Mercurial Hosting > luan
annotate src/luan/LuanJavaFunction.java @ 157:1de3e4a6e82d
remove LuanJavaFunction.RTN_NUMBER_ARRAY;
add request.java and response.java;
convert java Object[] members to List;
let LuanState.eval() take env;
improve web_run.luan;
rename LuanParser.JspExpressions to TemplateExpressions and add TemplateStmt;
git-svn-id: https://luan-java.googlecode.com/svn/trunk@158 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Wed, 18 Jun 2014 21:07:11 +0000 |
parents | 0594c132888b |
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1
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1 package luan; |
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2 |
4
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3 import java.lang.reflect.Array; |
1
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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.Map; |
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9 import java.util.HashMap; |
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10 import java.util.Set; |
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11 import java.util.Arrays; |
1
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12 |
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13 |
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14 public final class LuanJavaFunction extends LuanFunction { |
37
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15 private final JavaMethod method; |
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16 private final Object obj; |
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17 private final RtnConverter rtnConverter; |
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18 private final boolean takesLuaState; |
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19 private final ArgConverter[] argConverters; |
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20 private final Class<?> varArgCls; |
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21 |
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22 public LuanJavaFunction(Method method,Object obj) { |
37
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23 this( JavaMethod.of(method), obj ); |
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24 } |
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25 |
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26 public LuanJavaFunction(Constructor constr,Object obj) { |
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27 this( JavaMethod.of(constr), obj ); |
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28 } |
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29 |
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30 LuanJavaFunction(JavaMethod method,Object obj) { |
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31 this.method = method; |
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32 this.obj = obj; |
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33 this.rtnConverter = getRtnConverter(method); |
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34 this.takesLuaState = takesLuaState(method); |
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35 this.argConverters = getArgConverters(takesLuaState,method); |
4
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36 if( method.isVarArgs() ) { |
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37 Class<?>[] paramTypes = method.getParameterTypes(); |
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38 this.varArgCls = paramTypes[paramTypes.length-1].getComponentType(); |
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39 } else { |
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40 this.varArgCls = null; |
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41 } |
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42 } |
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43 |
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44 @Override public String toString() { |
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45 return "java-function: " + method; |
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46 } |
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47 |
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48 public Class<?>[] getParameterTypes() { |
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49 return method.getParameterTypes(); |
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50 } |
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51 |
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52 @Override public Object call(LuanState luan,Object[] args) throws LuanException { |
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53 args = fixArgs(luan,args); |
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54 try { |
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55 return doCall(luan,args); |
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56 } catch(IllegalArgumentException e) { |
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57 checkArgs(luan,args); |
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58 throw e; |
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59 } |
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60 } |
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61 |
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62 public Object rawCall(LuanState luan,Object[] args) throws LuanException { |
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63 args = fixArgs(luan,args); |
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64 return doCall(luan,args); |
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65 } |
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66 |
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67 private Object doCall(LuanState luan,Object[] args) throws LuanException { |
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68 Object rtn; |
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69 try { |
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70 rtn = method.invoke(obj,args); |
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71 } catch(IllegalAccessException e) { |
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72 throw new RuntimeException("method = "+method,e); |
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73 } catch(InvocationTargetException e) { |
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74 Throwable cause = e.getCause(); |
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75 if( cause instanceof Error ) |
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76 throw (Error)cause; |
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77 if( cause instanceof LuanException ) |
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78 throw (LuanException)cause; |
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79 throw luan.exception(cause); |
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80 } catch(InstantiationException e) { |
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81 throw new RuntimeException(e); |
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82 } |
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83 return rtnConverter.convert(rtn); |
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84 } |
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85 |
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86 private static final Map<Class,Class> primitiveMap = new HashMap<Class,Class>(); |
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87 static { |
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88 primitiveMap.put(Boolean.TYPE,Boolean.class); |
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89 primitiveMap.put(Character.TYPE,Character.class); |
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90 primitiveMap.put(Byte.TYPE,Byte.class); |
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91 primitiveMap.put(Short.TYPE,Short.class); |
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92 primitiveMap.put(Integer.TYPE,Integer.class); |
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93 primitiveMap.put(Long.TYPE,Long.class); |
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94 primitiveMap.put(Float.TYPE,Float.class); |
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95 primitiveMap.put(Double.TYPE,Double.class); |
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96 primitiveMap.put(Void.TYPE,Void.class); |
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97 } |
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98 |
