language.java

toocom源代码,主要应用在本体匹配方面!

package toocom.ocgl;

import java.util.*;

/**
 * This class allows to manage several languages to specify terms for the conceptual objects 
 * in an ontology. Each language is characterized by a label, which must be different from the 
 * labels of the others languages.
 *
 * @author Fr閐閞ic F黵st
 */
public class Language{

	private static LinkedList languages = new LinkedList();
	private String label;
	
	public static final Language ENGLISH = new Language(CGConstants.ENGLISH);
	public static final Language FRENCH = new Language(CGConstants.FRENCH);
	public static final Language GERMAN = new Language(CGConstants.GERMAN);
	public static final Language SPANISH = new Language(CGConstants.SPANISH);
	
	public Language(String label){
		if(!Language.exists(label)){
			this.label = label;
			Language.languages.add(this);
		}
	}
	
	public String getLabel(){
		return this.label;
	}
	
	/** Returns true if a language with the given label already exists. */
	public static boolean exists(String label){
		for(int i = 0;i < Language.languages.size();i ++){
			if(((Language) Language.languages.get(i)).getLabel().equals(label)) return true;
		}
		return false;
	}
	
	/** Returns the list of all available languages. */
	public static LinkedList getAllLanguages(){
		return Language.languages;
	}
	
	/** Two languages are equals if they have the same label. */
	public boolean equals(Language l){
		return (this.label.equals(l.getLabel()));	
	}
	
	public String toString(){
		return label;
	}
	
	/** Returns the language with the specified label, null if any. */
	public static Language getLanguage(String label){
		for(Iterator i = Language.getAllLanguages().iterator();i.hasNext();){
			Language l = (Language) i.next();
			if(l.getLabel().equals(label)) return l;
		}
		return null;
	}

}