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annotate core/src/luan/modules/JavaLuan.java @ 575:7c3ad6db8ac3

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make LuanState.JAVA private
author Franklin Schmidt <fschmidt@gmail.com>
date Mon, 13 Jul 2015 18:34:31 -0600
parents 6cc2f047019b
children 4723d22062ce
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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diff changeset
1 package luan.modules;
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2
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3 import java.lang.reflect.Array;
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4 import java.lang.reflect.AccessibleObject;
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5 import java.lang.reflect.Member;
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6 import java.lang.reflect.Field;
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7 import java.lang.reflect.Method;
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8 import java.lang.reflect.Constructor;
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9 import java.lang.reflect.Modifier;
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10 import java.lang.reflect.InvocationHandler;
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11 import java.lang.reflect.Proxy;
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12 import java.util.Map;
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13 import java.util.HashMap;
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14 import java.util.List;
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15 import java.util.ArrayList;
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16 import java.util.Iterator;
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17 import java.util.Collections;
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18 import java.util.Arrays;
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19 import 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;
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26 import luan.LuanBit;
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27
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28
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29 public final class JavaLuan {
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30
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31 public static void java(LuanState luan) throws LuanException {
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32 check(luan,luan.currentSource().name);
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33 luan.setJava();
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34 }
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35
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36 public static final LuanFunction javaFn;
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37 static {
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38 try {
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39 javaFn = new LuanJavaFunction(JavaLuan.class.getMethod("java",LuanState.class),null);
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40 } catch(NoSuchMethodException e) {
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41 throw new RuntimeException(e);
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42 }
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43 }
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44
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45 private static void checkJava(LuanState luan) throws LuanException {
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46 if( !luan.hasJava() )
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47 throw luan.exception("Java isn't allowed");
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48 }
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49
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50 static final Object FAIL = new Object();
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51
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52 public static Object __index(LuanState luan,Object obj,Object key,boolean canReturnFail) throws LuanException {
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53 checkJava(luan);
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54 Class cls;
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55 if( obj instanceof Static ) {
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56 Static st = (Static)obj;
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57 cls = st.cls;
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58 if( key instanceof String ) {
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59 String name = (String)key;
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60 if( "class".equals(name) ) {
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61 return cls;
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62 } else if( "new".equals(name) ) {
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63 Constructor[] constructors = cls.getConstructors();
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64 if( constructors.length > 0 ) {
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65 if( constructors.length==1 ) {
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66 return new LuanJavaFunction(constructors[0],null);
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67 } else {
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68 List<LuanJavaFunction> fns = new ArrayList<LuanJavaFunction>();
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69 for( Constructor constructor : constructors ) {
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70 fns.add(new LuanJavaFunction(constructor,null));
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71 }
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72 return new AmbiguousJavaFunction(fns);
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73 }
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74 }
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75 /*
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76 } else if( "assert".equals(name) ) {
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77 return new LuanJavaFunction(assertClass,new AssertClass(cls));
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78 */
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79 } else if( "luan_proxy".equals(name) ) {
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80 return new LuanJavaFunction(luan_proxyMethod,st);
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81 } else {
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82 List<Member> members = getStaticMembers(cls,name);
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83 if( !members.isEmpty() ) {
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84 return member(null,members);
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85 }
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86 }
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87 }
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88 } else {
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89 cls = obj.getClass();
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90 if( cls.isArray() ) {
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91 if( "length".equals(key) ) {
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92 return Array.getLength(obj);
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93 }
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94 Integer i = Luan.asInteger(key);
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95 if( i != null ) {
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96 return Array.get(obj,i);
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97 }
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98 // throw luan.exception("invalid member '"+key+"' for java array: "+obj);
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99 } else if( key instanceof String ) {
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100 String name = (String)key;
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101 if( "instanceof".equals(name) ) {
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102 return new LuanJavaFunction(instanceOf,new InstanceOf(obj));
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103 } else {
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104 List<Member> members = getMembers(cls,name);
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105 if( !members.isEmpty() ) {
