com.jalios.jcms.search

Class NGramCategorizer

java.lang.Object

com.jalios.jcms.search.NGramCategorizer

public class NGramCategorizer
extends java.lang.Object

TextCategorizer is able to categorize texts by computing the similarity of the FingerPrint of a text with a collection of the FingerPrints of the categories.

Constructor Summary

Constructors

Constructor and Description
NGramCategorizer()

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.String	categorize(java.lang.String text) Categorizes the text passed to it
java.lang.String	categorize(java.lang.String text, int limit) Categorizes only a certain amount of characters in the text.
java.util.Map<java.lang.String,java.lang.Integer>	getCategoryDistances(java.lang.String text) Categorizes a text but returns a map containing all categories and their distances to the text.
protected void	init() Clears the categories-collection and fills it with the FingerPrints given in the configuration file.

Methods inherited from class java.lang.Object

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

Constructor Detail

NGramCategorizer

public NGramCategorizer()

Method Detail

init

protected void init()

Clears the categories-collection and fills it with the FingerPrints given in the configuration file.

categorize

public java.lang.String categorize(java.lang.String text)

Categorizes the text passed to it

Parameters:

text - text to be categorized

Returns:

the category name given in the configuration file

categorize

public java.lang.String categorize(java.lang.String text,
                          int limit)

Categorizes only a certain amount of characters in the text. recommended when categorizing large texts in order to increase performance.

Parameters:

text - text to be analysed

limit - number of characters to be analysed

Returns:

the category name given in the configuration file

getCategoryDistances

public java.util.Map<java.lang.String,java.lang.Integer> getCategoryDistances(java.lang.String text)

Categorizes a text but returns a map containing all categories and their distances to the text.

Parameters:

text - text to be categorized

Returns:

HashMap with categories as keys and distances as values