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annotate src/luan/LuanState.java @ 163:3c95a2291d64

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make all module fns non-global and make global fns call module fns git-svn-id: https://luan-java.googlecode.com/svn/trunk@164 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Fri, 20 Jun 2014 09:32:36 +0000
parents d310ebf4d6e7
children 4eaee12f6c65
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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48
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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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20 import luan.lib.HttpLib;
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23 public abstract class LuanState implements DeepCloneable<LuanState> {
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24 private final LuanBit JAVA = bit(LuanElement.JAVA);
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25
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26 public LuanException exception(Object msg) {
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27 return JAVA.exception(msg);
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28 }
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29
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30 public Object call(LuanFunction fn) throws LuanException {
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31 return call(fn,null,LuanFunction.NOTHING);
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32 }
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33
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34 public Object call(LuanFunction fn,String fnName) throws LuanException {
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35 return call(fn,fnName,LuanFunction.NOTHING);
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36 }
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37
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38 public Object call(LuanFunction fn,Object[] args) throws LuanException {
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39 return call(fn,null,args);
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40 }
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41
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42 public Object call(LuanFunction fn,String fnName,Object[] args) throws LuanException {
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43 return JAVA.call(fn,fnName,args);
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44 }
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45
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46 public LuanFunction checkFunction(Object obj) throws LuanException {
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47 return JAVA.checkFunction(obj);
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48 }
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49
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50 public String toString(Object obj) throws LuanException {
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51 return JAVA.toString(obj);
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52 }
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53
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54 public String repr(Object obj) throws LuanException {
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55 return JAVA.repr(obj);
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56 }
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57
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58 public boolean isLessThan(Object o1,Object o2) throws LuanException {
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59 return JAVA.isLessThan(o1,o2);
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60 }
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64 private LuanTable global;
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65 private LuanTable loaded;
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66 private LuanTable preload;
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67 private LuanTable searchers;
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68
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69 private final List<MetatableGetter> mtGetters;
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70 final List<StackTraceElement> stackTrace = new ArrayList<StackTraceElement>();
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71
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72 protected LuanState() {
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73 global = new LuanTable();
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74 global.put("_G",global);
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75 global.put( "_VERSION", Luan.version );
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76 loaded = new LuanTable();
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77 preload = new LuanTable();
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78 searchers = new LuanTable();
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79 mtGetters = new ArrayList<MetatableGetter>();
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80 }
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81
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82 protected LuanState(LuanState luan) {
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83 mtGetters = new ArrayList<MetatableGetter>(luan.mtGetters);
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84 }
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86 @Override public void deepenClone(LuanState clone,DeepCloner cloner) {
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87 clone.global = cloner.deepClone(global);
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88 clone.loaded = cloner.deepClone(loaded);
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89 clone.preload = cloner.deepClone(preload);
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90 clone.searchers = cloner.deepClone(searchers);
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91 }
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93 public abstract LuanTable currentEnvironment();
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95 public final LuanTable global() {
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96 return global;
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97 }
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99 public final LuanTable loaded() {
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100 return loaded;
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101 }
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102
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103 public final LuanTable preload() {
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104 return preload;
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105 }
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106
108
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107 public final LuanTable searchers() {
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108 return searchers;
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109 }
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110
77
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111 public final Object get(String name) {
75
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112 String[] a = name.split("\\.");
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113 LuanTable t = loaded;
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114 for( int i=0; i<a.length-1; i++ ) {
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115 Object obj = t.get(a[i]);
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116 if( !(obj instanceof LuanTable) )
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117 return null;
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118 t = (LuanTable)obj;
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119 }
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120 return t.get(a[a.length-1]);
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121 }
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122
77
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123 public final Object set(String name,Object value) {
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124 String[] a = name.split("\\.");
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125 LuanTable t = loaded;
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126 for( int i=0; i<a.length-1; i++ ) {
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127 Object obj = t.get(a[i]);
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128 if( !(obj instanceof LuanTable) )
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129 return null;
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130 t = (LuanTable)obj;
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131 }
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132 return t.put(a[a.length-1],value);
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133 }
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134
161
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135 public final void globalImport(String modName) throws LuanException {
108
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136 Object mod = PackageLib.require(this,modName);
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137 global.put(modName,mod);
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138 }
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139
59
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140 public static LuanState newStandard() {
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141 try {
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142 LuanState luan = LuanCompiler.newLuanState();
161
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143 luan.globalImport("Package");
143
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144 BasicLib.do_file(luan,"java:luan/lib/init.luan");
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145 return luan;
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146 } catch(LuanException e) {
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147 throw new RuntimeException(e);
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148 }
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149 }
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150
140
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151 public final Object eval(String cmd) {
157
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152 return eval(cmd,new LuanTable());
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153 }
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154
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155 public final Object eval(String cmd,LuanTable env) {
140
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156 try {
157
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157 LuanFunction fn = BasicLib.load(this,cmd,"eval",env,true);
140
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158 return call(fn);
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159 } catch(LuanException e) {
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160 throw new RuntimeException(e);
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161 }
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162 }
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163
48
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164 public final LuanTable getMetatable(Object obj) {
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165 if( obj instanceof LuanTable ) {
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166 LuanTable table = (LuanTable)obj;
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167 return table.getMetatable();
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168 }
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169 for( MetatableGetter mg : mtGetters ) {
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170 LuanTable table = mg.getMetatable(obj);
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171 if( table != null )
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172 return table;
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173 }
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174 return null;
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175 }
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176
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177 public final void addMetatableGetter(MetatableGetter mg) {
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178 mtGetters.add(mg);
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179 }
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180
88
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181 public final LuanBit bit(LuanElement el) {
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182 return new LuanBit(this,el);
48
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183 }
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184
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185 public final Object getHandler(String op,Object obj) {
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186 LuanTable t = getMetatable(obj);
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187 return t==null ? null : t.get(op);
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188 }
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189
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190 }