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 tokenizer that divides text at whitespace characters as defined by Character.isWhitespace(int). Note: That definition explicitly excludes the non-breaking space. Adjacent sequences of non-Whitespace characters form tokens.

See Also:

UnicodeWhitespaceTokenizer

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.util.CharTokenizer

DEFAULT_MAX_WORD_LEN

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

input

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

DEFAULT_TOKEN_ATTRIBUTE_FACTORY

Constructor Summary

Constructors

Constructor and Description
WhitespaceTokenizer() Construct a new WhitespaceTokenizer.
WhitespaceTokenizer(AttributeFactory factory) Construct a new WhitespaceTokenizer using a given AttributeFactory.
WhitespaceTokenizer(AttributeFactory factory, int maxTokenLen) Construct a new WhitespaceTokenizer using a given AttributeFactory.
WhitespaceTokenizer(int maxTokenLen) Construct a new WhitespaceTokenizer using a given max token length

Method Summary

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, fromSeparatorCharPredicate, fromSeparatorCharPredicate, fromTokenCharPredicate, fromTokenCharPredicate, incrementToken, 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, 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

Constructor Detail

WhitespaceTokenizer

public WhitespaceTokenizer()

Construct a new WhitespaceTokenizer.

WhitespaceTokenizer

public WhitespaceTokenizer(AttributeFactory factory)

Construct a new WhitespaceTokenizer using a given AttributeFactory.

Parameters:

factory - the attribute factory to use for this Tokenizer

WhitespaceTokenizer

public WhitespaceTokenizer(int maxTokenLen)

Construct a new WhitespaceTokenizer using a given max token length

Parameters:

maxTokenLen - maximum token length the tokenizer will emit. Must be greater than 0 and less than MAX_TOKEN_LENGTH_LIMIT (1024*1024)

Throws:

IllegalArgumentException - if maxTokenLen is invalid.

WhitespaceTokenizer

public WhitespaceTokenizer(AttributeFactory factory,
                           int maxTokenLen)

Construct a new WhitespaceTokenizer using a given AttributeFactory.

Parameters:

factory - the attribute factory to use for this Tokenizer

maxTokenLen - maximum token length the tokenizer will emit. Must be greater than 0 and less than MAX_TOKEN_LENGTH_LIMIT (1024*1024)

Throws:

IllegalArgumentException - if maxTokenLen is invalid.

Method Detail

isTokenChar

protected boolean isTokenChar(int c)

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

Specified by:

isTokenChar in class CharTokenizer