Package opennlp.tools.util.featuregen

# Class CharacterNgramFeatureGenerator

java.lang.Object
opennlp.tools.util.featuregen.CharacterNgramFeatureGenerator

All Implemented Interfaces:
  `opennlp.tools.util.featuregen.AdaptiveFeatureGenerator`

public class CharacterNgramFeatureGenerator extends Object implements opennlp.tools.util.featuregen.AdaptiveFeatureGenerator
The `CharacterNgramFeatureGenerator` uses character ngrams to generate features about each token.

See Also:
  - `AdaptiveFeatureGenerator`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `CharacterNgramFeatureGenerator()`
  Initializes a `CharacterNgramFeatureGenerator` with default values for ngrams.
  `CharacterNgramFeatureGenerator(int minLength, int maxLength)`
  Initializes a `CharacterNgramFeatureGenerator` with the specified parameters.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `void`
  `createFeatures(List<String> features, String[] tokens, int index, String[] preds)`

  ### Methods inherited from class java.lang.Object

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

  ### Methods inherited from interface opennlp.tools.util.featuregen.AdaptiveFeatureGenerator

  `clearAdaptiveData, updateAdaptiveData`

- ## Constructor Details

  - ### CharacterNgramFeatureGenerator

    public CharacterNgramFeatureGenerator(int minLength, int maxLength)
    Initializes a `CharacterNgramFeatureGenerator` with the specified parameters.
    Parameters:
      `minLength` - The minimum length to use. Must not be negative.
      `maxLength` - The maximum length to use. Must not be negative.

  - ### CharacterNgramFeatureGenerator

    public CharacterNgramFeatureGenerator()
    Initializes a `CharacterNgramFeatureGenerator` with default values for ngrams. The minimal length is set to `2` and maximum length to a value of `5`.

- ## Method Details

  - ### createFeatures

    public void createFeatures(List<String> features, String[] tokens, int index, String[] preds)
    Specified by:
      `createFeatures` in interface `opennlp.tools.util.featuregen.AdaptiveFeatureGenerator`