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annotate core/src/luan/modules/JavaLuan.java @ 197:4c96cb73dd93

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fix metatable cloning git-svn-id: https://luan-java.googlecode.com/svn/trunk@198 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Thu, 03 Jul 2014 18:36:46 +0000
parents be0275bda373
children 75750ceb45ee
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
167
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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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1de3e4a6e82d remove LuanJavaFunction.RTN_NUMBER_ARRAY;
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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.MetatableGetter;
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23 import luan.LuanException;
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24 import luan.LuanFunction;
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25 import luan.LuanJavaFunction;
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26 import luan.LuanElement;
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27 import luan.DeepCloner;
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28
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29
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30 public final class JavaLuan {
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31
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32 public static final LuanFunction LOADER = new LuanFunction() {
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33 @Override public Object call(LuanState luan,Object[] args) {
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34 LuanTable module = new LuanTable();
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35 MyMetatableGetter mmg = new MyMetatableGetter();
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36 mmg.init();
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37 module.put( MetatableGetter.KEY, mmg );
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38 try {
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39 module.put( "class", new LuanJavaFunction(JavaLuan.class.getMethod("getClass",LuanState.class,String.class),null) );
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40 add( module, "proxy", LuanState.class, Static.class, LuanTable.class, Object.class );
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41 } catch(NoSuchMethodException e) {
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42 throw new RuntimeException(e);
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43 }
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44 luan.searchers().add(javaSearcher);
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45 return module;
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46 }
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47 };
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48
108
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49 public static final LuanFunction javaSearcher = new LuanFunction() {
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50 @Override public Object call(LuanState luan,Object[] args) throws LuanException {
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51 String modName = (String)args[0];
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52 final Static s = JavaLuan.getClass(luan,modName);
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53 if( s==null )
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54 return null;
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55 LuanFunction loader = new LuanFunction() {
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56 @Override public Object call(LuanState luan,Object[] args) {
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57 return s;
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58 }
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59 };
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60 return loader;
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61 }
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62 };
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63
48
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64 private static void add(LuanTable t,String method,Class<?>... parameterTypes) {
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65 try {
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66 t.put( method, new LuanJavaFunction(JavaLuan.class.getMethod(method,parameterTypes),null) );
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67 } catch(NoSuchMethodException e) {
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68 throw new RuntimeException(e);
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69 }
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70 }
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71
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72 public static class MyMetatableGetter implements MetatableGetter {
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73 private LuanTable metatable;
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74
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75 private MyMetatableGetter() {}
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76
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77 private void init() {
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78 this.metatable = new LuanTable();
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79 try {
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80 metatable.put( "__index", new LuanJavaFunction(
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81 MyMetatableGetter.class.getMethod( "__index", LuanState.class, Object.class, Object.class ), this
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82 ) );
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83 } catch(NoSuchMethodException e) {
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84 throw new RuntimeException(e);
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85 }
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86 add( metatable, "__newindex", LuanState.class, Object.class, Object.class, Object.class );
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87 }
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88
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89 @Override public MetatableGetter shallowClone() {
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90 return new MyMetatableGetter();
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91 }
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92
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93 @Override public void deepenClone(MetatableGetter c,DeepCloner cloner) {
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94 MyMetatableGetter clone = (MyMetatableGetter)c;
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95 clone.metatable = cloner.deepClone(metatable);
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96 }
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97
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98 @Override public LuanTable getMetatable(Object obj) {
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99 if( obj==null )
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100 return null;
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101 return metatable;
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102 }
37
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103
197
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104 public Object __index(LuanState luan,Object obj,Object key) throws LuanException {
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105 LuanTable mt = luan.getMetatable(obj,this);
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106 if( mt != null ) {
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107 Object h = mt.get("__index");
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108 if( h instanceof LuanFunction ) {
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109 LuanFunction fn = (LuanFunction)h;
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110 Object rtn = Luan.first(luan.call(fn,new Object[]{obj,key}));
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111 if( rtn != null )
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112 return rtn;
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113 }
195
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114 }
197
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115 if( obj instanceof Static ) {
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116 if( key instanceof String ) {
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117 String name = (String)key;
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118 Static st = (Static)obj;
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119 Class cls = st.cls;
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120 if( "class".equals(name) ) {
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121 return cls;
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122 } else if( "new".equals(name) ) {
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123 Constructor<?>[] constructors = cls.getConstructors();
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124 if( constructors.length > 0 ) {
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125 if( constructors.length==1 ) {
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126 return new LuanJavaFunction(constructors[0],null);
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127 } else {
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128 List<LuanJavaFunction> fns = new ArrayList<LuanJavaFunction>();
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129 for( Constructor constructor : constructors ) {
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130 fns.add(new LuanJavaFunction(constructor,null));
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131 }
