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annotate core/src/luan/LuanState.java @ 224:05eb2837ddbf

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change LuanTable.put() to not return old value git-svn-id: https://luan-java.googlecode.com/svn/trunk@225 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Mon, 21 Jul 2014 09:27:06 +0000
parents ec016471c6eb
children 4dfa86dbca45
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1 package luan;
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3 import java.io.InputStream;
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4 import java.io.PrintStream;
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5 import java.util.List;
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6 import java.util.ArrayList;
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7 import java.util.Map;
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8 import java.util.LinkedHashMap;
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9 import java.util.Set;
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10 import java.util.HashSet;
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11 import luan.impl.LuanCompiler;
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12 import luan.modules.BasicLuan;
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13 import luan.modules.PackageLuan;
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14 import luan.modules.JavaLuan;
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15 import luan.modules.StringLuan;
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18 public abstract class LuanState implements DeepCloneable<LuanState> {
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20 final List<StackTraceElement> stackTrace = new ArrayList<StackTraceElement>();
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22 private LuanTableImpl registry;
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23 private LuanTableImpl global;
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24 private LuanTableImpl metatable; // generic metatable
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26 protected LuanState() {
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27 registry = new LuanTableImpl();
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28 global = new LuanTableImpl();
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29 global.put("_G",global);
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30 metatable = newMetatable();
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31 }
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33 protected LuanState(LuanState luan) {}
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35 @Override public void deepenClone(LuanState clone,DeepCloner cloner) {
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36 clone.registry = cloner.deepClone(registry);
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37 clone.global = cloner.deepClone(global);
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38 clone.metatable = cloner.deepClone(metatable);
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39 }
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41 public abstract LuanTable currentEnvironment();
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43 public final LuanTable registry() {
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44 return registry;
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45 }
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47 public final LuanTable registryTable(Object key) {
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48 LuanTable tbl = (LuanTable)registry.get(key);
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49 if( tbl == null ) {
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50 tbl = new LuanTableImpl();
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51 registry.put(key,tbl);
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52 }
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53 return tbl;
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54 }
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56 public final LuanTable global() {
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57 return global;
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58 }
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60 public static LuanState newStandard() {
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61 try {
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62 LuanState luan = LuanCompiler.newLuanState();
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63 BasicLuan.do_file(luan,"java:luan/init.luan");
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64 return luan;
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65 } catch(LuanException e) {
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66 throw new RuntimeException(e);
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67 }
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68 }
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70 public final Object eval(String cmd) {
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71 return eval(cmd,new LuanTableImpl());
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72 }
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74 public final Object eval(String cmd,LuanTable env) {
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75 try {
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76 LuanFunction fn = BasicLuan.load(this,cmd,"eval",env,true);
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77 return call(fn);
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78 } catch(LuanException e) {
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79 throw new RuntimeException(e);
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80 }
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81 }
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82
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83 public final LuanTable getMetatable(Object obj) {
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84 if( obj==null )
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85 return null;
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86 if( obj instanceof LuanTable ) {
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87 LuanTable table = (LuanTable)obj;
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88 return table.getMetatable();
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89 }
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90 return metatable;
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91 }
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92
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93 public final LuanBit bit(LuanElement el) {
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94 return new LuanBit(this,el);
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95 }
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97 public final Object getHandler(String op,Object obj) {
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98 LuanTable t = getMetatable(obj);
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99 return t==null ? null : t.get(op);
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100 }
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101
224
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102 public final Object getHandler(String op,LuanTable table) {
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103 LuanTable t = table.getMetatable();
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104 return t==null ? null : t.get(op);
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105 }
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106
221
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107 private static LuanTableImpl newMetatable() {
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108 LuanTableImpl metatable = new LuanTableImpl();
208
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109 try {
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110 metatable.put( "__index", new LuanJavaFunction(
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111 LuanState.class.getMethod("__index",LuanState.class,Object.class,Object.class), null
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112 ) );
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113 metatable.put( "__newindex", new LuanJavaFunction(
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114 LuanState.class.getMethod("__newindex",LuanState.class,Object.class,Object.class,Object.class), null
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115 ) );
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116 } catch(NoSuchMethodException e) {
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117 throw new RuntimeException(e);
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118 }
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119 return metatable;
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120 }
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121
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122 public static Object __index(LuanState luan,Object obj,Object key) throws LuanException {
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123 if( obj instanceof String ) {
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124 Object rtn = StringLuan.__index(luan,(String)obj,key);
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125 if( rtn != null )
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126 return rtn;
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127 }
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128 return JavaLuan.__index(luan,obj,key);
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129 }
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130
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131 public static void __newindex(LuanState luan,Object obj,Object key,Object value) throws LuanException {
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132 JavaLuan.__newindex(luan,obj,key,value);
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133 }
199
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134
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135 // convenience methods
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136
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137 private final LuanBit JAVA = bit(LuanElement.JAVA);
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138
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139 public LuanException exception(Object msg) {
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140 return JAVA.exception(msg);
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141 }
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142
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143 public Object call(LuanFunction fn) throws LuanException {
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144 return call(fn,null,LuanFunction.NOTHING);
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145 }
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146
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147 public Object call(LuanFunction fn,String fnName) throws LuanException {
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148 return call(fn,fnName,LuanFunction.NOTHING);
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149 }
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150
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151 public Object call(LuanFunction fn,Object[] args) throws LuanException {
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152 return call(fn,null,args);
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153 }
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154
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155 public Object call(LuanFunction fn,String fnName,Object[] args) throws LuanException {
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156 return JAVA.call(fn,fnName,args);
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157 }
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158
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159 public LuanFunction checkFunction(Object obj) throws LuanException {
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160 return JAVA.checkFunction(obj);
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161 }
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162
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163 public String toString(Object obj) throws LuanException {
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164 return JAVA.toString(obj);
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165 }
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166
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167 public String repr(Object obj) throws LuanException {
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168 return JAVA.repr(obj);
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169 }
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170
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171 public boolean isLessThan(Object o1,Object o2) throws LuanException {
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172 return JAVA.isLessThan(o1,o2);
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173 }
48
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174 }