Mercurial Hosting > luan
annotate src/luan/LuanState.java @ 108:3c404a296995
make Package module more standard;
return _ENV by default;
add "import" statement;
git-svn-id: https://luan-java.googlecode.com/svn/trunk@109 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Fri, 23 May 2014 03:21:54 +0000 |
parents | 1f8b6edc2b08 |
children | 2428ecfed375 |
rev | line source |
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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; |
48
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17 |
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18 |
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19 public abstract class LuanState implements DeepCloneable<LuanState> { |
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20 public final LuanBit JAVA = bit(LuanElement.JAVA); |
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21 |
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22 private LuanTable global; |
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23 private LuanTable loaded; |
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24 private LuanTable preload; |
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25 private LuanTable searchers; |
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26 |
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27 public InputStream in = System.in; |
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28 public PrintStream out = System.out; |
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29 public PrintStream err = System.err; |
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30 |
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31 private final List<MetatableGetter> mtGetters; |
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32 final List<StackTraceElement> stackTrace = new ArrayList<StackTraceElement>(); |
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33 |
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34 protected LuanState() { |
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35 global = new LuanTable(); |
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36 global.put("_G",global); |
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37 loaded = new LuanTable(); |
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38 preload = new LuanTable(); |
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39 searchers = new LuanTable(); |
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40 mtGetters = new ArrayList<MetatableGetter>(); |
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41 } |
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42 |
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43 protected LuanState(LuanState luan) { |
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44 mtGetters = new ArrayList<MetatableGetter>(luan.mtGetters); |
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45 } |
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46 |
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47 public final LuanState deepClone() { |
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48 return new DeepCloner().deepClone(this); |
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49 } |
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50 |
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51 @Override public void deepenClone(LuanState clone,DeepCloner cloner) { |
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52 clone.global = cloner.deepClone(global); |
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53 clone.loaded = cloner.deepClone(loaded); |
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54 clone.preload = cloner.deepClone(preload); |
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55 clone.searchers = cloner.deepClone(searchers); |
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56 } |
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57 |
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58 public abstract LuanTable currentEnvironment(); |
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59 |
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60 public final LuanTable global() { |
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61 return global; |
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62 } |
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63 |
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64 public final LuanTable loaded() { |
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65 return loaded; |
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66 } |
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67 |
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68 public final LuanTable preload() { |
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69 return preload; |
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70 } |
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71 |
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72 public final LuanTable searchers() { |
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73 return searchers; |
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74 } |
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75 |
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76 public final Object get(String name) { |
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77 String[] a = name.split("\\."); |
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78 LuanTable t = loaded; |
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79 for( int i=0; i<a.length-1; i++ ) { |
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80 Object obj = t.get(a[i]); |
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81 if( !(obj instanceof LuanTable) ) |
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82 return null; |
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83 t = (LuanTable)obj; |
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84 } |
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85 return t.get(a[a.length-1]); |
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86 } |
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87 |
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88 public final Object set(String name,Object value) { |
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89 String[] a = name.split("\\."); |
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90 LuanTable t = loaded; |
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91 for( int i=0; i<a.length-1; i++ ) { |
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92 Object obj = t.get(a[i]); |
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93 if( !(obj instanceof LuanTable) ) |
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94 return null; |
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95 t = (LuanTable)obj; |
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96 } |
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97 return t.put(a[a.length-1],value); |
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98 } |
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99 |
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100 public final void load(String modName,LuanFunction loader) throws LuanException { |
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101 preload.put(modName,loader); |
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102 Object mod = PackageLib.require(this,modName); |
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103 if( mod==null ) |
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104 throw new RuntimeException(); |
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105 global.put(modName,mod); |
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106 } |
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107 |
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108 public static LuanState newStandard() { |
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109 try { |
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110 LuanState luan = LuanCompiler.newLuanState(); |
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111 luan.load(BasicLib.NAME,BasicLib.LOADER); |
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112 luan.load(PackageLib.NAME,PackageLib.LOADER); |
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113 luan.load(JavaLib.NAME,JavaLib.LOADER); |
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114 luan.load(MathLib.NAME,MathLib.LOADER); |
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115 luan.load(StringLib.NAME,StringLib.LOADER); |
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116 luan.load(TableLib.NAME,TableLib.LOADER); |
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117 luan.load(HtmlLib.NAME,HtmlLib.LOADER); |
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118 return luan; |
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119 } catch(LuanException e) { |
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120 throw new RuntimeException(e); |
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121 } |
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122 } |
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123 |
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124 public final Object[] eval(String cmd,String sourceName,boolean interactive) throws LuanException { |
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125 LuanFunction fn = BasicLib.load(this,cmd,sourceName,interactive); |
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126 return JAVA.call(fn,null); |
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127 } |
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128 |
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129 |
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130 public final LuanTable getMetatable(Object obj) { |
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131 if( obj instanceof LuanTable ) { |
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132 LuanTable table = (LuanTable)obj; |
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133 return table.getMetatable(); |
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134 } |
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135 for( MetatableGetter mg : mtGetters ) { |
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136 LuanTable table = mg.getMetatable(obj); |
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137 if( table != null ) |
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138 return table; |
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139 } |
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140 return null; |
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141 } |
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142 |
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143 public final void addMetatableGetter(MetatableGetter mg) { |
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144 mtGetters.add(mg); |
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145 } |
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146 |
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147 public final LuanBit bit(LuanElement el) { |
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148 return new LuanBit(this,el); |
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149 } |
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150 |
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151 public final Object getHandler(String op,Object obj) { |
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152 LuanTable t = getMetatable(obj); |
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153 return t==null ? null : t.get(op); |
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154 } |
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155 |
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156 } |