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132 return new AmbiguousJavaFunction(fns);
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133 }
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134 }
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135 } else if( "assert".equals(name) ) {
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136 return new LuanJavaFunction(assertClass,new AssertClass(cls));
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137 } else {
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138 List<Member> members = getStaticMembers(cls,name);
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139 if( !members.isEmpty() ) {
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140 return member(null,members);
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141 }
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142 }
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143 }
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144 throw luan.exception("invalid member '"+key+"' for: "+obj);
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145 }
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146 Class cls = obj.getClass();
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147 if( cls.isArray() ) {
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148 if( "length".equals(key) ) {
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149 return Array.getLength(obj);
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150 }
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151 Integer i = Luan.asInteger(key);
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152 if( i != null ) {
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153 return Array.get(obj,i);
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154 }
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155 throw luan.exception("invalid member '"+key+"' for java array: "+obj);
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156 }
37
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157 if( key instanceof String ) {
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158 String name = (String)key;
197
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159 if( "instanceof".equals(name) ) {
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160 return new LuanJavaFunction(instanceOf,new InstanceOf(obj));
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161 } else {
197
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162 List<Member> members = getMembers(cls,name);
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163 if( !members.isEmpty() ) {
197
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164 return member(obj,members);
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165 }
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166 }
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167 }
197
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168 return null;
37
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169 }
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170 }
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171
56
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172 private static Object member(Object obj,List<Member> members) throws LuanException {
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173 try {
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174 if( members.size()==1 ) {
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175 Member member = members.get(0);
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176 if( member instanceof Static ) {
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177 return member;
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178 } else if( member instanceof Field ) {
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179 Field field = (Field)member;
157
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180 Object rtn = field.get(obj);
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181 return rtn instanceof Object[] ? Arrays.asList((Object[])rtn) : rtn;
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182 } else {
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183 Method method = (Method)member;
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184 return new LuanJavaFunction(method,obj);
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185 }
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186 } else {
48
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187 List<LuanJavaFunction> fns = new ArrayList<LuanJavaFunction>();
56
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188 for( Member member : members ) {
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189 Method method = (Method)member;
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190 fns.add(new LuanJavaFunction(method,obj));
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191 }
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192 return new AmbiguousJavaFunction(fns);
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193 }
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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
60
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199 public static void __newindex(LuanState luan,Object obj,Object key,Object value) throws LuanException {
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200 if( obj instanceof Static ) {
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diff changeset
201 if( key instanceof String ) {
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202 String name = (String)key;
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203 Static st = (Static)obj;
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204 Class cls = st.cls;
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205 List<Member> members = getStaticMembers(cls,name);
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206 if( !members.isEmpty() ) {
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207 if( members.size() != 1 )
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208 throw new RuntimeException("not field '"+name+"' of "+obj);
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209 setMember(obj,members,value);
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210 return;
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211 }
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212 }
130
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213 throw luan.exception("invalid member '"+key+"' for: "+obj);
60
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214 }
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215 Class cls = obj.getClass();
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216 if( cls.isArray() ) {
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217 Integer i = Luan.asInteger(key);
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218 if( i != null ) {
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219 Array.set(obj,i,value);
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220 return;
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221 }
130
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222 throw luan.exception("invalid member '"+key+"' for java array: "+obj);
60
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223 }
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224 if( key instanceof String ) {
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225 String name = (String)key;
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226 List<Member> members = getMembers(cls,name);
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227 if( !members.isEmpty() ) {
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228 if( members.size() != 1 )
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229 throw new RuntimeException("not field '"+name+"' of "+obj);
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230 setMember(obj,members,value);
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231 return;
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232 }
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233 }
130
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234 throw luan.exception("invalid member '"+key+"' for java object: "+obj);
60
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235 }
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236
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237 private static void setMember(Object obj,List<Member> members,Object value) {
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238 Field field = (Field)members.get(0);
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239 try {
100
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240 try {
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241 field.set(obj,value);
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242 } catch(IllegalArgumentException e) {
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243 Class cls = field.getType();
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244 if( value instanceof Number ) {
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245 Number n = (Number)value;
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246 if( cls.equals(Integer.TYPE) || cls.equals(Integer.class) ) {
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247 int r = n.intValue();
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248 if( r==n.doubleValue() ) {
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249 field.setInt(obj,r);
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250 return;
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251 }
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252 }
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253 }
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254 throw e;
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255 }
60