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99 private void checkArgs(LuanState luan,Object[] args) throws LuanException { |
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100 Class<?>[] a = getParameterTypes(); |
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101 int start = takesLuaState ? 1 : 0; |
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102 for( int i=start; i<a.length; i++ ) { |
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103 Class<?> paramType = a[i]; |
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104 Class<?> type = paramType; |
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105 if( type.isPrimitive() ) |
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106 type = primitiveMap.get(type); |
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107 Object arg = args[i]; |
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108 if( !type.isInstance(arg) ) { |
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109 String expected = paramType.getSimpleName(); |
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110 if( arg==null ) { |
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111 if( paramType.isPrimitive() ) |
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112 throw luan.exception("bad argument #"+(i+1-start)+" ("+expected+" expected, got nil)"); |
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113 } else { |
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114 String got = arg.getClass().getSimpleName(); |
130
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115 throw luan.exception("bad argument #"+(i+1-start)+" ("+expected+" expected, got "+got+")"); |
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116 } |
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117 } |
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118 } |
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119 } |
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120 |
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121 private Object[] fixArgs(LuanState luan,Object[] args) { |
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122 int n = argConverters.length; |
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123 Object[] rtn; |
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124 int start = 0; |
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125 if( !takesLuaState && varArgCls==null && args.length == n ) { |
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126 rtn = args; |
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127 } else { |
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128 if( takesLuaState ) |
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129 n++; |
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130 rtn = new Object[n]; |
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131 if( takesLuaState ) { |
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132 rtn[start++] = luan; |
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133 } |
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134 n = argConverters.length; |
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135 if( varArgCls != null ) { |
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136 n--; |
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137 if( args.length < argConverters.length ) { |
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138 rtn[rtn.length-1] = Array.newInstance(varArgCls,0); |
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139 } else { |
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140 int len = args.length - n; |
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141 Object varArgs = Array.newInstance(varArgCls,len); |
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142 ArgConverter ac = argConverters[n]; |
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143 for( int i=0; i<len; i++ ) { |
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144 Array.set( varArgs, i, ac.convert(args[n+i]) ); |
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145 } |
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146 rtn[rtn.length-1] = varArgs; |
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147 } |
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148 } |
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149 System.arraycopy(args,0,rtn,start,Math.min(args.length,n)); |
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150 } |
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151 for( int i=0; i<n; i++ ) { |
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152 rtn[start+i] = argConverters[i].convert(rtn[start+i]); |
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153 } |
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154 return rtn; |
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155 } |
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156 |
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157 |
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158 private interface RtnConverter { |
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159 public Object convert(Object obj); |
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160 } |
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161 |
123
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162 private static final RtnConverter RTN_NOTHING = new RtnConverter() { |
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163 @Override public Object[] convert(Object obj) { |
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164 return NOTHING; |
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165 } |
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166 }; |
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167 |
111
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168 private static final RtnConverter RTN_SAME = new RtnConverter() { |
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169 @Override public Object convert(Object obj) { |
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170 return obj; |
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171 } |
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172 }; |
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173 |
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174 private static RtnConverter getRtnConverter(JavaMethod m) { |
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175 Class<?> rtnType = m.getReturnType(); |
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176 if( rtnType == Void.TYPE ) |
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177 return RTN_NOTHING; |
111
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178 return RTN_SAME; |
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179 } |
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180 |
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181 private static boolean isNumber(Class<?> rtnType) { |
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182 return rtnType == Short.TYPE |
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183 || rtnType == Integer.TYPE |
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184 || rtnType == Long.TYPE |
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185 || rtnType == Float.TYPE |
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186 || rtnType == Double.TYPE |
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187 ; |
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188 } |
1
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189 |
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190 private interface ArgConverter { |
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191 public Object convert(Object obj); |
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192 } |
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193 |
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194 private static final ArgConverter ARG_SAME = new ArgConverter() { |
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195 public Object convert(Object obj) { |
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196 return obj; |
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197 } |
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198 }; |
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199 |
95
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200 private static final ArgConverter ARG_BOOLEAN = new ArgConverter() { |
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201 public Object convert(Object obj) { |
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202 return Luan.toBoolean(obj); |
