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annotate src/luan/Luan.java @ 1393:cc0dbca576dc

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better logging
author Franklin Schmidt <fschmidt@gmail.com>
date Fri, 06 Sep 2019 05:09:56 -0600
parents 8b61c8c4e07a
children ef1620aa99cb
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1
2df768b926aa start Luan
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1 package luan;
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2
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3 import java.lang.reflect.Array;
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4 import java.io.Closeable;
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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.HashMap;
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9 import java.util.LinkedHashMap;
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10 import java.util.Iterator;
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11 import java.util.Arrays;
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12 import java.util.Set;
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13 import luan.lib.logging.Logger;
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14 import luan.lib.logging.LoggerFactory;
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15 import luan.modules.BasicLuan;
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16 import luan.modules.JavaLuan;
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17 import luan.modules.PackageLuan;
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18 import luan.modules.logging.LuanLogger;
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19 import luan.impl.LuanCompiler;
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2df768b926aa start Luan
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21
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22 public final class Luan implements LuanCloneable {
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23 private static final Logger logger = LoggerFactory.getLogger(Luan.class);
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24
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25 private final List<LuanClosure> stack = new ArrayList<LuanClosure>();
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26 private Map registry;
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27 private boolean isLocked = false;
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28
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29 public interface OnClose extends Closeable {
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30 public void onClose(Closeable c);
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31 }
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32 public OnClose onClose;
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33
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34 public Luan() {
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35 registry = new HashMap();
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36 }
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37
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38 private Luan(Luan luan) {}
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39
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40 @Override public Luan shallowClone() {
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41 return new Luan(this);
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42 }
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43
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44 @Override public void deepenClone(LuanCloneable dc,LuanCloner cloner) {
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45 Luan clone = (Luan)dc;
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46 clone.registry = cloner.clone(registry);
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47 if( cloner.type == LuanCloner.Type.INCREMENTAL )
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48 isLocked = true;
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49 }
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50
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51 public LuanClosure peek() {
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52 return peek(1);
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53 }
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54
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55 public LuanClosure peek(int i) {
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56 int n = stack.size();
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57 return n < i ? null : stack.get(n-i);
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58 }
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59
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60 void push(LuanClosure closure) {
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61 if( isLocked )
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62 throw new RuntimeException(this+" is locked "+closure);
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63 stack.add(closure);
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64 }
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65
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66 void pop() {
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67 stack.remove(stack.size()-1);
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68 }
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69
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70 public Map registry() {
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71 return registry;
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72 }
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73
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74 public void onClose(Closeable c) {
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75 if( onClose != null )
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76 onClose.onClose(c);
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77 }
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78
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79 public Object eval(String cmd,Object... args) throws LuanException {
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80 return load(cmd,"eval").call(args);
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81 }
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82
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83 public Object require(String modName) throws LuanException {
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84 return PackageLuan.require(this,modName);
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85 }
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86
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87 public static String luanToString(Object obj) throws LuanException {
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88 if( obj instanceof LuanTable ) {
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89 LuanTable tbl = (LuanTable)obj;
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90 return tbl.toStringLuan();
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91 }
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92 if( obj == null )
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93 return "nil";
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94 if( obj instanceof Number )
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95 return Luan.toString((Number)obj);
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96 if( obj instanceof byte[] )
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97 return "binary: " + Integer.toHexString(obj.hashCode());
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98 return obj.toString();
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99 }
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100
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101 public Object index(Object obj,Object key) throws LuanException {
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102 if( obj instanceof LuanTable ) {
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103 LuanTable tbl = (LuanTable)obj;
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104 return tbl.get(key);
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105 }
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106 if( obj != null && peek().javaOk )
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107 return JavaLuan.__index(this,obj,key);
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108 throw new LuanException("attempt to index a " + Luan.type(obj) + " value" );
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109 }
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110
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111
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112 public static boolean isLessThan(Object o1,Object o2) throws LuanException {
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113 if( o1 instanceof Number && o2 instanceof Number ) {
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114 Number n1 = (Number)o1;
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115 Number n2 = (Number)o2;
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116 return n1.doubleValue() < n2.doubleValue();
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117 }
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118 if( o1 instanceof String && o2 instanceof String ) {
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119 String s1 = (String)o1;
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120 String s2 = (String)o2;
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121 return s1.compareTo(s2) < 0;
