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annotate src/luan/modules/BasicLuan.java @ 1520:d9a5405a3102

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try statement
author Franklin Schmidt <fschmidt@gmail.com>
date Sun, 21 Jun 2020 18:14:13 -0600
parents 56fb5cd8228d
children 0dc3be25ad20
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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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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 goodjava.json.JsonToString;
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12 import luan.Luan;
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13 import luan.LuanTable;
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14 import luan.LuanFunction;
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15 import luan.LuanException;
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16 import luan.LuanCloner;
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17 import luan.modules.parsers.LuanToString;
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19
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20 public final class BasicLuan {
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22 public static String type(Object obj) {
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23 return Luan.type(obj);
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24 }
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25
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26 public static LuanFunction load(Luan luan,String text,String sourceName,boolean persist,LuanTable env)
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27 throws LuanException
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28 {
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29 Utils.checkNotNull(text);
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30 Utils.checkNotNull(sourceName,1);
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31 return luan.load(text,sourceName,persist,env);
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32 }
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33 /*
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34 public static LuanFunction load_file(Luan luan,String fileName) throws LuanException {
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35 if( fileName == null ) {
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36 fileName = "stdin:";
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37 } else if( fileName.indexOf(':') == -1 ) {
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38 fileName = "file:" + fileName;
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39 }
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40 String src = PackageLuan.read(luan,fileName);
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41 if( src == null )
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42 return null;
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43 return load(luan,src,fileName,null);
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44 }
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45 */
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46 public static LuanFunction pairs(final LuanTable t) throws LuanException {
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47 Utils.checkNotNull(t);
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48 return t.pairs();
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49 }
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50
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51 private static class Ipairs extends LuanFunction {
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52 List<Object> list;
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53 int i = 0;
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54 final int size;
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55
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56 Ipairs(LuanTable t) {
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57 super(true);
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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(Object[] args) {
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63 if( i >= size )
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64 return LuanFunction.NOTHING;
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65 Object val = list.get(i++);
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66 return new Object[]{i,val};
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67 }
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68
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69 @Override protected void completeClone(LuanFunction dc,LuanCloner cloner) {
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70 Ipairs clone = (Ipairs)dc;
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71 clone.list = (List)cloner.clone(list);
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72 super.completeClone(dc,cloner);
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73 }
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74 }
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75
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76 public static LuanFunction ipairs(LuanTable t) throws LuanException {
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77 Utils.checkNotNull(t);
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78 return new Ipairs(t);
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79 }
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80
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81 public static Object get_metatable(LuanTable table) throws LuanException {
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82 Utils.checkNotNull(table);
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83 LuanTable metatable = table.getMetatable();
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84 if( metatable == null )
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85 return null;
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86 Object obj = metatable.rawGet("__metatable");
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87 return obj!=null ? obj : metatable;
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88 }
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89
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90 public static void set_metatable(LuanTable table,LuanTable metatable) throws LuanException {
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91 Utils.checkNotNull(table);
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92 if( table.getHandler("__metatable") != null )
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93 throw new LuanException("cannot change a protected metatable");
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94 table.setMetatable(metatable);
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95 }
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96
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97 public static boolean raw_equal(Object v1,Object v2) {
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98 return v1 == v2 || v1 != null && v1.equals(v2);
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99 }
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100
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101 public static Object raw_get(LuanTable table,Object index) {
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102 return table.rawGet(index);
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103 }
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104
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105 public static void raw_set(LuanTable table,Object index,Object value) throws LuanException {
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106 table.rawPut(index,value);
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107 }
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108
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109 public static int raw_len(Object v) throws LuanException {
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110 if( v instanceof String ) {
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111 String s = (String)v;
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112 return s.length();
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113 }
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114 if( v instanceof LuanTable ) {
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115 LuanTable t = (LuanTable)v;
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116 return t.rawLength();
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117 }
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118 throw new LuanException( "bad argument #1 to 'raw_len' (table or string expected)" );
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119 }
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120
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121 public static String to_string(Object v) throws LuanException {
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122 return Luan.luanToString(v);
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123 }
