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annotate src/luan/modules/parsers/LuanToString.java @ 1806:3b7a8f1cc887 default tip

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update discord
author Franklin Schmidt <fschmidt@gmail.com>
date Thu, 09 May 2024 20:39:53 -0600
parents f8f5c51f5b36
children
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1 package luan.modules.parsers;
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2
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3 import java.util.List;
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4 import java.util.Map;
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5 import java.util.Set;
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6 import java.util.HashSet;
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7 import java.util.Collections;
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8 import luan.Luan;
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9 import luan.LuanTable;
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10 import luan.LuanFunction;
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11 import luan.LuanException;
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12 import luan.LuanRuntimeException;
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14
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15 public final class LuanToString {
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16 private static final Set<String> settingsKeys = new HashSet<String>();
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17 static {
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18 Collections.addAll(settingsKeys
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19 ,"strict"
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20 ,"number_types"
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21 ,"compressed"
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22 ,"long_strings"
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23 ,"inline"
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24 ,"no_name_keys"
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25 );
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26 }
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27
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28 private static void checkOptions(LuanTable options) throws LuanException {
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29 for( Map.Entry entry : options.rawIterable() ) {
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30 if( !settingsKeys.contains(entry.getKey()) )
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31 throw new LuanException("invalid option: "+entry.getKey());
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32 if( !(entry.getValue() instanceof Boolean) )
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33 throw new LuanException("options values must be boolean");
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34 }
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35 }
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36
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37 public static class Settings implements Cloneable {
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38 public boolean strict = false;
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39 public boolean numberTypes = false;
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40 public boolean compressed = false;
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41 public boolean longStrings = false;
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42 public boolean inline = false;
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43 public boolean noNameKeys = false;
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44
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45 void applyOptions(LuanTable options) throws LuanException {
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46 checkOptions(options);
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47 Boolean b;
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48 b = (Boolean)options.rawGet("strict");
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49 if( b != null )
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50 strict = b;
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51 b = (Boolean)options.rawGet("number_types");
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52 if( b != null )
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53 numberTypes = b;
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54 b = (Boolean)options.rawGet("compressed");
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55 if( b != null )
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56 compressed = b;
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57 b = (Boolean)options.rawGet("long_strings");
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58 if( b != null )
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59 longStrings = b;
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60 b = (Boolean)options.rawGet("inline");
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61 if( b != null )
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62 inline = b;
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63 b = (Boolean)options.rawGet("no_name_keys");
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64 if( b != null )
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65 noNameKeys = b;
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66 }
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67
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68 public Settings cloneSettings() {
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69 try {
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70 return (Settings)clone();
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71 } catch(CloneNotSupportedException e) {
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72 throw new RuntimeException(e);
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73 }
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74 }
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75 }
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76 private static final Settings keySettings = new Settings();
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77
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78 public final Settings settingsInit = new Settings();
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79 private final Luan luan;
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80 private final LuanFunction fnOptions;
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81 private final LuanTable stack = new LuanTable();
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82 private final Set<LuanTable> seen = new HashSet<LuanTable>();
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83
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84 public LuanToString() {
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85 this.luan = null;
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86 this.fnOptions = null;
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87 }
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88
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89 public LuanToString(Luan luan) throws LuanException {
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90 this.luan = luan;
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91 this.fnOptions = null;
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92 }
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93
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94 public LuanToString(Luan luan,LuanTable options) throws LuanException {
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95 this.luan = luan;
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96 this.fnOptions = null;
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97 settingsInit.applyOptions(options);
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98 }
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99
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100 public LuanToString(Luan luan,LuanFunction fnOptions) throws LuanException {
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101 this.luan = luan;
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102 this.fnOptions = fnOptions;
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103 LuanTable options = getOptions();
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104 if( options != null )
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105 settingsInit.applyOptions(options);
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106 }
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107
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108 private LuanTable getOptions() throws LuanException {
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109 if( fnOptions == null )
