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annotate src/luan/LuanState.java @ 130:0594c132888b

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cleanup git-svn-id: https://luan-java.googlecode.com/svn/trunk@131 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Tue, 10 Jun 2014 02:43:40 +0000
parents f0a4abe58593
children 3119326260ea
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 package luan;
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2
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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 luan.interp.LuanCompiler;
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10 import luan.lib.BasicLib;
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11 import luan.lib.PackageLib;
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12 import luan.lib.JavaLib;
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13 import luan.lib.MathLib;
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14 import luan.lib.StringLib;
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15 import luan.lib.TableLib;
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16 import luan.lib.HtmlLib;
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17 import luan.lib.BinaryLib;
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18 import luan.lib.IoLib;
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19 import luan.lib.ThreadLib;
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21
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22 public abstract class LuanState implements DeepCloneable<LuanState> {
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23 private final LuanBit JAVA = bit(LuanElement.JAVA);
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24
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25 public LuanException exception(Object msg) {
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26 return JAVA.exception(msg);
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27 }
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29 public Object call(LuanFunction fn) throws LuanException {
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30 return call(fn,null,LuanFunction.NOTHING);
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31 }
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32
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33 public Object call(LuanFunction fn,String fnName) throws LuanException {
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34 return call(fn,fnName,LuanFunction.NOTHING);
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35 }
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36
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37 public Object call(LuanFunction fn,Object[] args) throws LuanException {
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38 return call(fn,null,args);
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39 }
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40
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41 public Object call(LuanFunction fn,String fnName,Object[] args) throws LuanException {
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42 return JAVA.call(fn,fnName,args);
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43 }
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44
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45 public LuanFunction checkFunction(Object obj) throws LuanException {
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46 return JAVA.checkFunction(obj);
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47 }
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48
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49 public String toString(Object obj) throws LuanException {
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50 return JAVA.toString(obj);
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51 }
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52
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53 public String repr(Object obj) throws LuanException {
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54 return JAVA.repr(obj);
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55 }
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56
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57 public boolean isLessThan(Object o1,Object o2) throws LuanException {
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58 return JAVA.isLessThan(o1,o2);
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59 }
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63 private LuanTable global;
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64 private LuanTable loaded;
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65 private LuanTable preload;
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66 private LuanTable searchers;
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67
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68 private final List<MetatableGetter> mtGetters;
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69 final List<StackTraceElement> stackTrace = new ArrayList<StackTraceElement>();
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71 protected LuanState() {
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72 global = new LuanTable();
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73 global.put("_G",global);
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74 loaded = new LuanTable();
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75 preload = new LuanTable();
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76 searchers = new LuanTable();
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77 mtGetters = new ArrayList<MetatableGetter>();
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78 }
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79
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80 protected LuanState(LuanState luan) {
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81 mtGetters = new ArrayList<MetatableGetter>(luan.mtGetters);
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82 }
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84 @Override public void deepenClone(LuanState clone,DeepCloner cloner) {
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85 clone.global = cloner.deepClone(global);
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86 clone.loaded = cloner.deepClone(loaded);
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87 clone.preload = cloner.deepClone(preload);
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88 clone.searchers = cloner.deepClone(searchers);
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89 }
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91 public abstract LuanTable currentEnvironment();
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93 public final LuanTable global() {
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94 return global;
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95 }
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97 public final LuanTable loaded() {
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98 return loaded;
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99 }
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100
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101 public final LuanTable preload() {
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102 return preload;
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103 }
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104
108
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105 public final LuanTable searchers() {
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106 return searchers;
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107 }
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108
77
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109 public final Object get(String name) {
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110 String[] a = name.split("\\.");
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111 LuanTable t = loaded;
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112 for( int i=0; i<a.length-1; i++ ) {
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113 Object obj = t.get(a[i]);
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114 if( !(obj instanceof LuanTable) )
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115 return null;
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116 t = (LuanTable)obj;
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117 }
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118 return t.get(a[a.length-1]);
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119 }
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120
77
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121 public final Object set(String name,Object value) {
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122 String[] a = name.split("\\.");
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123 LuanTable t = loaded;
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124 for( int i=0; i<a.length-1; i++ ) {
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125 Object obj = t.get(a[i]);
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126 if( !(obj instanceof LuanTable) )
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127 return null;
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128 t = (LuanTable)obj;
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129 }
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130 return t.put(a[a.length-1],value);
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131 }
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132
84
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133 public final void load(String modName,LuanFunction loader) throws LuanException {
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134 preload.put(modName,loader);
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135 Object mod = PackageLib.require(this,modName);
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136 if( mod==null )
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137 throw new RuntimeException();
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138 global.put(modName,mod);
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139 }
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140
59
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141 public static LuanState newStandard() {
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142 try {
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143 LuanState luan = LuanCompiler.newLuanState();
124
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144 BasicLib.load(luan);
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145 PackageLib.load(luan);
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146 MathLib.load(luan);
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147 StringLib.load(luan);
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148 TableLib.load(luan);
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149 HtmlLib.load(luan);
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150 BinaryLib.load(luan);
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151 IoLib.load(luan);
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152 ThreadLib.load(luan);
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153 BasicLib.do_java_resource(luan,"luan/lib/init.luan");
124
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154 JavaLib.load(luan);
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155 return luan;
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156 } catch(LuanException e) {
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157 throw new RuntimeException(e);
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158 }
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159 }
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160
130
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161 public final Object eval(String cmd) throws LuanException {
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162 LuanFunction fn = BasicLib.load(this,cmd,"eval",true,true);
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163 return call(fn);
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164 }
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165
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166
48
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167 public final LuanTable getMetatable(Object obj) {
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168 if( obj instanceof LuanTable ) {
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169 LuanTable table = (LuanTable)obj;
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170 return table.getMetatable();
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171 }
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172 for( MetatableGetter mg : mtGetters ) {
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173 LuanTable table = mg.getMetatable(obj);
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174 if( table != null )
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175 return table;
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176 }
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177 return null;
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178 }
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179
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180 public final void addMetatableGetter(MetatableGetter mg) {
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181 mtGetters.add(mg);
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182 }
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183
88
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184 public final LuanBit bit(LuanElement el) {
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185 return new LuanBit(this,el);
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186 }
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187
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188 public final Object getHandler(String op,Object obj) {
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189 LuanTable t = getMetatable(obj);
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190 return t==null ? null : t.get(op);
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191 }
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192
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193 }