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203 } |
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204 }; |
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205 |
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206 private static final ArgConverter ARG_BOOLEAN_OBJ = new ArgConverter() { |
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207 public Object convert(Object obj) { |
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208 return obj==null ? null : Luan.toBoolean(obj); |
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209 } |
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210 }; |
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211 |
47
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212 private static final ArgConverter ARG_DOUBLE = new ArgConverter() { |
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213 public Object convert(Object obj) { |
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214 if( obj instanceof Double ) |
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215 return obj; |
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216 if( obj instanceof Number ) { |
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217 Number n = (Number)obj; |
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218 return n.doubleValue(); |
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219 } |
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220 if( obj instanceof String ) { |
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221 String s = (String)obj; |
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222 try { |
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223 return Double.valueOf(s); |
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224 } catch(NumberFormatException e) {} |
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225 } |
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226 return obj; |
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227 } |
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228 }; |
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229 |
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230 private static final ArgConverter ARG_FLOAT = new ArgConverter() { |
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231 public Object convert(Object obj) { |
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232 if( obj instanceof Float ) |
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233 return obj; |
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234 if( obj instanceof Number ) { |
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235 Number n = (Number)obj; |
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236 return n.floatValue(); |
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237 } |
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238 if( obj instanceof String ) { |
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239 String s = (String)obj; |
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240 try { |
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241 return Float.valueOf(s); |
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242 } catch(NumberFormatException e) {} |
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243 } |
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244 return obj; |
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245 } |
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246 }; |
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247 |
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248 private static final ArgConverter ARG_LONG = new ArgConverter() { |
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249 public Object convert(Object obj) { |
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250 if( obj instanceof Long ) |
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251 return obj; |
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252 if( obj instanceof Number ) { |
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253 Number n = (Number)obj; |
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254 long r = n.longValue(); |
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255 if( r==n.doubleValue() ) |
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256 return r; |
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257 } |
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258 else if( obj instanceof String ) { |
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259 String s = (String)obj; |
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260 try { |
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261 return Long.valueOf(s); |
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262 } catch(NumberFormatException e) {} |
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263 } |
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264 return obj; |
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265 } |
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266 }; |
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267 |
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268 private static final ArgConverter ARG_INTEGER = new ArgConverter() { |
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269 public Object convert(Object obj) { |
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270 if( obj instanceof Integer ) |
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271 return obj; |
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272 if( obj instanceof Number ) { |
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273 Number n = (Number)obj; |
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274 int r = n.intValue(); |
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275 if( r==n.doubleValue() ) |
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276 return r; |
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277 } |
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278 else if( obj instanceof String ) { |
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279 String s = (String)obj; |
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280 try { |
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281 return Integer.valueOf(s); |
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282 } catch(NumberFormatException e) {} |
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283 } |
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284 return obj; |
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285 } |
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286 }; |
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287 |
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288 private static final ArgConverter ARG_SHORT = new ArgConverter() { |
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289 public Object convert(Object obj) { |
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290 if( obj instanceof Short ) |
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291 return obj; |
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292 if( obj instanceof Number ) { |
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293 Number n = (Number)obj; |
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294 short r = n.shortValue(); |
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295 if( r==n.doubleValue() ) |
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296 return r; |
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297 } |
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298 else if( obj instanceof String ) { |
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299 String s = (String)obj; |
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300 try { |
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301 return Short.valueOf(s); |
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302 } catch(NumberFormatException e) {} |
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303 } |
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304 return obj; |
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305 } |
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306 }; |
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307 |
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308 private static final ArgConverter ARG_BYTE = new ArgConverter() { |
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309 public Object convert(Object obj) { |
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310 if( obj instanceof Byte ) |