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106 return member(obj,members);
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107 }
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108 }
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109 }
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110 }
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111 //System.out.println("invalid member '"+key+"' for java object: "+obj);
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112 if( canReturnFail )
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113 return FAIL;
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114 throw luan.exception( "invalid index for java "+cls+" in '"+luan.context()+"'" );
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115 }
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116
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117 private static Object member(Object obj,List<Member> members) throws LuanException {
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118 try {
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119 if( members.size()==1 ) {
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120 Member member = members.get(0);
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121 if( member instanceof Static ) {
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122 return member;
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123 } else if( member instanceof Field ) {
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124 Field field = (Field)member;
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125 Object rtn = field.get(obj);
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126 return rtn instanceof Object[] ? Arrays.asList((Object[])rtn) : rtn;
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127 } else {
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128 Method method = (Method)member;
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129 return new LuanJavaFunction(method,obj);
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130 }
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131 } else {
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132 List<LuanJavaFunction> fns = new ArrayList<LuanJavaFunction>();
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133 for( Member member : members ) {
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134 Method method = (Method)member;
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135 fns.add(new LuanJavaFunction(method,obj));
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136 }
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137 return new AmbiguousJavaFunction(fns);
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138 }
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139 } catch(IllegalAccessException e) {
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140 throw new RuntimeException(e);
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141 }
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142 }
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143
511
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144 public static void __new_index(LuanBit bit,Object obj,Object key,Object value) throws LuanException {
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145 LuanState luan = bit.luan;
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146 checkJava(luan);
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147 Class cls;
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148 if( obj instanceof Static ) {
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149 Static st = (Static)obj;
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150 cls = st.cls;
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151 if( key instanceof String ) {
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152 String name = (String)key;
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153 List<Member> members = getStaticMembers(cls,name);
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154 if( !members.isEmpty() ) {
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155 if( members.size() != 1 )
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156 throw new RuntimeException("not field '"+name+"' of "+obj);
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157 setMember(obj,members,value);
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158 return;
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159 }
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160 }
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161 // throw luan.exception("invalid member '"+key+"' for: "+obj);
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162 } else {
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163 cls = obj.getClass();
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164 if( cls.isArray() ) {
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165 Integer i = Luan.asInteger(key);
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166 if( i != null ) {
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167 Array.set(obj,i,value);
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168 return;
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169 }
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170 // throw luan.exception("invalid member '"+key+"' for java array: "+obj);
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171 } else if( key instanceof String ) {
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172 String name = (String)key;
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173 List<Member> members = getMembers(cls,name);
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174 if( !members.isEmpty() ) {
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175 if( members.size() != 1 )
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176 throw new RuntimeException("not field '"+name+"' of "+obj);
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177 setMember(obj,members,value);
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178 return;
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179 }
60
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180 }
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181 }
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182 if( bit.el != null )
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183 throw bit.exception( "invalid index for java "+cls+" in '"+bit.el.text()+"'" );
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184 else
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185 throw bit.exception( "invalid index for java "+cls );
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186 }
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187
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188 private static void setMember(Object obj,List<Member> members,Object value) {
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189 Field field = (Field)members.get(0);
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190 try {
100
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191 try {
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192 field.set(obj,value);
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193 } catch(IllegalArgumentException e) {
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194 Class cls = field.getType();
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195 if( value instanceof Number ) {
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196 Number n = (Number)value;
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197 if( cls.equals(Integer.TYPE) || cls.equals(Integer.class) ) {
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198 int r = n.intValue();
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199 if( r==n.doubleValue() ) {
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200 field.setInt(obj,r);
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201 return;
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202 }
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203 }
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204 }
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205 throw e;
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206 }
60
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207 } catch(IllegalAccessException e) {
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208 throw new RuntimeException(e);
