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annotate src/luan/Luan.java @ 1164:1f9d34a6f308

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remove assertions
author Franklin Schmidt <fschmidt@gmail.com>
date Wed, 07 Feb 2018 17:36:38 -0700
parents 22652f4020fb
children 7ef40e1923b7
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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2df768b926aa start Luan
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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1 package luan;
2df768b926aa start Luan
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2
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3 import java.util.List;
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4 import java.util.ArrayList;
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5 import java.util.Map;
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6 import java.util.LinkedHashMap;
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7 import java.util.Set;
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8 import java.util.Arrays;
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9 import java.util.Iterator;
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ebe9db183eb7 rename *Lib.java to *Luan.java
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10 import luan.modules.BasicLuan;
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11 import luan.modules.Utils;
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b620b8e1010f remove Luan.load() allow_expression param and add Luan.eval()
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12 import luan.impl.LuanCompiler;
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2df768b926aa start Luan
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14
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15 public final class Luan {
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2df768b926aa start Luan
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16
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17 public static void main(String[] args) throws LuanException {
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18 LuanState luan = new LuanState();
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ca169567ce07 module URIs must now include ".luan"
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19 LuanFunction standalone = (LuanFunction)BasicLuan.load_file(luan,"classpath:luan/cmd_line.luan");
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20 standalone.call(luan,args);
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21 }
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22
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23 public static Object first(Object obj) {
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24 if( !(obj instanceof Object[]) )
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25 return obj;
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26 Object[] a = (Object[])obj;
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27 return a.length==0 ? null : a[0];
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28 }
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2428ecfed375 change LuanFunction.call() from returning Object[] to returning Object, to reduce garbage collection
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30 public static Object[] array(Object obj) {
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31 return obj instanceof Object[] ? (Object[])obj : new Object[]{obj};
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32 }
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34 public static String type(Object obj) {
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35 if( obj == null )
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36 return "nil";
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2df768b926aa start Luan
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37 if( obj instanceof String )
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38 return "string";
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2df768b926aa start Luan
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39 if( obj instanceof Boolean )
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40 return "boolean";
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41 if( obj instanceof Number )
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42 return "number";
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43 if( obj instanceof LuanTable )
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44 return "table";
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45 if( obj instanceof LuanFunction )
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46 return "function";
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47 if( obj instanceof byte[] )
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48 return "binary";
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49 return "java";
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50 }
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52 public static String toString(Number n) {
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53 if( n instanceof Integer )
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54 return n.toString();
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55 int i = n.intValue();
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56 if( i == n.doubleValue() )
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57 return Integer.toString(i);
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58 String s = n.toString();
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59 int iE = s.indexOf('E');
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60 String ending = null;
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61 if( iE != -1 ) {
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62 ending = s.substring(iE);
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63 s = s.substring(0,iE);
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64 }
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65 if( s.endsWith(".0") )
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66 s = s.substring(0,s.length()-2);
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67 if( ending != null )
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68 s += ending;
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69 return s;
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70 }
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72 public static Integer asInteger(Object obj) {
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73 if( obj instanceof Integer )
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74 return (Integer)obj;
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75 if( !(obj instanceof Number) )
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76 return null;
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77 Number n = (Number)obj;
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78 int i = n.intValue();
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79 return i==n.doubleValue() ? Integer.valueOf(i) : null;
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80 }
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81
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82 public static String stringEncode(String s) {
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83 s = s.replace("\\","\\\\");
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84 s = s.replace("\u0007","\\a");
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85 s = s.replace("\b","\\b");
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86 s = s.replace("\f","\\f");
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87 s = s.replace("\n","\\n");
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88 s = s.replace("\r","\\r");
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89 s = s.replace("\t","\\t");
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90 s = s.replace("\u000b","\\v");
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91 s = s.replace("\"","\\\"");
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92 s = s.replace("\'","\\'");
88
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93 return s;
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94 }
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95
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96
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97 // from LuanState
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98
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99 public static Boolean checkBoolean(Object obj) throws LuanException {
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100 if( obj instanceof Boolean )
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101 return (Boolean)obj;
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102 throw new LuanException("attempt to use a " + Luan.type(obj) + " value as a boolean" );
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103 }
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104
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105 public static String checkString(Object obj) throws LuanException {
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106 if( obj instanceof String )
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107 return (String)obj;
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108 throw new LuanException("attempt to use a " + Luan.type(obj) + " value as a string" );
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109 }
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110
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111 public static LuanFunction checkFunction(Object obj) throws LuanException {
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112 if( obj instanceof LuanFunction )
