Package org.apache.lucene.analysis.charfilter

Class MappingCharFilter

java.lang.Object

java.io.Reader

org.apache.lucene.analysis.CharFilter

org.apache.lucene.analysis.charfilter.BaseCharFilter

org.apache.lucene.analysis.charfilter.MappingCharFilter

All Implemented Interfaces:

Closeable, AutoCloseable, Readable

public class MappingCharFilter
extends BaseCharFilter

Simplistic CharFilter that applies the mappings contained in a NormalizeCharMap to the character stream, and correcting the resulting changes to the offsets. Matching is greedy (longest pattern matching at a given point wins). Replacement is allowed to be the empty string.

Field Summary

Fields

Modifier and Type	Field	Description
private final RollingCharBuffer	buffer
private final Map<Character,FST.Arc<CharsRef>>	cachedRootArcs
private final FST.BytesReader	fstReader
private int	inputOff
private final FST<CharsRef>	map
private final Outputs<CharsRef>	outputs
private CharsRef	replacement
private int	replacementPointer
private final FST.Arc<CharsRef>	scratchArc

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

input

Fields inherited from class java.io.Reader

lock

Constructor Summary

Constructors

Constructor	Description
MappingCharFilter(NormalizeCharMap normMap, 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)
void	reset()

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, read, read, ready, skip

Methods inherited from class java.lang.Object

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

Field Details

outputs

private final Outputs<CharsRef> outputs

map

private final FST<CharsRef> map

fstReader

private final FST.BytesReader fstReader

buffer

private final RollingCharBuffer buffer

scratchArc

private final FST.Arc<CharsRef> scratchArc

cachedRootArcs

private final Map<Character,FST.Arc<CharsRef>> cachedRootArcs

replacement

private CharsRef replacement

replacementPointer

private int replacementPointer

inputOff

private int inputOff

Constructor Details

MappingCharFilter

public MappingCharFilter(NormalizeCharMap normMap,
 Reader in)

Default constructor that takes a Reader.

Method Details

reset

public void reset()
           throws IOException

Overrides:

reset in class Reader

Throws:

IOException

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