annotate src/goodjava/lucene/api/LuceneIndexWriter.java @ 1474:13cbce740e1e

LowercaseAnalyzer
author Franklin Schmidt <fschmidt@gmail.com>
date Fri, 17 Apr 2020 21:53:09 -0600
parents 5e3870618377
children 7d145095cc0b
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1 package goodjava.lucene.api;
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2
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3 import java.io.IOException;
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4 import java.util.Map;
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5 import java.util.HashMap;
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6 import java.util.List;
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7 import org.apache.lucene.analysis.Analyzer;
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8 import org.apache.lucene.document.Document;
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9 import org.apache.lucene.document.Field;
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10 import org.apache.lucene.document.StoredField;
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11 import org.apache.lucene.document.StringField;
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12 import org.apache.lucene.document.TextField;
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13 import org.apache.lucene.document.IntField;
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14 import org.apache.lucene.document.LongField;
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15 import org.apache.lucene.document.DoubleField;
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16 import org.apache.lucene.document.FloatField;
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17 import org.apache.lucene.index.IndexWriter;
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18 import org.apache.lucene.index.IndexWriterConfig;
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19 import org.apache.lucene.index.Term;
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20 import org.apache.lucene.index.DirectoryReader;
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21 import org.apache.lucene.index.IndexReader;
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22 import org.apache.lucene.search.Query;
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23 import org.apache.lucene.search.IndexSearcher;
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24 import org.apache.lucene.store.Directory;
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25 import org.apache.lucene.util.Version;
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26
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27
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28 public final class LuceneIndexWriter implements GoodIndexWriter {
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29 private final FieldAnalyzer fieldAnalyzer = new FieldAnalyzer();
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30 public final Version luceneVersion;
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31 public final IndexWriterConfig luceneConfig;
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32 public final IndexWriter luceneWriter;
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33 public final GoodIndexWriterConfig goodConfig;
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34 private final Map<String,Boolean> indexedMap = new HashMap<String,Boolean>();
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35
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36 public LuceneIndexWriter(Version luceneVersion,Directory dir,GoodIndexWriterConfig goodConfig) throws IOException {
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37 this.luceneVersion = luceneVersion;
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38 this.luceneConfig = new IndexWriterConfig(luceneVersion,fieldAnalyzer);
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39 this.luceneWriter = new IndexWriter(dir,luceneConfig);
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40 this.goodConfig = goodConfig;
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41 luceneWriter.commit(); // commit index creation
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42 }
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43
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44 public void close() throws IOException {
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45 luceneWriter.close();
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46 }
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47
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48 public void commit() throws IOException {
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49 luceneWriter.commit();
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50 }
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51
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52 public void rollback() throws IOException {
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53 luceneWriter.rollback();
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54 }
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55
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56 public void deleteAll() throws IOException {
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57 luceneWriter.deleteAll();
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58 }
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59
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60 public void deleteDocuments(Query query) throws IOException {
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61 luceneWriter.deleteDocuments(query);
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62 }
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63
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64 public void addDocument(Map<String,Object> storedFields) throws IOException {
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65 Document doc = newDocument(storedFields);
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66 luceneWriter.addDocument(doc);
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67 }
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68
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69 public void updateDocument(String keyFieldName,Map<String,Object> storedFields) throws IOException {
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70 if( !isIndexed(keyFieldName) )
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71 throw new RuntimeException("can't update using unindexed field "+keyFieldName);
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72 if( fieldAnalyzer.isAdded(keyFieldName) )
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73 throw new RuntimeException("can't update using analyzeed field "+keyFieldName);
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74 Document doc = newDocument(storedFields);
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75 Object keyValue = storedFields.get(keyFieldName);
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76 if( keyValue==null )
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77 throw new RuntimeException("no value for field "+keyFieldName);
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78 Term term = LuceneUtils.term(keyFieldName,keyValue);
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79 luceneWriter.updateDocument(term,doc);
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80 }
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81
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82 private Document newDocument(Map<String,Object> storedFields) {
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83 Document doc = new Document();
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84 addFields(doc,storedFields,Field.Store.YES);
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85 Map<String,Object> unstoredFields = goodConfig.getUnstoredFields(storedFields);
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86 addFields(doc,unstoredFields,Field.Store.NO);
