POS.java

package util;

/**
 * Represents part of speech objects.
 * 
 * @author Mark A. Finlayson
 * @version 2.2.3
 * @since JWI 2.0.0
 */
public enum POS {

	COMMA, JJ, NN, NNS, NNPS, NNP, CC, CD, DT, EX, FW, IN, JJR, JJS, LS, MD,
	PDT, POS, PRP, RB, RBR, RBS, RP, SYM, TO, UH, VB, VBD, VBG, VBN, VBZ, WDT,
	WP, WRB, UNKNOWN;

	public static POS parse(String inputPOS) {
		try {
			return valueOf(inputPOS);
		} catch (Exception e) {
			switch (inputPOS) {
				case "n":
					return POS.NN;
				case "a":
					return POS.JJ;
				case "v":
					return POS.VB;
				case "r":
					return POS.RB;

				default:
					break;
			}
			return UNKNOWN;
		}
	}

	public char getTag() {
		String pos = this.name().substring(0, 2);
		switch (pos) {
			case "NN":
				return 'n';
			case "VB":
				return 'v';
			case "RB":
				return 'r';
			case "JJ":
				return 'a';
			default:
				return '_';
		}
	}

	/*
	  
	  *//**
		* Object representing the Noun part of speech.
		* 
		* @since JWI 2.0.0
		*/
	/*
	 * NOUN ("noun", 'n', 1, "noun"),
	 *//**
		* Object representing the Verb part of speech.
		* 
		* @since JWI 2.0.0
		*/
	/*
	 * VERB ("verb", 'v', 2, "verb"),
	 *//**
		* Object representing the Adjective part of speech.
		* 
		* @since JWI 2.0.0
		*/
	/*
	 * ADJECTIVE ("adjective", 'a', 3, "adj", "adjective"),
	 *//**
		* Object representing the Adverb part of speech.
		* 
		* @since JWI 2.0.0
		*/
	/*
	 * ADVERB ("adverb", 'r', 4, "adv", "adverb");
	 * 
	 * // standard WordNet numbering scheme for parts of speech public static
	 * final int NUM_NOUN = 1; public static final int NUM_VERB = 2; public
	 * static final int NUM_ADJECTIVE = 3; public static final int NUM_ADVERB =
	 * 4; public static final int NUM_ADJECTIVE_SATELLITE = 5;
	 * 
	 * // standard character tags for the parts of speech public static final
	 * char TAG_NOUN = 'n'; public static final char TAG_VERB = 'v'; public
	 * static final char TAG_ADJECTIVE = 'a'; public static final char
	 * TAG_ADVERB = 'r'; public static final char TAG_ADJECTIVE_SATELLITE = 's';
	 * 
	 * // final instance fields private final String name; private final char
	 * tag; private final int num; private final Set<String> filenameHints;
	 * 
	 * // private constructor private POS(String name, char tag, int type,
	 * String... patterns) { this.name = name; this.tag = tag; this.num = type;
	 * this.filenameHints = Collections.unmodifiableSet(new
	 * HashSet<String>(Arrays.asList(patterns))); }
	 *//**
		* Returns a set of strings that can be used to identify resource
		* corresponding to objects with this part of speech.
		* 
		* @return an immutable set of resource name hints
		* @since JWI 2.2
		*/
	/*
	 * public Set<String> getResourceNameHints() { return filenameHints; }
	 *//**
		* The tag that is used to indicate this part of speech in Wordnet data
		* files
		* 
		* @return the character representing this part of speech
		* @since JWI 2.0.0
		*/
	/*
	 * public char getTag() { return tag; }
	 *//**
		* Returns the standard WordNet number of this part of speech
		* 
		* @return the standard WordNet number of this part of speech
		* @since JWI 2.0.0
		*/
	/*
	 * public int getNumber(){ return num; }
	 * 
	 * 
	 * (non-Javadoc)
	 * 
	 * @see java.lang.Object#toString()
	 * 
	 * public String toString() { return name; }
	 *//**
		* Returns <code>true</code> if the specified number represents an
		* adjective satellite, namely, if the number is 5; <code>false</code>
		* otherwise
		* 
		* @param num
		*            the number to be checked
		* @return <code>true</code> if the specified number represents an adjective
		*         satellite, namely, if the number is 5; <code>false</code>
		*         otherwise
		* @since JWI 2.0.0
		*/
	/*
	 * public static boolean isAdjectiveSatellite(int num){ return num == 5; }
	 *//**
		* Returns <code>true</code> if the specified character represents an
		* adjective satellite, namely, if the number is 's' or 'S';
		* <code>false</code> otherwise
		* 
		* @param tag
		*            the character to be checked
		* @return <code>true</code> if the specified number represents an adjective
		*         satellite, namely, if the number is 's' or 'S';
		*         <code>false</code> otherwise
		* @since JWI 2.0.0
		*/
	/*
	 * public static boolean isAdjectiveSatellite(char tag){ return tag == 's'
	 * || tag == 'S'; }
	 *//**
		* Retrieves the part of speech object given the number.
		* 
		* @param num
		*            the number for the part of speech
		* @return POS the part of speech object corresponding to the specified tag,
		*         or <code>null</code> if none is found
		* @since JWI 2.0.0
		*/
	/*
	 * public static POS getPartOfSpeech(int num) { switch(num){ case(1): return
	 * NOUN; case(2): return VERB; case(4): return ADVERB; case(5): // special
	 * case, '5' for adjective satellite, fall through case(3): return
	 * ADJECTIVE; } return null; }
	 *//**
		* Retrieves of the part of speech object given the tag. Accepts both
		* lower and upper case characters.
		* 
		* @param tag
		* @return POS the part of speech object corresponding to the specified tag,
		*         or null if none is found
		* @since JWI 2.0.0
		*/
	/*
	 * public static POS getPartOfSpeech(char tag) { switch(tag){ case('N'): //
	 * capital, fall through case('n'): return NOUN; case('V'): // capital, fall
	 * through case('v'): return VERB; case('R'): // capital, fall through
	 * case('r'): return ADVERB; case('s'): // special case, 's' for adjective
	 * satellite, fall through case('S'): // capital, fall through case('A'): //
	 * capital, fall through case('a'): return ADJECTIVE; } return null; }
	 */
}