Mercurial Hosting > luan
annotate core/src/luan/LuanJavaFunction.java @ 724:4f8e30a3ffd0
add Hosting.change_domain()
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Tue, 07 Jun 2016 16:00:41 -0600 |
parents | cdc70de628b5 |
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1 package luan; |
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2 |
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3 import java.lang.reflect.Array; |
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4 import java.lang.reflect.Method; |
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5 import java.lang.reflect.Constructor; |
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6 import java.lang.reflect.InvocationTargetException; |
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7 import java.util.List; |
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8 import java.util.ArrayList; |
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9 import java.util.Map; |
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10 import java.util.HashMap; |
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11 import java.util.Set; |
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12 import java.util.Arrays; |
396 | 13 import java.util.Collection; |
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14 |
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15 |
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16 public final class LuanJavaFunction extends LuanFunction { |
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17 private final JavaMethod method; |
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18 private Object obj; |
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19 private final RtnConverter rtnConverter; |
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20 private final boolean takesLuaState; |
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21 private final ArgConverter[] argConverters; |
434 | 22 private final Class varArgCls; |
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23 |
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24 public LuanJavaFunction(Method method,Object obj) { |
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25 this( JavaMethod.of(method), obj ); |
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26 } |
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27 |
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28 public LuanJavaFunction(Constructor constr,Object obj) { |
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29 this( JavaMethod.of(constr), obj ); |
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30 } |
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31 |
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32 private LuanJavaFunction(JavaMethod method,Object obj) { |
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33 this.method = method; |
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34 this.obj = obj; |
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35 this.rtnConverter = getRtnConverter(method); |
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36 this.takesLuaState = takesLuaState(method); |
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37 this.argConverters = getArgConverters(takesLuaState,method); |
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38 if( method.isVarArgs() ) { |
434 | 39 Class[] paramTypes = method.getParameterTypes(); |
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40 this.varArgCls = paramTypes[paramTypes.length-1].getComponentType(); |
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41 } else { |
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42 this.varArgCls = null; |
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43 } |
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44 } |
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45 /* |
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46 private LuanJavaFunction(LuanJavaFunction f) { |
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47 this.method = f.method; |
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48 this.rtnConverter = f.rtnConverter; |
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49 this.takesLuaState = f.takesLuaState; |
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50 this.argConverters = f.argConverters; |
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51 this.varArgCls = f.varArgCls; |
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52 } |
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53 |
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54 @Override public LuanJavaFunction shallowClone() { |
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55 return obj==null ? this : new LuanJavaFunction(this); |
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56 } |
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57 |
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58 @Override public void deepenClone(LuanJavaFunction clone,DeepCloner cloner) { |
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59 clone.obj = cloner.get(obj); |
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60 } |
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61 */ |
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62 @Override public String toString() { |
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63 return "java-function: " + method; |
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64 } |
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65 |
434 | 66 public Class[] getParameterTypes() { |
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67 return method.getParameterTypes(); |
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68 } |
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69 |
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70 @Override public Object call(LuanState luan,Object[] args) throws LuanException { |
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71 try { |
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72 args = fixArgs(luan,args); |
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73 return doCall(args); |
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74 } catch(IllegalArgumentException e) { |
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75 checkArgs(args); |
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76 throw e; |
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77 } |
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78 } |
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79 |
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80 public Object rawCall(LuanState luan,Object[] args) throws LuanException { |
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81 args = fixArgs(luan,args); |
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82 return doCall(args); |
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83 } |
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84 |
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85 private Object doCall(Object[] args) throws LuanException { |
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86 Object rtn; |
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87 try { |
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88 rtn = method.invoke(obj,args); |
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89 } catch(IllegalAccessException e) { |
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90 throw new RuntimeException("method = "+method,e); |
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91 } catch(InvocationTargetException e) { |
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92 Throwable cause = e.getCause(); |
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93 if( cause instanceof Error ) |
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94 throw (Error)cause; |
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95 if( cause instanceof LuanException ) |
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96 throw (LuanException)cause; |
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97 throw new LuanException(cause); |
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98 } catch(InstantiationException e) { |
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99 throw new RuntimeException(e); |
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100 } |
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101 return rtnConverter.convert(rtn); |
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102 } |
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103 |
434 | 104 private static final Map primitiveMap = new HashMap(); |
95
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105 static { |
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106 primitiveMap.put(Boolean.TYPE,Boolean.class); |
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107 primitiveMap.put(Character.TYPE,Character.class); |
