Class ConcatenateGraphFilterFactory
- java.lang.Object
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- org.apache.lucene.analysis.AbstractAnalysisFactory
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- org.apache.lucene.analysis.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 thanVersion.LUCENE_8_4_0
WhetherConcatenateGraphFilter.SEP_LABEL
should separate the input tokens in the concatenated tokentokenSeparator
: 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 consecutiveConcatenateGraphFilter.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 throwTooComplexToDeterminizeException
to preserve the stability and memory of the machine.
- Since:
- 7.4.0
- See Also:
ConcatenateGraphFilter
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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.AbstractAnalysisFactory
LUCENE_MATCH_VERSION_PARAM, luceneMatchVersion
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Constructor Summary
Constructors Constructor Description ConcatenateGraphFilterFactory()
Default ctor for compatibility with SPIConcatenateGraphFilterFactory(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.TokenFilterFactory
availableTokenFilters, findSPIName, forName, lookupClass, normalize, reloadTokenFilters
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Methods inherited from class org.apache.lucene.analysis.AbstractAnalysisFactory
defaultCtorException, 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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