Mercurial Hosting > luan
annotate src/luan/LuanJavaFunction.java @ 1120:e8fc6712b468
luan Rpc uses luan.lib.rpc
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Mon, 07 Aug 2017 23:50:52 -0600 |
parents | b1f6dafa72fc |
children | 4cf541886663 |
rev | line source |
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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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Make LuanJavaFunction not DeepCloneable. There is no reason for most to be DeepCloneable and those that should be can be made DeepCloneable individually.
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16 public final class LuanJavaFunction extends LuanFunction { |
37
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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; |
21
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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 ); |
37
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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 @Override public String toString() { |
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47 return "java-function: " + method; |
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48 } |
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49 |
783 | 50 public int getParameterCount() { |
51 return argConverters.length; | |
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52 } |
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53 |
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54 public boolean isVarArgs() { |
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55 return method.isVarArgs(); |
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56 } |
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57 |
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58 @Override public Object call(LuanState luan,Object[] args) throws LuanException { |
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59 try { |
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60 args = fixArgs(luan,args); |
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61 return doCall(args); |
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62 } catch(IllegalArgumentException e) { |
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63 checkArgs(args); |
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64 throw e; |
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65 } |
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66 } |
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67 |
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68 public Object rawCall(LuanState luan,Object[] args) throws LuanException { |
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69 args = fixArgs(luan,args); |
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70 return doCall(args); |
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71 } |
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72 |
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73 private Object doCall(Object[] args) throws LuanException { |
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74 Object rtn; |
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75 try { |
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76 rtn = method.invoke(obj,args); |
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77 } catch(IllegalAccessException e) { |
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78 throw new RuntimeException("method = "+method,e); |
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79 } catch(InvocationTargetException e) { |
40
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80 Throwable cause = e.getCause(); |
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81 if( cause instanceof Error ) |
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82 throw (Error)cause; |
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83 if( cause instanceof LuanException ) |
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84 throw (LuanException)cause; |
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85 throw new LuanException(cause); |
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86 } catch(InstantiationException e) { |
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87 throw new RuntimeException(e); |
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88 } |
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89 return rtnConverter.convert(rtn); |
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90 } |
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91 |
434 | 92 private static final Map primitiveMap = new HashMap(); |
95
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93 static { |
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94 primitiveMap.put(Boolean.TYPE,Boolean.class); |
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95 primitiveMap.put(Character.TYPE,Character.class); |
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96 primitiveMap.put(Byte.TYPE,Byte.class); |
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97 primitiveMap.put(Short.TYPE,Short.class); |
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98 primitiveMap.put(Integer.TYPE,Integer.class); |
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99 primitiveMap.put(Long.TYPE,Long.class); |
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100 primitiveMap.put(Float.TYPE,Float.class); |
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101 primitiveMap.put(Double.TYPE,Double.class); |
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102 primitiveMap.put(Void.TYPE,Void.class); |
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103 } |
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104 |
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105 private void checkArgs(Object[] args) throws LuanException { |
783 | 106 Class[] a = method.getParameterTypes(); |
69
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107 int start = takesLuaState ? 1 : 0; |
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108 for( int i=start; i<a.length; i++ ) { |
434 | 109 Class paramType = a[i]; |
110 Class type = paramType; | |
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111 if( type.isPrimitive() ) |
434 | 112 type = (Class)primitiveMap.get(type); |
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113 Object arg = args[i]; |
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114 if( !type.isInstance(arg) ) { |
447 | 115 String expected; |
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116 if( i==a.length-1 && method.isVarArgs() ) |
1080 | 117 expected = fixType(paramType.getComponentType().getSimpleName())+"..."; |
447 | 118 else |
1080 | 119 expected = fixType(paramType.getSimpleName()); |
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120 if( arg==null ) { |
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121 if( paramType.isPrimitive() ) |
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122 throw new LuanException("bad argument #"+(i+1-start)+" ("+expected+" expected, got nil)"); |
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123 } else { |
1080 | 124 String got = fixType(arg.getClass().getSimpleName()); |
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125 throw new LuanException("bad argument #"+(i+1-start)+" ("+expected+" expected, got "+got+")"); |
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126 } |
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127 } |
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128 } |
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129 } |
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130 |
1080 | 131 private static String fixType(String type) { |
132 if( type.equals("byte[]") ) | |
133 return "binary"; | |
134 if( type.equals("Double") ) | |
135 return "number"; | |
136 if( type.equals("LuanTable") ) | |
137 return "table"; | |
138 if( type.equals("Boolean") ) | |
861 | 139 return "boolean"; |
1080 | 140 if( type.equals("String") ) |
861 | 141 return "string"; |
1080 | 142 if( type.equals("Closure") ) |
143 return "function"; | |
144 if( type.equals("LuanJavaFunction") ) | |
145 return "function"; | |
146 return type; | |
447 | 147 } |
148 | |
