package javax.megaco.message.descriptor;





import javax.megaco.pkg.PkgEventItem;

import javax.megaco.pkg.PkgItemStr;



/**

 * The class constructs the embedded event descriptor within an event

 * descriptor.

 */

public class EmbedFirstEventParam {



	private int requestId = -1;

	private PkgEventItem eventItem = null;

	private PkgItemStr itemStr = null;



	private EventParam eventParam = null;

	private PkgEventItem pkgEventItem = null;



	/**

	 * 

	 * Constructs a Embedded Event Descriptor with specific request identifier.

	 * 

	 * @param requestId

	 *            - An integer value specifying the request identifier, which

	 *            uniquely identifies the event.

	 * @throws IllegalArgumentException

	 *             - Thrown if request id is set to an invalid value.

	 */

	public EmbedFirstEventParam(int requestId) throws IllegalArgumentException {

		// FIXME: what is invalid value?

		this.requestId = requestId;



	}



	/**

	 * 

	 * Constructs a Embedded Event Descriptor with specific request identifier

	 * and the PkgEventItem object. The PkgEventItem object contains the package

	 * parameters for the event to be detected.

	 * 

	 * @param requestId

	 *            - An integer value specifying the request identifier, which

	 *            uniquely identifies the event.

	 * @param eventItem

	 *            - An PkgEventItem object which identifies the event to be

	 *            detected and corresponding package parameters.

	 * @throws IllegalArgumentException

	 *             - Thrown if request id is set to an invalid value or the

	 *             reference of Package Event Item object is set to NULL.

	 */

	public EmbedFirstEventParam(int requestId, PkgEventItem eventItem) throws IllegalArgumentException {

		this(requestId);

		if (eventItem == null) {

			throw new IllegalArgumentException("PkgEventItem must nto be null");

		}

		this.eventItem = eventItem;

	}



	/**

	 * Constructs a Event Descriptor with specific request identifier and the

	 * PkgItemStr object. The PkgItemStr object contains the package parameters

	 * for the event to be detected in the string format. This constructor will

	 * be used for the MEGACO packages which are not part of the

	 * javax.megaco.pkg package.

	 * 

	 * @param requestId

	 *            - An integer value specifying the request identifier, which

	 *            uniquely identifies the event.

	 * @param eventItem

	 *            - An PkgItemStr object which identifies the event to be

	 *            detected and corresponding package parameters in the string

	 *            format.

	 * @throws IllegalArgumentException

	 *             - Thrown if request id is set to an invalid value or the

	 *             reference of Package Item String object is set to NULL.

	 */

	public EmbedFirstEventParam(int requestId, PkgItemStr eventItemStr) throws IllegalArgumentException {

		this(requestId);



		if (eventItemStr == null) {

			throw new IllegalArgumentException("PkgItemStr must nto be null");

		}

		this.itemStr = eventItemStr;

	}



	/**

	 * This method returns an integer value corresponding to the unique

	 * requested event.

	 * 

	 * @return Returns an integer value that identifies request identifier which

	 *         uniquely identifies the event descriptor.

	 */

	public int getRequestIdentifier() {

		return this.requestId;

	}



	/**

	 * The method can be used the to retrieve the parameters corresponding to

	 * whether the keep alive token is set, the digit map name or digit map

	 * value is set or the embeded signal is set or stream id is set.

	 * 

	 * @return EventParam - object identifier corresponding to the event

	 *         parameters corresponding to the non embedded event id. This

	 *         object interface may optionally be there. If the event parameter

	 *         is not set then this returns a null value.

	 */

	public EventParam getEventParam() {

		return this.eventParam;

	}



	/**

	 * The method can be used the to set the object reference to the event

	 * parameter which has reference to whether keepactive token is present,

	 * signal descriptor, digit map descriptor stream id. In case of an error,

	 * an exception is raised.

	 * 

	 * @param EventParam

	 *            The objectIdentifier corresponding to the event paramater of

	 *            first level event.

	 * @throws IllegalArgumentException

	 *             Thrown if an illegal event is set in the embedded event

	 *             descriptor.

	 */

	public void setEventParam(EventParam eventParam) throws IllegalArgumentException {



		// FIXME: add checks

		// if(eventItem == null)

		// throw new IllegalArgumentException("EventParam must not be null.");

		this.eventParam = eventParam;

	}



	/**

	 * The method can be used to get the package name in the Embedded Event

	 * descriptor. This method gives the package information, the attached event

	 * information and the parameter name and value for the event id.

	 * 

	 * @return The object reference for the Event Item. This has the object

	 *         reference of corresponding megaco package and has the reference

	 *         of the parameter info associated with it. If the parameter has

	 *         not been set, then this method shall return NULL.

	 */

	public PkgEventItem getMegacoPkgEventItem() {

		return this.pkgEventItem;

	}



	/**

	 * The method can be used to get the pkdgName as set in the Embedded Event

	 * descriptor. This method gives the package information, the attached event

	 * information and the parameter name and value. Compared to the

	 * getMegacoPkgEventItem( ) method, this method returnes the package

	 * parameters in the string format.

	 * 

	 * @return The object reference for the megaco package item. This class

	 *         holds information about package name, item name and the

	 *         parameters in the string format. If the parameter has not been

	 *         set, then this method shall return NULL.

	 */

	public PkgItemStr getMegacoPkgItemStr() {

		return this.itemStr;

	}



	/**

	 * The method can be used to set the package name in the Embedded Event

	 * descriptor. The Package Event Item object contains package information,

	 * the attached event information and the parameter name and value for the

	 * event id.

	 * 

	 * @param eventItem

	 *            - The object reference for the Event Item. This has the object

	 *            reference of corresponding megaco package and has the

	 *            reference of the parameter info associated with it.

	 * @throws IllegalArgumentException

	 *             : This exception is raised if the reference of Package Event

	 *             Item passed to this method is NULL.

	 */

	public void setMegacoPkgEventItem(PkgEventItem eventItem) throws IllegalArgumentException {

		if (eventItem == null)

			throw new IllegalArgumentException("PkgEventItem must not be null.");

	}



	/**

	 * The method can be used to set the pkdgName as set in the Embedded Event

	 * descriptor. The Package Item String contains package information, the

	 * attached event information and the parameter name and value. Compared to

	 * the setMegacoPkgEventItem( ) method, this method takes the package

	 * parameters in the string format.

	 * 

	 * @param eventItemStr

	 *            - The object reference for the megaco package item. This class

	 *            holds information about package name, item name and the

	 *            parameters in the string format.

	 * @throws IllegalArgumentException

	 *             : This exception is raised if the reference of package item

	 *             string passed to this method is NULL.

	 */

	public void setMegacoPkgItemStr(PkgItemStr eventItemStr) throws IllegalArgumentException {

		if (eventItemStr == null)

			throw new IllegalArgumentException("PkgItemStr must not be null.");



		this.itemStr = eventItemStr;



	}



}