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java.lang.Objectorg.apache.lucene.util.AttributeSource
org.apache.lucene.analysis.TokenStream
org.apache.lucene.analysis.TokenFilter
org.apache.lucene.analysis.ngram.NGramTokenFilter
public final class NGramTokenFilter
Tokenizes the input into n-grams of the given size(s).
| Nested Class Summary |
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| Nested classes/interfaces inherited from class org.apache.lucene.util.AttributeSource |
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org.apache.lucene.util.AttributeSource.AttributeFactory, org.apache.lucene.util.AttributeSource.State |
| Field Summary | |
|---|---|
static int |
DEFAULT_MAX_NGRAM_SIZE
|
static int |
DEFAULT_MIN_NGRAM_SIZE
|
| Fields inherited from class org.apache.lucene.analysis.TokenFilter |
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input |
| Constructor Summary | |
|---|---|
NGramTokenFilter(org.apache.lucene.analysis.TokenStream input)
Creates NGramTokenFilter with default min and max n-grams. |
|
NGramTokenFilter(org.apache.lucene.analysis.TokenStream input,
int minGram,
int maxGram)
Creates NGramTokenFilter with given min and max n-grams. |
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| Method Summary | |
|---|---|
boolean |
incrementToken()
Returns the next token in the stream, or null at EOS. |
void |
reset()
|
| Methods inherited from class org.apache.lucene.analysis.TokenFilter |
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close, end |
| Methods inherited from class org.apache.lucene.util.AttributeSource |
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addAttribute, addAttributeImpl, captureState, clearAttributes, cloneAttributes, copyTo, equals, getAttribute, getAttributeClassesIterator, getAttributeFactory, getAttributeImplsIterator, hasAttribute, hasAttributes, hashCode, reflectAsString, reflectWith, restoreState, toString |
| Methods inherited from class java.lang.Object |
|---|
clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
| Field Detail |
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public static final int DEFAULT_MIN_NGRAM_SIZE
public static final int DEFAULT_MAX_NGRAM_SIZE
| Constructor Detail |
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public NGramTokenFilter(org.apache.lucene.analysis.TokenStream input,
int minGram,
int maxGram)
input - TokenStream holding the input to be tokenizedminGram - the smallest n-gram to generatemaxGram - the largest n-gram to generatepublic NGramTokenFilter(org.apache.lucene.analysis.TokenStream input)
input - TokenStream holding the input to be tokenized| Method Detail |
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public final boolean incrementToken()
throws IOException
incrementToken in class org.apache.lucene.analysis.TokenStreamIOException
public void reset()
throws IOException
reset in class org.apache.lucene.analysis.TokenFilterIOException
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