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/*
 * JBoss, Home of Professional Open Source
 * Copyright 2011, Red Hat, Inc. and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.jdiameter.server.impl.app.s6a;

import org.jdiameter.api.InternalException;
import org.jdiameter.api.app.AppEvent;
import org.jdiameter.api.app.StateEvent;

/**
 * 
 * @author  Alexandre Mendonca 
 * @author  Richard Good 
 * @author  Paul Carter-Brown 
 */
public class Event implements StateEvent {

  enum Type {
    SEND_MESSAGE,
    TIMEOUT_EXPIRES, 
    RECEIVE_AIR,
    RECEIVE_PUR,
    RECEIVE_ULR,
    RECEIVE_NOR,
    RECEIVE_CLA,
    RECEIVE_IDA,
    RECEIVE_DSA,
    RECEIVE_RSA;
  }

  AppEvent request;
  AppEvent answer;
  Type type;

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

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

  public Enum getType() {
    return type;
  }

  public AppEvent getRequest() {
    return request;
  }

  public AppEvent getAnswer() {
    return answer;
  }

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

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

  public void setData(Object data) {
    try {
      if(((AppEvent) data).getMessage().isRequest()) {
        request = (AppEvent) data;
      }
      else {
        answer = (AppEvent) data;
      }
    }
    catch (InternalException e) {
      throw new IllegalArgumentException(e);
    }
  }

}