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:

java.io.Closeable, java.lang.AutoCloseable, java.lang.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 and Description
private RollingCharBuffer	buffer
private java.util.Map<java.lang.Character,FST.Arc<CharsRef>>	cachedRootArcs
private FST.BytesReader	fstReader
private int	inputOff
private FST<CharsRef>	map
private Outputs<CharsRef>	outputs
private CharsRef	replacement
private int	replacementPointer
private 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 and Description
MappingCharFilter(NormalizeCharMap normMap, java.io.Reader in) Default constructor that takes a Reader.

Method Summary

Modifier and Type	Method and 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 Detail

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 java.util.Map<java.lang.Character,FST.Arc<CharsRef>> cachedRootArcs

replacement

private CharsRef replacement

replacementPointer

private int replacementPointer

inputOff

private int inputOff

Constructor Detail

MappingCharFilter

public MappingCharFilter(NormalizeCharMap normMap,
                         java.io.Reader in)

Default constructor that takes a Reader.

Method Detail

reset

public void reset()
           throws java.io.IOException

Overrides:

reset in class java.io.Reader

Throws:

java.io.IOException

read

public int read()
         throws java.io.IOException

Overrides:

read in class java.io.Reader

Throws:

java.io.IOException

read

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

Specified by:

read in class java.io.Reader

Throws:

java.io.IOException