org.apache.lucene.analysis.cjk

Class CJKTokenizer

java.lang.Object

org.apache.lucene.util.AttributeSource

org.apache.lucene.analysis.TokenStream

org.apache.lucene.analysis.Tokenizer

org.apache.lucene.analysis.cjk.CJKTokenizer

All Implemented Interfaces:

Closeable, AutoCloseable

Deprecated.

Use StandardTokenizer, CJKWidthFilter, CJKBigramFilter, and LowerCaseFilter instead.

@Deprecated
public final class CJKTokenizer
extends Tokenizer

CJKTokenizer is designed for Chinese, Japanese, and Korean languages.

The tokens returned are every two adjacent characters with overlap match.

Example: "java C1C2C3C4" will be segmented to: "java" "C1C2" "C2C3" "C3C4".

Additionally, the following is applied to Latin text (such as English):

• Text is converted to lowercase.
• Numeric digits, '+', '#', and '_' are tokenized as letters.
• Full-width forms are converted to half-width forms.

For more info on Asian language (Chinese, Japanese, and Korean) text segmentation: please search google

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.Tokenizer

input

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

DEFAULT_TOKEN_ATTRIBUTE_FACTORY

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

DEFAULT_ATTRIBUTE_FACTORY

Constructor Summary

Constructors

Constructor and Description
CJKTokenizer(AttributeFactory factory, Reader in) Deprecated.
CJKTokenizer(Reader in) Deprecated. Construct a token stream processing the given input.

Method Summary

Methods

Modifier and Type	Method and Description
void	end() Deprecated.
boolean	incrementToken() Deprecated. Returns true for the next token in the stream, or false at EOS.
void	reset() Deprecated.

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

CJKTokenizer

public CJKTokenizer(Reader in)

Deprecated.

Construct a token stream processing the given input.

Parameters:

in - I/O reader

CJKTokenizer

public CJKTokenizer(AttributeFactory factory,
            Reader in)

Deprecated.

Method Detail

incrementToken

public boolean incrementToken()
                       throws IOException

Deprecated.

Returns true for the next token in the stream, or false at EOS. See http://java.sun.com/j2se/1.3/docs/api/java/lang/Character.UnicodeBlock.html for detail.

Specified by:

incrementToken in class TokenStream

Returns:

false for end of stream, true otherwise

Throws:

IOException - - throw IOException when read error
happened in the InputStream

end

public final void end()
               throws IOException

Deprecated.

Overrides:

end in class TokenStream

Throws:

IOException

reset

public void reset()
           throws IOException

Deprecated.

Overrides:

reset in class Tokenizer

Throws:

IOException