org.apache.lucene.analysis.pattern

Class PatternReplaceFilter

java.lang.Object

org.apache.lucene.util.AttributeSource

org.apache.lucene.analysis.TokenStream

org.apache.lucene.analysis.TokenFilter

org.apache.lucene.analysis.pattern.PatternReplaceFilter

All Implemented Interfaces:

Closeable, AutoCloseable

public final class PatternReplaceFilter
extends TokenFilter

A TokenFilter which applies a Pattern to each token in the stream, replacing match occurances with the specified replacement string.

Note: Depending on the input and the pattern used and the input TokenStream, this TokenFilter may produce Tokens whose text is the empty string.

See Also:

Pattern

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.util.AttributeSource

AttributeSource.State

Field Summary

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

input

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

DEFAULT_TOKEN_ATTRIBUTE_FACTORY

Fields inherited from class org.apache.lucene.util.AttributeSource

DEFAULT_ATTRIBUTE_FACTORY

Constructor Summary

Constructors

Constructor and Description
PatternReplaceFilter(TokenStream in, Pattern p, String replacement, boolean all) Constructs an instance to replace either the first, or all occurances

Method Summary

Methods

Modifier and Type	Method and Description
boolean	incrementToken()

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

close, end, reset

Methods inherited from class org.apache.lucene.util.AttributeSource

addAttribute, addAttributeImpl, captureState, clearAttributes, cloneAttributes, copyTo, equals, getAttribute, getAttributeClassesIterator, getAttributeFactory, getAttributeImplsIterator, hasAttribute, hasAttributes, hashCode, reflectAsString, reflectWith, restoreState, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

PatternReplaceFilter

public PatternReplaceFilter(TokenStream in,
                    Pattern p,
                    String replacement,
                    boolean all)

Constructs an instance to replace either the first, or all occurances

Parameters:

in - the TokenStream to process

p - the patterm to apply to each Token

replacement - the "replacement string" to substitute, if null a blank string will be used. Note that this is not the literal string that will be used, '$' and '\' have special meaning.

all - if true, all matches will be replaced otherwise just the first match.

See Also:

Matcher.quoteReplacement(java.lang.String)

Method Detail

incrementToken

public boolean incrementToken()
                       throws IOException

Specified by:

incrementToken in class TokenStream

Throws:

IOException