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149 private Object[] fixArgs(LuanState luan,Object[] args) throws LuanException { |
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150 int n = argConverters.length; |
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151 Object[] rtn; |
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152 int start = 0; |
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153 if( !takesLuaState && varArgCls==null && args.length == n ) { |
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154 rtn = args; |
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155 } else { |
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156 if( takesLuaState ) |
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157 n++; |
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158 rtn = new Object[n]; |
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159 if( takesLuaState ) { |
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160 rtn[start++] = luan; |
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161 } |
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162 n = argConverters.length; |
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163 if( varArgCls != null ) { |
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164 n--; |
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165 if( args.length < argConverters.length ) { |
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166 rtn[rtn.length-1] = Array.newInstance(varArgCls,0); |
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167 } else { |
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168 int len = args.length - n; |
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169 Object varArgs = Array.newInstance(varArgCls,len); |
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170 ArgConverter ac = argConverters[n]; |
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171 for( int i=0; i<len; i++ ) { |
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172 Array.set( varArgs, i, ac.convert(luan,args[n+i]) ); |
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173 } |
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174 rtn[rtn.length-1] = varArgs; |
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175 } |
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176 } |
21
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177 System.arraycopy(args,0,rtn,start,Math.min(args.length,n)); |
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178 } |
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179 for( int i=0; i<n; i++ ) { |
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180 rtn[start+i] = argConverters[i].convert(luan,rtn[start+i]); |
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181 } |
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182 return rtn; |
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183 } |
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184 |
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185 |
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186 private interface RtnConverter { |
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187 public Object convert(Object obj); |
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188 } |
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189 |
123
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190 private static final RtnConverter RTN_NOTHING = new RtnConverter() { |
111
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191 @Override public Object[] convert(Object obj) { |
123
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192 return NOTHING; |
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193 } |
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194 }; |
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195 |
111
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196 private static final RtnConverter RTN_SAME = new RtnConverter() { |
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197 @Override public Object convert(Object obj) { |
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198 return obj; |
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199 } |
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200 }; |
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201 |
209
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202 private static final RtnConverter RTN_ARRAY = new RtnConverter() { |
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203 @Override public Object convert(Object obj) { |
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204 if( obj == null ) |
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205 return null; |
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206 Object[] a = new Object[Array.getLength(obj)]; |
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207 for( int i=0; i<a.length; i++ ) { |
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208 a[i] = Array.get(obj,i); |
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209 } |
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210 return new LuanTable(new ArrayList<Object>(Arrays.asList(a))); |
209
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211 } |
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212 }; |
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213 |
297
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214 private static RtnConverter getRtnConverter(JavaMethod m) { |
434 | 215 Class rtnType = m.getReturnType(); |
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216 if( rtnType == Void.TYPE ) |
123
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217 return RTN_NOTHING; |
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218 if( !m.isLuan() && rtnType.isArray() && !rtnType.getComponentType().isPrimitive() ) { |
209
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219 return RTN_ARRAY; |
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220 } |
111
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221 return RTN_SAME; |
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222 } |
1086 | 223 /* |
434 | 224 private static boolean isNumber(Class rtnType) { |
113
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225 return rtnType == Short.TYPE |
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226 || rtnType == Integer.TYPE |
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227 || rtnType == Long.TYPE |
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228 || rtnType == Float.TYPE |
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229 || rtnType == Double.TYPE |
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230 ; |
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231 } |
1086 | 232 */ |
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233 private interface ArgConverter { |
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234 public Object convert(LuanState luan,Object obj) throws LuanException; |
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235 } |
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236 |
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237 private static final ArgConverter ARG_SAME = new ArgConverter() { |
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238 public Object convert(LuanState luan,Object obj) { |
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239 return obj; |
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240 } |
244
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241 @Override public String toString() { |
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242 return "ARG_SAME"; |
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243 } |
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244 }; |
95
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245 |
47
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246 private static final ArgConverter ARG_DOUBLE = new ArgConverter() { |
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247 public Object convert(LuanState luan,Object obj) { |
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248 if( obj instanceof Double ) |
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249 return obj; |
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250 if( obj instanceof Number ) { |
