org.apache.lucene.analysis.core

Class WhitespaceTokenizer

java.lang.Object

org.apache.lucene.util.AttributeSource

org.apache.lucene.analysis.TokenStream

org.apache.lucene.analysis.Tokenizer

org.apache.lucene.analysis.util.CharTokenizer

org.apache.lucene.analysis.core.WhitespaceTokenizer

All Implemented Interfaces:

Closeable, AutoCloseable

public final class WhitespaceTokenizer
extends CharTokenizer

A WhitespaceTokenizer is a tokenizer that divides text at whitespace. Adjacent sequences of non-Whitespace characters form tokens.

You may specify the Version compatibility when creating WhitespaceTokenizer:

• As of 3.1, CharTokenizer uses an int based API to normalize and detect token characters. See CharTokenizer.isTokenChar(int) and CharTokenizer.normalize(int) for details.

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.Tokenizer

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
WhitespaceTokenizer(AttributeFactory factory, Reader in) Construct a new WhitespaceTokenizer using a given AttributeFactory.
WhitespaceTokenizer(Reader in) Construct a new WhitespaceTokenizer.
WhitespaceTokenizer(Version matchVersion, AttributeFactory factory, Reader in) Deprecated. Use WhitespaceTokenizer(AttributeFactory, Reader)
WhitespaceTokenizer(Version matchVersion, Reader in) Deprecated. Use WhitespaceTokenizer(Reader)

Method Summary

Methods

Modifier and Type	Method and Description
protected boolean	isTokenChar(int c) Collects only characters which do not satisfy Character.isWhitespace(int).

Methods inherited from class org.apache.lucene.analysis.util.CharTokenizer

end, incrementToken, normalize, reset

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

close, correctOffset, setReader

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

WhitespaceTokenizer

public WhitespaceTokenizer(Reader in)

Construct a new WhitespaceTokenizer. * @param matchVersion Lucene version to match See above

Parameters:

in - the input to split up into tokens

WhitespaceTokenizer

@Deprecated
public WhitespaceTokenizer(Version matchVersion,
                              Reader in)

Deprecated. Use WhitespaceTokenizer(Reader)

WhitespaceTokenizer

public WhitespaceTokenizer(AttributeFactory factory,
                   Reader in)

Construct a new WhitespaceTokenizer using a given AttributeFactory.

Parameters:

factory - the attribute factory to use for this Tokenizer

in - the input to split up into tokens

WhitespaceTokenizer

@Deprecated
public WhitespaceTokenizer(Version matchVersion,
                              AttributeFactory factory,
                              Reader in)

Deprecated. Use WhitespaceTokenizer(AttributeFactory, Reader)

Method Detail

isTokenChar

protected boolean isTokenChar(int c)

Collects only characters which do not satisfy Character.isWhitespace(int).

Specified by:

isTokenChar in class CharTokenizer