org.janusgraph.diskstorage.lucene

Class LuceneCustomAnalyzer

java.lang.Object

org.apache.lucene.analysis.Analyzer

org.apache.lucene.analysis.AnalyzerWrapper

org.apache.lucene.analysis.DelegatingAnalyzerWrapper

org.janusgraph.diskstorage.lucene.LuceneCustomAnalyzer

All Implemented Interfaces:

Closeable, AutoCloseable

public class LuceneCustomAnalyzer
extends org.apache.lucene.analysis.DelegatingAnalyzerWrapper

An Analyzer that allows delegating analysis to custom analyzers. The class names for the custom analyzers are provided with Parameters passed to an IndexBuilder when declaring a lucene backed mixed index:

 addKey(someStringProperty, Mapping.TEXT.asParameter(), Parameter.of(ParameterType.TEXT_ANALYZER.getName(),
        "org.apache.lucene.analysis.fr.FrenchAnalyzer"))
 

Custom analyzers are instantiated lazily and then cached for reuse.

Author:

Olivier binda (olivier.binda@wanadoo.fr)

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.analysis.Analyzer

org.apache.lucene.analysis.Analyzer.ReuseStrategy, org.apache.lucene.analysis.Analyzer.TokenStreamComponents

Field Summary

Fields inherited from class org.apache.lucene.analysis.Analyzer

GLOBAL_REUSE_STRATEGY, PER_FIELD_REUSE_STRATEGY

Constructor Summary

Constructors

Constructor and Description
LuceneCustomAnalyzer(String store, KeyInformation.IndexRetriever informations, org.apache.lucene.analysis.Analyzer.ReuseStrategy fallbackStrategy)

Method Summary

Modifier and Type	Method and Description
protected org.apache.lucene.analysis.Analyzer	getWrappedAnalyzer(String fieldName)

Methods inherited from class org.apache.lucene.analysis.DelegatingAnalyzerWrapper

wrapComponents, wrapReader, wrapReaderForNormalization, wrapTokenStreamForNormalization

Methods inherited from class org.apache.lucene.analysis.AnalyzerWrapper

attributeFactory, createComponents, getOffsetGap, getPositionIncrementGap, initReader, initReaderForNormalization, normalize

Methods inherited from class org.apache.lucene.analysis.Analyzer

close, getReuseStrategy, getVersion, normalize, setVersion, tokenStream, tokenStream

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

LuceneCustomAnalyzer

public LuceneCustomAnalyzer(String store,
                            KeyInformation.IndexRetriever informations,
                            org.apache.lucene.analysis.Analyzer.ReuseStrategy fallbackStrategy)

Method Detail

getWrappedAnalyzer

protected final org.apache.lucene.analysis.Analyzer getWrappedAnalyzer(String fieldName)

Specified by:

getWrappedAnalyzer in class org.apache.lucene.analysis.AnalyzerWrapper