Package affective.core

Class PolarityLexiconEvaluator

java.lang.Object

affective.core.LexiconEvaluator

affective.core.PolarityLexiconEvaluator

All Implemented Interfaces:

java.io.Serializable

public class PolarityLexiconEvaluator
extends LexiconEvaluator

This class is used for evaluating the polarity lexicons with positive and negative nominal entries.

Version:

$Revision: 1 $

Author:

Felipe Bravo-Marquez (fbravoma@waikato.ac.nz)

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
PolarityLexiconEvaluator(java.lang.String file, java.lang.String name)	initializes the Object

Method Summary

Modifier and Type	Method	Description
java.util.Map<java.lang.String,java.lang.Double>	evaluateTweet(java.util.List<java.lang.String> tokens)	Calculates lexicon-based feature values from a list of tokens
java.util.Map<java.lang.String,java.lang.String>	getDict()	Gets the dictionary mapping the words to their sentiment
void	processDict()	initializes the dictionary
java.lang.String	retrieveValue(java.lang.String word)	returns the sentiment associated with a word

Methods inherited from class affective.core.LexiconEvaluator

getFeatureNames

Methods inherited from class java.lang.Object

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

Constructor Detail

PolarityLexiconEvaluator

public PolarityLexiconEvaluator(java.lang.String file,
                                java.lang.String name)

initializes the Object

Parameters:

file - the file with the lexicon

name - the prefix for all the attributes calculated from this lexicon

Method Detail

processDict

public void processDict()
                 throws java.io.IOException

Description copied from class: LexiconEvaluator

initializes the dictionary

Specified by:

processDict in class LexiconEvaluator

Throws:

java.io.IOException - in case of wrong file

retrieveValue

public java.lang.String retrieveValue(java.lang.String word)

returns the sentiment associated with a word

Parameters:

word - the input word

Returns:

the value for the word

evaluateTweet

public java.util.Map<java.lang.String,java.lang.Double> evaluateTweet(java.util.List<java.lang.String> tokens)

Description copied from class: LexiconEvaluator

Calculates lexicon-based feature values from a list of tokens

Specified by:

evaluateTweet in class LexiconEvaluator

Parameters:

tokens - a tokenized tweet

Returns:

a mapping between attribute names and their scores

getDict

public java.util.Map<java.lang.String,java.lang.String> getDict()

Gets the dictionary mapping the words to their sentiment

Returns:

the dictionary.