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annotate src/luan/modules/BasicLuan.java @ 1802:ca98dee04e08 default tip

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add Parsers.json_null
author Franklin Schmidt <fschmidt@gmail.com>
date Sun, 21 Apr 2024 21:25:15 -0600
parents 04ac5f2771c8
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
167
4c0131c2b650 merge luan/lib into modules
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diff changeset
1 package luan.modules;
2
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2
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3 import java.io.InputStreamReader;
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4 import java.io.IOException;
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5 import java.lang.reflect.Method;
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6 import java.util.Iterator;
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7 import java.util.Map;
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8 import java.util.List;
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9 import java.util.ArrayList;
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10 import java.util.Arrays;
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11 import java.util.HashSet;
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12 import goodjava.json.JsonToString;
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13 import luan.Luan;
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14 import luan.LuanTable;
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15 import luan.LuanFunction;
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16 import luan.LuanException;
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17 import luan.LuanMutable;
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18 import luan.modules.parsers.LuanToString;
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20
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21 public final class BasicLuan {
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23 public static String type(Object obj) {
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24 return Luan.type(obj);
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25 }
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26
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27 public static LuanFunction load(Luan luan,String text,String sourceName,boolean persist,LuanTable env)
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28 throws LuanException
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29 {
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30 Utils.checkNotNull(text);
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31 Utils.checkNotNull(sourceName,1);
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32 return luan.load(text,sourceName,persist,env);
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33 }
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34 /*
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35 public static LuanFunction load_file(Luan luan,String fileName) throws LuanException {
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36 if( fileName == null ) {
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37 fileName = "stdin:";
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38 } else if( fileName.indexOf(':') == -1 ) {
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39 fileName = "file:" + fileName;
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40 }
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41 String src = PackageLuan.read(luan,fileName);
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42 if( src == null )
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43 return null;
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44 return load(luan,src,fileName,null);
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45 }
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46 */
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47 public static LuanFunction pairs(Luan luan,final LuanTable t) throws LuanException {
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48 Utils.checkNotNull(t);
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49 return t.pairs(luan);
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50 }
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51
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52 private static final class Ipairs extends LuanFunction implements LuanMutable {
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53 List<Object> list;
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54 int i = 0;
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55 final int size;
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56
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57 Ipairs(LuanTable t) {
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58 list = t.asList();
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59 size = list.size();
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60 }
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61
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62 @Override public Object[] call(Luan luan,Object[] args) throws LuanException {
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63 if( i >= size )
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64 return LuanFunction.NOTHING;
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65 try {
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66 Object val = list.get(i++);
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67 return new Object[]{i,val};
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68 } catch(IndexOutOfBoundsException e) {
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69 if( size != list.size() )
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70 throw new LuanException("list was modified during ipairs iteration");
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71 throw e;
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72 }
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73 }
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74
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75 @Override public boolean isImmutable() {
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76 return false;
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77 }
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78
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79 @Override public void makeImmutable() {
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80 throw new RuntimeException("ipairs cannot be made immutable");
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81 }
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82 }
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83
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84 public static LuanFunction ipairs(LuanTable t) throws LuanException {
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85 Utils.checkNotNull(t);
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86 return new Ipairs(t);
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87 }
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88
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89 public static Object get_metatable(LuanTable table) throws LuanException {
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90 Utils.checkNotNull(table);
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91 LuanTable metatable = table.getMetatable();
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92 if( metatable == null )
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93 return null;
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94 Object obj = metatable.rawGet("__metatable");
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95 return obj!=null ? obj : metatable;
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96 }
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97
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98 public static void set_metatable(Luan luan,LuanTable table,LuanTable metatable) throws LuanException {
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99 Utils.checkNotNull(table);
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100 if( table.getHandler(luan,"__metatable") != null )
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101 throw new LuanException("cannot change a protected metatable");
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102 table.setMetatable(metatable);
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103 }
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104
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105 public static boolean raw_equal(Object v1,Object v2) {
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106 return v1 == v2 || v1 != null && v1.equals(v2);
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107 }
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108
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109 public static Object raw_get(LuanTable table,Object index) {
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110 return table.rawGet(index);
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111 }
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112
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113 public static void raw_set(LuanTable table,Object index,Object value) throws LuanException {
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114 table.rawPut(index,value);
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115 }
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116
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117 public static int raw_len(Object v) throws LuanException {
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118 if( v instanceof String ) {
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119 String s = (String)v;
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120 return s.length();
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121 }
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122 if( v instanceof LuanTable ) {
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123 LuanTable t = (LuanTable)v;
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124 return t.rawLength();
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125 }
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126 throw new LuanException( "bad argument #1 to 'raw_len' (table or string expected)" );
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127 }
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128
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129 public static String to_string(Luan luan,Object v) throws LuanException {
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130 return luan.luanToString(v);
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131 }
41
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132
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133 public static LuanTable new_error(Luan luan,Object msg) throws LuanException {
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134 String s = luan.luanToString(msg);
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135 LuanTable tbl = new LuanException(s).table(luan);
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136 tbl.rawPut( "message", msg );
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137 return tbl;
41
