Event.java

package org.jdiameter.server.impl.app.cca;

import org.jdiameter.api.app.AppAnswerEvent;
import org.jdiameter.api.app.AppEvent;
import org.jdiameter.api.app.AppRequestEvent;
import org.jdiameter.api.app.StateEvent;
import org.jdiameter.api.cca.events.JCreditControlAnswer;
import org.jdiameter.api.cca.events.JCreditControlRequest;

public class Event implements StateEvent {

	public enum Type {
		RECEIVED_EVENT, SENT_EVENT_RESPONSE, RECEIVED_INITIAL, SENT_INITIAL_RESPONSE, RECEIVED_UPDATE, SENT_UPDATE_RESPONSE, RECEIVED_TERMINATE, SENT_TERMINATE_RESPONSE,
		// These are minigles, no transition happens, no state resources, timers
		SENT_RAR, RECEIVED_RAA;
	}

	Type type;
	AppRequestEvent request;
	AppAnswerEvent answer;

	Event(Type type) {
		this.type = type;
	}

	Event(Type type, AppRequestEvent request, AppAnswerEvent answer) {
		this.type = type;
		this.answer = answer;
		this.request = request;
	}

	Event(boolean isRequest, JCreditControlRequest request,
			JCreditControlAnswer answer) {

		this.answer = answer;
		this.request = request;
		/**
		 * <pre>
		 * 8.3.  CC-Request-Type AVP
		 * 
		 *     The CC-Request-Type AVP (AVP Code 416) is of type Enumerated and
		 *     contains the reason for sending the credit-control request message.
		 *     It MUST be present in all Credit-Control-Request messages.  The
		 *     following values are defined for the CC-Request-Type AVP:
		 * 
		 *     INITIAL_REQUEST                 1
		 *     UPDATE_REQUEST                  2
		 *     TERMINATION_REQUEST             3
		 *     EVENT_REQUEST                   4
		 * </pre>
		 */
		if (isRequest) {
			switch (request.getRequestTypeAVPValue()) {
			case 1:
				type = Type.RECEIVED_INITIAL;
				break;
			case 2:
				type = Type.RECEIVED_UPDATE;
				break;
			case 3:
				type = Type.RECEIVED_TERMINATE;
				break;
			case 4:
				type = Type.RECEIVED_EVENT;
				break;
			default:
				throw new IllegalArgumentException(
						"Wrong value off avp code 416 or avp not present!!!");
			}
		} else {
			switch (answer.getRequestTypeAVPValue()) {
			case 1:
				type = Type.SENT_INITIAL_RESPONSE;
				break;
			case 2:
				type = Type.SENT_UPDATE_RESPONSE;
				break;
			case 3:
				type = Type.SENT_TERMINATE_RESPONSE;
				break;
			case 4:
				type = Type.SENT_EVENT_RESPONSE;
				break;
			default:
				throw new IllegalArgumentException(
						"Wrong value off avp code 416 or avp not present");
			}
		}
	}

	public <E> E encodeType(Class<E> eClass) {
		return eClass == Event.Type.class ? (E) type : null;
	}

	public Enum getType() {
		return type;
	}

	public int compareTo(Object o) {
		return 0;
	}

	public Object getData() {
	  return this.request != null ? this.request : this.answer; 
	}

	public void setData(Object data) {
    // FIXME: What should we do here?! Is it request or answer?
	}

	public AppEvent getRequest() {
		return request;
	}

	public AppEvent getAnswer() {
		return answer;
	}
}