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annotate src/luan/LuanState.java @ 168:ebe9db183eb7

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rename *Lib.java to *Luan.java git-svn-id: https://luan-java.googlecode.com/svn/trunk@169 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Sun, 22 Jun 2014 04:42:07 +0000
parents 4c0131c2b650
children
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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.impl.LuanCompiler;
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10 import luan.modules.BasicLuan;
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11 import luan.modules.PackageLuan;
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14 public abstract class LuanState implements DeepCloneable<LuanState> {
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15 private final LuanBit JAVA = bit(LuanElement.JAVA);
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16
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17 public LuanException exception(Object msg) {
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18 return JAVA.exception(msg);
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19 }
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21 public Object call(LuanFunction fn) throws LuanException {
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22 return call(fn,null,LuanFunction.NOTHING);
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23 }
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24
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25 public Object call(LuanFunction fn,String fnName) throws LuanException {
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26 return call(fn,fnName,LuanFunction.NOTHING);
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27 }
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29 public Object call(LuanFunction fn,Object[] args) throws LuanException {
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30 return call(fn,null,args);
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31 }
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33 public Object call(LuanFunction fn,String fnName,Object[] args) throws LuanException {
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34 return JAVA.call(fn,fnName,args);
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35 }
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36
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37 public LuanFunction checkFunction(Object obj) throws LuanException {
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38 return JAVA.checkFunction(obj);
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39 }
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41 public String toString(Object obj) throws LuanException {
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42 return JAVA.toString(obj);
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43 }
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44
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45 public String repr(Object obj) throws LuanException {
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46 return JAVA.repr(obj);
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47 }
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49 public boolean isLessThan(Object o1,Object o2) throws LuanException {
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50 return JAVA.isLessThan(o1,o2);
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51 }
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55 private LuanTable global;
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56 private LuanTable loaded;
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57 private LuanTable preload;
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58 private LuanTable searchers;
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60 private final List<MetatableGetter> mtGetters;
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61 final List<StackTraceElement> stackTrace = new ArrayList<StackTraceElement>();
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63 protected LuanState() {
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64 global = new LuanTable();
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65 global.put("_G",global);
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66 global.put( "_VERSION", Luan.version );
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67 loaded = new LuanTable();
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68 preload = new LuanTable();
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69 searchers = new LuanTable();
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70 mtGetters = new ArrayList<MetatableGetter>();
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71 }
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73 protected LuanState(LuanState luan) {
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74 mtGetters = new ArrayList<MetatableGetter>(luan.mtGetters);
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75 }
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77 @Override public void deepenClone(LuanState clone,DeepCloner cloner) {
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78 clone.global = cloner.deepClone(global);
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79 clone.loaded = cloner.deepClone(loaded);
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80 clone.preload = cloner.deepClone(preload);
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81 clone.searchers = cloner.deepClone(searchers);
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82 }
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84 public abstract LuanTable currentEnvironment();
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86 public final LuanTable global() {
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87 return global;
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88 }
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90 public final LuanTable loaded() {
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91 return loaded;
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92 }
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94 public final LuanTable preload() {
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95 return preload;
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96 }
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98 public final LuanTable searchers() {
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99 return searchers;
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100 }
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101
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102 public final Object get(String name) {
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103 String[] a = name.split("\\.");
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104 LuanTable t = loaded;
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105 for( int i=0; i<a.length-1; i++ ) {
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106 Object obj = t.get(a[i]);
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107 if( !(obj instanceof LuanTable) )
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108 return null;
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109 t = (LuanTable)obj;
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110 }
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111 return t.get(a[a.length-1]);
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112 }
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113
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114 public final Object set(String name,Object value) {
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115 String[] a = name.split("\\.");
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116 LuanTable t = loaded;
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117 for( int i=0; i<a.length-1; i++ ) {
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118 Object obj = t.get(a[i]);
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119 if( !(obj instanceof LuanTable) )
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120 return null;
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121 t = (LuanTable)obj;
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122 }
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123 return t.put(a[a.length-1],value);
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124 }
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125
161
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126 public final void globalImport(String modName) throws LuanException {
168
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127 Object mod = PackageLuan.require(this,modName);
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128 global.put(modName,mod);
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129 }
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130
59
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131 public static LuanState newStandard() {
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132 try {
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133 LuanState luan = LuanCompiler.newLuanState();
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134 luan.globalImport("Package");
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135 BasicLuan.do_file(luan,"java:luan/init.luan");
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136 return luan;
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137 } catch(LuanException e) {
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138 throw new RuntimeException(e);
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139 }
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140 }
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141
140
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142 public final Object eval(String cmd) {
157
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143 return eval(cmd,new LuanTable());
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144 }
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145
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146 public final Object eval(String cmd,LuanTable env) {
140
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147 try {
168
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148 LuanFunction fn = BasicLuan.load(this,cmd,"eval",env,true);
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149 return call(fn);
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150 } catch(LuanException e) {
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151 throw new RuntimeException(e);
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152 }
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153 }
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154
48
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155 public final LuanTable getMetatable(Object obj) {
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156 if( obj instanceof LuanTable ) {
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157 LuanTable table = (LuanTable)obj;
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158 return table.getMetatable();
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159 }
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160 for( MetatableGetter mg : mtGetters ) {
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161 LuanTable table = mg.getMetatable(obj);
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162 if( table != null )
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163 return table;
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164 }
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165 return null;
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166 }
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167
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168 public final void addMetatableGetter(MetatableGetter mg) {
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169 mtGetters.add(mg);
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170 }
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171
88
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172 public final LuanBit bit(LuanElement el) {
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173 return new LuanBit(this,el);
48
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174 }
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175
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176 public final Object getHandler(String op,Object obj) {
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177 LuanTable t = getMetatable(obj);
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178 return t==null ? null : t.get(op);
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179 }
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180
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181 }