org.apache.lucene.analysis

Class BaseCharFilter

java.lang.Object

java.io.Reader

org.apache.lucene.analysis.CharStream

org.apache.lucene.analysis.CharFilter

org.apache.lucene.analysis.BaseCharFilter

All Implemented Interfaces:

Closeable, AutoCloseable, Readable

Direct Known Subclasses:

MappingCharFilter

public abstract class BaseCharFilter
extends CharFilter

Base utility class for implementing a CharFilter. You subclass this, and then record mappings by calling addOffCorrectMap(int, int), and then invoke the correct method to correct an offset.

Field Summary

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

input

Fields inherited from class java.io.Reader

lock

Constructor Summary

Constructors

Constructor and Description
BaseCharFilter(CharStream in)

Method Summary

Methods

Modifier and Type	Method and Description
protected void	addOffCorrectMap(int off, int cumulativeDiff)
protected int	correct(int currentOff) Retrieve the corrected offset.
protected int	getLastCumulativeDiff()

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

close, correctOffset, mark, markSupported, read, reset

Methods inherited from class java.io.Reader

read, read, read, ready, skip

Methods inherited from class java.lang.Object

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

Constructor Detail

BaseCharFilter

public BaseCharFilter(CharStream in)

Method Detail

correct

protected int correct(int currentOff)

Retrieve the corrected offset.

Overrides:

correct in class CharFilter

Parameters:

currentOff - current offset

Returns:

corrected offset

getLastCumulativeDiff

protected int getLastCumulativeDiff()

addOffCorrectMap

protected void addOffCorrectMap(int off,
                    int cumulativeDiff)