLib
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff changeset
386 return st.cls.isInstance(obj);
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diff changeset
387 }
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diff changeset
388 }
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parents:
diff changeset
389 private static final Method instanceOf;
8a57ebfdfd78 add JavaLib
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parents:
diff changeset
390 static {
8a57ebfdfd78 add JavaLib
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parents:
diff changeset
391 try {
8a57ebfdfd78 add JavaLib
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parents:
diff changeset
392 instanceOf = InstanceOf.class.getMethod("instanceOf",Static.class);
8a57ebfdfd78 add JavaLib
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parents:
diff changeset
393 instanceOf.setAccessible(true);
8a57ebfdfd78 add JavaLib
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parents:
diff changeset
394 } catch(NoSuchMethodException e) {
8a57ebfdfd78 add JavaLib
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parents:
diff changeset
395 throw new RuntimeException(e);
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diff changeset
396 }
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diff changeset
397 }
8a57ebfdfd78 add JavaLib
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parents:
diff changeset
398
304
03e9cda4748d add JavaLuan.Static.luan_proxy()
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parents: 301
diff changeset
399 /*
64
177cfdc2bdb3 add type assertions
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parents: 63
diff changeset
400 private static class AssertClass {
177cfdc2bdb3 add type assertions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 63
diff changeset
401 private final Class cls;
177cfdc2bdb3 add type assertions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 63
diff changeset
402
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403 AssertClass(Class cls) {
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404 this.cls = cls;
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405 }
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406
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407 public Object assertClass(LuanState luan,Object v) throws LuanException {
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408 if( !cls.isInstance(v) ) {
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409 String got = v.getClass().getSimpleName();
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410 String expected = cls.getSimpleName();
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411 throw luan.exception("bad argument #1 ("+expected+" expected, got "+got+")");
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412 }
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413 return v;
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414 }
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415 }
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416 private static final Method assertClass;
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417 static {
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418 try {
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419 assertClass = AssertClass.class.getMethod("assertClass",LuanState.class,Object.class);
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420 assertClass.setAccessible(true);
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421 } catch(NoSuchMethodException e) {
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422 throw new RuntimeException(e);
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423 }
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424 }
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425
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426
62
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427 public static Object proxy(final LuanState luan,Static st,final LuanTable t,final Object base) throws LuanException {
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428 return Proxy.newProxyInstance(
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429 st.cls.getClassLoader(),
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430 new Class[]{st.cls},
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431 new InvocationHandler() {
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432 public Object invoke(Object proxy,Method method, Object[] args)
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433 throws Throwable
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434 {
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435 if( args==null )
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436 args = new Object[0];
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437 String name = method.getName();
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438 Object fnObj = t.get(name);
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439 if( fnObj==null && base!=null )
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440 return method.invoke(base,args);
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441 LuanFunction fn = luan.checkFunction(fnObj);
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442 return Luan.first(luan.call(fn,name,args));
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443 }
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444 }
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445 );
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446 }
304
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447 */
301
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448
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449
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450
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451 // security
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452
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453 public interface Security {
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454 public void check(LuanState luan,String name) throws LuanException;
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455 }
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456
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457 private static String SECURITY_KEY = "Java.Security";
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458
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459 private static void check(LuanState luan,String name) throws LuanException {
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460 Security s = (Security)luan.registry().get(SECURITY_KEY);
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461 if( s!=null )
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462 s.check(luan,name);
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463 }
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464
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465 public static void setSecurity(LuanState luan,Security s) {
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466 luan.registry().put(SECURITY_KEY,s);
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467 }
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468
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469 }