public final class EdgeNGramTokenizer
extends org.apache.lucene.analysis.Tokenizer
This Tokenizer
create n-grams from the beginning edge or ending edge of a input token.
MaxGram can't be larger than 1024 because of limitation.
Modifier and Type | Class and Description |
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static class |
EdgeNGramTokenizer.Side
Specifies which side of the input the n-gram should be generated from
|
Modifier and Type | Field and Description |
---|---|
static int |
DEFAULT_MAX_GRAM_SIZE |
static int |
DEFAULT_MIN_GRAM_SIZE |
static EdgeNGramTokenizer.Side |
DEFAULT_SIDE |
Constructor and Description |
---|
EdgeNGramTokenizer(org.apache.lucene.util.AttributeSource.AttributeFactory factory,
Reader input,
EdgeNGramTokenizer.Side side,
int minGram,
int maxGram)
Creates EdgeNGramTokenizer that can generate n-grams in the sizes of the given range
|
EdgeNGramTokenizer(org.apache.lucene.util.AttributeSource.AttributeFactory factory,
Reader input,
String sideLabel,
int minGram,
int maxGram)
Creates EdgeNGramTokenizer that can generate n-grams in the sizes of the given range
|
EdgeNGramTokenizer(org.apache.lucene.util.AttributeSource source,
Reader input,
EdgeNGramTokenizer.Side side,
int minGram,
int maxGram)
Creates EdgeNGramTokenizer that can generate n-grams in the sizes of the given range
|
EdgeNGramTokenizer(org.apache.lucene.util.AttributeSource source,
Reader input,
String sideLabel,
int minGram,
int maxGram)
Creates EdgeNGramTokenizer that can generate n-grams in the sizes of the given range
|
EdgeNGramTokenizer(Reader input,
EdgeNGramTokenizer.Side side,
int minGram,
int maxGram)
Creates EdgeNGramTokenizer that can generate n-grams in the sizes of the given range
|
EdgeNGramTokenizer(Reader input,
String sideLabel,
int minGram,
int maxGram)
Creates EdgeNGramTokenizer that can generate n-grams in the sizes of the given range
|
Modifier and Type | Method and Description |
---|---|
void |
end() |
boolean |
incrementToken()
Returns the next token in the stream, or null at EOS.
|
void |
reset() |
addAttribute, addAttributeImpl, captureState, clearAttributes, cloneAttributes, copyTo, equals, getAttribute, getAttributeClassesIterator, getAttributeFactory, getAttributeImplsIterator, hasAttribute, hasAttributes, hashCode, reflectAsString, reflectWith, restoreState, toString
public static final EdgeNGramTokenizer.Side DEFAULT_SIDE
public static final int DEFAULT_MAX_GRAM_SIZE
public static final int DEFAULT_MIN_GRAM_SIZE
public EdgeNGramTokenizer(Reader input, EdgeNGramTokenizer.Side side, int minGram, int maxGram)
input
- Reader
holding the input to be tokenizedside
- the EdgeNGramTokenizer.Side
from which to chop off an n-gramminGram
- the smallest n-gram to generatemaxGram
- the largest n-gram to generatepublic EdgeNGramTokenizer(org.apache.lucene.util.AttributeSource source, Reader input, EdgeNGramTokenizer.Side side, int minGram, int maxGram)
source
- AttributeSource
to useinput
- Reader
holding the input to be tokenizedside
- the EdgeNGramTokenizer.Side
from which to chop off an n-gramminGram
- the smallest n-gram to generatemaxGram
- the largest n-gram to generatepublic EdgeNGramTokenizer(org.apache.lucene.util.AttributeSource.AttributeFactory factory, Reader input, EdgeNGramTokenizer.Side side, int minGram, int maxGram)
factory
- AttributeSource.AttributeFactory
to useinput
- Reader
holding the input to be tokenizedside
- the EdgeNGramTokenizer.Side
from which to chop off an n-gramminGram
- the smallest n-gram to generatemaxGram
- the largest n-gram to generatepublic EdgeNGramTokenizer(Reader input, String sideLabel, int minGram, int maxGram)
input
- Reader
holding the input to be tokenizedsideLabel
- the name of the EdgeNGramTokenizer.Side
from which to chop off an n-gramminGram
- the smallest n-gram to generatemaxGram
- the largest n-gram to generatepublic EdgeNGramTokenizer(org.apache.lucene.util.AttributeSource source, Reader input, String sideLabel, int minGram, int maxGram)
source
- AttributeSource
to useinput
- Reader
holding the input to be tokenizedsideLabel
- the name of the EdgeNGramTokenizer.Side
from which to chop off an n-gramminGram
- the smallest n-gram to generatemaxGram
- the largest n-gram to generatepublic EdgeNGramTokenizer(org.apache.lucene.util.AttributeSource.AttributeFactory factory, Reader input, String sideLabel, int minGram, int maxGram)
factory
- AttributeSource.AttributeFactory
to useinput
- Reader
holding the input to be tokenizedsideLabel
- the name of the EdgeNGramTokenizer.Side
from which to chop off an n-gramminGram
- the smallest n-gram to generatemaxGram
- the largest n-gram to generatepublic boolean incrementToken() throws IOException
incrementToken
in class org.apache.lucene.analysis.TokenStream
IOException
public void end()
end
in class org.apache.lucene.analysis.TokenStream
public void reset() throws IOException
reset
in class org.apache.lucene.analysis.TokenStream
IOException