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251 Number n = (Number)obj; |
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252 return n.doubleValue(); |
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253 } |
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254 return obj; |
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255 } |
244
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256 @Override public String toString() { |
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257 return "ARG_DOUBLE"; |
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258 } |
47
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259 }; |
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260 |
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261 private static final ArgConverter ARG_FLOAT = new ArgConverter() { |
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262 public Object convert(LuanState luan,Object obj) { |
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263 if( obj instanceof Float ) |
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264 return obj; |
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265 if( obj instanceof Number ) { |
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266 Number n = (Number)obj; |
98
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267 return n.floatValue(); |
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268 } |
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269 return obj; |
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270 } |
244
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271 @Override public String toString() { |
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272 return "ARG_FLOAT"; |
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273 } |
47
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274 }; |
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275 |
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276 private static final ArgConverter ARG_LONG = new ArgConverter() { |
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277 public Object convert(LuanState luan,Object obj) { |
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278 if( obj instanceof Long ) |
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279 return obj; |
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280 if( obj instanceof Number ) { |
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281 Number n = (Number)obj; |
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282 long r = n.longValue(); |
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283 if( r==n.doubleValue() ) |
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284 return r; |
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285 } |
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286 return obj; |
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287 } |
244
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288 @Override public String toString() { |
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289 return "ARG_LONG"; |
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290 } |
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291 }; |
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292 |
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293 private static final ArgConverter ARG_INTEGER = new ArgConverter() { |
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294 public Object convert(LuanState luan,Object obj) { |
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295 if( obj instanceof Integer ) |
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296 return obj; |
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297 if( obj instanceof Number ) { |
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298 Number n = (Number)obj; |
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299 int r = n.intValue(); |
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300 if( r==n.doubleValue() ) |
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301 return r; |
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302 } |
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303 return obj; |
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304 } |
244
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305 @Override public String toString() { |
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306 return "ARG_INTEGER"; |
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307 } |
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308 }; |
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309 |
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310 private static final ArgConverter ARG_SHORT = new ArgConverter() { |
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311 public Object convert(LuanState luan,Object obj) { |
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312 if( obj instanceof Short ) |
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313 return obj; |
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314 if( obj instanceof Number ) { |
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315 Number n = (Number)obj; |
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316 short r = n.shortValue(); |
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317 if( r==n.doubleValue() ) |
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318 return r; |
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319 } |
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320 return obj; |
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321 } |
244
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322 @Override public String toString() { |
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323 return "ARG_SHORT"; |
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324 } |
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325 }; |
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326 |
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327 private static final ArgConverter ARG_BYTE = new ArgConverter() { |
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328 public Object convert(LuanState luan,Object obj) { |
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329 if( obj instanceof Byte ) |
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330 return obj; |
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331 if( obj instanceof Number ) { |
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332 Number n = (Number)obj; |
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333 byte r = n.byteValue(); |
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334 if( r==n.doubleValue() ) |
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335 return r; |
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336 } |
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337 return obj; |
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338 } |
244
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339 @Override public String toString() { |
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340 return "ARG_BYTE"; |
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341 } |
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342 }; |
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343 |
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344 private static final ArgConverter ARG_TABLE = new ArgConverter() { |
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345 public Object convert(LuanState luan,Object obj) { |
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346 if( obj == null ) |
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347 return null; |
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348 if( obj instanceof List ) { |
434 | 349 return new LuanTable((List)obj); |
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350 } |
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351 if( obj instanceof Map ) { |
434 | 352 return new LuanTable((Map)obj); |
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353 } |
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354 if( obj instanceof Set ) { |
434 | 355 return new LuanTable((Set)obj); |
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356 } |
