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annotate src/luan/LuanState.java @ 128:f0a4abe58593

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minor git-svn-id: https://luan-java.googlecode.com/svn/trunk@129 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Sun, 08 Jun 2014 03:38:25 +0000
parents 0149bdf98fd8
children 0594c132888b
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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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22 public abstract class LuanState implements DeepCloneable<LuanState> {
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23 public final LuanBit JAVA = bit(LuanElement.JAVA);
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25 private LuanTable global;
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26 private LuanTable loaded;
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27 private LuanTable preload;
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28 private LuanTable searchers;
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30 private final List<MetatableGetter> mtGetters;
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31 final List<StackTraceElement> stackTrace = new ArrayList<StackTraceElement>();
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33 protected LuanState() {
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34 global = new LuanTable();
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35 global.put("_G",global);
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36 loaded = new LuanTable();
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37 preload = new LuanTable();
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38 searchers = new LuanTable();
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39 mtGetters = new ArrayList<MetatableGetter>();
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40 }
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42 protected LuanState(LuanState luan) {
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43 mtGetters = new ArrayList<MetatableGetter>(luan.mtGetters);
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44 }
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46 @Override public void deepenClone(LuanState clone,DeepCloner cloner) {
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47 clone.global = cloner.deepClone(global);
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48 clone.loaded = cloner.deepClone(loaded);
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49 clone.preload = cloner.deepClone(preload);
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50 clone.searchers = cloner.deepClone(searchers);
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51 }
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53 public abstract LuanTable currentEnvironment();
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55 public final LuanTable global() {
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56 return global;
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57 }
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59 public final LuanTable loaded() {
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60 return loaded;
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61 }
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63 public final LuanTable preload() {
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64 return preload;
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65 }
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67 public final LuanTable searchers() {
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68 return searchers;
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69 }
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71 public final Object get(String name) {
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72 String[] a = name.split("\\.");
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73 LuanTable t = loaded;
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74 for( int i=0; i<a.length-1; i++ ) {
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75 Object obj = t.get(a[i]);
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76 if( !(obj instanceof LuanTable) )
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77 return null;
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78 t = (LuanTable)obj;
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79 }
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80 return t.get(a[a.length-1]);
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81 }
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82
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83 public final Object set(String name,Object value) {
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84 String[] a = name.split("\\.");
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85 LuanTable t = loaded;
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86 for( int i=0; i<a.length-1; i++ ) {
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87 Object obj = t.get(a[i]);
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88 if( !(obj instanceof LuanTable) )
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89 return null;
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90 t = (LuanTable)obj;
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91 }
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92 return t.put(a[a.length-1],value);
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93 }
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94
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95 public final void load(String modName,LuanFunction loader) throws LuanException {
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96 preload.put(modName,loader);
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97 Object mod = PackageLib.require(this,modName);
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98 if( mod==null )
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99 throw new RuntimeException();
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100 global.put(modName,mod);
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101 }
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102
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103 public static LuanState newStandard() {
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104 try {
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105 LuanState luan = LuanCompiler.newLuanState();
124
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106 BasicLib.load(luan);
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107 PackageLib.load(luan);
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108 MathLib.load(luan);
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109 StringLib.load(luan);
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110 TableLib.load(luan);
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111 HtmlLib.load(luan);
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112 BinaryLib.load(luan);
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113 IoLib.load(luan);
126
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114 ThreadLib.load(luan);
119
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115 BasicLib.do_java_resource(luan,"luan/lib/init.luan");
124
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116 JavaLib.load(luan);
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117 return luan;
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118 } catch(LuanException e) {
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119 throw new RuntimeException(e);
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120 }
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121 }
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122
128
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123 public final Object eval(String cmd,String sourceName,boolean allowExpr) throws LuanException {
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124 LuanFunction fn = BasicLib.load(this,cmd,sourceName,true,allowExpr);
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125 return JAVA.call(fn,null);
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126 }
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127
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128
48
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129 public final LuanTable getMetatable(Object obj) {
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130 if( obj instanceof LuanTable ) {
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131 LuanTable table = (LuanTable)obj;
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132 return table.getMetatable();
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133 }
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134 for( MetatableGetter mg : mtGetters ) {
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135 LuanTable table = mg.getMetatable(obj);
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136 if( table != null )
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137 return table;
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138 }
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139 return null;
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140 }
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141
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142 public final void addMetatableGetter(MetatableGetter mg) {
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143 mtGetters.add(mg);
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144 }
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145
88
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146 public final LuanBit bit(LuanElement el) {
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147 return new LuanBit(this,el);
48
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148 }
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149
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150 public final Object getHandler(String op,Object obj) {
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151 LuanTable t = getMetatable(obj);
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152 return t==null ? null : t.get(op);
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153 }
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154
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155 }