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256 } catch(IllegalAccessException e) {
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257 throw new RuntimeException(e);
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258 }
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259 }
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diff changeset
260
102
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diff changeset
261 public static boolean privateAccess = false;
56
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262 private static Map<Class,Map<String,List<Member>>> memberMap = new HashMap<Class,Map<String,List<Member>>>();
37
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263
56
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264 private static synchronized List<Member> getMembers(Class cls,String name) {
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265 Map<String,List<Member>> clsMap = memberMap.get(cls);
37
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266 if( clsMap == null ) {
56
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267 clsMap = new HashMap<String,List<Member>>();
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268 for( Class c : cls.getClasses() ) {
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269 String s = c.getSimpleName();
71
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270 List<Member> list = new ArrayList<Member>();
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271 clsMap.put(s,list);
56
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272 list.add(new Static(c));
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273 }
37
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274 for( Field field : cls.getFields() ) {
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275 String s = field.getName();
58
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276 try {
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diff changeset
277 if( !cls.getField(s).equals(field) )
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diff changeset
278 continue; // not accessible
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diff changeset
279 } catch(NoSuchFieldException e) {
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diff changeset
280 throw new RuntimeException(e);
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diff changeset
281 }
71
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diff changeset
282 List<Member> list = new ArrayList<Member>();
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diff changeset
283 clsMap.put(s,list);
37
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diff changeset
284 list.add(field);
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285 }
71
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diff changeset
286 for( Method method : cls.getMethods() ) {
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diff changeset
287 String s = method.getName();
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288 List<Member> list = clsMap.get(s);
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diff changeset
289 if( list == null || !(list.get(0) instanceof Method) ) {
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diff changeset
290 list = new ArrayList<Member>();
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diff changeset
291 clsMap.put(s,list);
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292 }
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diff changeset
293 list.add(method);
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294 }
102
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diff changeset
295 if( privateAccess ) {
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diff changeset
296 for( Method method : cls.getDeclaredMethods() ) {
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diff changeset
297 String s = method.getName();
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diff changeset
298 List<Member> list = clsMap.get(s);
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diff changeset
299 if( list == null ) {
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diff changeset
300 list = new ArrayList<Member>();
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diff changeset
301 clsMap.put(s,list);
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302 } else if( !(list.get(0) instanceof Method) )
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303 continue;
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304 if( !list.contains(method) ) {
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305 list.add(method);
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306 }
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307 }
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308 for( Field field : cls.getDeclaredFields() ) {
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309 String s = field.getName();
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310 List<Member> list = clsMap.get(s);
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311 if( list == null ) {
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312 list = new ArrayList<Member>();
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313 clsMap.put(s,list);
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314 list.add(field);
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315 }
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316 }
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317 }
71
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318 for( List<Member> members : clsMap.values() ) {
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319 for( Member m : members ) {
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320 if( m instanceof AccessibleObject )
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321 ((AccessibleObject)m).setAccessible(true);
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322 }
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323 }
37
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324 memberMap.put(cls,clsMap);
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325 }
56
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326 List<Member> rtn = clsMap.get(name);
55
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327 if( rtn==null )
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328 rtn = Collections.emptyList();
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329 return rtn;
37
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330 }
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331
56
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diff changeset
332 private static synchronized List<Member> getStaticMembers(Class cls,String name) {
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333 List<Member> staticMembers = new ArrayList<Member>();
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334 for( Member m : getMembers(cls,name) ) {
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335 if( Modifier.isStatic(m.getModifiers()) )
37
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336 staticMembers.add(m);
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337 }
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338 return staticMembers;
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339 }
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340
56
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diff changeset
341 static final class Static implements Member {
37
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342 final Class cls;
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343
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344 Static(Class cls) {
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345 this.cls = cls;
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346 }
56
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diff changeset
347
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diff changeset
348 @Override public String toString() {
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349 return cls.toString();
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350 }
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diff changeset
351
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diff changeset
352 @Override public Class<?> getDeclaringClass() {
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diff changeset
353 return cls.getDeclaringClass();
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diff changeset
354 }
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diff changeset
355
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diff changeset
356 @Override public String getName() {
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diff changeset
357 return cls.getName();
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diff changeset
358 }
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diff changeset
359
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diff changeset
360 @Override public int getModifiers() {
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diff changeset
361 return cls.getModifiers();
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diff changeset
362 }
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diff changeset
363
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parents: 55
diff changeset
364 @Override public boolean isSynthetic() {
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diff changeset
365 return cls.isSynthetic();
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diff changeset
366 }
37
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diff changeset
367 }
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diff changeset
368
49
8ede219cd111 add WebShell
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diff changeset
369 public static Static getClass(LuanState luan,String name) throws LuanException {
51
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diff changeset
370 Class cls;