55
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357 Class cls = obj.getClass(); |
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358 if( cls.isArray() && !cls.getComponentType().isPrimitive() ) { |
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359 Object[] a = (Object[])obj; |
408
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360 return new LuanTable(Arrays.asList(a)); |
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361 } |
47
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362 return obj; |
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363 } |
244
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364 @Override public String toString() { |
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365 return "ARG_TABLE"; |
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366 } |
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367 }; |
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368 |
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369 private static final ArgConverter ARG_MAP = new ArgConverter() { |
432
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370 public Object convert(LuanState luan,Object obj) throws LuanException { |
408
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371 if( obj instanceof LuanTable ) { |
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372 LuanTable t = (LuanTable)obj; |
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373 return t.asMap(luan); |
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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_MAP"; |
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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_LIST = new ArgConverter() { |
432
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383 public Object convert(LuanState luan,Object obj) { |
408
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384 if( obj instanceof LuanTable ) { |
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385 LuanTable t = (LuanTable)obj; |
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386 if( t.isList() ) |
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387 return t.asList(); |
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388 } |
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389 return obj; |
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390 } |
244
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391 @Override public String toString() { |
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392 return "ARG_LIST"; |
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393 } |
47
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394 }; |
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395 |
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396 private static final ArgConverter ARG_SET = new ArgConverter() { |
432
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397 public Object convert(LuanState luan,Object obj) throws LuanException { |
408
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398 if( obj instanceof LuanTable ) { |
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399 LuanTable t = (LuanTable)obj; |
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400 if( t.isSet(luan) ) |
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401 return t.asSet(luan); |
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402 } |
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403 return obj; |
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404 } |
244
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405 @Override public String toString() { |
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406 return "ARG_SET"; |
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407 } |
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408 }; |
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409 |
396 | 410 private static final ArgConverter ARG_COLLECTION = new ArgConverter() { |
432
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411 public Object convert(LuanState luan,Object obj) throws LuanException { |
408
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412 if( obj instanceof LuanTable ) { |
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413 LuanTable t = (LuanTable)obj; |
396 | 414 if( t.isList() ) |
415 return t.asList(); | |
575
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416 if( t.isSet(luan) ) |
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417 return t.asSet(luan); |
396 | 418 } |
419 return obj; | |
420 } | |
421 @Override public String toString() { | |
422 return "ARG_COLLECTION"; | |
423 } | |
424 }; | |
425 | |
57
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426 private static class ArgArray implements ArgConverter { |
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427 private final Object[] a; |
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428 |
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429 ArgArray(Class cls) { |
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430 a = (Object[])Array.newInstance(cls.getComponentType(),0); |
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431 } |
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parents:
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432 |
432
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Franklin Schmidt <fschmidt@gmail.com>
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433 public Object convert(LuanState luan,Object obj) { |
408
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merge LuanTableImpl into LuanTable
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434 if( obj instanceof LuanTable ) { |
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435 LuanTable t = (LuanTable)obj; |
57
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436 if( t.isList() ) { |
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437 try { |
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438 return t.asList().toArray(a); |
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439 } catch(ArrayStoreException e) {} |
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440 } |
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441 } |
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442 return obj; |
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443 } |
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444 } |
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|
445 |
37
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changeset
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446 private static boolean takesLuaState(JavaMethod m) { |
434 | 447 Class[] paramTypes = m.getParameterTypes(); |
48
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448 return paramTypes.length > 0 && paramTypes[0].equals(LuanState.class); |
21
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449 } |
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450 |
37
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451 private static ArgConverter[] getArgConverters(boolean takesLuaState,JavaMethod m) { |
4
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452 final boolean isVarArgs = m.isVarArgs(); |
434 | 453 Class[] paramTypes = m.getParameterTypes(); |
21
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454 if( takesLuaState ) { |
434 | 455 Class[] t = new Class[paramTypes.length-1]; |
21
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456 System.arraycopy(paramTypes,1,t,0,t.length); |
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457 paramTypes = t; |
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458 } |
1
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459 ArgConverter[] a = new ArgConverter[paramTypes.length]; |
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460 for( int i=0; i<a.length; i++ ) { |
434 | 461 Class paramType = paramTypes[i]; |
4
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462 if( isVarArgs && i == a.length-1 ) |
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463 paramType = paramType.getComponentType(); |
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464 a[i] = getArgConverter(paramType); |
1
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465 } |
