com.aliasi.tokenizer

Class CharacterTokenCategorizer

java.lang.Object

com.aliasi.tokenizer.CharacterTokenCategorizer

All Implemented Interfaces:

TokenCategorizer

public class CharacterTokenCategorizer
extends Object
implements TokenCategorizer

Returns a category for tokens made up out of a single character. Possible categories are LETTER, DIGIT, PUNCTUATION, OTHER, and UNKNOWN. The latter class is for those tokens that are not single characters.

Since:

LingPipe1.0

Version:

4.0.0

Author:

Bob Carpenter

Field Summary

Fields

Modifier and Type	Field and Description
static String	DIGIT_CAT The digit category.
static String	LETTER_CAT The letter category.
static String	OTHER_CAT The other category for non-digits, non-letters and non-punctuation tokens of a single character long.
static String	PUNCTUATION_CAT The punctuation category.
static String	UNKNOWN_CAT The unknown category for tokens not one character long.

Method Summary

Modifier and Type	Method and Description
String[]	categories() Returns a copy of the array of categories used by this categorizer.
String	categorize(String token) Returns the category of the specified token.
String	toString() Returns the name of this class.

Methods inherited from class java.lang.Object

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

Field Detail

UNKNOWN_CAT

public static final String UNKNOWN_CAT

The unknown category for tokens not one character long.

See Also:

Constant Field Values

DIGIT_CAT

public static final String DIGIT_CAT

The digit category.

See Also:

Constant Field Values

LETTER_CAT

public static final String LETTER_CAT

The letter category.

See Also:

Constant Field Values

PUNCTUATION_CAT

public static final String PUNCTUATION_CAT

The punctuation category.

See Also:

Constant Field Values

OTHER_CAT

public static final String OTHER_CAT

The other category for non-digits, non-letters and non-punctuation tokens of a single character long.

See Also:

Constant Field Values

Method Detail

categorize

public String categorize(String token)

Returns the category of the specified token. The result will be UNKNOWN for tokens that are not a single character long. A token that is a single digit will return DIGIT, a single letter LETTER, and punctuation PUNCTUATION. All other single-letter tokens will return OTHER.

Specified by:

categorize in interface TokenCategorizer

Parameters:

token - Token to categorize.

Returns:

Category of specified token.

categories

public String[] categories()

Returns a copy of the array of categories used by this categorizer.

Specified by:

categories in interface TokenCategorizer

Returns:

The array of categories used by this categorizer.

toString

public String toString()

Returns the name of this class.

Overrides:

toString in class Object

Returns:

The name of this class.