org.apache.lucene.analysis.cn.smart

Class HMMChineseTokenizer

java.lang.Object

org.apache.lucene.util.AttributeSource

org.apache.lucene.analysis.TokenStream

org.apache.lucene.analysis.Tokenizer

org.apache.lucene.analysis.util.SegmentingTokenizerBase

org.apache.lucene.analysis.cn.smart.HMMChineseTokenizer

All Implemented Interfaces:

Closeable, AutoCloseable

public class HMMChineseTokenizer
extends SegmentingTokenizerBase

Tokenizer for Chinese or mixed Chinese-English text.

The analyzer uses probabilistic knowledge to find the optimal word segmentation for Simplified Chinese text. The text is first broken into sentences, then each sentence is segmented into words.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.util.AttributeSource

AttributeSource.State

Field Summary

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

buffer, BUFFERMAX, offset

Fields inherited from class org.apache.lucene.analysis.Tokenizer

input

Fields inherited from class org.apache.lucene.analysis.TokenStream

DEFAULT_TOKEN_ATTRIBUTE_FACTORY

Constructor Summary

Constructors

Constructor and Description
HMMChineseTokenizer() Creates a new HMMChineseTokenizer
HMMChineseTokenizer(AttributeFactory factory) Creates a new HMMChineseTokenizer, supplying the AttributeFactory

Method Summary

Methods

Modifier and Type	Method and Description
protected boolean	incrementWord()
void	reset()
protected void	setNextSentence(int sentenceStart, int sentenceEnd)

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

end, incrementToken, isSafeEnd

Methods inherited from class org.apache.lucene.analysis.Tokenizer

close, correctOffset, setReader

Methods inherited from class org.apache.lucene.util.AttributeSource

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

Constructor Detail

HMMChineseTokenizer

public HMMChineseTokenizer()

Creates a new HMMChineseTokenizer

HMMChineseTokenizer

public HMMChineseTokenizer(AttributeFactory factory)

Creates a new HMMChineseTokenizer, supplying the AttributeFactory

Method Detail

setNextSentence

protected void setNextSentence(int sentenceStart,
                   int sentenceEnd)

Specified by:

setNextSentence in class SegmentingTokenizerBase

incrementWord

protected boolean incrementWord()

Specified by:

incrementWord in class SegmentingTokenizerBase

reset

public void reset()
           throws IOException

Overrides:

reset in class SegmentingTokenizerBase

Throws:

IOException