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108 primitiveMap.put(Byte.TYPE,Byte.class); |
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109 primitiveMap.put(Short.TYPE,Short.class); |
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110 primitiveMap.put(Integer.TYPE,Integer.class); |
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111 primitiveMap.put(Long.TYPE,Long.class); |
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112 primitiveMap.put(Float.TYPE,Float.class); |
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113 primitiveMap.put(Double.TYPE,Double.class); |
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114 primitiveMap.put(Void.TYPE,Void.class); |
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115 } |
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116 |
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117 private void checkArgs(Object[] args) throws LuanException { |
434 | 118 Class[] a = getParameterTypes(); |
69
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119 int start = takesLuaState ? 1 : 0; |
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120 for( int i=start; i<a.length; i++ ) { |
434 | 121 Class paramType = a[i]; |
122 Class type = paramType; | |
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123 if( type.isPrimitive() ) |
434 | 124 type = (Class)primitiveMap.get(type); |
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125 Object arg = args[i]; |
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126 if( !type.isInstance(arg) ) { |
447 | 127 String expected; |
210
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128 if( i==a.length-1 && method.isVarArgs() ) |
447 | 129 expected = fixType(paramType.getComponentType().getSimpleName())+"..."; |
130 else | |
131 expected = fixType(paramType.getSimpleName()); | |
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132 if( arg==null ) { |
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133 if( paramType.isPrimitive() ) |
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134 throw new LuanException("bad argument #"+(i+1-start)+" ("+expected+" expected, got nil)"); |
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135 } else { |
447 | 136 String got = fixType(arg.getClass().getSimpleName()); |
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137 throw new LuanException("bad argument #"+(i+1-start)+" ("+expected+" expected, got "+got+")"); |
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138 } |
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139 } |
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140 } |
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141 } |
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142 |
447 | 143 private static String fixType(String type) { |
144 if( type.equals("byte[]") ) | |
145 return "binary"; | |
146 if( type.equals("Double") ) | |
147 return "number"; | |
148 if( type.equals("LuanTable") ) | |
149 return "table"; | |
150 if( type.equals("Boolean") ) | |
151 return "boolean"; | |
152 if( type.equals("String") ) | |
153 return "string"; | |
154 if( type.equals("Closure") ) | |
155 return "function"; | |
156 if( type.equals("LuanJavaFunction") ) | |
157 return "function"; | |
158 return type; | |
159 } | |
160 | |
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161 private Object[] fixArgs(LuanState luan,Object[] args) throws LuanException { |
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162 int n = argConverters.length; |
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163 Object[] rtn; |
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164 int start = 0; |
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165 if( !takesLuaState && varArgCls==null && args.length == n ) { |
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166 rtn = args; |
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167 } else { |
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168 if( takesLuaState ) |
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169 n++; |
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170 rtn = new Object[n]; |
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171 if( takesLuaState ) { |
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172 rtn[start++] = luan; |
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173 } |
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174 n = argConverters.length; |
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175 if( varArgCls != null ) { |
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176 n--; |
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177 if( args.length < argConverters.length ) { |
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178 rtn[rtn.length-1] = Array.newInstance(varArgCls,0); |
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179 } else { |
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180 int len = args.length - n; |
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181 Object varArgs = Array.newInstance(varArgCls,len); |
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182 ArgConverter ac = argConverters[n]; |
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183 for( int i=0; i<len; i++ ) { |
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184 Array.set( varArgs, i, ac.convert(luan,args[n+i]) ); |
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185 } |
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186 rtn[rtn.length-1] = varArgs; |
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187 } |
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188 } |
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189 System.arraycopy(args,0,rtn,start,Math.min(args.length,n)); |
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190 } |
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191 for( int i=0; i<n; i++ ) { |
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192 rtn[start+i] = argConverters[i].convert(luan,rtn[start+i]); |
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193 } |
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194 return rtn; |
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195 } |
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196 |
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197 |
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198 private interface RtnConverter { |
111
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199 public Object convert(Object obj); |
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200 } |
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201 |
123
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202 private static final RtnConverter RTN_NOTHING = new RtnConverter() { |
111
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203 @Override public Object[] convert(Object obj) { |
123
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204 return NOTHING; |
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205 } |
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206 }; |
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207 |
111
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208 private static final RtnConverter RTN_SAME = new RtnConverter() { |
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209 @Override public Object convert(Object obj) { |
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210 return obj; |
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211 } |
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212 }; |
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213 |
209
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214 private static final RtnConverter RTN_ARRAY = new RtnConverter() { |
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215 @Override public Object convert(Object obj) { |
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216 if( obj == null ) |
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217 return null; |
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218 Object[] a = new Object[Array.getLength(obj)]; |
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219 for( int i=0; i<a.length; i++ ) { |
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220 a[i] = Array.get(obj,i); |
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221 } |
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222 return new LuanTable(new ArrayList<Object>(Arrays.asList(a))); |
209
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223 } |
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224 }; |
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225 |
297
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226 private static RtnConverter getRtnConverter(JavaMethod m) { |
434 | 227 Class rtnType = m.getReturnType(); |
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228 if( rtnType == Void.TYPE ) |
123
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229 return RTN_NOTHING; |
297