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466 return a; |
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|
467 } |
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468 |
434 | 469 private static ArgConverter getArgConverter(Class cls) { |
47
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470 if( cls == Double.TYPE || cls.equals(Double.class) ) |
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471 return ARG_DOUBLE; |
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472 if( cls == Float.TYPE || cls.equals(Float.class) ) |
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473 return ARG_FLOAT; |
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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474 if( cls == Long.TYPE || cls.equals(Long.class) ) |
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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475 return ARG_LONG; |
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476 if( cls == Integer.TYPE || cls.equals(Integer.class) ) |
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477 return ARG_INTEGER; |
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478 if( cls == Short.TYPE || cls.equals(Short.class) ) |
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479 return ARG_SHORT; |
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480 if( cls == Byte.TYPE || cls.equals(Byte.class) ) |
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481 return ARG_BYTE; |
48
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changeset
|
482 if( cls.equals(LuanTable.class) ) |
47
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483 return ARG_TABLE; |
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484 if( cls.equals(Map.class) ) |
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|
485 return ARG_MAP; |
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parents:
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|
486 if( cls.equals(List.class) ) |
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487 return ARG_LIST; |
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|
488 if( cls.equals(Set.class) ) |
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489 return ARG_SET; |
396 | 490 if( cls.equals(Collection.class) ) |
491 return ARG_COLLECTION; | |
57
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492 if( cls.isArray() && !cls.getComponentType().isPrimitive() ) |
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493 return new ArgArray(cls); |
1
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494 return ARG_SAME; |
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changeset
|
495 } |
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changeset
|
496 |
37
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|
497 |
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|
498 |
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|
499 private static abstract class JavaMethod { |
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|
500 abstract boolean isVarArgs(); |
434 | 501 abstract Class[] getParameterTypes(); |
37
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502 abstract Object invoke(Object obj,Object... args) |
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503 throws IllegalAccessException, IllegalArgumentException, InvocationTargetException, InstantiationException; |
434 | 504 abstract Class getReturnType(); |
297
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|
505 abstract boolean isLuan(); |
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changeset
|
506 |
8a57ebfdfd78
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|
507 static JavaMethod of(final Method m) { |
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508 return new JavaMethod() { |
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changeset
|
509 @Override boolean isVarArgs() { |
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|
510 return m.isVarArgs(); |
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|
511 } |
434 | 512 @Override Class[] getParameterTypes() { |
37
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|
513 return m.getParameterTypes(); |
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|
514 } |
43
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changeset
|
515 @Override Object invoke(Object obj,Object... args) |
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|
516 throws IllegalAccessException, IllegalArgumentException, InvocationTargetException |
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|
517 { |
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518 return m.invoke(obj,args); |
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519 } |
434 | 520 @Override Class getReturnType() { |
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521 return m.getReturnType(); |
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522 } |
297
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changeset
|
523 @Override boolean isLuan() { |
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|
524 return m.getAnnotation(LuanMethod.class) != null; |
899253043270
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525 } |
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526 @Override public String toString() { |
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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527 return m.toString(); |
80b67b1a653c
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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528 } |
37
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529 }; |
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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530 } |
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531 |
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532 static JavaMethod of(final Constructor c) { |
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533 return new JavaMethod() { |
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534 @Override boolean isVarArgs() { |
37
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535 return c.isVarArgs(); |
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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536 } |
434 | 537 @Override Class[] getParameterTypes() { |
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538 return c.getParameterTypes(); |
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539 } |
43
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540 @Override Object invoke(Object obj,Object... args) |
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541 throws IllegalAccessException, IllegalArgumentException, InvocationTargetException, InstantiationException |
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542 { |
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543 return c.newInstance(args); |
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544 } |
434 | 545 @Override Class getReturnType() { |
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546 return c.getDeclaringClass(); |
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547 } |
297
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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548 @Override boolean isLuan() { |
899253043270
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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549 return false; |
899253043270
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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550 } |
43
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551 @Override public String toString() { |
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552 return c.toString(); |
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553 } |
37
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554 }; |
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555 } |
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556 |
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557 } |
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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558 |
1
2df768b926aa
start Luan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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559 } |