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311 return obj; |
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312 if( obj instanceof Number ) { |
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313 Number n = (Number)obj; |
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314 byte r = n.byteValue(); |
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315 if( r==n.doubleValue() ) |
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316 return r; |
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317 } |
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318 else if( obj instanceof String ) { |
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319 String s = (String)obj; |
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320 try { |
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321 return Byte.valueOf(s); |
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322 } catch(NumberFormatException e) {} |
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323 } |
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324 return obj; |
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325 } |
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326 }; |
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327 |
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328 private static final ArgConverter ARG_TABLE = new ArgConverter() { |
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329 public Object convert(Object obj) { |
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330 if( obj == null ) |
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331 return null; |
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332 if( obj instanceof List ) { |
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333 @SuppressWarnings("unchecked") |
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334 List<Object> list = (List<Object>)obj; |
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335 return new LuanTable(list); |
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336 } |
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337 if( obj instanceof Map ) { |
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338 @SuppressWarnings("unchecked") |
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339 Map<Object,Object> map = (Map<Object,Object>)obj; |
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340 return new LuanTable(map); |
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341 } |
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342 if( obj instanceof Set ) { |
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343 @SuppressWarnings("unchecked") |
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344 Set<Object> set = (Set<Object>)obj; |
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345 return new LuanTable(set); |
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346 } |
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347 Class cls = obj.getClass(); |
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348 if( cls.isArray() && !cls.getComponentType().isPrimitive() ) { |
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349 Object[] a = (Object[])obj; |
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350 return new LuanTable(Arrays.asList(a)); |
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351 } |
47
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352 return obj; |
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353 } |
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354 }; |
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355 |
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356 private static final ArgConverter ARG_MAP = new ArgConverter() { |
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357 public Object convert(Object obj) { |
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358 if( obj instanceof LuanTable ) { |
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359 LuanTable t = (LuanTable)obj; |
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360 return t.asMap(); |
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361 } |
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362 return obj; |
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363 } |
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364 }; |
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365 |
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366 private static final ArgConverter ARG_LIST = new ArgConverter() { |
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367 public Object convert(Object obj) { |
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368 if( obj instanceof LuanTable ) { |
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369 LuanTable t = (LuanTable)obj; |
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370 if( t.isList() ) |
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371 return t.asList(); |
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372 } |
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373 return obj; |
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374 } |
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375 }; |
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376 |
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377 private static final ArgConverter ARG_SET = new ArgConverter() { |
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378 public Object convert(Object obj) { |
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379 if( obj instanceof LuanTable ) { |
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380 LuanTable t = (LuanTable)obj; |
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381 if( t.isSet() ) |
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382 return t.asSet(); |
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383 } |
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384 return obj; |
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385 } |
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386 }; |
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387 |
57
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388 private static class ArgArray implements ArgConverter { |
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389 private final Object[] a; |
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390 |
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391 ArgArray(Class cls) { |
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392 a = (Object[])Array.newInstance(cls.getComponentType(),0); |
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393 } |
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394 |
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395 public Object convert(Object obj) { |
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396 if( obj instanceof LuanTable ) { |
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397 LuanTable t = (LuanTable)obj; |
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398 if( t.isList() ) { |
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399 try { |
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400 return t.asList().toArray(a); |
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401 } catch(ArrayStoreException e) {} |
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402 } |
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403 } |
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404 return obj; |
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405 } |
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406 } |
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|
407 |
37
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408 private static boolean takesLuaState(JavaMethod m) { |
21
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409 Class<?>[] paramTypes = m.getParameterTypes(); |
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410 return paramTypes.length > 0 && paramTypes[0].equals(LuanState.class); |
21
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411 } |
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|
412 |
37
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413 private static ArgConverter[] getArgConverters(boolean takesLuaState,JavaMethod m) { |
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|
414 final boolean isVarArgs = m.isVarArgs(); |
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415 Class<?>[] paramTypes = m.getParameterTypes(); |
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416 if( takesLuaState ) { |