37
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diff changeset
371 try {
51
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parents: 50
diff changeset
372 cls = Class.forName(name);
37
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diff changeset
373 } catch(ClassNotFoundException e) {
51
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diff changeset
374 try {
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diff changeset
375 cls = Thread.currentThread().getContextClassLoader().loadClass(name);
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diff changeset
376 } catch(ClassNotFoundException e2) {
108
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diff changeset
377 return null;
51
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diff changeset
378 }
37
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diff changeset
379 }
51
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diff changeset
380 return new Static(cls);
37
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381 }
108
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diff changeset
382 /*
49
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diff changeset
383 public static void importClass(LuanState luan,String name) throws LuanException {
86
6db8f286fa6c _ENV is per module, not global
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diff changeset
384 luan.currentEnvironment().put( name.substring(name.lastIndexOf('.')+1), getClass(luan,name) );
37
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385 }
108
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diff changeset
386 */
48
64ecb7a3aad7 rename Lua to Luan
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parents: 46
diff changeset
387 static class AmbiguousJavaFunction extends LuanFunction {
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diff changeset
388 private final Map<Integer,List<LuanJavaFunction>> fnMap = new HashMap<Integer,List<LuanJavaFunction>>();
37
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diff changeset
389
48
64ecb7a3aad7 rename Lua to Luan
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parents: 46
diff changeset
390 AmbiguousJavaFunction(List<LuanJavaFunction> fns) {
64ecb7a3aad7 rename Lua to Luan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 46
diff changeset
391 for( LuanJavaFunction fn : fns ) {
37
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diff changeset
392 Integer n = fn.getParameterTypes().length;
48
64ecb7a3aad7 rename Lua to Luan
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diff changeset
393 List<LuanJavaFunction> list = fnMap.get(n);
37
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diff changeset
394 if( list==null ) {
48
64ecb7a3aad7 rename Lua to Luan
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parents: 46
diff changeset
395 list = new ArrayList<LuanJavaFunction>();
37
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diff changeset
396 fnMap.put(n,list);
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diff changeset
397 }
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diff changeset
398 list.add(fn);
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diff changeset
399 }
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diff changeset
400 }
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diff changeset
401
112
f5af13062b10 fix previous rev
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parents: 108
diff changeset
402 @Override public Object call(LuanState luan,Object[] args) throws LuanException {
48
64ecb7a3aad7 rename Lua to Luan
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parents: 46
diff changeset
403 for( LuanJavaFunction fn : fnMap.get(args.length) ) {
37
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diff changeset
404 try {
55
9381b23ea9e1 various fixes
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 51
diff changeset
405 return fn.rawCall(luan,args);
37
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diff changeset
406 } catch(IllegalArgumentException e) {}
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diff changeset
407 }
130
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408 throw luan.exception("no method matched args");
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409 }
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410 }
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411
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412 private static class InstanceOf {
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413 private final Object obj;
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414
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415 InstanceOf(Object obj) {
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416 this.obj = obj;
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417 }
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418
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419 public boolean instanceOf(Static st) {
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420 return st.cls.isInstance(obj);
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421 }
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422 }
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423 private static final Method instanceOf;
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424 static {
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425 try {
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426 instanceOf = InstanceOf.class.getMethod("instanceOf",Static.class);
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427 instanceOf.setAccessible(true);
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428 } catch(NoSuchMethodException e) {
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429 throw new RuntimeException(e);
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430 }
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431 }
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432
61
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433
64
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434 private static class AssertClass {
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435 private final Class cls;
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436
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437 AssertClass(Class cls) {
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438 this.cls = cls;
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439 }
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440
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441 public Object assertClass(LuanState luan,Object v) throws LuanException {
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442 if( !cls.isInstance(v) ) {
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443 String got = v.getClass().getSimpleName();
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444 String expected = cls.getSimpleName();
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445 throw luan.exception("bad argument #1 ("+expected+" expected, got "+got+")");
64
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446 }
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447 return v;
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448 }
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449 }
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450 private static final Method assertClass;
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451 static {
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452 try {
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453 assertClass = AssertClass.class.getMethod("assertClass",LuanState.class,Object.class);
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454 assertClass.setAccessible(true);
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455 } catch(NoSuchMethodException e) {
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456 throw new RuntimeException(e);
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457 }
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458 }
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459
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diff changeset
460
62
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461 public static Object proxy(final LuanState luan,Static st,final LuanTable t,final Object base) throws LuanException {
61
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462 return Proxy.newProxyInstance(
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463 st.cls.getClassLoader(),
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464 new Class[]{st.cls},
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465 new InvocationHandler() {
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466 public Object invoke(Object proxy,Method method, Object[] args)
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467 throws Throwable
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468 {
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469 if( args==null )
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470 args = new Object[0];
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471 String name = method.getName();
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472 Object fnObj = t.get(name);
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473 if( fnObj==null && base!=null )
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474 return method.invoke(base,args);
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475 LuanFunction fn = luan.checkFunction(fnObj);
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476 return Luan.first(luan.call(fn,name,args));
61
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477 }
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478 }
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479 );
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480 }
37
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481 }