Package org.apache.tika.langdetect.tika

Class TikaLanguageDetector

java.lang.Object

org.apache.tika.language.detect.LanguageDetector

org.apache.tika.langdetect.tika.TikaLanguageDetector

public class TikaLanguageDetector
extends org.apache.tika.language.detect.LanguageDetector

This is Tika's original legacy, homegrown language detector. As it is currently implemented, it computes vector distance of trigrams between input string and language models.

Because it works only on trigrams, it is not suitable for short texts.

There are better performing language detectors. This module is still here in the hopes that we'll get around to improving it, because it is elegant and could be fairly trivially improved.

Field Summary

Fields inherited from class org.apache.tika.language.detect.LanguageDetector

mixedLanguages, shortText

Constructor Summary

Constructors

Constructor	Description
TikaLanguageDetector()

Method Summary

Modifier and Type	Method	Description
void	addText(char[] cbuf, int off, int len)
List<org.apache.tika.language.detect.LanguageResult>	detectAll()
boolean	hasModel(String language)
org.apache.tika.language.detect.LanguageDetector	loadModels()
org.apache.tika.language.detect.LanguageDetector	loadModels(Set<String> languages)
void	reset()
org.apache.tika.language.detect.LanguageDetector	setPriors(Map<String,Float> languageProbabilities)	not supported

Methods inherited from class org.apache.tika.language.detect.LanguageDetector

addText, detect, detect, detectAll, getDefaultLanguageDetector, getLanguageDetectors, getLanguageDetectors, hasEnoughText, isMixedLanguages, isShortText, setMixedLanguages, setShortText

Methods inherited from class java.lang.Object

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

Constructor Detail

TikaLanguageDetector

public TikaLanguageDetector()

Method Detail

loadModels

public org.apache.tika.language.detect.LanguageDetector loadModels()
                                                            throws IOException

Specified by:

loadModels in class org.apache.tika.language.detect.LanguageDetector

Throws:

IOException

loadModels

public org.apache.tika.language.detect.LanguageDetector loadModels(Set<String> languages)
                                                            throws IOException

Specified by:

loadModels in class org.apache.tika.language.detect.LanguageDetector

Throws:

IOException

hasModel

public boolean hasModel(String language)

Specified by:

hasModel in class org.apache.tika.language.detect.LanguageDetector

setPriors

public org.apache.tika.language.detect.LanguageDetector setPriors(Map<String,Float> languageProbabilities)
                                                           throws IOException

not supported

Specified by:

setPriors in class org.apache.tika.language.detect.LanguageDetector

Parameters:

languageProbabilities - Map from language to probability

Returns:

Throws:

IOException

reset

public void reset()

Specified by:

reset in class org.apache.tika.language.detect.LanguageDetector

addText

public void addText(char[] cbuf,
                    int off,
                    int len)

Specified by:

addText in class org.apache.tika.language.detect.LanguageDetector

detectAll

public List<org.apache.tika.language.detect.LanguageResult> detectAll()

Specified by:

detectAll in class org.apache.tika.language.detect.LanguageDetector