AckMsg.java

/**
 * Copyright (c) 2010-2016 by the respective copyright holders.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 */
package org.openhab.binding.maxcul.internal.messages;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Message class to handle ACK/NACK
 *
 * @author Paul Hampson (cyclingengineer)
 * @since 1.6.0
 */
public class AckMsg extends BaseMsg {

    final static private int ACK_MSG_PAYLOAD_LEN = 2;
    private boolean isNack;

    private static final Logger logger = LoggerFactory.getLogger(AckMsg.class);

    public AckMsg(String rawMsg) {
        super(rawMsg);
        if (this.payload.length == ACK_MSG_PAYLOAD_LEN) {
            isNack = (this.payload[0] == 0x81);
        } else {
            logger.error("Got " + this.msgType + " message with incorrect length!");
        }
        /* TODO should probably check if it's a 0x01 for ACK */
    }

    public AckMsg(byte msgCount, byte msgFlag, byte groupId, String srcAddr, String dstAddr, boolean isNack) {
        super(msgCount, msgFlag, MaxCulMsgType.ACK, groupId, srcAddr, dstAddr);

        byte[] payload = new byte[ACK_MSG_PAYLOAD_LEN];
        payload[0] = 0x01;
        if (isNack) {
            payload[0] |= 0x80; // make 0x81 for NACK
        }
        super.appendPayload(payload);
        this.printDebugPayload();
    }

    public boolean getIsNack() {
        return isNack;
    }

    @Override
    protected void printFormattedPayload() {
        logger.debug("\tIs ACK?                  => " + (!this.isNack));
        logger.debug("\tUnknown ACK payload byte => " + this.payload[1]);
    }
}