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/*
 * JBoss, Home of Professional Open Source
 * Copyright 2010, 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.client.impl.app.gx;

import org.jdiameter.api.AvpDataException;
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.gx.events.GxCreditControlAnswer;
import org.jdiameter.api.gx.events.GxCreditControlRequest;

/**
 * @author  Carl-Magnus Björkell 
 */
public class Event implements StateEvent {

    public enum Type {

        SEND_INITIAL_REQUEST, RECEIVED_INITIAL_ANSWER,
        SEND_UPDATE_REQUEST, RECEIVED_UPDATE_ANSWER,
        SEND_TERMINATE_REQUEST, RECEIVED_TERMINATED_ANSWER,
        RECEIVED_RAR, SEND_RAA, Tx_TIMER_FIRED,
        SEND_EVENT_REQUEST, RECEIVE_EVENT_ANSWER;
    }
    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, GxCreditControlRequest request, GxCreditControlAnswer answer) throws AvpDataException {

        this.answer = answer;
        this.request = request;

        if (isRequest) {
            switch (request.getRequestTypeAVPValue()) {
                case 1:
                    type = Type.SEND_INITIAL_REQUEST;
                    break;
                case 2:
                    type = Type.SEND_UPDATE_REQUEST;
                    break;
                case 3:
                    type = Type.SEND_TERMINATE_REQUEST;
                    break;
                case 4:
                    type = Type.SEND_EVENT_REQUEST;
                    break;
                default:
                    throw new RuntimeException("Wrong CC-Request-Type value: " + request.getRequestTypeAVPValue());

            }

        } else {
            switch (answer.getRequestTypeAVPValue()) {
                case 1:
                    type = Type.RECEIVED_INITIAL_ANSWER;
                    break;
                case 2:
                    type = Type.RECEIVED_UPDATE_ANSWER;
                    break;
                case 3:
                    type = Type.RECEIVED_TERMINATED_ANSWER;
                    break;
                case 4:
                    type = Type.RECEIVE_EVENT_ANSWER;
                    break;
                default:
                    throw new RuntimeException("Wrong CC-Request-Type value: " + answer.getRequestTypeAVPValue());
            }
        }
    }

    public Enum getType() {
        return type;
    }

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

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

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