package javax.megaco.message.descriptor;





import javax.megaco.MethodInvocationException;



/**

 * The EventParam object is a class that shall be used to set the signal

 * descriptor, digitMap descriptor, stream id, whether keep alive is active or

 * not, package name, event id and the associated parameter names and values.

 * The class optionally provides interface to specify the package name, item

 * name and the associated parameters in the string format. This is an

 * independent class derived from java.util.Object and shall not have any

 * derived classes.

 */

public class EventParam {



	private SignalDescriptor signalDescriptor = null;

	private Integer streamId = null;

	private Boolean keepActive = new Boolean(false);

	private DigitMapDescriptor digitMapDescriptor = new DigitMapDescriptor();



	/**

	 * Constructs an object of type event parameter which shall be used within

	 * the event descriptor.

	 */

	public EventParam() {

		super();

		// TODO Auto-generated constructor stub

	}



	/**

	 * The method can be used to get the signal descriptor.

	 * 

	 * @return signalDesc - The reference to the object corresponding to the

	 *         signal descriptor. This shall be returned only if the signal

	 *         descriptor is present in the event parameter of the event

	 *         descriptor.

	 */

	public SignalDescriptor getSignalDescriptor() {

		return this.signalDescriptor;

	}



	/**

	 * The method can be used to get the embedded digit map name in the event

	 * descriptor. Only one of digit map name or digit map value shall be set.

	 * 

	 * @return The reference to the embedded digitMap name. If this value is not

	 *         set, then this method would return NULL.

	 */

	public java.lang.String getDigitMapName() {

		return this.digitMapDescriptor.getDigitMapName();

	}



	/**

	 * The method can be used to get the embedded digit map value in the event

	 * descriptor. Only one of digit map name or digit map value shall be set.

	 * 

	 * @return The reference to the embedded digitMap value. If this value is

	 *         not set, then this method would return NULL.

	 */

	public DigitMapValue getDigitMapValue() {

		return this.digitMapDescriptor.getDigitMapValue();

	}



	/**

	 * The method can be used to get the embedded digit map value in the event

	 * descriptor. Only one of digit map name or digit map value shall be set.

	 * 

	 * @return The reference to the embedded digitMap value. If this value is

	 *         not set, then this method would return NULL.

	 */

	public java.lang.String getDigitMapValueStr() {

		return this.digitMapDescriptor.getDigitMapValueStr();

	}



	/**

	 * The method can be used to get stream id in the event descriptor.

	 * 

	 * @return streamId - The integer value of the stream id shall be returned.

	 *         This shall be returned only if the streamId is present in the

	 *         event parameter of the event descriptor.

	 * @throws IllegalStateException

	 *             - Thrown if streamId has not been set. Thus this method

	 *             should be called only after verifying that the streamId is

	 *             set using isStreamIdPresent()

	 */

	public int getStreamId() throws IllegalStateException {

		if (streamId == null) {

			throw new IllegalStateException("StreamId must be set.");

		}



		return this.streamId.intValue();

	}



	/**

	 * The method can be used to set the signal descriptor within the event

	 * descriptor.

	 * 

	 * @param signalDesc

	 *            - The reference to the object corresponding to the signal

	 *            descriptor.

	 * @throws IllegalArgumentException

	 *             - Thrown if parameters set in the signal descriptor are such

	 *             that the object cannot be set for the event descriptor.

	 */

	public void setSignalDescriptor(SignalDescriptor signalDesc) throws IllegalArgumentException {

		// FIXME: add checks

		this.signalDescriptor = signalDesc;



	}



	/**

	 * The method can be used to set the digit map name. Only one of digit map

	 * name or digit map value shall be set. This automatically sets the value

	 * of digitMap descriptor present in the event parameter object to true. If

	 * digitmap value is already set, then this method would raise an exception.

	 * 

	 * @param digitMapName

	 *            - The reference to the object corresponding to the digitMap

	 *            name.

	 * @throws IllegalArgumentException

	 *             - Thrown if digit Map value has already been set. The

	 *             protocol allows only either of them but not both.

	 */

	public void setDigitMapName(java.lang.String digitMapName) throws IllegalArgumentException {

		if (this.digitMapDescriptor.getDigitMapValue() != null) {

			throw new IllegalArgumentException("Digit map value must not be present when name is set.");

		}

		this.digitMapDescriptor.setDigitMapName(digitMapName);

	}



	/**

	 * The method can be used to set the digit map value. Only one of digit map

	 * name or digit map value shall be set. This automatically sets the value

	 * of digitMap descriptor present in the event parameter object to true. If

	 * digitmap name is already set, then this method would raise an exception.

	 * 

	 * @param digitMapValue

	 *            - The reference to the object corresponding to the digitMap

	 *            value.

	 * @throws IllegalArgumentException

	 *             - Thrown if digit Map name has already been set. The protocol

	 *             allows only either of them but not both.

	 */

	public void setDigitMapValue(DigitMapValue digitMapValue) throws IllegalArgumentException {

		if (this.digitMapDescriptor.getDigitMapName() != null) {

			throw new IllegalArgumentException("Digit map name must not be present when value is set.");

		}

		this.digitMapDescriptor.setDigitMapValue(digitMapValue);

	}



	/**

	 * The method can be used to set the digit map value. Only one of digit map

	 * name or digit map value shall be set. This automatically sets the value

	 * of digitMap descriptor present in the event parameter object to true. If

	 * digitmap name is already set, then this method would raise an exception.

	 * 

	 * @param digitMapValue

	 *            - The reference to the object corresponding to the digitMap

	 *            value.

	 * @throws IllegalArgumentException

	 *             - Thrown if digit Map name has already been set. The protocol

	 *             allows only either of them but not both.

	 */

	public void setDigitMapValueStr(java.lang.String digitMapValue) throws IllegalArgumentException {

		if (this.digitMapDescriptor.getDigitMapName() != null) {

			throw new IllegalArgumentException("Digit map name must not be present when digit map string is set.");

		}

		this.digitMapDescriptor.setDigitMapValueStr(digitMapValue);

	}



	/**

	 * The method can be used to set stream id in the event descriptor. This

	 * automatically sets the value of stream id present in the event parameter

	 * object to true.

	 * 

	 * @param streamId

	 *            - The integer value of the stream id shall be set.

	 * @throws IllegalArgumentException

	 *             - Thrown if streamId is set with an invalid value.

	 */

	public void setStreamId(int streamId) throws IllegalArgumentException {

		// FIXME: what invalid value?

		this.streamId = new Integer(streamId);

	}



	/**

	 * The method can be used to find if the stream id is present in the current

	 * object.

	 * 

	 * @return Returns true if the stream id is present. This needs to be

	 *         checked before getting the stream id from this object.

	 */

	public boolean isStreamIdPresent() {

		return this.streamId != null;

	}



	/**

	 * The method can be used to set Keep Active flag in the event descriptor.

	 */

	public void setKeepActive() {

		this.keepActive = new Boolean(true);

	}



	/**

	 * The method can be used to find if the Keep Active is present in the

	 * current object.

	 * 

	 * @return Returns true if the Keep Active is present.

	 */

	public boolean isKeepActivePresent() {

		return this.keepActive.booleanValue();

	}



	@Override

	public java.lang.String toString() {

		return this.getClass().getSimpleName() + " : StreamId = " + this.streamId + " : KeepActive = " + this.keepActive + " : SignalDesc[ " + this.signalDescriptor + " ] : DigitMapDescriptor[ "

				+ this.digitMapDescriptor + " ]";

	}



}