Package org.apache.lucene.analysis.cjk

# Class CJKWidthCharFilter

java.lang.Object
java.io.Reader
org.apache.lucene.analysis.CharFilter
org.apache.lucene.analysis.charfilter.BaseCharFilter
org.apache.lucene.analysis.cjk.CJKWidthCharFilter

All Implemented Interfaces:
  `Closeable`, `AutoCloseable`, `Readable`

public class CJKWidthCharFilter extends BaseCharFilter
A `CharFilter` that normalizes CJK width differences:

- Folds fullwidth ASCII variants into the equivalent basic latin
- Folds halfwidth Katakana variants into the equivalent kana

NOTE: this char filter is the exact counterpart of `CJKWidthFilter`.

## Field Summary

### Fields inherited from class org.apache.lucene.analysis.CharFilter

`input`

### Fields inherited from class java.io.Reader

`lock`

## Constructor Summary

Constructors
Constructor
Description
`CJKWidthCharFilter(Reader in)`
Default constructor that takes a `Reader`.

## Method Summary

Modifier and Type
Method
Description
`int`
`read()`
`int`
`read(char[] cbuf, int off, int len)`

### Methods inherited from class org.apache.lucene.analysis.charfilter.BaseCharFilter

`addOffCorrectMap, correct, getLastCumulativeDiff`

### Methods inherited from class org.apache.lucene.analysis.CharFilter

`close, correctOffset`

### Methods inherited from class java.io.Reader

`mark, markSupported, nullReader, read, read, ready, reset, skip, transferTo`

### Methods inherited from class java.lang.Object

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

## Constructor Details

### CJKWidthCharFilter

public CJKWidthCharFilter(Reader in)
Default constructor that takes a `Reader`.

## Method Details

### read

public int read() throws IOException

Overrides:
  `read` in class `Reader`
Throws:
  `IOException`

### read

public int read(char[] cbuf, int off, int len) throws IOException

Specified by:
  `read` in class `Reader`
Throws:
  `IOException`