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`