org.terrier.indexing.tokenisation

Class UTFTwitterTokeniser

java.lang.Object

org.terrier.indexing.tokenisation.Tokeniser

org.terrier.indexing.tokenisation.UTFTwitterTokeniser

public class UTFTwitterTokeniser
extends Tokeniser

A tokeniser designed for use on tweets. It maintains UTF-8 encoding and keeps mentions

Since:

4.0

Author:

Richard McCreadie

Field Summary

Fields

Modifier and Type	Field and Description
protected static boolean	DROP_LONG_TOKENS Whether tokens longer than MAX_TERM_LENGTH should be dropped.
protected static int	maxNumOfDigitsPerTerm The maximum number of digits that are allowed in valid terms.
protected static int	maxNumOfSameConseqLettersPerTerm The maximum number of consecutive same letters or digits that are allowed in valid terms.

Fields inherited from class org.terrier.indexing.tokenisation.Tokeniser

EMPTY_STREAM

Constructor Summary

Constructors

Constructor and Description
UTFTwitterTokeniser()

Method Summary

Methods

Modifier and Type	Method and Description
TokenStream	tokenise(Reader reader) Tokenises the text obtained from the specified reader.

Methods inherited from class org.terrier.indexing.tokenisation.Tokeniser

getTokeniser, getTokens

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

maxNumOfDigitsPerTerm

protected static final int maxNumOfDigitsPerTerm

The maximum number of digits that are allowed in valid terms.

See Also:

Constant Field Values

maxNumOfSameConseqLettersPerTerm

protected static final int maxNumOfSameConseqLettersPerTerm

The maximum number of consecutive same letters or digits that are allowed in valid terms.

See Also:

Constant Field Values

DROP_LONG_TOKENS

protected static final boolean DROP_LONG_TOKENS

Whether tokens longer than MAX_TERM_LENGTH should be dropped.

See Also:

Constant Field Values

Constructor Detail

UTFTwitterTokeniser

public UTFTwitterTokeniser()

Method Detail

tokenise

public TokenStream tokenise(Reader reader)

Description copied from class: Tokeniser

Tokenises the text obtained from the specified reader.

Specified by:

tokenise in class Tokeniser

Parameters:

reader - Stream of text to be tokenised

Returns:

a TokenStream of the tokens found in the text.