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110 return null;
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111 Object rtn = fnOptions.call(luan,stack);
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112 if( !(rtn==null || rtn instanceof LuanTable) )
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113 throw new LuanException("options-function must return table or nil");
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114 return (LuanTable)rtn;
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115 }
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116
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117 public String toString(Object obj) throws LuanException {
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118 StringBuilder sb = new StringBuilder();
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119 objectToString(obj,sb,0,settingsInit);
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120 return sb.toString();
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121 }
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122
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123 private void objectToString(Object obj,StringBuilder sb,int indented,Settings settings) throws LuanException {
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124 if( obj == null ) {
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125 sb.append( "nil" );
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126 return;
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127 }
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128 if( obj instanceof Boolean ) {
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129 sb.append( obj );
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130 return;
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131 }
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132 if( obj instanceof Number ) {
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133 toString((Number)obj,sb,settings);
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134 return;
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135 }
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136 if( obj instanceof String ) {
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137 toString((String)obj,sb,settings);
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138 return;
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139 }
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140 if( obj instanceof LuanTable ) {
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141 toString((LuanTable)obj,sb,indented,settings);
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142 return;
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143 }
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144 if( settings.strict )
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145 throw new LuanException("can't handle type "+Luan.type(obj));
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146 sb.append( '<' );
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147 sb.append( obj );
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148 sb.append( '>' );
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149 }
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150
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151 private void toString(LuanTable tbl,StringBuilder sb,int indented,Settings settings) throws LuanException {
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152 if( !seen.add(tbl) ) {
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153 if( settings.strict )
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154 throw new LuanException("loop in "+tbl.rawToString());
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155 sb.append("<loop>");
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156 return;
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157 }
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158 if( tbl.getMetatable()!=null ) {
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159 if( settings.strict )
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160 throw new LuanException("can't handle metatables when strict");
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161 if( luan==null )
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162 throw new LuanException("can't handle metatables when luan isn't set");
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163 LuanFunction pairs = luan.getHandlerFunction("__pairs",tbl);
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164 if( pairs != null ) {
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165 sb.append( '{' );
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166 boolean first = true;
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167 for( Object obj : tbl.iterable(luan) ) {
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168 Map.Entry entry = (Map.Entry)obj;
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169 if( settings.compressed ) {
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170 if( first )
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171 first = false;
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172 else
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173 sb.append( ',' );
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174 } else if( settings.inline ) {
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175 if( first ) {
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176 first = false;
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177 sb.append( ' ' );
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178 } else
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179 sb.append( ", " );
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180 } else {
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181 first = false;
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182 indent(sb,indented+1);
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183 }
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184 toString(entry,sb,indented+1,settings);
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185 }
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186 if( !first ) {
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187 if( settings.compressed ) {
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188 } else if( settings.inline ) {
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189 sb.append( ' ' );
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190 } else {
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191 indent(sb,indented);
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192 }
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193 }
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194 sb.append( '}' );
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195 return;
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196 }
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197 }
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198 List list = tbl.asList();
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199 Map map = tbl.rawMap();
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200 sb.append( '{' );
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201 boolean first = true;
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202 for( Object obj : list ) {
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203 if( settings.compressed ) {
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204 if( first )
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205 first = false;
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206 else
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207 sb.append( ',' );
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208 } else if( settings.inline ) {
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209 if( first ) {
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210 first = false;
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211 sb.append( ' ' );
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212 } else
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213 sb.append( ", " );
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214 } else {
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215 indent(sb,indented+1);
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216 }
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217 objectToString(obj,sb,indented+1,settings);
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218 }
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219 for( Object obj : map.entrySet() ) {
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220 Map.Entry entry = (Map.Entry)obj;
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221 if( settings.compressed ) {
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222 if( first )
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223 first = false;
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224 else
