Class ConcatenateGraphFilterFactory
- java.lang.Object
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- org.apache.lucene.analysis.util.AbstractAnalysisFactory
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- org.apache.lucene.analysis.util.TokenFilterFactory
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- org.apache.lucene.analysis.miscellaneous.ConcatenateGraphFilterFactory
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public class ConcatenateGraphFilterFactory extends TokenFilterFactory
Factory forConcatenateGraphFilter
.- preserveSep:
For lucene versions lesser than
Version.LUCENE_8_4_0
WhetherConcatenateGraphFilter.SEP_LABEL
should separate the input tokens in the concatenated token - tokenSeparator:
Separator to use for concatenation. If not present,
ConcatenateGraphFilter.DEFAULT_TOKEN_SEPARATOR
will be used. If empty, tokens will be concatenated without any separators. - 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
- preserveSep:
For lucene versions lesser than
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Field Summary
Fields Modifier and Type Field Description private int
maxGraphExpansions
static java.lang.String
NAME
SPI nameprivate boolean
preservePositionIncrements
private java.lang.Character
tokenSeparator
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Fields inherited from class org.apache.lucene.analysis.util.AbstractAnalysisFactory
LUCENE_MATCH_VERSION_PARAM, luceneMatchVersion
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Constructor Summary
Constructors Constructor Description ConcatenateGraphFilterFactory(java.util.Map<java.lang.String,java.lang.String> args)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description TokenStream
create(TokenStream input)
Transform the specified input TokenStreamprotected java.lang.Character
getCharacter(java.util.Map<java.lang.String,java.lang.String> args, java.lang.String name, java.lang.Character defaultVal)
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Methods inherited from class org.apache.lucene.analysis.util.TokenFilterFactory
availableTokenFilters, findSPIName, forName, lookupClass, normalize, reloadTokenFilters
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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
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Field Detail
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NAME
public static final java.lang.String NAME
SPI name- See Also:
- Constant Field Values
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tokenSeparator
private java.lang.Character tokenSeparator
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preservePositionIncrements
private boolean preservePositionIncrements
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maxGraphExpansions
private int maxGraphExpansions
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Method Detail
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create
public TokenStream create(TokenStream input)
Description copied from class:TokenFilterFactory
Transform the specified input TokenStream- Specified by:
create
in classTokenFilterFactory
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getCharacter
protected java.lang.Character getCharacter(java.util.Map<java.lang.String,java.lang.String> args, java.lang.String name, java.lang.Character defaultVal)
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