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124
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125 public static LuanTable new_error(Luan luan,Object msg) throws LuanException {
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126 String s = Luan.luanToString(msg);
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127 LuanTable tbl = new LuanException(s).table(luan);
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128 tbl.rawPut( "message", msg );
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129 return tbl;
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130 }
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131
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132 public static int assert_integer(int v) {
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133 return v;
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134 }
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135
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136 public static long assert_long(long v) {
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137 return v;
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138 }
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139
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140 public static double assert_double(double 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 float assert_float(float 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 LuanFunction range(final double from,final double to,Double stepV) throws LuanException {
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149 final double step = stepV==null ? 1.0 : stepV;
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150 if( step == 0.0 )
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151 throw new LuanException("bad argument #3 (step may not be zero)");
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152 return new LuanFunction(false) {
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153 double v = from;
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154
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155 @Override public Object call(Object[] args) {
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156 if( step > 0.0 && v > to || step < 0.0 && v < to )
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157 return LuanFunction.NOTHING;
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158 double rtn = v;
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159 v += step;
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160 return rtn;
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161 }
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162 };
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163 }
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164
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165 private static class Values extends LuanFunction {
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166 Object[] args;
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167 int i = 0;
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168
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169 Values(Object[] args) {
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170 super(true);
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171 this.args = args;
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172 }
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173
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174 @Override public Object[] call(Object[] x) {
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175 if( i >= args.length )
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176 return LuanFunction.NOTHING;
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177 Object val = args[i++];
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178 return new Object[]{i,val};
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179 }
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180
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181 @Override protected void completeClone(LuanFunction dc,LuanCloner cloner) {
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182 Values clone = (Values)dc;
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183 clone.args = (Object[])cloner.clone(args);
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184 super.completeClone(dc,cloner);
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185 }
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186 }
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187
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188 public static LuanFunction values(final Object... args) throws LuanException {
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189 return new Values(args);
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190 }
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191
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192 private LuanFunction fn(Object obj) {
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193 return obj instanceof LuanFunction ? (LuanFunction)obj : null;
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194 }
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195
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196 public static String number_type(Number v) throws LuanException {
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197 Utils.checkNotNull(v);
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198 return v.getClass().getSimpleName().toLowerCase();
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199 }
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200
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201 public static int hash_code(Object obj) throws LuanException {
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202 if( obj == null ) {
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203 return 0;
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204 } else if( obj instanceof byte[] ) {
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205 return Arrays.hashCode((byte[])obj);
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206 } else {
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207 return obj.hashCode();
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208 }
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209 }
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210
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211 public static String stringify(Object obj,LuanTable options) throws LuanException {
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212 LuanToString lts = new LuanToString();
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213 if( options != null ) {
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214 options = new LuanTable(options);
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215 Boolean strict = Utils.removeBoolean(options,"strict");
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216 if( strict != null )
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217 lts.strict = strict;
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218 Boolean numberTypes = Utils.removeBoolean(options,"number_types");
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219 if( numberTypes != null )
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220 lts.numberTypes = numberTypes;
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221 Boolean compressed = Utils.removeBoolean(options,"compressed");
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222 if( compressed != null )
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223 lts.compressed = compressed;
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224 Utils.checkEmpty(options);
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225 }
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226 return lts.toString(obj);
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227 }
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228
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229 public static String json_string(Object obj,LuanTable options) throws LuanException {
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230 JsonToString jts = new JsonToString();
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231 if( options != null ) {
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232 options = new LuanTable(options);
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233 Boolean compressed = Utils.removeBoolean(options,"compressed");
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234 if( compressed != null )
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235 jts.compressed = compressed;
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236 Utils.checkEmpty(options);
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237 }
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238 return jts.toString(Luan.toJava(obj));
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239 }
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240
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241 private void BasicLuan() {} // never
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242 }