CharacterCategoryPatternFunction (ClearTK TimeML 2.0.0 API)

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java.lang.Object
- org.cleartk.ml.feature.function.CharacterCategoryPatternFunction<T>

All Implemented Interfaces:

Function<Feature,List<Feature>>, FeatureFunction
```
public class CharacterCategoryPatternFunction<T extends Annotation>
extends Object
implements FeatureFunction
```
A feature extractor that generates a pattern based on the Unicode categories of each of the characters in the annotation text. For example, "A-z0" is an uppercase letter, followed by a dash, followed by a lowercase letter, followed by a digit, and so would get the pattern "LuPdLlNd".
Copyright (c) 2011, Regents of the University of Colorado
All rights reserved.

Author:

Steven Bethard

Nested Class Summary

Nested Classes
Modifier and Type Class and Description

static class CharacterCategoryPatternFunction.PatternType
The type of pattern to generate in feature values.

Constructor Summary

Constructors
Constructor and Description
`CharacterCategoryPatternFunction()` Create the standard feature extractor, where one category is added to the feature value for each character in the text.
`CharacterCategoryPatternFunction(CharacterCategoryPatternFunction.PatternType patternType)` Create a feature extractor with the specified pattern type.

Method Summary

Methods
Modifier and Type	Method and Description
`List<Feature>`	`apply(Feature feature)`
`protected String`	`classifyChar(char c)`
`static <T extends Annotation> NamedFeatureExtractor1<T>`	`createExtractor()`
`static <T extends Annotation> NamedFeatureExtractor1<T>`	`createExtractor(CharacterCategoryPatternFunction.PatternType patternType)`
`String`	`getFeatureName()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.google.common.base.Function
equals

- Constructor Detail
  - CharacterCategoryPatternFunction
```
public CharacterCategoryPatternFunction()
```
    Create the standard feature extractor, where one category is added to the feature value for each character in the text. See CharacterCategoryPatternFunction.PatternType.ONE_PER_CHAR.
  - CharacterCategoryPatternFunction
```
public CharacterCategoryPatternFunction(CharacterCategoryPatternFunction.PatternType patternType)
```
    Create a feature extractor with the specified pattern type. See CharacterCategoryPatternFunction.PatternType for the acceptable pattern types.
    
    Parameters:
    patternType - The type of pattern to generate in feature values.
- Method Detail
  - apply
```
public List<Feature> apply(Feature feature)
```
    Specified by:
    
    apply in interface Function<Feature,List<Feature>>
  - classifyChar
```
protected String classifyChar(char c)
```
  - createExtractor
```
public static <T extends Annotation> NamedFeatureExtractor1<T> createExtractor()
```
  - createExtractor
```
public static <T extends Annotation> NamedFeatureExtractor1<T> createExtractor(CharacterCategoryPatternFunction.PatternType patternType)
```
  - getFeatureName
```
public String getFeatureName()
```

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