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209 }
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210 }
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211
102
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212 public static boolean privateAccess = false;
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213 private static Map<Class,Map<String,List<Member>>> memberMap = new HashMap<Class,Map<String,List<Member>>>();
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214
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215 private static synchronized List<Member> getMembers(Class cls,String name) {
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216 Map<String,List<Member>> clsMap = memberMap.get(cls);
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217 if( clsMap == null ) {
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218 clsMap = new HashMap<String,List<Member>>();
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219 for( Class c : cls.getClasses() ) {
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220 String s = c.getSimpleName();
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221 List<Member> list = new ArrayList<Member>();
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222 clsMap.put(s,list);
56
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223 list.add(new Static(c));
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224 }
37
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225 for( Field field : cls.getFields() ) {
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226 String s = field.getName();
58
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227 try {
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228 if( !cls.getField(s).equals(field) )
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229 continue; // not accessible
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230 } catch(NoSuchFieldException e) {
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231 throw new RuntimeException(e);
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232 }
71
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233 List<Member> list = new ArrayList<Member>();
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234 clsMap.put(s,list);
37
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235 list.add(field);
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236 }
71
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237 for( Method method : cls.getMethods() ) {
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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 || !(list.get(0) instanceof Method) ) {
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241 list = new ArrayList<Member>();
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242 clsMap.put(s,list);
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243 }
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244 list.add(method);
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245 }
102
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246 if( privateAccess ) {
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247 for( Method method : cls.getDeclaredMethods() ) {
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248 String s = method.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 } else if( !(list.get(0) instanceof Method) )
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254 continue;
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255 if( !list.contains(method) ) {
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256 list.add(method);
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257 }
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258 }
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259 for( Field field : cls.getDeclaredFields() ) {
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260 String s = field.getName();
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261 List<Member> list = clsMap.get(s);
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262 if( list == null ) {
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263 list = new ArrayList<Member>();
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264 clsMap.put(s,list);
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265 list.add(field);
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266 }
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267 }
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268 }
71
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269 for( List<Member> members : clsMap.values() ) {
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270 for( Member m : members ) {
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271 if( m instanceof AccessibleObject )
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272 ((AccessibleObject)m).setAccessible(true);
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273 }
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274 }
37
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275 memberMap.put(cls,clsMap);
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276 }
56
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277 List<Member> rtn = clsMap.get(name);
55
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diff changeset
278 if( rtn==null )
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279 rtn = Collections.emptyList();
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280 return rtn;
37
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281 }
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282
56
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diff changeset
283 private static synchronized List<Member> getStaticMembers(Class cls,String name) {
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284 List<Member> staticMembers = new ArrayList<Member>();
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285 for( Member m : getMembers(cls,name) ) {
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286 if( Modifier.isStatic(m.getModifiers()) )
37
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287 staticMembers.add(m);
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288 }
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289 return staticMembers;
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290 }
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291
56
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diff changeset
292 static final class Static implements Member {
37
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293 final Class cls;
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294
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diff changeset
295 Static(Class cls) {
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296 this.cls = cls;
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297 }
56
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298
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diff changeset
299 @Override public String toString() {
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diff changeset
300 return cls.toString();
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301 }
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302
437
Franklin Schmidt <fschmidt@gmail.com>
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diff changeset
303 @Override public Class getDeclaringClass() {
56
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304 return cls.getDeclaringClass();
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diff changeset
305 }
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diff changeset
306
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diff changeset
307 @Override public String getName() {
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diff changeset
308 return cls.getName();
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diff changeset
309 }
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diff changeset
310
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diff changeset
311 @Override public int getModifiers() {
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diff changeset
312 return cls.getModifiers();
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diff changeset
313 }
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diff changeset
314
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diff changeset
315 @Override public boolean isSynthetic() {
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diff changeset
316 return cls.isSynthetic();