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122 }
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123 LuanFunction fn = getBinHandler("__lt",o1,o2);
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124 if( fn != null )
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125 return Luan.checkBoolean( Luan.first(fn.call(o1,o2)) );
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126 throw new LuanException( "attempt to compare " + Luan.type(o1) + " with " + Luan.type(o2) );
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127 }
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128
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129 public static LuanFunction getBinHandler(String op,Object o1,Object o2) throws LuanException {
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130 if( o1 instanceof LuanTable ) {
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131 LuanFunction f1 = getHandlerFunction(op,(LuanTable)o1);
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132 if( f1 != null )
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133 return f1;
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134 }
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135 return o2 instanceof LuanTable ? getHandlerFunction(op,(LuanTable)o2) : null;
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136 }
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137
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138 public static LuanFunction getHandlerFunction(String op,LuanTable t) throws LuanException {
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139 Object f = t.getHandler(op);
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140 if( f == null )
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141 return null;
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142 return Luan.checkFunction(f);
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143 }
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144
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145 public LuanTable toTable(Object obj) {
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146 if( obj == null )
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147 return null;
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148 if( obj instanceof LuanTable )
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149 return (LuanTable)obj;
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150 if( obj instanceof List ) {
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151 return new LuanTable(this,(List)obj);
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152 }
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153 if( obj instanceof Map ) {
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154 return new LuanTable(this,(Map)obj);
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155 }
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156 if( obj instanceof Set ) {
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157 return new LuanTable(this,(Set)obj);
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158 }
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159 Class cls = obj.getClass();
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160 if( cls.isArray() ) {
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161 if( cls.getComponentType().isPrimitive() ) {
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diff changeset
162 int len = Array.getLength(obj);
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163 List list = new ArrayList();
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164 for( int i=0; i<len; i++ ) {
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165 list.add(Array.get(obj,i));
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166 }
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167 return new LuanTable(this,list);
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168 } else {
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169 Object[] a = (Object[])obj;
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170 return new LuanTable(this,Arrays.asList(a));
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171 }
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172 }
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173 return null;
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174 }
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175
1393
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176 public Logger getLogger(Class cls) {
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177 return LuanLogger.getLogger(this,cls);
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178 }
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179
1333
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180
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181
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diff changeset
182 // static
1
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183
481
5d4a78c93383 luan errors are now tables
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184 public static void main(String[] args) throws LuanException {
1242
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185 doFile( "classpath:luan/cmd_line.luan", args );
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186 }
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187
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188 public static void doFile(String uri,String... args) throws LuanException {
1333
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189 Luan luan = new Luan();
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190 LuanFunction fn = (LuanFunction)BasicLuan.load_file(luan,uri);
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191 fn.call((Object[])args);
134
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parents: 113
diff changeset
192 }
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diff changeset
193
111
2428ecfed375 change LuanFunction.call() from returning Object[] to returning Object, to reduce garbage collection
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diff changeset
194 public static Object first(Object obj) {
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diff changeset
195 if( !(obj instanceof Object[]) )
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diff changeset
196 return obj;
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diff changeset
197 Object[] a = (Object[])obj;
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diff changeset
198 return a.length==0 ? null : a[0];
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199 }
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200
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diff changeset
201 public static Object[] array(Object obj) {
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202 return obj instanceof Object[] ? (Object[])obj : new Object[]{obj};
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parents: 105
diff changeset
203 }
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204
1
2df768b926aa start Luan
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205 public static String type(Object obj) {
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206 if( obj == null )
105
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diff changeset
207 return "nil";
1
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208 if( obj instanceof String )
105
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diff changeset
209 return "string";
1
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210 if( obj instanceof Boolean )
105
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diff changeset
211 return "boolean";
46
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212 if( obj instanceof Number )
105
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diff changeset
213 return "number";
85
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214 if( obj instanceof LuanTable )
105
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diff changeset
215 return "table";
85
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diff changeset
216 if( obj instanceof LuanFunction )
105
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diff changeset
217 return "function";
113
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diff changeset
218 if( obj instanceof byte[] )
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219 return "binary";
513
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220 return "java";
1
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221 }
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222
46
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diff changeset
223 public static String toString(Number n) {
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224 if( n instanceof Integer )
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diff changeset
225 return n.toString();
255
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parents: 226
diff changeset
226 int i = n.intValue();
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diff changeset
227 if( i == n.doubleValue() )
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diff changeset
228 return Integer.toString(i);
46
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diff changeset
229 String s = n.toString();
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diff changeset
230 int iE = s.indexOf('E');
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diff changeset
231 String ending = null;
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diff changeset
232 if( iE != -1 ) {
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diff changeset
233 ending = s.substring(iE);
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diff changeset
234 s = s.substring(0,iE);
