org.apache.lucene.analysis.core

Class UnicodeWhitespaceTokenizer

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.UnicodeWhitespaceTokenizer

All Implemented Interfaces:

Closeable, AutoCloseable

public final class UnicodeWhitespaceTokenizer
extends CharTokenizer

A UnicodeWhitespaceTokenizer is a tokenizer that divides text at whitespace. Adjacent sequences of non-Whitespace characters form tokens (according to Unicode's WHITESPACE property).

For Unicode version see: UnicodeProps

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
UnicodeWhitespaceTokenizer() Construct a new UnicodeWhitespaceTokenizer.
UnicodeWhitespaceTokenizer(AttributeFactory factory) Construct a new UnicodeWhitespaceTokenizer using a given AttributeFactory.
UnicodeWhitespaceTokenizer(AttributeFactory factory, int maxTokenLen) Construct a new UnicodeWhitespaceTokenizer using a given AttributeFactory.

Method Summary

Modifier and Type	Method and Description
protected boolean	isTokenChar(int c) Collects only characters which do not satisfy Unicode's WHITESPACE property.

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

end, fromSeparatorCharPredicate, fromSeparatorCharPredicate, fromSeparatorCharPredicate, fromSeparatorCharPredicate, fromTokenCharPredicate, fromTokenCharPredicate, fromTokenCharPredicate, fromTokenCharPredicate, 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, 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

UnicodeWhitespaceTokenizer

public UnicodeWhitespaceTokenizer()

Construct a new UnicodeWhitespaceTokenizer.

UnicodeWhitespaceTokenizer

public UnicodeWhitespaceTokenizer(AttributeFactory factory)

Construct a new UnicodeWhitespaceTokenizer using a given AttributeFactory.

Parameters:

factory - the attribute factory to use for this Tokenizer

UnicodeWhitespaceTokenizer

public UnicodeWhitespaceTokenizer(AttributeFactory factory,
                                  int maxTokenLen)

Construct a new UnicodeWhitespaceTokenizer 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 Unicode's WHITESPACE property.

Specified by:

isTokenChar in class CharTokenizer