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417 Class<?>[] t = new Class<?>[paramTypes.length-1]; |
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418 System.arraycopy(paramTypes,1,t,0,t.length); |
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419 paramTypes = t; |
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420 } |
1
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421 ArgConverter[] a = new ArgConverter[paramTypes.length]; |
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422 for( int i=0; i<a.length; i++ ) { |
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423 Class<?> paramType = paramTypes[i]; |
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424 if( isVarArgs && i == a.length-1 ) |
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|
425 paramType = paramType.getComponentType(); |
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|
426 a[i] = getArgConverter(paramType); |
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427 } |
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428 return a; |
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|
429 } |
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changeset
|
430 |
2df768b926aa
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changeset
|
431 private static ArgConverter getArgConverter(Class<?> cls) { |
95
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432 if( cls == Boolean.TYPE ) |
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433 return ARG_BOOLEAN; |
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434 if( cls.equals(Boolean.class) ) |
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435 return ARG_BOOLEAN_OBJ; |
47
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|
436 if( cls == Double.TYPE || cls.equals(Double.class) ) |
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|
437 return ARG_DOUBLE; |
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|
438 if( cls == Float.TYPE || cls.equals(Float.class) ) |
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439 return ARG_FLOAT; |
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440 if( cls == Long.TYPE || cls.equals(Long.class) ) |
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441 return ARG_LONG; |
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442 if( cls == Integer.TYPE || cls.equals(Integer.class) ) |
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443 return ARG_INTEGER; |
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444 if( cls == Short.TYPE || cls.equals(Short.class) ) |
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445 return ARG_SHORT; |
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446 if( cls == Byte.TYPE || cls.equals(Byte.class) ) |
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|
447 return ARG_BYTE; |
48
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448 if( cls.equals(LuanTable.class) ) |
47
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449 return ARG_TABLE; |
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450 if( cls.equals(Map.class) ) |
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451 return ARG_MAP; |
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452 if( cls.equals(List.class) ) |
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|
453 return ARG_LIST; |
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|
454 if( cls.equals(Set.class) ) |
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|
455 return ARG_SET; |
57
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|
456 if( cls.isArray() && !cls.getComponentType().isPrimitive() ) |
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|
457 return new ArgArray(cls); |
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458 return ARG_SAME; |
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|
459 } |
2df768b926aa
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changeset
|
460 |
37
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diff
changeset
|
461 |
8a57ebfdfd78
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462 |
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463 private static abstract class JavaMethod { |
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464 abstract boolean isVarArgs(); |
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465 abstract Class<?>[] getParameterTypes(); |
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466 abstract Object invoke(Object obj,Object... args) |
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467 throws IllegalAccessException, IllegalArgumentException, InvocationTargetException, InstantiationException; |
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468 abstract Class<?> getReturnType(); |
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469 |
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470 static JavaMethod of(final Method m) { |
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471 return new JavaMethod() { |
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472 @Override boolean isVarArgs() { |
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473 return m.isVarArgs(); |
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474 } |
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475 @Override Class<?>[] getParameterTypes() { |
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476 return m.getParameterTypes(); |
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477 } |
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478 @Override Object invoke(Object obj,Object... args) |
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479 throws IllegalAccessException, IllegalArgumentException, InvocationTargetException |
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480 { |
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481 return m.invoke(obj,args); |
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482 } |
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483 @Override Class<?> getReturnType() { |
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484 return m.getReturnType(); |
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485 } |
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486 @Override public String toString() { |
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487 return m.toString(); |
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488 } |
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489 }; |
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490 } |
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491 |
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492 static JavaMethod of(final Constructor c) { |
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493 return new JavaMethod() { |
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494 @Override boolean isVarArgs() { |
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495 return c.isVarArgs(); |
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496 } |
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497 @Override Class<?>[] getParameterTypes() { |
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498 return c.getParameterTypes(); |
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499 } |
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500 @Override Object invoke(Object obj,Object... args) |
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501 throws IllegalAccessException, IllegalArgumentException, InvocationTargetException, InstantiationException |
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502 { |
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503 return c.newInstance(args); |
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504 } |
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505 @Override Class<?> getReturnType() { |
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506 return c.getDeclaringClass(); |
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507 } |
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508 @Override public String toString() { |
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509 return c.toString(); |
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510 } |
37
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511 }; |
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512 } |
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513 |
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514 } |
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515 |
1
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516 } |