booktradingontology.java

JADE实例——多Agent系统展示(图书交易系统)

package bookTrading.ontology;

import jade.content.onto.*;
import jade.content.schema.*;

public class BookTradingOntology extends Ontology
	implements BookTradingVocabulary {
	//The name identifying this ontology
	public static final String ONTOLOGY_NAME = "Book-trading-ontology";
		
	//The singleton instance of this ontology
	private static Ontology theInstance = new BookTradingOntology();
	
	//Retrieve the singleton Book-trading ontology instance
	public static Ontology getInstance(){
		return theInstance;
	}
	
	// Private constructor
	private BookTradingOntology(){
		// The Book-trading ontology extends the basic ontology
		super(ONTOLOGY_NAME, BasicOntology.getInstance());
		try {
			add(new ConceptSchema(BOOK), Book.class);
			add(new PredicateSchema(COSTS), Costs.class);
			add(new AgentActionSchema(SELL), Sell.class);
			// Structure of the schema for the Book concept
			//ConceptSchema cs = (ConceptSchema) getSchema(ITEM);
			ConceptSchema cs = (ConceptSchema)getSchema(BOOK);
			cs.add(BOOK_TITLE, (PrimitiveSchema)
					getSchema(BasicOntology.STRING));
			cs.add(BOOK_AUTHORS, (PrimitiveSchema)
					getSchema(BasicOntology.STRING), 0,
					ObjectSchema.UNLIMITED);
			cs.add(BOOK_EDITOR, (PrimitiveSchema)
					getSchema(BasicOntology.STRING), ObjectSchema.OPTIONAL);
			
			// Structure of the schema for the Costs predicate
			PredicateSchema ps = (PredicateSchema) getSchema(COSTS);
			ps.add(COSTS_ITEM, (ConceptSchema)getSchema(BOOK));
			ps.add(COSTS_PRICE, getSchema(BasicOntology.FLOAT));
			
			// Structure of the schema for the Sell agent action
			AgentActionSchema as = (AgentActionSchema) getSchema(SELL);
			as.add(SELL_ITEM, (ConceptSchema) getSchema(BOOK));
		}
		catch (OntologyException oe) {
			oe.printStackTrace();
		}
	}
}