org.apache.lucene.analysis.miscellaneous

Class ConcatenateGraphFilterFactory

java.lang.Object

org.apache.lucene.analysis.util.AbstractAnalysisFactory

org.apache.lucene.analysis.util.TokenFilterFactory

org.apache.lucene.analysis.miscellaneous.ConcatenateGraphFilterFactory

public class ConcatenateGraphFilterFactory
extends TokenFilterFactory

Factory for ConcatenateGraphFilter.

• preserveSep: Whether ConcatenateGraphFilter.SEP_LABEL should separate the input tokens in the concatenated token
• preservePositionIncrements: Whether to add an empty token for missing positions. The effect is a consecutive ConcatenateGraphFilter.SEP_LABEL. When false, it's as if there were no missing positions (we pretend the surrounding tokens were adjacent).
• maxGraphExpansions: If the tokenStream graph has more than this many possible paths through, then we'll throw TooComplexToDeterminizeException to preserve the stability and memory of the machine.

Since:

7.4.0

See Also:

ConcatenateGraphFilter

Field Summary

Fields

Modifier and Type	Field and Description
private int	maxGraphExpansions
private boolean	preservePositionIncrements
private boolean	preserveSep

Fields inherited from class org.apache.lucene.analysis.util.AbstractAnalysisFactory

LUCENE_MATCH_VERSION_PARAM, luceneMatchVersion

Constructor Summary

Constructors

Constructor and Description
ConcatenateGraphFilterFactory(java.util.Map<java.lang.String,java.lang.String> args)

Method Summary

Modifier and Type	Method and Description
TokenStream	create(TokenStream input) Transform the specified input TokenStream

Methods inherited from class org.apache.lucene.analysis.util.TokenFilterFactory

availableTokenFilters, forName, lookupClass, normalize, reloadTokenFilters

Methods inherited from class org.apache.lucene.analysis.util.AbstractAnalysisFactory

get, get, get, get, get, getBoolean, getChar, getClassArg, getFloat, getInt, getLines, getLuceneMatchVersion, getOriginalArgs, getPattern, getSet, getSnowballWordSet, getWordSet, isExplicitLuceneMatchVersion, require, require, require, requireBoolean, requireChar, requireFloat, requireInt, setExplicitLuceneMatchVersion, splitAt, splitFileNames

Methods inherited from class java.lang.Object

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

Field Detail

preserveSep

private boolean preserveSep

preservePositionIncrements

private boolean preservePositionIncrements

maxGraphExpansions

private int maxGraphExpansions

Constructor Detail

ConcatenateGraphFilterFactory

public ConcatenateGraphFilterFactory(java.util.Map<java.lang.String,java.lang.String> args)

Method Detail

create

public TokenStream create(TokenStream input)

Description copied from class: TokenFilterFactory

Transform the specified input TokenStream

Specified by:

create in class TokenFilterFactory