org.apache.lucene.analysis.cn

Class ChineseTokenizer

java.lang.Object

org.apache.lucene.analysis.TokenStream

org.apache.lucene.analysis.Tokenizer

org.apache.lucene.analysis.cn.ChineseTokenizer

public final class ChineseTokenizer
extends Tokenizer

Title: ChineseTokenizer Description: Extract tokens from the Stream using Character.getType() Rule: A Chinese character as a single token Copyright: Copyright (c) 2001 Company: The difference between thr ChineseTokenizer and the CJKTokenizer (id=23545) is that they have different token parsing logic. Let me use an example. If having a Chinese text "C1C2C3C4" to be indexed, the tokens returned from the ChineseTokenizer are C1, C2, C3, C4. And the tokens returned from the CJKTokenizer are C1C2, C2C3, C3C4. Therefore the index the CJKTokenizer created is much larger. The problem is that when searching for C1, C1C2, C1C3, C4C2, C1C2C3 ... the ChineseTokenizer works, but the CJKTokenizer will not work.

Version:

1.0

Author:

Yiyi Sun

Field Summary

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

input

Constructor Summary

Constructors

Constructor and Description
ChineseTokenizer(Reader in)

Method Summary

Methods

Modifier and Type	Method and Description
Token	next() Returns the next token in the stream, or null at EOS.

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

close, reset

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

next, reset

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ChineseTokenizer

public ChineseTokenizer(Reader in)

Method Detail

next

public final Token next()
                 throws IOException

Description copied from class: TokenStream

Returns the next token in the stream, or null at EOS. The returned Token is a "full private copy" (not re-used across calls to next()) but will be slower than calling TokenStream.next(Token) instead..

Overrides:

next in class TokenStream

Throws:

IOException