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230 if( !m.isLuan() && rtnType.isArray() && !rtnType.getComponentType().isPrimitive() ) { |
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231 //System.out.println("qqqqqq "+m); |
209
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232 return RTN_ARRAY; |
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233 } |
111
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234 return RTN_SAME; |
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235 } |
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236 |
434 | 237 private static boolean isNumber(Class rtnType) { |
113
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238 return rtnType == Short.TYPE |
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239 || rtnType == Integer.TYPE |
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240 || rtnType == Long.TYPE |
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241 || rtnType == Float.TYPE |
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242 || rtnType == Double.TYPE |
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243 ; |
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244 } |
1
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245 |
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246 private interface ArgConverter { |
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247 public Object convert(LuanState luan,Object obj) throws LuanException; |
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248 } |
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249 |
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250 private static final ArgConverter ARG_SAME = new ArgConverter() { |
432
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251 public Object convert(LuanState luan,Object obj) { |
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252 return obj; |
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253 } |
244
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254 @Override public String toString() { |
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255 return "ARG_SAME"; |
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256 } |
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257 }; |
95
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258 |
47
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259 private static final ArgConverter ARG_DOUBLE = new ArgConverter() { |
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260 public Object convert(LuanState luan,Object obj) { |
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261 if( obj instanceof Double ) |
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262 return obj; |
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263 if( obj instanceof Number ) { |
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264 Number n = (Number)obj; |
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265 return n.doubleValue(); |
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266 } |
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267 return obj; |
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268 } |
244
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269 @Override public String toString() { |
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270 return "ARG_DOUBLE"; |
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271 } |
47
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272 }; |
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273 |
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274 private static final ArgConverter ARG_FLOAT = new ArgConverter() { |
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275 public Object convert(LuanState luan,Object obj) { |
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276 if( obj instanceof Float ) |
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277 return obj; |
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278 if( obj instanceof Number ) { |
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279 Number n = (Number)obj; |
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280 return n.floatValue(); |
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281 } |
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282 return obj; |
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283 } |
244
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284 @Override public String toString() { |
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285 return "ARG_FLOAT"; |
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286 } |
47
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287 }; |
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288 |
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289 private static final ArgConverter ARG_LONG = new ArgConverter() { |
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290 public Object convert(LuanState luan,Object obj) { |
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291 if( obj instanceof Long ) |
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292 return obj; |
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293 if( obj instanceof Number ) { |
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294 Number n = (Number)obj; |
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295 long r = n.longValue(); |
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296 if( r==n.doubleValue() ) |
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297 return r; |
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298 } |
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299 return obj; |
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300 } |
244
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301 @Override public String toString() { |
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302 return "ARG_LONG"; |
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303 } |
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304 }; |
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305 |
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306 private static final ArgConverter ARG_INTEGER = new ArgConverter() { |
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307 public Object convert(LuanState luan,Object obj) { |
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308 if( obj instanceof Integer ) |
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309 return obj; |
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310 if( obj instanceof Number ) { |
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311 Number n = (Number)obj; |
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312 int r = n.intValue(); |
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313 if( r==n.doubleValue() ) |
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314 return r; |
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315 } |
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316 return obj; |
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317 } |
244
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318 @Override public String toString() { |
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319 return "ARG_INTEGER"; |
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320 } |
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321 }; |
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322 |
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323 private static final ArgConverter ARG_SHORT = new ArgConverter() { |
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324 public Object convert(LuanState luan,Object obj) { |
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325 if( obj instanceof Short ) |
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326 return obj; |
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327 if( obj instanceof Number ) { |
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328 Number n = (Number)obj; |
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329 short r = n.shortValue(); |
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330 if( r==n.doubleValue() ) |
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331 return r; |
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332 } |
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333 return obj; |
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334 } |
244
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335 @Override public String toString() { |
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336 return "ARG_SHORT"; |
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337 } |
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338 }; |
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339 |
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340 private static final ArgConverter ARG_BYTE = new ArgConverter() { |
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341 public Object convert(LuanState luan,Object obj) { |
