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annotate core/src/luan/modules/JavaLuan.java @ 202:75750ceb45ee

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add LuanState.registry git-svn-id: https://luan-java.googlecode.com/svn/trunk@203 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Fri, 04 Jul 2014 17:18:39 +0000
parents 4c96cb73dd93
children 5ba136769034
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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;
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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;
55
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17 import java.util.Collections;
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18 import java.util.Arrays;
48
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19 import luan.Luan;
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20 import luan.LuanState;
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21 import luan.LuanTable;
37
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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;
37
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28
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29
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30 public final class JavaLuan {
37
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31
108
3c404a296995 make Package module more standard;
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32 public static final LuanFunction LOADER = new LuanFunction() {
112
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33 @Override public Object call(LuanState luan,Object[] args) {
73
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34 LuanTable module = new LuanTable();
202
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35 module.put( MetatableGetter.KEY, new MyMetatableGetter() );
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36 try {
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37 module.put( "class", new LuanJavaFunction(JavaLuan.class.getMethod("getClass",LuanState.class,String.class),null) );
73
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38 add( module, "proxy", LuanState.class, Static.class, LuanTable.class, Object.class );
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39 } catch(NoSuchMethodException e) {
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40 throw new RuntimeException(e);
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41 }
112
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42 return module;
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43 }
73
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44 };
37
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45
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46 private static boolean isLoaded(LuanState luan) {
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47 return PackageLuan.loaded(luan).get("Java") != null;
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48 }
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49
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50 public static final LuanFunction javaSearcher = new LuanFunction() {
112
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51 @Override public Object call(LuanState luan,Object[] args) throws LuanException {
202
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52 if( !isLoaded(luan) )
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53 return LuanFunction.NOTHING;
108
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54 String modName = (String)args[0];
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55 final Static s = JavaLuan.getClass(luan,modName);
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56 if( s==null )
112
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57 return null;
108
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58 LuanFunction loader = new LuanFunction() {
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59 @Override public Object call(LuanState luan,Object[] args) {
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60 return s;
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61 }
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62 };
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63 return loader;
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64 }
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65 };
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66
48
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67 private static void add(LuanTable t,String method,Class<?>... parameterTypes) {
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68 try {
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69 t.put( method, new LuanJavaFunction(JavaLuan.class.getMethod(method,parameterTypes),null) );
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70 } catch(NoSuchMethodException e) {
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71 throw new RuntimeException(e);
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72 }
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73 }
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74
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75 public static class MyMetatableGetter implements MetatableGetter {
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76 private LuanTable metatable;
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77
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78 private MyMetatableGetter() {
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79 this.metatable = new LuanTable();
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80 try {
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81 metatable.put( "__index", new LuanJavaFunction(
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82 MyMetatableGetter.class.getMethod( "__index", LuanState.class, Object.class, Object.class ), this
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83 ) );
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84 } catch(NoSuchMethodException e) {
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85 throw new RuntimeException(e);
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86 }
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87 add( metatable, "__newindex", LuanState.class, Object.class, Object.class, Object.class );
37
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88 }
195
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89
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90 private MyMetatableGetter(MyMetatableGetter mmg) {}
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91
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92 @Override public MetatableGetter shallowClone() {
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93 return new MyMetatableGetter(this);
197
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94 }
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95
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96 @Override public void deepenClone(MetatableGetter c,DeepCloner cloner) {
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97 MyMetatableGetter clone = (MyMetatableGetter)c;
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98 clone.metatable = cloner.deepClone(metatable);
195
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99 }
197
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100
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101 @Override public LuanTable getMetatable(Object obj) {
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102 if( obj==null )
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103 return null;
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104 return metatable;
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105 }
37
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106
197
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107 public Object __index(LuanState luan,Object obj,Object key) throws LuanException {
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108 LuanTable mt = luan.getMetatable(obj,this);
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109 if( mt != null ) {
