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annotate core/src/luan/LuanState.java @ 199:8960c81eb4bc

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minor git-svn-id: https://luan-java.googlecode.com/svn/trunk@200 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Thu, 03 Jul 2014 21:37:47 +0000
parents 24ede40ee0aa
children 9fb218211763
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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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16 final List<StackTraceElement> stackTrace = new ArrayList<StackTraceElement>();
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18 private LuanTable global;
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19 private LuanTable loaded;
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20 private LuanTable preload;
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21 private LuanTable searchers;
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22
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23 protected LuanState() {
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24 global = new LuanTable();
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25 global.put("_G",global);
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26 loaded = new LuanTable();
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27 preload = new LuanTable();
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28 searchers = new LuanTable();
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29 }
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31 @Override public void deepenClone(LuanState clone,DeepCloner cloner) {
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32 clone.global = cloner.deepClone(global);
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33 clone.loaded = cloner.deepClone(loaded);
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34 clone.preload = cloner.deepClone(preload);
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35 clone.searchers = cloner.deepClone(searchers);
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36 }
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38 public abstract LuanTable currentEnvironment();
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40 public final LuanTable global() {
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41 return global;
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42 }
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44 public final LuanTable loaded() {
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45 return loaded;
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46 }
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47
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48 public final LuanTable preload() {
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49 return preload;
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50 }
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52 public final LuanTable searchers() {
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53 return searchers;
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54 }
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56 public final Object get(String name) {
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57 String[] a = name.split("\\.");
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58 LuanTable t = loaded;
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59 for( int i=0; i<a.length-1; i++ ) {
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60 Object obj = t.get(a[i]);
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61 if( !(obj instanceof LuanTable) )
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62 return null;
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63 t = (LuanTable)obj;
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64 }
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65 return t.get(a[a.length-1]);
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66 }
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67
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68 public final Object set(String name,Object value) {
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69 String[] a = name.split("\\.");
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70 LuanTable t = loaded;
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71 for( int i=0; i<a.length-1; i++ ) {
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72 Object obj = t.get(a[i]);
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73 if( !(obj instanceof LuanTable) )
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74 return null;
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75 t = (LuanTable)obj;
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76 }
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77 return t.put(a[a.length-1],value);
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78 }
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79
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80 public static LuanState newStandard() {
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81 try {
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82 LuanState luan = LuanCompiler.newLuanState();
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83 BasicLuan.do_file(luan,"java:luan/init.luan");
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84 return luan;
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85 } catch(LuanException e) {
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86 throw new RuntimeException(e);
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87 }
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88 }
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89
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90 public final Object eval(String cmd) {
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91 return eval(cmd,new LuanTable());
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92 }
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94 public final Object eval(String cmd,LuanTable env) {
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95 try {
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96 LuanFunction fn = BasicLuan.load(this,cmd,"eval",env,true);
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97 return call(fn);
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98 } catch(LuanException e) {
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99 throw new RuntimeException(e);
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100 }
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101 }
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102
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103 public final LuanTable getMetatable(Object obj) {
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104 return getMetatable(obj,null);
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105 }
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106
195
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107 public abstract LuanTable getMetatable(Object obj,MetatableGetter beforeThis);
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108
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109 public abstract void addMetatableGetter(MetatableGetter mg);
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110
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111 public final LuanBit bit(LuanElement el) {
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112 return new LuanBit(this,el);
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113 }
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114
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115 public final Object getHandler(String op,Object obj) {
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116 LuanTable t = getMetatable(obj);
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117 return t==null ? null : t.get(op);
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118 }
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119
199
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120
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121 // convenience methods
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122
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123 private final LuanBit JAVA = bit(LuanElement.JAVA);
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124
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125 public LuanException exception(Object msg) {
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126 return JAVA.exception(msg);
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127 }
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128
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129 public Object call(LuanFunction fn) throws LuanException {
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130 return call(fn,null,LuanFunction.NOTHING);
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131 }
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132
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133 public Object call(LuanFunction fn,String fnName) throws LuanException {
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134 return call(fn,fnName,LuanFunction.NOTHING);
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135 }
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136
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137 public Object call(LuanFunction fn,Object[] args) throws LuanException {
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138 return call(fn,null,args);
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139 }
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140
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141 public Object call(LuanFunction fn,String fnName,Object[] args) throws LuanException {
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142 return JAVA.call(fn,fnName,args);
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143 }
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144
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145 public LuanFunction checkFunction(Object obj) throws LuanException {
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146 return JAVA.checkFunction(obj);
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147 }
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148
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149 public String toString(Object obj) throws LuanException {
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150 return JAVA.toString(obj);
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151 }
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152
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153 public String repr(Object obj) throws LuanException {
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154 return JAVA.repr(obj);
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155 }
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156
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157 public boolean isLessThan(Object o1,Object o2) throws LuanException {
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158 return JAVA.isLessThan(o1,o2);
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159 }
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160 }