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87 return doc;
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88 }
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89
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90 private void addFields( Document doc, Map<String,Object> fields, Field.Store store ) {
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91 for( Map.Entry<String,Object> entry : fields.entrySet() ) {
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92 String name = entry.getKey();
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93 Object value = entry.getValue();
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94 if( value instanceof List ) {
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95 for( Object v : (List)value ) {
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96 doc.add( newField(name,v,store) );
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97 }
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98 } else {
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99 doc.add( newField(name,value,store) );
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100 }
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101 }
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102 }
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103
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104 private Field newField( String name, Object value, Field.Store store ) {
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105 boolean isIndexed = isIndexed(name);
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106 if( store==Field.Store.NO && !isIndexed )
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107 throw new RuntimeException("field '"+name+"' is unstored and unindexed");
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108 if( value instanceof String ) {
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109 String s = (String)value;
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110 if( !isIndexed ) {
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111 return new StoredField(name,s);
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112 } else if( !fieldAnalyzer.isAdded(name) ) {
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113 return new StringField(name,s,store);
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114 } else {
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115 return new TextField(name,s,store);
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116 }
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117 } else if( value instanceof Integer ) {
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118 int i = (Integer)value;
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119 if( !isIndexed ) {
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120 return new StoredField(name,i);
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121 } else {
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122 return new IntField(name,i,store);
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123 }
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124 } else if( value instanceof Long ) {
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125 long i = (Long)value;
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126 if( !isIndexed ) {
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127 return new StoredField(name,i);
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128 } else {
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129 return new LongField(name,i,store);
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130 }
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131 } else if( value instanceof Double ) {
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132 double i = (Double)value;
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133 if( !isIndexed ) {
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134 return new StoredField(name,i);
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135 } else {
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136 return new DoubleField(name,i,store);
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137 }
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138 } else if( value instanceof Float ) {
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139 float i = (Float)value;
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140 if( !isIndexed ) {
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141 return new StoredField(name,i);
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142 } else {
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143 return new FloatField(name,i,store);
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144 }
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145 } else if( value instanceof byte[] ) {
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146 if( isIndexed )
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147 throw new RuntimeException("can't index byte field "+name);
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148 byte[] b = (byte[])value;
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149 return new StoredField(name, b);
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150 } else
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151 throw new RuntimeException("invalid value type "+value.getClass()+"' for field '"+name+"'");
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152 }
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153
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154 private synchronized boolean isIndexed(String fieldName) {
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155 Boolean b = indexedMap.get(fieldName);
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156 if( b==null ) {
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157 b = goodConfig.isIndexed(fieldName);
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158 indexedMap.put(fieldName,b);
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159 Analyzer analyzer = goodConfig.getAnalyzer(fieldName);
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160 if( analyzer!=null )
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161 fieldAnalyzer.add(fieldName,analyzer);
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162 }
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163 return b;
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164 }
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165
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166
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167 public void reindexDocuments(final String keyFieldName,Query query) throws IOException {
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168 IndexReader reader = openReader();
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169 final IndexSearcher searcher = new IndexSearcher(reader);
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170 searcher.search( query, new GoodCollector(){
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171 public void collectDoc(int iDoc) throws IOException {
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172 Document doc = searcher.doc(iDoc);
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173 Map<String,Object> storedFields = LuceneUtils.toMap(doc);
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174 updateDocument(keyFieldName,storedFields);
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175 }
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176 });
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177 reader.close();
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178 }
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179
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180 public IndexReader openReader() throws IOException {
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181 return DirectoryReader.open(luceneWriter.getDirectory());
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182 }
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183 }