pstlab / KOaLaR

import java.util.ArrayList;

import java.util.List;

import org.apache.jena.rdf.model.Model;

/**

 * 

 * @author alessandro

 *

 */

public abstract class EnvironmentReasoner 

{

	private final List<EnvironmentListener> listeners;

	/**

	 * 

	 */

	public EnvironmentReasoner() {

		this.listeners = new ArrayList<EnvironmentListener>();

	}

	/**

	 * 

	 * @param listener

	 */

	public void subscribe(EnvironmentListener listener) {

		synchronized (this.listeners) {

			this.listeners.add(listener);

		}

	}

	/**

	 * 

	 */

	protected void publish() {

		// check subscribers

		synchronized (this.listeners) {

			for (EnvironmentListener listener : this.listeners) {

				// update listener

				listener.update();

			}

		}

	}

	/**

	 * 

	 * @param envFilePath

	 */

	public abstract void init(String envFilePath);

	/**

	 * 

	 * @return

	 */