Package org.tribuo.data.text.impl

Class NgramProcessor

java.lang.Object

org.tribuo.data.text.impl.NgramProcessor

All Implemented Interfaces:

com.oracle.labs.mlrg.olcut.config.Configurable, com.oracle.labs.mlrg.olcut.provenance.Provenancable<com.oracle.labs.mlrg.olcut.provenance.ConfiguredObjectProvenance>, TextProcessor

public class NgramProcessor
extends Object
implements TextProcessor

A text processor that will generate token ngrams of a particular size.

Constructor Summary

Constructors

Constructor	Description
NgramProcessor(Tokenizer tokenizer, int n, double value)	Creates a processor that will generate token ngrams of size n.

Method Summary

Modifier and Type	Method	Description
com.oracle.labs.mlrg.olcut.provenance.ConfiguredObjectProvenance	getProvenance()
void	postConfig()	Used by the OLCUT configuration system, and should not be called by external code.
List<Feature>	process(String text)	Extracts features from the supplied text.
List<Feature>	process(String tag, String text)	Extracts features from the supplied text.

Methods inherited from class java.lang.Object

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

Constructor Details

NgramProcessor

public NgramProcessor(Tokenizer tokenizer,
 int n,
 double value)

Creates a processor that will generate token ngrams of size n.

Parameters:

tokenizer - The tokenizer to use to process text.

n - the size of the ngram to generate

value - the value we will put in the new features.

Method Details

postConfig

public void postConfig()

Used by the OLCUT configuration system, and should not be called by external code.

Specified by:

postConfig in interface com.oracle.labs.mlrg.olcut.config.Configurable

process

public List<Feature> process(String text)
                      throws TextProcessingException

Description copied from interface: TextProcessor

Extracts features from the supplied text.

Specified by:

process in interface TextProcessor

Parameters:

text - The text to extract.

Returns:

The extracted features.

Throws:

TextProcessingException - If an error occurred during extraction (usually from tokenization).

process

public List<Feature> process(String tag,
 String text)
                      throws TextProcessingException

Description copied from interface: TextProcessor

Extracts features from the supplied text.

Specified by:

process in interface TextProcessor

Parameters:

tag - The feature name tag.

text - The text to extract.

Returns:

The extracted features.

Throws:

TextProcessingException - If an error occurred during extraction (usually from tokenization).

getProvenance

public com.oracle.labs.mlrg.olcut.provenance.ConfiguredObjectProvenance getProvenance()

Specified by:

getProvenance in interface com.oracle.labs.mlrg.olcut.provenance.Provenancable<com.oracle.labs.mlrg.olcut.provenance.ConfiguredObjectProvenance>