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110 Object h = mt.get("__index");
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111 if( h instanceof LuanFunction ) {
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112 LuanFunction fn = (LuanFunction)h;
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113 Object rtn = Luan.first(luan.call(fn,new Object[]{obj,key}));
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114 if( rtn != null )
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115 return rtn;
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116 }
195
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117 }
197
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118 if( obj instanceof Static ) {
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119 if( key instanceof String ) {
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120 String name = (String)key;
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121 Static st = (Static)obj;
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122 Class cls = st.cls;
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123 if( "class".equals(name) ) {
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124 return cls;
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125 } else if( "new".equals(name) ) {
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126 Constructor<?>[] constructors = cls.getConstructors();
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127 if( constructors.length > 0 ) {
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128 if( constructors.length==1 ) {
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129 return new LuanJavaFunction(constructors[0],null);
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130 } else {
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131 List<LuanJavaFunction> fns = new ArrayList<LuanJavaFunction>();
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132 for( Constructor constructor : constructors ) {
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133 fns.add(new LuanJavaFunction(constructor,null));
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134 }
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135 return new AmbiguousJavaFunction(fns);
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136 }
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137 }
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138 } else if( "assert".equals(name) ) {
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139 return new LuanJavaFunction(assertClass,new AssertClass(cls));
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140 } else {
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141 List<Member> members = getStaticMembers(cls,name);
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142 if( !members.isEmpty() ) {
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143 return member(null,members);
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144 }
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145 }
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146 }
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147 throw luan.exception("invalid member '"+key+"' for: "+obj);
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148 }
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149 Class cls = obj.getClass();
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150 if( cls.isArray() ) {
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151 if( "length".equals(key) ) {
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152 return Array.getLength(obj);
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153 }
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154 Integer i = Luan.asInteger(key);
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155 if( i != null ) {
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156 return Array.get(obj,i);
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157 }
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diff changeset
158 throw luan.exception("invalid member '"+key+"' for java array: "+obj);
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159 }
37
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160 if( key instanceof String ) {
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161 String name = (String)key;
197
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162 if( "instanceof".equals(name) ) {
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163 return new LuanJavaFunction(instanceOf,new InstanceOf(obj));
37
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164 } else {
197
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165 List<Member> members = getMembers(cls,name);
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166 if( !members.isEmpty() ) {
197
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167 return member(obj,members);
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168 }
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169 }
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170 }
197
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171 return null;
37
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172 }
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173 }
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174
56
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175 private static Object member(Object obj,List<Member> members) throws LuanException {
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176 try {
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177 if( members.size()==1 ) {
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178 Member member = members.get(0);
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179 if( member instanceof Static ) {
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180 return member;
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181 } else if( member instanceof Field ) {
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182 Field field = (Field)member;
157
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183 Object rtn = field.get(obj);
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184 return rtn instanceof Object[] ? Arrays.asList((Object[])rtn) : rtn;
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185 } else {
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186 Method method = (Method)member;
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187 return new LuanJavaFunction(method,obj);
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188 }
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189 } else {
48
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190 List<LuanJavaFunction> fns = new ArrayList<LuanJavaFunction>();
56
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191 for( Member member : members ) {
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192 Method method = (Method)member;
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193 fns.add(new LuanJavaFunction(method,obj));
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194 }
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195 return new AmbiguousJavaFunction(fns);
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196 }
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197 } catch(IllegalAccessException e) {
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198 throw new RuntimeException(e);
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199 }
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200 }
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201
60
a68ccb7aaa9c implement setting java field values
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diff changeset
202 public static void __newindex(LuanState luan,Object obj,Object key,Object value) throws LuanException {
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203 if( obj instanceof Static ) {
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204 if( key instanceof String ) {
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205 String name = (String)key;
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206 Static st = (Static)obj;
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207 Class cls = st.cls;