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342 if( obj instanceof Byte ) |
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343 return obj; |
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344 if( obj instanceof Number ) { |
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345 Number n = (Number)obj; |
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346 byte r = n.byteValue(); |
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347 if( r==n.doubleValue() ) |
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348 return r; |
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349 } |
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350 return obj; |
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351 } |
244
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352 @Override public String toString() { |
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353 return "ARG_BYTE"; |
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354 } |
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355 }; |
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356 |
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357 private static final ArgConverter ARG_TABLE = new ArgConverter() { |
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358 public Object convert(LuanState luan,Object obj) { |
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359 if( obj == null ) |
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360 return null; |
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361 if( obj instanceof List ) { |
434 | 362 return new LuanTable((List)obj); |
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363 } |
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364 if( obj instanceof Map ) { |
434 | 365 return new LuanTable((Map)obj); |
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366 } |
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367 if( obj instanceof Set ) { |
434 | 368 return new LuanTable((Set)obj); |
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369 } |
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370 Class cls = obj.getClass(); |
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371 if( cls.isArray() && !cls.getComponentType().isPrimitive() ) { |
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372 Object[] a = (Object[])obj; |
408
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373 return new LuanTable(Arrays.asList(a)); |
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374 } |
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375 return obj; |
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376 } |
244
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377 @Override public String toString() { |
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378 return "ARG_TABLE"; |
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379 } |
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380 }; |
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381 |
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382 private static final ArgConverter ARG_MAP = new ArgConverter() { |
432
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383 public Object convert(LuanState luan,Object obj) throws LuanException { |
408
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384 if( obj instanceof LuanTable ) { |
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385 LuanTable t = (LuanTable)obj; |
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386 return t.asMap(luan); |
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387 } |
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388 return obj; |
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389 } |
244
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390 @Override public String toString() { |
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391 return "ARG_MAP"; |
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392 } |
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393 }; |
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394 |
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395 private static final ArgConverter ARG_LIST = new ArgConverter() { |
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396 public Object convert(LuanState luan,Object obj) { |
408
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397 if( obj instanceof LuanTable ) { |
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398 LuanTable t = (LuanTable)obj; |
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399 if( t.isList() ) |
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400 return t.asList(); |
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401 } |
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402 return obj; |
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403 } |
244
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404 @Override public String toString() { |
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405 return "ARG_LIST"; |
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406 } |
47
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407 }; |
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408 |
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409 private static final ArgConverter ARG_SET = new ArgConverter() { |
432
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410 public Object convert(LuanState luan,Object obj) throws LuanException { |
408
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411 if( obj instanceof LuanTable ) { |
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412 LuanTable t = (LuanTable)obj; |
575
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413 if( t.isSet(luan) ) |
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414 return t.asSet(luan); |
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415 } |
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416 return obj; |
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417 } |
244
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418 @Override public String toString() { |
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419 return "ARG_SET"; |
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420 } |
47
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421 }; |
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422 |
396 | 423 private static final ArgConverter ARG_COLLECTION = new ArgConverter() { |
432
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424 public Object convert(LuanState luan,Object obj) throws LuanException { |
408
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425 if( obj instanceof LuanTable ) { |
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426 LuanTable t = (LuanTable)obj; |
396 | 427 if( t.isList() ) |
428 return t.asList(); | |
575
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429 if( t.isSet(luan) ) |
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430 return t.asSet(luan); |
396 | 431 } |
432 return obj; | |
433 } | |
434 @Override public String toString() { | |
435 return "ARG_COLLECTION"; | |
436 } | |
437 }; | |
438 | |
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439 private static class ArgArray implements ArgConverter { |
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440 private final Object[] a; |
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441 |
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442 ArgArray(Class cls) { |
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443 a = (Object[])Array.newInstance(cls.getComponentType(),0); |
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444 } |
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445 |
432
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446 public Object convert(LuanState luan,Object obj) { |
408
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447 if( obj instanceof LuanTable ) { |
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448 LuanTable t = (LuanTable)obj; |
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449 if( t.isList() ) { |
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450 try { |
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451 return t.asList().toArray(a); |
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452 } catch(ArrayStoreException e) {} |
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453 } |
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454 } |
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455 return obj; |
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|
456 } |
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|
457 } |
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|
458 |
37
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|
459 private static boolean takesLuaState(JavaMethod m) { |
434 | 460 Class[] paramTypes = m.getParameterTypes(); |
48
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461 return paramTypes.length > 0 && paramTypes[0].equals(LuanState.class); |