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diff changeset
317 }
304
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diff changeset
318
502
d3183a330ff5 improve the __index metamethod to work with any type;
Franklin Schmidt <fschmidt@gmail.com>
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diff changeset
319 public Object luan_proxy(final LuanState luan,final LuanTable t) throws LuanException {
304
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parents: 301
diff changeset
320 return Proxy.newProxyInstance(
03e9cda4748d add JavaLuan.Static.luan_proxy()
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 301
diff changeset
321 cls.getClassLoader(),
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parents: 301
diff changeset
322 new Class[]{cls},
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 301
diff changeset
323 new InvocationHandler() {
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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diff changeset
324 public Object invoke(Object proxy,Method method, Object[] args)
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parents: 301
diff changeset
325 throws Throwable
03e9cda4748d add JavaLuan.Static.luan_proxy()
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diff changeset
326 {
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diff changeset
327 if( args==null )
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diff changeset
328 args = new Object[0];
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diff changeset
329 String name = method.getName();
575
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330 Object fnObj = t.get(luan,name);
502
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331 if( fnObj == null )
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332 throw new NullPointerException("luan_proxy couldn't find method '"+name+"'");
304
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diff changeset
333 LuanFunction fn = luan.checkFunction(fnObj);
574
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334 return Luan.first(fn.call(luan,args));
304
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diff changeset
335 }
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diff changeset
336 }
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diff changeset
337 );
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338 }
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339 }
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340 private static final Method luan_proxyMethod;
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341 static {
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342 try {
502
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343 luan_proxyMethod = Static.class.getMethod("luan_proxy",LuanState.class,LuanTable.class);
304
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344 luan_proxyMethod.setAccessible(true);
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diff changeset
345 } catch(NoSuchMethodException e) {
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346 throw new RuntimeException(e);
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347 }
37
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348 }
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349
299
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diff changeset
350 public static Static load(LuanState luan,String name) throws LuanException {
300
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diff changeset
351 checkJava(luan);
51
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diff changeset
352 Class cls;
37
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353 try {
51
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354 cls = Class.forName(name);
37
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355 } catch(ClassNotFoundException e) {
51
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diff changeset
356 try {
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357 cls = Thread.currentThread().getContextClassLoader().loadClass(name);
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diff changeset
358 } catch(ClassNotFoundException e2) {
108
3c404a296995 make Package module more standard;
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diff changeset
359 return null;
51
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diff changeset
360 }
37
8a57ebfdfd78 add JavaLib
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361 }
51
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diff changeset
362 return new Static(cls);
37
8a57ebfdfd78 add JavaLib
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363 }
300
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diff changeset
364
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diff changeset
365 private static class AmbiguousJavaFunction extends LuanFunction {
48
64ecb7a3aad7 rename Lua to Luan
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diff changeset
366 private final Map<Integer,List<LuanJavaFunction>> fnMap = new HashMap<Integer,List<LuanJavaFunction>>();
37
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diff changeset
367
48
64ecb7a3aad7 rename Lua to Luan
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diff changeset
368 AmbiguousJavaFunction(List<LuanJavaFunction> fns) {
64ecb7a3aad7 rename Lua to Luan
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diff changeset
369 for( LuanJavaFunction fn : fns ) {
37
8a57ebfdfd78 add JavaLib
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diff changeset
370 Integer n = fn.getParameterTypes().length;
48
64ecb7a3aad7 rename Lua to Luan
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diff changeset
371 List<LuanJavaFunction> list = fnMap.get(n);
37
8a57ebfdfd78 add JavaLib
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diff changeset
372 if( list==null ) {
48
64ecb7a3aad7 rename Lua to Luan
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diff changeset
373 list = new ArrayList<LuanJavaFunction>();
37
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diff changeset
374 fnMap.put(n,list);
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diff changeset
375 }
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diff changeset
376 list.add(fn);
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diff changeset
377 }
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diff changeset
378 }
8a57ebfdfd78 add JavaLib
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diff changeset
379
112
f5af13062b10 fix previous rev
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parents: 108
diff changeset
380 @Override public Object call(LuanState luan,Object[] args) throws LuanException {
48
64ecb7a3aad7 rename Lua to Luan
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diff changeset
381 for( LuanJavaFunction fn : fnMap.get(args.length) ) {
37
8a57ebfdfd78 add JavaLib
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diff changeset
382 try {
55
9381b23ea9e1 various fixes
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parents: 51
diff changeset
383 return fn.rawCall(luan,args);
37
8a57ebfdfd78 add JavaLib
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diff changeset
384 } catch(IllegalArgumentException e) {}
8a57ebfdfd78 add JavaLib
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diff changeset
385 }
402
62b457c50594 add stripe;
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diff changeset
386 throw luan.exception("no method matched args: "+Arrays.asList(args));
37
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diff changeset
387 }
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diff changeset
388 }
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diff changeset
389
8a57ebfdfd78 add JavaLib
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parents:
diff changeset
390 private static class InstanceOf {
8a57ebfdfd78 add JavaLib
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parents:
diff changeset
391 private final Object obj;
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diff changeset
392
8a57ebfdfd78 add JavaLib
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parents:
diff changeset
393 InstanceOf(Object obj) {
8a57ebfdfd78 add JavaLib
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parents:
diff changeset
394 this.obj = obj;
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diff changeset
395 }
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parents:
diff changeset
396
8a57ebfdfd78 add JavaLib
