IpControlDisplayInformation.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.pioneeravr.internal.ipcontrolprotocol;

import org.openhab.binding.pioneeravr.internal.PioneerAvrBinding;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Represents the display status message send by the Pioneer AV receiver
 * (response to "?FL" request)
 *
 * @author Rainer Ostendorf
 *
 */

public class IpControlDisplayInformation {

    Boolean volumeDisplay; // 1-light, 0-OFF
    Boolean guidIcon; // 1-light, 0-OFF
    String infoText = new String(""); // the actual display text

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

    /**
     * parse the display status text send from the receiver
     * 
     * @param responsePayload the responses payload, that is without the leading "FL"
     * 
     * @return
     */
    public IpControlDisplayInformation(String responsePayload) {

        volumeDisplay = false;
        guidIcon = false;
        infoText = "";

        // Example from Pioneer docs: When " [)(]DIGITAL EX " is displayed, response command is:
        // FL000005064449474954414C00455800<CR+LF>

        // first byte holds the two special flags
        byte firstByte = (byte) Integer.parseInt(responsePayload.substring(0, 1), 16);

        if ((firstByte & (1 << 0)) == (1 << 0)) {
            guidIcon = true;
        }
        if ((firstByte & (1 << 1)) == (1 << 1)) {
            volumeDisplay = true;
        }

        // convert the ascii values back to string
        StringBuilder sb = new StringBuilder();
        for (int i = 2; i < responsePayload.length() - 1; i += 2) {
            String hexAsciiValue = responsePayload.substring(i, i + 2);
            try {
                sb.append((char) Integer.parseInt(hexAsciiValue, 16));
            } catch (Exception e) {
                logger.error("parsing string failed" + responsePayload + "'", e);
            }
        }
        infoText = sb.toString();
    }

    public String getInfoText() {
        return infoText;
    }

    public void setInfoText(String infoText) {
        this.infoText = infoText;
    }

    public Boolean getVolumeDisplay() {
        return volumeDisplay;
    }

    public Boolean getGuidIcon() {
        return guidIcon;
    }
}