Package org.carrot2.text.preprocessing

Class CompletePreprocessingPipeline

java.lang.Object

org.carrot2.attrs.AttrComposite

org.carrot2.text.preprocessing.CompletePreprocessingPipeline

All Implemented Interfaces:

AcceptingVisitor, ContextPreprocessor

public class CompletePreprocessingPipeline
extends AttrComposite
implements ContextPreprocessor

Performs a complete preprocessing on the provided documents. The preprocessing consists of the following steps:

1. InputTokenizer
2. CaseNormalizer
3. LanguageModelStemmer
4. StopListMarker
5. PhraseExtractor
6. LabelFilterProcessor
7. DocumentAssigner

Field Summary

Fields

Modifier and Type	Field	Description
protected org.carrot2.text.preprocessing.CaseNormalizer	caseNormalizer	Case normalizer used by the algorithm.
DocumentAssigner	documentAssigner	Document assigner used by the algorithm, contains bindable attributes.
LabelFilterProcessor	labelFilters	Label filtering is a composite of individual filters.
AttrInteger	phraseDfThreshold	Phrase Document Frequency threshold.
protected org.carrot2.text.preprocessing.LanguageModelStemmer	stemming	Stemmer used by the algorithm.
protected org.carrot2.text.preprocessing.StopListMarker	stopListMarker	Stop list marker used by the algorithm, contains bindable attributes.
protected org.carrot2.text.preprocessing.InputTokenizer	tokenizer	Tokenizer used by the algorithm.
AttrInteger	wordDfThreshold	Word Document Frequency threshold.

Fields inherited from class org.carrot2.attrs.AttrComposite

attributes

Constructor Summary

Constructors

Constructor	Description
CompletePreprocessingPipeline()

Method Summary

Modifier and Type	Method	Description
PreprocessingContext	preprocess(Stream<? extends Document> documents, String query, LanguageComponents langModel)

Methods inherited from class org.carrot2.attrs.AttrComposite

accept

Methods inherited from class java.lang.Object

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

Field Detail

wordDfThreshold

public final AttrInteger wordDfThreshold

Word Document Frequency threshold. Words appearing in fewer than wordDfThreshold documents will be ignored.

phraseDfThreshold

public final AttrInteger phraseDfThreshold

Phrase Document Frequency threshold. Phrases appearing in fewer than phraseDfThreshold documents will be ignored.

labelFilters

public LabelFilterProcessor labelFilters

Label filtering is a composite of individual filters.

documentAssigner

public DocumentAssigner documentAssigner

Document assigner used by the algorithm, contains bindable attributes.

caseNormalizer

protected final org.carrot2.text.preprocessing.CaseNormalizer caseNormalizer

Case normalizer used by the algorithm.

stemming

protected final org.carrot2.text.preprocessing.LanguageModelStemmer stemming

Stemmer used by the algorithm.

stopListMarker

protected final org.carrot2.text.preprocessing.StopListMarker stopListMarker

Stop list marker used by the algorithm, contains bindable attributes.

tokenizer

protected final org.carrot2.text.preprocessing.InputTokenizer tokenizer

Tokenizer used by the algorithm.

Constructor Detail

CompletePreprocessingPipeline

public CompletePreprocessingPipeline()

Method Detail

preprocess

public PreprocessingContext preprocess(Stream<? extends Document> documents,
                                       String query,
                                       LanguageComponents langModel)

Specified by:

preprocess in interface ContextPreprocessor