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225 sb.append( ',' );
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226 } else if( settings.inline ) {
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227 if( first ) {
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228 first = false;
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229 sb.append( ' ' );
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230 } else
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231 sb.append( ", " );
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232 } else {
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233 indent(sb,indented+1);
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234 }
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235 toString(entry,sb,indented+1,settings);
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236 }
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237 if( !list.isEmpty() || !map.isEmpty() ) {
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238 if( settings.compressed ) {
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239 } else if( settings.inline ) {
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240 sb.append( ' ' );
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241 } else {
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242 indent(sb,indented);
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243 }
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244 }
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245 sb.append( '}' );
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246 return;
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247 }
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248
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249 private void toString(Map.Entry entry,StringBuilder sb,int indented,Settings settings)
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250 throws LuanException
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251 {
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252 Object key = entry.getKey();
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253 if( key instanceof String && !settings.noNameKeys && ((String)key).matches("[a-zA-Z_][a-zA-Z_0-9]*") ) {
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254 sb.append( (String)key );
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255 } else {
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diff changeset
256 sb.append( '[' );
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diff changeset
257 objectToString( key, sb, indented, keySettings );
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258 sb.append( ']' );
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259 }
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260 sb.append( settings.compressed ? "=" : " = " );
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diff changeset
261 stack.rawAdd(key); // push
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diff changeset
262 LuanTable options = getOptions();
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diff changeset
263 if( options != null ) {
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diff changeset
264 settings = settings.cloneSettings();
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diff changeset
265 settings.applyOptions(options);
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266 }
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diff changeset
267 objectToString( entry.getValue(), sb, indented, settings );
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diff changeset
268 stack.removeFromList(stack.rawLength()); // pop
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diff changeset
269 }
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diff changeset
270
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diff changeset
271 private void indent(StringBuilder sb,int indented) {
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diff changeset
272 sb.append( '\n' );
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diff changeset
273 for( int i=0; i<indented; i++ ) {
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diff changeset
274 sb.append( '\t' );
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diff changeset
275 }
9a1aa6fc0b4e remove json_pretty_string and make json_string somewhat pretty
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diff changeset
276 }
1115
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diff changeset
277
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diff changeset
278 private void toString(Number n,StringBuilder sb,Settings settings) throws LuanException {
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diff changeset
279 if( settings.numberTypes ) {
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diff changeset
280 sb.append( n.getClass().getSimpleName().toLowerCase() );
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281 sb.append( '(' );
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diff changeset
282 }
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diff changeset
283 sb.append( Luan.toString(n) );
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diff changeset
284 if( settings.numberTypes )
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285 sb.append( ')' );
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diff changeset
286 }
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diff changeset
287
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b89212fd04b5 remove table.luan
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diff changeset
288 public static void addNumberTypes(Luan luan,LuanTable env) {
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diff changeset
289 try {
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b89212fd04b5 remove table.luan
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diff changeset
290 LuanTable module = (LuanTable)luan.require("luan:Number.luan");
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diff changeset
291 env.rawPut( "double", module.fn(luan,"double") );
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diff changeset
292 env.rawPut( "float", module.fn(luan,"float") );
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diff changeset
293 env.rawPut( "integer", module.fn(luan,"integer") );
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diff changeset
294 env.rawPut( "long", module.fn(luan,"long") );
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diff changeset
295 } catch(LuanException e) {
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296 throw new LuanRuntimeException(e);
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297 }
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298 }
1550
0dc3be25ad20 use_long_strings
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diff changeset
299
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diff changeset
300 private void toString(String s,StringBuilder sb,Settings settings) {
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diff changeset
301 if( settings.longStrings ) {
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diff changeset
302 StringBuilder start = new StringBuilder("[[");
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diff changeset
303 if( s.indexOf('\n') != -1 )
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diff changeset
304 start.append('\n');
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diff changeset
305 StringBuilder end = new StringBuilder("]]");
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diff changeset
306 while( s.contains(end) ) {
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diff changeset
307 start.insert(1,'=');
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diff changeset
308 end.insert(1,'=');
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diff changeset
309 }
0dc3be25ad20 use_long_strings
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diff changeset
310 sb.append(start);
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diff changeset
311 sb.append(s);
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diff changeset
312 sb.append(end);
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diff changeset
313 return;
0dc3be25ad20 use_long_strings
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diff changeset
314 }
0dc3be25ad20 use_long_strings
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diff changeset
315 sb.append( '"' );
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diff changeset
316 sb.append( Luan.stringEncode(s) );
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diff changeset
317 sb.append( '"' );
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diff changeset
318 }
0dc3be25ad20 use_long_strings
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diff changeset
319
720
bdd766df1c17 add json parser
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parents:
diff changeset
320 }