Module org.apache.lucene.analysis.common

Package org.apache.lucene.analysis.classic

Class ClassicFilter

java.lang.Object

org.apache.lucene.util.AttributeSource

org.apache.lucene.analysis.TokenStream

org.apache.lucene.analysis.TokenFilter

org.apache.lucene.analysis.classic.ClassicFilter

All Implemented Interfaces:

Closeable, AutoCloseable, Unwrappable<TokenStream>

public class ClassicFilter
extends TokenFilter

Normalizes tokens extracted with ClassicTokenizer.

Nested Class Summary

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

AttributeSource.State

Field Summary

Fields

Modifier and Type	Field	Description
private static final String	ACRONYM_TYPE
private static final String	APOSTROPHE_TYPE
private final CharTermAttribute	termAtt
private final TypeAttribute	typeAtt

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

input

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

DEFAULT_TOKEN_ATTRIBUTE_FACTORY

Constructor Summary

Constructors

Constructor	Description
ClassicFilter(TokenStream in)	Construct filtering in.

Method Summary

Modifier and Type	Method	Description
final boolean	incrementToken()	Returns the next token in the stream, or null at EOS.

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

close, end, reset, unwrap

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

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

Methods inherited from class java.lang.Object

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

Field Details

APOSTROPHE_TYPE

private static final String APOSTROPHE_TYPE

ACRONYM_TYPE

private static final String ACRONYM_TYPE

typeAtt

private final TypeAttribute typeAtt

termAtt

private final CharTermAttribute termAtt

Constructor Details

ClassicFilter

public ClassicFilter(TokenStream in)

Construct filtering in.

Method Details

incrementToken

public final boolean incrementToken()
                             throws IOException

Returns the next token in the stream, or null at EOS.

Removes 's from the end of words.

Removes dots from acronyms.

Specified by:

incrementToken in class TokenStream

Returns:

false for end of stream; true otherwise

Throws:

IOException