org.apache.lucene.search.uhighlight

Class MemoryIndexOffsetStrategy

java.lang.Object

org.apache.lucene.search.uhighlight.FieldOffsetStrategy

org.apache.lucene.search.uhighlight.AnalysisOffsetStrategy

org.apache.lucene.search.uhighlight.MemoryIndexOffsetStrategy

public class MemoryIndexOffsetStrategy
extends AnalysisOffsetStrategy

Uses an Analyzer on content to get offsets and then populates a MemoryIndex.

Field Summary

Fields

Modifier and Type	Field and Description
private LeafReader	memIndexLeafReader
private MemoryIndex	memoryIndex
private CharacterRunAutomaton	preMemIndexFilterAutomaton

Fields inherited from class org.apache.lucene.search.uhighlight.AnalysisOffsetStrategy

analyzer

Fields inherited from class org.apache.lucene.search.uhighlight.FieldOffsetStrategy

components

Constructor Summary

Constructors

Constructor and Description
MemoryIndexOffsetStrategy(UHComponents components, Analyzer analyzer)

Method Summary

Modifier and Type	Method and Description
private static CharacterRunAutomaton	buildCombinedAutomaton(UHComponents components) Build one CharacterRunAutomaton matching any term the query might match.
OffsetsEnum	getOffsetsEnum(LeafReader reader, int docId, java.lang.String content) The primary method -- return offsets for highlightable words in the specified document.
private static FilteringTokenFilter	newKeepWordFilter(TokenStream tokenStream, CharacterRunAutomaton charRunAutomaton)

Methods inherited from class org.apache.lucene.search.uhighlight.AnalysisOffsetStrategy

getOffsetSource, tokenStream

Methods inherited from class org.apache.lucene.search.uhighlight.FieldOffsetStrategy

createOffsetsEnumFromReader, createOffsetsEnumsForAutomata, createOffsetsEnumsForTerms, createOffsetsEnumsWeightMatcher, getField

Methods inherited from class java.lang.Object

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

Field Detail

memoryIndex

private final MemoryIndex memoryIndex

memIndexLeafReader

private final LeafReader memIndexLeafReader

preMemIndexFilterAutomaton

private final CharacterRunAutomaton preMemIndexFilterAutomaton

Constructor Detail

MemoryIndexOffsetStrategy

public MemoryIndexOffsetStrategy(UHComponents components,
                                 Analyzer analyzer)

Method Detail

buildCombinedAutomaton

private static CharacterRunAutomaton buildCombinedAutomaton(UHComponents components)

Build one CharacterRunAutomaton matching any term the query might match.

getOffsetsEnum

public OffsetsEnum getOffsetsEnum(LeafReader reader,
                                  int docId,
                                  java.lang.String content)
                           throws java.io.IOException

Description copied from class: FieldOffsetStrategy

The primary method -- return offsets for highlightable words in the specified document. Callers are expected to close the returned OffsetsEnum when it has been finished with

Specified by:

getOffsetsEnum in class FieldOffsetStrategy

Throws:

java.io.IOException

newKeepWordFilter

private static FilteringTokenFilter newKeepWordFilter(TokenStream tokenStream,
                                                      CharacterRunAutomaton charRunAutomaton)