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diff changeset
235 }
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diff changeset
236 if( s.endsWith(".0") )
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diff changeset
237 s = s.substring(0,s.length()-2);
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diff changeset
238 if( ending != null )
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diff changeset
239 s += ending;
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diff changeset
240 return s;
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diff changeset
241 }
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242
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diff changeset
243 public static Integer asInteger(Object obj) {
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diff changeset
244 if( obj instanceof Integer )
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diff changeset
245 return (Integer)obj;
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diff changeset
246 if( !(obj instanceof Number) )
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diff changeset
247 return null;
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diff changeset
248 Number n = (Number)obj;
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diff changeset
249 int i = n.intValue();
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diff changeset
250 return i==n.doubleValue() ? Integer.valueOf(i) : null;
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diff changeset
251 }
66
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diff changeset
252
88
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diff changeset
253 public static String stringEncode(String s) {
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diff changeset
254 s = s.replace("\\","\\\\");
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diff changeset
255 s = s.replace("\u0007","\\a");
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diff changeset
256 s = s.replace("\b","\\b");
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diff changeset
257 s = s.replace("\f","\\f");
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diff changeset
258 s = s.replace("\n","\\n");
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diff changeset
259 s = s.replace("\r","\\r");
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diff changeset
260 s = s.replace("\t","\\t");
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diff changeset
261 s = s.replace("\u000b","\\v");
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diff changeset
262 s = s.replace("\"","\\\"");
420
e9d4d5854e54 add String.encode
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diff changeset
263 s = s.replace("\'","\\'");
88
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diff changeset
264 return s;
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diff changeset
265 }
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diff changeset
266
647
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parents: 574
diff changeset
267
8e8c30b72e9b move methods from LuanState to Luan
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parents: 574
diff changeset
268 public static Boolean checkBoolean(Object obj) throws LuanException {
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parents: 574
diff changeset
269 if( obj instanceof Boolean )
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parents: 574
diff changeset
270 return (Boolean)obj;
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diff changeset
271 throw new LuanException("attempt to use a " + Luan.type(obj) + " value as a boolean" );
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272 }
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273
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274 public static String checkString(Object obj) throws LuanException {
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275 if( obj instanceof String )
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276 return (String)obj;
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277 throw new LuanException("attempt to use a " + Luan.type(obj) + " value as a string" );
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278 }
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279
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280 public static LuanFunction checkFunction(Object obj) throws LuanException {
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281 if( obj instanceof LuanFunction )
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282 return (LuanFunction)obj;
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283 throw new LuanException("attempt to call a " + Luan.type(obj) + " value" );
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284 }
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285
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286 public LuanFunction load(String text,String sourceName,LuanTable env)
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287 throws LuanException
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288 {
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289 return LuanCompiler.compile(this,text,sourceName,env);
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290 }
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291
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292 public LuanFunction load(String text,String sourceName)
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293 throws LuanException
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294 {
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295 return load(text,sourceName,null);
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296 }
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297
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298 public static Object toJava(Object obj) throws LuanException {
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299 if( !(obj instanceof LuanTable) )
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300 return obj;
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301 LuanTable tbl = (LuanTable)obj;
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302 if( tbl.isList() ) {
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303 List list = new ArrayList();
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304 for( Object el : tbl.asList() ) {
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305 list.add( toJava(el) );
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306 }
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307 return list;
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308 } else {
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309 Map map = new LinkedHashMap();
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310 Iterator<Map.Entry> iter = tbl.rawIterator();
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311 while( iter.hasNext() ) {
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312 Map.Entry entry = iter.next();
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313 map.put( toJava(entry.getKey()), toJava(entry.getValue()) );
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314 }
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315 return map;
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316 }
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317 }
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318
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319
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320 // security
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321
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322 public interface Security {
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323 public void check(Luan luan,LuanClosure closure,String op,Object... args) throws LuanException;
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324 }
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325
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326 private static String SECURITY_KEY = "Luan.Security";
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327
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328 public static void checkSecurity(Luan luan,String op,Object... args) throws LuanException {
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329 check(luan,1,op,args);
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330 }
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331
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332 public static void checkCallerSecurity(Luan luan,String op,Object... args) throws LuanException {
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333 check(luan,2,op,args);
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334 }
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335
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336 private static void check(Luan luan,int i,String op,Object... args) throws LuanException {
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337 Security s = (Security)luan.registry().get(SECURITY_KEY);
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338 if( s!=null )
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339 s.check(luan,luan.peek(),op,args);
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340 }
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341
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342 public static Security setSecurity(Luan luan,Security s) {
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343 return (Security)luan.registry().put(SECURITY_KEY,s);
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344 }
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345
1
2df768b926aa start Luan
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346 }