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parents:
diff changeset
397 public boolean instanceOf(Static st) {
8a57ebfdfd78 add JavaLib
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diff changeset
398 return st.cls.isInstance(obj);
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parents:
diff changeset
399 }
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parents:
diff changeset
400 }
8a57ebfdfd78 add JavaLib
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parents:
diff changeset
401 private static final Method instanceOf;
8a57ebfdfd78 add JavaLib
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff changeset
402 static {
8a57ebfdfd78 add JavaLib
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parents:
diff changeset
403 try {
8a57ebfdfd78 add JavaLib
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff changeset
404 instanceOf = InstanceOf.class.getMethod("instanceOf",Static.class);
8a57ebfdfd78 add JavaLib
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parents:
diff changeset
405 instanceOf.setAccessible(true);
8a57ebfdfd78 add JavaLib
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff changeset
406 } catch(NoSuchMethodException e) {
8a57ebfdfd78 add JavaLib
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
diff changeset
407 throw new RuntimeException(e);
8a57ebfdfd78 add JavaLib
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parents:
diff changeset
408 }
8a57ebfdfd78 add JavaLib
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parents:
diff changeset
409 }
8a57ebfdfd78 add JavaLib
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parents:
diff changeset
410
304
03e9cda4748d add JavaLuan.Static.luan_proxy()
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parents: 301
diff changeset
411 /*
64
177cfdc2bdb3 add type assertions
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parents: 63
diff changeset
412 private static class AssertClass {
177cfdc2bdb3 add type assertions
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parents: 63
diff changeset
413 private final Class cls;
177cfdc2bdb3 add type assertions
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parents: 63
diff changeset
414
177cfdc2bdb3 add type assertions
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parents: 63
diff changeset
415 AssertClass(Class cls) {
177cfdc2bdb3 add type assertions
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parents: 63
diff changeset
416 this.cls = cls;
177cfdc2bdb3 add type assertions
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parents: 63
diff changeset
417 }
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parents: 63
diff changeset
418
177cfdc2bdb3 add type assertions
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diff changeset
419 public Object assertClass(LuanState luan,Object v) throws LuanException {
177cfdc2bdb3 add type assertions
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parents: 63
diff changeset
420 if( !cls.isInstance(v) ) {
177cfdc2bdb3 add type assertions
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 63
diff changeset
421 String got = v.getClass().getSimpleName();
177cfdc2bdb3 add type assertions
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diff changeset
422 String expected = cls.getSimpleName();
130
0594c132888b cleanup
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parents: 124
diff changeset
423 throw luan.exception("bad argument #1 ("+expected+" expected, got "+got+")");
64
177cfdc2bdb3 add type assertions
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parents: 63
diff changeset
424 }
177cfdc2bdb3 add type assertions
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parents: 63
diff changeset
425 return v;
177cfdc2bdb3 add type assertions
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parents: 63
diff changeset
426 }
177cfdc2bdb3 add type assertions
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parents: 63
diff changeset
427 }
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parents: 63
diff changeset
428 private static final Method assertClass;
177cfdc2bdb3 add type assertions
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parents: 63
diff changeset
429 static {
177cfdc2bdb3 add type assertions
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parents: 63
diff changeset
430 try {
177cfdc2bdb3 add type assertions
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parents: 63
diff changeset
431 assertClass = AssertClass.class.getMethod("assertClass",LuanState.class,Object.class);
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432 assertClass.setAccessible(true);
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433 } catch(NoSuchMethodException e) {
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434 throw new RuntimeException(e);
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435 }
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436 }
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437
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438
62
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439 public static Object proxy(final LuanState luan,Static st,final LuanTable t,final Object base) throws LuanException {
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440 return Proxy.newProxyInstance(
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441 st.cls.getClassLoader(),
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442 new Class[]{st.cls},
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443 new InvocationHandler() {
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444 public Object invoke(Object proxy,Method method, Object[] args)
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445 throws Throwable
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446 {
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447 if( args==null )
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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448 args = new Object[0];
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449 String name = method.getName();
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450 Object fnObj = t.get(name);
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451 if( fnObj==null && base!=null )
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452 return method.invoke(base,args);
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453 LuanFunction fn = luan.checkFunction(fnObj);
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454 return Luan.first(luan.call(fn,name,args));
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455 }
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456 }
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457 );
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458 }
304
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459 */
301
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460
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461
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462
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463 // security
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464
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465 public interface Security {
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466 public void check(LuanState luan,String name) throws LuanException;
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467 }
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468
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469 private static String SECURITY_KEY = "Java.Security";
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470
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471 private static void check(LuanState luan,String name) throws LuanException {
433
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472 Security s = (Security)luan.registry().get(SECURITY_KEY);
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473 if( s!=null )
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474 s.check(luan,name);
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475 }
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476
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477 public static void setSecurity(LuanState luan,Security s) {
433
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478 luan.registry().put(SECURITY_KEY,s);
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479 }
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480
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481 }