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113 return (LuanFunction)obj;
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114 throw new LuanException("attempt to call a " + Luan.type(obj) + " value" );
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115 }
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116
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117 public static boolean isLessThan(LuanState luan,Object o1,Object o2) throws LuanException {
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118 if( o1 instanceof Number && o2 instanceof Number ) {
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119 Number n1 = (Number)o1;
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120 Number n2 = (Number)o2;
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121 return n1.doubleValue() < n2.doubleValue();
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122 }
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123 if( o1 instanceof String && o2 instanceof String ) {
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124 String s1 = (String)o1;
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125 String s2 = (String)o2;
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126 return s1.compareTo(s2) < 0;
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127 }
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128 LuanFunction fn = getBinHandler("__lt",o1,o2);
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129 if( fn != null )
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130 return checkBoolean( Luan.first(fn.call(luan,new Object[]{o1,o2})) );
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131 throw new LuanException( "attempt to compare " + Luan.type(o1) + " with " + Luan.type(o2) );
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132 }
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133
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134 public static LuanFunction getBinHandler(String op,Object o1,Object o2) throws LuanException {
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135 if( o1 instanceof LuanTable ) {
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136 LuanFunction f1 = getHandlerFunction(op,(LuanTable)o1);
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137 if( f1 != null )
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138 return f1;
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139 }
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140 return o2 instanceof LuanTable ? getHandlerFunction(op,(LuanTable)o2) : null;
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141 }
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142
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143 public static LuanFunction getHandlerFunction(String op,LuanTable t) throws LuanException {
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144 Object f = t.getHandler(op);
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145 if( f == null )
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146 return null;
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147 return checkFunction(f);
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148 }
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149
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150 public static LuanFunction load(String text,String sourceName,LuanTable env)
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151 throws LuanException
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152 {
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153 return LuanCompiler.compile(text,sourceName,env);
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154 }
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155
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156 public static LuanFunction load(String text,String sourceName)
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157 throws LuanException
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158 {
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159 return load(text,sourceName,null);
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160 }
647
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161
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162
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163 public static Object toLuan(Object obj) throws LuanException {
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164 if( !type(obj).equals("java") )
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165 return obj;
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166 LuanTable tbl = new LuanTable();
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167 if( obj instanceof Map ) {
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168 Map map = (Map)obj;
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169 for( Object stupid : map.entrySet() ) {
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170 Map.Entry entry = (Map.Entry)stupid;
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171 Object key = entry.getKey();
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172 Object value = entry.getValue();
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173 if( key != null && value != null )
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174 tbl.rawPut(toLuan(key),toLuan(value));
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175 }
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176 return tbl;
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177 }
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178 if( obj instanceof Set ) {
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179 Set set = (Set)obj;
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180 for( Object el : set ) {
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181 if( el != null )
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182 tbl.rawPut(toLuan(el),Boolean.TRUE);
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183 }
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184 return tbl;
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185 }
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186 List list;
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187 if( obj instanceof List ) {
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188 list = (List)obj;
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189 } else {
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190 Class cls = obj.getClass();
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191 if( cls.isArray() && !cls.getComponentType().isPrimitive() ) {
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192 Object[] a = (Object[])obj;
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193 list = Arrays.asList(a);
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194 } else
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195 throw new LuanException("can't convert type "+obj.getClass().getName()+" to luan");
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196 }
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197 int n = list.size();
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198 for( int i=0; i<n; i++ ) {
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199 Object val = list.get(i);
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200 if( val != null )
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201 tbl.rawPut(i+1,toLuan(val));
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202 }
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203 return tbl;
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204 }
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205
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206 public static Object toJava(Object obj) throws LuanException {
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207 if( !(obj instanceof LuanTable) )
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208 return obj;
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209 LuanTable tbl = (LuanTable)obj;
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210 if( tbl.isList() ) {
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211 List list = new ArrayList();
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212 for( Object el : tbl.asList() ) {
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213 list.add( toJava(el) );
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214 }
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215 return list;
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216 } else {
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217 Map map = new LinkedHashMap();
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218 Iterator<Map.Entry> iter = tbl.rawIterator();
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219 while( iter.hasNext() ) {
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220 Map.Entry entry = iter.next();
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221 map.put( toJava(entry.getKey()), toJava(entry.getValue()) );
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222 }
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223 return map;
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224 }
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225 }
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226
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227 public static LuanTable table(LuanTable v) throws LuanException {
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228 Utils.checkNotNull(v);
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229 return v;
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230 }
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231
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232
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233 private Luan() {} // never
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234 }