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annotate core/src/luan/LuanState.java @ 398:39c4ac11a58a

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add LuanState.require()
author Franklin Schmidt <fschmidt@gmail.com>
date Mon, 27 Apr 2015 12:44:53 -0600
parents fed1893821bf
children 8f1be9704726
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1 package luan;
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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 java.util.Set;
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10 import java.util.HashSet;
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11 import luan.impl.LuanCompiler;
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12 import luan.modules.BasicLuan;
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13 import luan.modules.PackageLuan;
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14 import luan.modules.JavaLuan;
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15 import luan.modules.StringLuan;
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16 import luan.modules.BinaryLuan;
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19 public abstract class LuanState implements DeepCloneable<LuanState> {
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21 final List<StackTraceElement> stackTrace = new ArrayList<StackTraceElement>();
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23 private LuanTableImpl registry;
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24 private LuanTableImpl metatable; // generic metatable
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26 protected LuanState() {
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27 registry = new LuanTableImpl();
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28 metatable = newMetatable();
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29 }
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31 protected LuanState(LuanState luan) {}
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33 @Override public void deepenClone(LuanState clone,DeepCloner cloner) {
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34 clone.registry = cloner.deepClone(registry);
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35 clone.metatable = cloner.deepClone(metatable);
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36 }
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38 public abstract LuanTable currentEnvironment();
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39 public abstract LuanSource currentSource();
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41 public final LuanTable registry() {
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42 return registry;
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43 }
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45 public final Object require(String modName) throws LuanException {
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46 return PackageLuan.require(this,modName);
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47 }
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49 public static LuanState newStandard() {
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50 try {
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51 LuanState luan = LuanCompiler.newLuanState();
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52 luan.require("luan:Luan");
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53 luan.require("luan:Io");
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54 return luan;
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55 } catch(LuanException e) {
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56 throw new RuntimeException(e);
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57 }
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58 }
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60 public final Object eval(String cmd) throws LuanException {
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61 return eval(cmd,new LuanTableImpl());
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62 }
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64 public final Object eval(String cmd,LuanTable env) throws LuanException {
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65 LuanFunction fn = BasicLuan.load(this,cmd,"eval",env,true);
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66 return call(fn);
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67 }
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69 public final LuanTable getMetatable(Object obj) {
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70 if( obj==null )
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71 return null;
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72 if( obj instanceof LuanTable ) {
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73 LuanTable table = (LuanTable)obj;
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74 return table.getMetatable();
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75 }
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76 return metatable;
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77 }
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79 public final LuanBit bit(LuanElement el) {
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80 return new LuanBit(this,el);
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81 }
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83 public final Object getHandler(String op,Object obj) {
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84 LuanTable t = getMetatable(obj);
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85 return t==null ? null : t.get(op);
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86 }
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88 public final Object getHandler(String op,LuanTable table) {
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89 LuanTable t = table.getMetatable();
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90 return t==null ? null : t.get(op);
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91 }
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93 private static LuanTableImpl newMetatable() {
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94 LuanTableImpl metatable = new LuanTableImpl();
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95 try {
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96 metatable.put( "__index", new LuanJavaFunction(
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97 LuanState.class.getMethod("__index",LuanState.class,Object.class,Object.class), null
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98 ) );
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99 metatable.put( "__newindex", new LuanJavaFunction(
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100 LuanState.class.getMethod("__newindex",LuanState.class,Object.class,Object.class,Object.class), null
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101 ) );
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102 } catch(NoSuchMethodException e) {
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103 throw new RuntimeException(e);
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104 }
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105 return metatable;
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106 }
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107
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108 public static Object __index(LuanState luan,Object obj,Object key) throws LuanException {
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109 if( obj instanceof String ) {
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110 Object rtn = StringLuan.__index(luan,(String)obj,key);
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111 if( rtn != null )
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112 return rtn;
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113 }
305
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114 if( obj instanceof byte[] ) {
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115 Object rtn = BinaryLuan.__index(luan,(byte[])obj,key);
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116 if( rtn != null )
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117 return rtn;
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118 }
208
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119 return JavaLuan.__index(luan,obj,key);
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120 }
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121
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122 public static void __newindex(LuanState luan,Object obj,Object key,Object value) throws LuanException {
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123 JavaLuan.__newindex(luan,obj,key,value);
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124 }
199
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125
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126 // convenience methods
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127
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128 private final LuanBit JAVA = bit(LuanElement.JAVA);
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129
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130 public LuanException exception(Object msg) {
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131 return JAVA.exception(msg);
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132 }
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133
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134 public Object call(LuanFunction fn) throws LuanException {
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135 return call(fn,null,LuanFunction.NOTHING);
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136 }
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137
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138 public Object call(LuanFunction fn,String fnName) throws LuanException {
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139 return call(fn,fnName,LuanFunction.NOTHING);
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140 }
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141
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142 public Object call(LuanFunction fn,Object[] args) throws LuanException {
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143 return call(fn,null,args);
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144 }
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145
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146 public Object call(LuanFunction fn,String fnName,Object[] args) throws LuanException {
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147 return JAVA.call(fn,fnName,args);
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148 }
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149
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150 public LuanFunction checkFunction(Object obj) throws LuanException {
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151 return JAVA.checkFunction(obj);
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152 }
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153
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154 public String toString(Object obj) throws LuanException {
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155 return JAVA.toString(obj);
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156 }
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157
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158 public String repr(Object obj) throws LuanException {
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159 return JAVA.repr(obj);
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160 }
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161
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162 public boolean isLessThan(Object o1,Object o2) throws LuanException {
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163 return JAVA.isLessThan(o1,o2);
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164 }
48
64ecb7a3aad7 rename Lua to Luan
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165 }