21
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462 } |
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|
463 |
37
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464 private static ArgConverter[] getArgConverters(boolean takesLuaState,JavaMethod m) { |
4
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465 final boolean isVarArgs = m.isVarArgs(); |
434 | 466 Class[] paramTypes = m.getParameterTypes(); |
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467 if( takesLuaState ) { |
434 | 468 Class[] t = new Class[paramTypes.length-1]; |
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469 System.arraycopy(paramTypes,1,t,0,t.length); |
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470 paramTypes = t; |
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|
471 } |
1
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start Luan
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472 ArgConverter[] a = new ArgConverter[paramTypes.length]; |
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473 for( int i=0; i<a.length; i++ ) { |
434 | 474 Class paramType = paramTypes[i]; |
4
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|
475 if( isVarArgs && i == a.length-1 ) |
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|
476 paramType = paramType.getComponentType(); |
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|
477 a[i] = getArgConverter(paramType); |
1
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|
478 } |
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479 return a; |
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|
480 } |
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481 |
434 | 482 private static ArgConverter getArgConverter(Class cls) { |
47
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|
483 if( cls == Double.TYPE || cls.equals(Double.class) ) |
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484 return ARG_DOUBLE; |
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485 if( cls == Float.TYPE || cls.equals(Float.class) ) |
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486 return ARG_FLOAT; |
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487 if( cls == Long.TYPE || cls.equals(Long.class) ) |
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488 return ARG_LONG; |
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489 if( cls == Integer.TYPE || cls.equals(Integer.class) ) |
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490 return ARG_INTEGER; |
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491 if( cls == Short.TYPE || cls.equals(Short.class) ) |
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492 return ARG_SHORT; |
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493 if( cls == Byte.TYPE || cls.equals(Byte.class) ) |
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494 return ARG_BYTE; |
48
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495 if( cls.equals(LuanTable.class) ) |
47
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496 return ARG_TABLE; |
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497 if( cls.equals(Map.class) ) |
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498 return ARG_MAP; |
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499 if( cls.equals(List.class) ) |
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500 return ARG_LIST; |
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501 if( cls.equals(Set.class) ) |
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502 return ARG_SET; |
396 | 503 if( cls.equals(Collection.class) ) |
504 return ARG_COLLECTION; | |
57
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505 if( cls.isArray() && !cls.getComponentType().isPrimitive() ) |
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|
506 return new ArgArray(cls); |
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|
507 return ARG_SAME; |
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|
508 } |
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|
509 |
37
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|
510 |
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|
511 |
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|
512 private static abstract class JavaMethod { |
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|
513 abstract boolean isVarArgs(); |
434 | 514 abstract Class[] getParameterTypes(); |
37
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|
515 abstract Object invoke(Object obj,Object... args) |
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|
516 throws IllegalAccessException, IllegalArgumentException, InvocationTargetException, InstantiationException; |
434 | 517 abstract Class getReturnType(); |
297
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|
518 abstract boolean isLuan(); |
37
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519 |
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520 static JavaMethod of(final Method m) { |
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521 return new JavaMethod() { |
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522 @Override boolean isVarArgs() { |
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523 return m.isVarArgs(); |
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524 } |
434 | 525 @Override Class[] getParameterTypes() { |
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526 return m.getParameterTypes(); |
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527 } |
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528 @Override Object invoke(Object obj,Object... args) |
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529 throws IllegalAccessException, IllegalArgumentException, InvocationTargetException |
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530 { |
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531 return m.invoke(obj,args); |
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532 } |
434 | 533 @Override Class getReturnType() { |
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534 return m.getReturnType(); |
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535 } |
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536 @Override boolean isLuan() { |
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537 return m.getAnnotation(LuanMethod.class) != null; |
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538 } |
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539 @Override public String toString() { |
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540 return m.toString(); |
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541 } |
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542 }; |
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543 } |
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544 |
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545 static JavaMethod of(final Constructor c) { |
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546 return new JavaMethod() { |
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547 @Override boolean isVarArgs() { |
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548 return c.isVarArgs(); |
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549 } |
434 | 550 @Override Class[] getParameterTypes() { |
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551 return c.getParameterTypes(); |
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552 } |
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553 @Override Object invoke(Object obj,Object... args) |
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554 throws IllegalAccessException, IllegalArgumentException, InvocationTargetException, InstantiationException |
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555 { |
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556 return c.newInstance(args); |
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557 } |
434 | 558 @Override Class getReturnType() { |
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559 return c.getDeclaringClass(); |
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560 } |
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561 @Override boolean isLuan() { |
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562 return false; |
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563 } |
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564 @Override public String toString() { |
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565 return c.toString(); |
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566 } |
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567 }; |
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568 } |
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569 |
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570 } |
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571 |
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572 } |