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208 List<Member> members = getStaticMembers(cls,name);
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209 if( !members.isEmpty() ) {
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210 if( members.size() != 1 )
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211 throw new RuntimeException("not field '"+name+"' of "+obj);
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212 setMember(obj,members,value);
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213 return;
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214 }
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215 }
130
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216 throw luan.exception("invalid member '"+key+"' for: "+obj);
60
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217 }
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218 Class cls = obj.getClass();
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219 if( cls.isArray() ) {
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220 Integer i = Luan.asInteger(key);
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221 if( i != null ) {
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222 Array.set(obj,i,value);
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223 return;
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224 }
130
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225 throw luan.exception("invalid member '"+key+"' for java array: "+obj);
60
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226 }
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227 if( key instanceof String ) {
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228 String name = (String)key;
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229 List<Member> members = getMembers(cls,name);
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230 if( !members.isEmpty() ) {
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231 if( members.size() != 1 )
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232 throw new RuntimeException("not field '"+name+"' of "+obj);
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233 setMember(obj,members,value);
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234 return;
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235 }
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236 }
130
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237 throw luan.exception("invalid member '"+key+"' for java object: "+obj);
60
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238 }
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239
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240 private static void setMember(Object obj,List<Member> members,Object value) {
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241 Field field = (Field)members.get(0);
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242 try {
100
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diff changeset
243 try {
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244 field.set(obj,value);
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245 } catch(IllegalArgumentException e) {
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246 Class cls = field.getType();
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247 if( value instanceof Number ) {
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248 Number n = (Number)value;
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249 if( cls.equals(Integer.TYPE) || cls.equals(Integer.class) ) {
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250 int r = n.intValue();
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251 if( r==n.doubleValue() ) {
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252 field.setInt(obj,r);
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253 return;
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254 }
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255 }
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256 }
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diff changeset
257 throw e;
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258 }
60
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259 } catch(IllegalAccessException e) {
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260 throw new RuntimeException(e);
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261 }
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262 }
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diff changeset
263
102
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diff changeset
264 public static boolean privateAccess = false;
56
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265 private static Map<Class,Map<String,List<Member>>> memberMap = new HashMap<Class,Map<String,List<Member>>>();
37
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266
56
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267 private static synchronized List<Member> getMembers(Class cls,String name) {
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268 Map<String,List<Member>> clsMap = memberMap.get(cls);
37
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269 if( clsMap == null ) {
56
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270 clsMap = new HashMap<String,List<Member>>();
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271 for( Class c : cls.getClasses() ) {
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272 String s = c.getSimpleName();
71
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diff changeset
273 List<Member> list = new ArrayList<Member>();
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274 clsMap.put(s,list);
56
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275 list.add(new Static(c));
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276 }
37
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277 for( Field field : cls.getFields() ) {
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278 String s = field.getName();
58
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diff changeset
279 try {
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diff changeset
280 if( !cls.getField(s).equals(field) )
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diff changeset
281 continue; // not accessible
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diff changeset
282 } catch(NoSuchFieldException e) {
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diff changeset
283 throw new RuntimeException(e);
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diff changeset
284 }
71
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diff changeset
285 List<Member> list = new ArrayList<Member>();
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diff changeset
286 clsMap.put(s,list);
37
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diff changeset
287 list.add(field);
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288 }
71
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diff changeset
289 for( Method method : cls.getMethods() ) {
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diff changeset
290 String s = method.getName();
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diff changeset
291 List<Member> list = clsMap.get(s);
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diff changeset
292 if( list == null || !(list.get(0) instanceof Method) ) {
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diff changeset
293 list = new ArrayList<Member>();
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diff changeset
294 clsMap.put(s,list);
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295 }
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diff changeset
296 list.add(method);
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diff changeset
297 }
102
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diff changeset
298 if( privateAccess ) {
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diff changeset
299 for( Method method : cls.getDeclaredMethods() ) {
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diff changeset
300 String s = method.getName();
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diff changeset
