package javax.megaco.association;



import java.io.Serializable;



/**

 * Service change method constants used in package javax.megaco.association.

 * This forms the class for the Service change method parameters of the Jain

 * Megaco package.

 */

public class SrvChngMethod implements Serializable {



	/**

	 * Identifies the service change method towards the peer shall be graceful.

	 */

	public final static int M_GRACEFUL = 1;

	/**

	 * Identifies the service change method towards the peer shall be forced.

	 */

	public final static int M_FORCED = 2;

	/**

	 * Identifies the service change method towards the peer shall be restart.

	 */

	public final static int M_RESTART = 3;

	/**

	 * Identifies the service change method towards the peer shall be

	 * disconnected.

	 */

	public final static int M_DISCONNECTED = 4;

	/**

	 * Identifies the service change method towards the peer shall be handoff.

	 */

	public final static int M_HANDOFF = 5;

	/**

	 * Identifies the service change method towards the peer shall be failover.

	 */

	public final static int M_FAILOVER = 6;

	/**

	 * Identifies the service change method towards the peer shall be an

	 * extended value.

	 */

	public final static int M_EXTENSION = 7;



	/**

	 * Identifies a SrvChngMethod object that constructs the class with the

	 * constant M_GRACEFUL.

	 */

	public final static SrvChngMethod GRACEFUL = new SrvChngMethod(M_GRACEFUL);

	/**

	 * Identifies a SrvChngMethod object that constructs the class with the

	 * constant M_FORCED.

	 */

	public final static SrvChngMethod FORCED = new SrvChngMethod(M_FORCED);

	/**

	 * Identifies a SrvChngMethod object that constructs the class with the

	 * constant M_RESTART.

	 */

	public final static SrvChngMethod RESTART = new SrvChngMethod(M_RESTART);

	/**

	 * Identifies a SrvChngMethod object that constructs the class with the

	 * constant M_DISCONNECTED.

	 */

	public final static SrvChngMethod DISCONNECTED = new SrvChngMethod(M_DISCONNECTED);

	/**

	 * Identifies a SrvChngMethod object that constructs the class with the

	 * constant M_HANDOFF.

	 */

	public final static SrvChngMethod HANDOFF = new SrvChngMethod(M_HANDOFF);

	/**

	 * Identifies a SrvChngMethod object that constructs the class with the

	 * constant M_FAILOVER.

	 */

	public final static SrvChngMethod FAILOVER = new SrvChngMethod(M_FAILOVER);

	/**

	 * Identifies a SrvChngMethod object that constructs the class with the

	 * constant {@link javax.megaco.association.SrvChngMethod.M_EXTENSION}.

	 */

	public final static SrvChngMethod EXTENSION = new SrvChngMethod(M_EXTENSION);



	private int srvChngMethodId = -1;



	/**

	 * Constructs a class initialised with value service_change_method as passed

	 * to it in the constructor.

	 * 

	 * @param service_change_method

	 */

	private SrvChngMethod(int service_change_method) {

		this.srvChngMethodId = service_change_method;

	}



	/**

	 * This method returns one of the static field constants defined in this

	 * class.

	 * 

	 * @return Returns an integer value that identifies the service change

	 *         method.

	 */

	public int getSrvChngMethodId() {

		return this.srvChngMethodId;

	}



	/**

	 * Returns reference of the SrvChngMethod object that identifies the service

	 * change method as value passed to this method.

	 * 

	 * @param value

	 *            - It is one of the possible values of the static constant that

	 *            this class provides.

	 * @return Returns reference of the SrvChngMethod object.

	 * @throws IllegalArgumentException

	 *             - If the value passed to this method is invalid, then this

	 *             exception is raised.

	 */

	public static SrvChngMethod getObject(int value) throws IllegalArgumentException {



		switch (value) {

		case M_GRACEFUL:

			return GRACEFUL;

		case M_FORCED:

			return FORCED;

		case M_RESTART:

			return RESTART;

		case M_DISCONNECTED:

			return DISCONNECTED;

		case M_HANDOFF:

			return HANDOFF;

		case M_FAILOVER:

			return FAILOVER;

		case M_EXTENSION:

			return EXTENSION;



		default:

			throw new IllegalArgumentException("Wrogn value passed, there is no change method with code: " + value);

		}



	}



	/**

	 * This method must be implemented to perform instance substitution during

	 * serialization. This method is required for reference comparison. This

	 * method if not implimented will simply fail each time we compare an

	 * Enumeration value against a de-serialized Enumeration instance.

	 * 

	 * @return

	 */

	private Object readResolve() {

		return this.getObject(this.srvChngMethodId);

	}



	@Override

	public String toString() {

		switch (this.srvChngMethodId) {

		case M_GRACEFUL:

			return "SrvChngMethod[SVC_CHNG_METHOD_GRACEFUL]";

		case M_FORCED:

			return "SrvChngMethod[SVC_CHNG_METHOD_FORCED]";



		case M_RESTART:

			return "SrvChngMethod[SVC_CHNG_METHOD_RESTART]";



		case M_DISCONNECTED:

			return "SrvChngMethod[SVC_CHNG_METHOD_DISCONNECTED]";



		case M_HANDOFF:

			return "SrvChngMethod[SVC_CHNG_METHOD_HANDOFF]";



		case M_FAILOVER:

			return "SrvChngMethod[SVC_CHNG_METHOD_FAILOVER]";



		case M_EXTENSION:

			return "SrvChngMethod[SVC_CHNG_METHOD_EXTENSION]";



		default:

			return "SrvChngMethod[" + this.srvChngMethodId + "]";

		}

	}



}