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138 }
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139
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140 public static int assert_integer(int v) {
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141 return v;
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142 }
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143
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144 public static long assert_long(long v) {
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145 return v;
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146 }
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147
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148 public static double assert_double(double v) {
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149 return v;
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150 }
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151
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152 public static float assert_float(float v) {
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153 return v;
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154 }
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155
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156 public static LuanFunction range(final double from,final double to,Double stepV) throws LuanException {
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157 final double step = stepV==null ? 1.0 : stepV;
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158 if( step == 0.0 )
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159 throw new LuanException("bad argument #3 (step may not be zero)");
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160 return new LuanFunction() {
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161 double v = from;
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162
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163 @Override public Object call(Luan luan,Object[] args) {
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164 if( step > 0.0 && v > to || step < 0.0 && v < to )
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165 return LuanFunction.NOTHING;
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166 double rtn = v;
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167 v += step;
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168 return rtn;
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169 }
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170 };
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171 }
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172
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173 private static final class Values extends LuanFunction implements LuanMutable {
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174 Object[] args;
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175 int i = 0;
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176
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177 Values(Object[] args) {
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178 this.args = args;
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179 }
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180
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181 @Override public Object[] call(Luan luan,Object[] x) {
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182 if( i >= args.length )
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183 return LuanFunction.NOTHING;
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184 Object val = args[i++];
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185 return new Object[]{i,val};
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186 }
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187
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188 @Override public boolean isImmutable() {
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189 return false;
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190 }
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191
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192 @Override public void makeImmutable() {
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193 throw new RuntimeException("values cannot be made immutable");
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194 }
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195 }
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196
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197 public static LuanFunction values(final Object... args) throws LuanException {
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198 return new Values(args);
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199 }
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200
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201 private LuanFunction fn(Object obj) {
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202 return obj instanceof LuanFunction ? (LuanFunction)obj : null;
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203 }
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204
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205 public static String number_type(Number v) throws LuanException {
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206 Utils.checkNotNull(v);
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207 return v.getClass().getSimpleName().toLowerCase();
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208 }
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209
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210 public static int hash_code(Object obj) throws LuanException {
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211 if( obj == null ) {
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212 return 0;
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213 } else if( obj instanceof byte[] ) {
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214 return Arrays.hashCode((byte[])obj);
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215 } else {
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216 return obj.hashCode();
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217 }
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218 }
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219
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220 public static String stringify(Luan luan,Object obj,Object options) throws LuanException {
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221 if( options == null )
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222 return new LuanToString(luan).toString(obj);
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223 if( options instanceof LuanTable )
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224 return new LuanToString(luan,(LuanTable)options).toString(obj);
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225 if( options instanceof LuanFunction )
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226 return new LuanToString(luan,(LuanFunction)options).toString(obj);
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227 throw new LuanException("options must be table of function");
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228 }
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229
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230 public static final Object json_null = new Object();
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231
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232 public static String json_string(Object obj,LuanTable options) throws LuanException {
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233 JsonToString jts = new JsonToString();
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234 if( options != null ) {
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235 options = new LuanTable(options);
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diff changeset
236 Boolean compressed = Utils.removeBoolean(options,"compressed");
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237 if( compressed != null )
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238 jts.compressed = compressed;
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239 Utils.checkEmpty(options);
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240 }
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241 return jts.toString(Luan.toJava(obj,json_null));
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242 }
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243
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244 public static Object get_local_cloned(Luan luan,Object obj,Object key) {
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245 return luan.getLocalCloned(obj,key);
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246 }
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247
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248 public static void set_local_cloned(Luan luan,Object obj,Object key,Object value) {
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249 luan.setLocalCloned(obj,key,value);
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250 }
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251
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252 public static LuanFunction pairs_local_cloned(Luan luan,Object obj) throws LuanException {
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253 return luan.pairsLocalCloned(obj);
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254 }
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255
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256 public static Object get_local_only(Luan luan,Object obj,Object key) {
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257 return luan.getLocalOnly(obj,key);
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258 }
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259
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diff changeset
260 public static void set_local_only(Luan luan,Object obj,Object key,Object value) {
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261 luan.setLocalOnly(obj,key,value);
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262 }
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263
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diff changeset
264 public static LuanFunction pairs_local_only(Luan luan,Object obj) throws LuanException {
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265 return luan.pairsLocalOnly(obj);
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266 }
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267
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diff changeset
268 public static boolean is_immutable(LuanMutable m) {
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269 return m.isImmutable();
c922446f53aa immutable threading
Franklin Schmidt <fschmidt@gmail.com>
parents: 1563
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270 }
c922446f53aa immutable threading
Franklin Schmidt <fschmidt@gmail.com>
parents: 1563
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271
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f41919741100 fix security
Franklin Schmidt <fschmidt@gmail.com>
parents: 1316
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272 private void BasicLuan() {} // never
2
4da26b11d12a start interp
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
parents:
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273 }