301 List<Member> list = clsMap.get(s);
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diff changeset
302 if( list == null ) {
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303 list = new ArrayList<Member>();
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304 clsMap.put(s,list);
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305 } else if( !(list.get(0) instanceof Method) )
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306 continue;
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307 if( !list.contains(method) ) {
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diff changeset
308 list.add(method);
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309 }
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310 }
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diff changeset
311 for( Field field : cls.getDeclaredFields() ) {
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312 String s = field.getName();
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313 List<Member> list = clsMap.get(s);
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314 if( list == null ) {
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315 list = new ArrayList<Member>();
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316 clsMap.put(s,list);
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317 list.add(field);
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318 }
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319 }
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320 }
71
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321 for( List<Member> members : clsMap.values() ) {
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322 for( Member m : members ) {
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diff changeset
323 if( m instanceof AccessibleObject )
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324 ((AccessibleObject)m).setAccessible(true);
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325 }
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326 }
37
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327 memberMap.put(cls,clsMap);
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328 }
56
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diff changeset
329 List<Member> rtn = clsMap.get(name);
55
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diff changeset
330 if( rtn==null )
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331 rtn = Collections.emptyList();
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diff changeset
332 return rtn;
37
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333 }
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334
56
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diff changeset
335 private static synchronized List<Member> getStaticMembers(Class cls,String name) {
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336 List<Member> staticMembers = new ArrayList<Member>();
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diff changeset
337 for( Member m : getMembers(cls,name) ) {
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diff changeset
338 if( Modifier.isStatic(m.getModifiers()) )
37
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diff changeset
339 staticMembers.add(m);
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340 }
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341 return staticMembers;
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342 }
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343
56
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diff changeset
344 static final class Static implements Member {
37
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diff changeset
345 final Class cls;
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346
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diff changeset
347 Static(Class cls) {
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diff changeset
348 this.cls = cls;
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349 }
56
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diff changeset
350
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diff changeset
351 @Override public String toString() {
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diff changeset
352 return cls.toString();
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diff changeset
353 }
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diff changeset
354
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diff changeset
355 @Override public Class<?> getDeclaringClass() {
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diff changeset
356 return cls.getDeclaringClass();
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diff changeset
357 }
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diff changeset
358
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diff changeset
359 @Override public String getName() {
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diff changeset
360 return cls.getName();
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diff changeset
361 }
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diff changeset
362
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diff changeset
363 @Override public int getModifiers() {
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diff changeset
364 return cls.getModifiers();
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parents: 55
diff changeset
365 }
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diff changeset
366
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parents: 55
diff changeset
367 @Override public boolean isSynthetic() {
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diff changeset
368 return cls.isSynthetic();
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diff changeset
369 }
37
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diff changeset
370 }
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diff changeset
371
49
8ede219cd111 add WebShell
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parents: 48
diff changeset
372 public static Static getClass(LuanState luan,String name) throws LuanException {
51
28dfd91a816c various small issues
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diff changeset
373 Class cls;
37
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diff changeset
374 try {
51
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parents: 50
diff changeset
375 cls = Class.forName(name);
37
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diff changeset
376 } catch(ClassNotFoundException e) {
51
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diff changeset
377 try {
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parents: 50
diff changeset
378 cls = Thread.currentThread().getContextClassLoader().loadClass(name);
28dfd91a816c various small issues
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 50
diff changeset
379 } catch(ClassNotFoundException e2) {
108
3c404a296995 make Package module more standard;
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diff changeset
380 return null;
51
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diff changeset
381 }
37
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diff changeset
382 }
51
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diff changeset
383 return new Static(cls);
37
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diff changeset
384 }
108
3c404a296995 make Package module more standard;
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diff changeset
385 /*
49
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diff changeset
386 public static void importClass(LuanState luan,String name) throws LuanException {
86
6db8f286fa6c _ENV is per module, not global
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diff changeset
387 luan.currentEnvironment().put( name.substring(name.lastIndexOf('.')+1), getClass(luan,name) );
37
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diff changeset
388 }
108
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parents: 102
diff changeset
389 */
48
64ecb7a3aad7 rename Lua to Luan
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parents: 46
diff changeset
390 static class AmbiguousJavaFunction extends LuanFunction {
64ecb7a3aad7 rename Lua to Luan
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parents: 46
diff changeset
391 private final Map<Integer,List<LuanJavaFunction>> fnMap = new HashMap<Integer,List<LuanJavaFunction>>();
37
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diff changeset
392
48
64ecb7a3aad7 rename Lua to Luan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 46
diff changeset
393 AmbiguousJavaFunction(List<LuanJavaFunction> fns) {
64ecb7a3aad7 rename Lua to Luan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 46
diff changeset
394 for( LuanJavaFunction fn : fns ) {
37
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parents:
diff changeset
395 Integer n = fn.getParameterTypes().length;
48
64ecb7a3aad7 rename Lua to Luan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 46
diff changeset
396 List<LuanJavaFunction> list = fnMap.get(n);
37
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diff changeset
397 if( list==null ) {
48
64ecb7a3aad7 rename Lua to Luan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents: 46
diff changeset
398 list = new ArrayList<LuanJavaFunction>();
37
8a57ebfdfd78 add JavaLib
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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diff changeset
399 fnMap.put(n,list);
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diff changeset
400 }
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diff changeset
401 list.add(fn);
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diff changeset
402 }
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parents:
diff changeset
403 }
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parents:
diff changeset
404
112
f5af13062b10 fix previous rev
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parents: 108
diff changeset
405 @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
406 for( LuanJavaFunction fn : fnMap.get(args.length) ) {
37
8a57ebfdfd78 add JavaLib
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diff changeset
407 try {
55
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408 return fn.rawCall(luan,args);
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409 } catch(IllegalArgumentException e) {}
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410 }
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411 throw luan.exception("no method matched args");
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412 }
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413 }
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414
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415 private static class InstanceOf {
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416 private final Object obj;
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417
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418 InstanceOf(Object obj) {
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419 this.obj = obj;
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420 }
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421
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422 public boolean instanceOf(Static st) {
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423 return st.cls.isInstance(obj);
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424 }
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425 }
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426 private static final Method instanceOf;
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427 static {
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428 try {
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429 instanceOf = InstanceOf.class.getMethod("instanceOf",Static.class);
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430 instanceOf.setAccessible(true);
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431 } catch(NoSuchMethodException e) {
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432 throw new RuntimeException(e);
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433 }
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434 }
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435
61
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436
64
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437 private static class AssertClass {
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438 private final Class cls;
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439
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440 AssertClass(Class cls) {
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441 this.cls = cls;
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442 }
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443
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444 public Object assertClass(LuanState luan,Object v) throws LuanException {
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445 if( !cls.isInstance(v) ) {
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446 String got = v.getClass().getSimpleName();
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447 String expected = cls.getSimpleName();
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448 throw luan.exception("bad argument #1 ("+expected+" expected, got "+got+")");
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449 }
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450 return v;
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451 }
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452 }
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453 private static final Method assertClass;
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454 static {
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455 try {
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456 assertClass = AssertClass.class.getMethod("assertClass",LuanState.class,Object.class);
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457 assertClass.setAccessible(true);
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458 } catch(NoSuchMethodException e) {
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459 throw new RuntimeException(e);
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460 }
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461 }
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462
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diff changeset
463
62
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464 public static Object proxy(final LuanState luan,Static st,final LuanTable t,final Object base) throws LuanException {
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465 return Proxy.newProxyInstance(
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466 st.cls.getClassLoader(),
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467 new Class[]{st.cls},
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468 new InvocationHandler() {
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469 public Object invoke(Object proxy,Method method, Object[] args)
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470 throws Throwable
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471 {
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472 if( args==null )
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473 args = new Object[0];
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474 String name = method.getName();
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475 Object fnObj = t.get(name);
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476 if( fnObj==null && base!=null )
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477 return method.invoke(base,args);
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478 LuanFunction fn = luan.checkFunction(fnObj);
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479 return Luan.first(luan.call(fn,name,args));
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480 }
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481 }
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482 );
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483 }
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484 }