DataTypeBarometricTrend.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.davis.datatypes;

import java.nio.ByteBuffer;
import java.nio.ByteOrder;

import org.openhab.core.library.types.StringType;
import org.openhab.core.types.State;

/**
 * Class to handle voltage values
 *
 * @author Trathnigg Thomas
 * @since 1.6.0
 */
public class DataTypeBarometricTrend implements DavisDataType {

    protected String getTrendText(int n) {
        String trend = null;
        switch (n) {
            case -60:
                trend = "Falling Rapidly";
                break;
            case -20:
                trend = "Falling Slowly";
                break;
            case 0:
                trend = "Steady";
                break;
            case 20:
                trend = "Rising Slowly";
                break;
            case 60:
                trend = "Rising Rapidly";
                break;
            case 80:
                trend = "no trend info available";
                break;
            default:
                trend = "unknown";
                break;
        }
        return trend;
    }

    /**
     * {@inheritDoc}
     */
    public State convertToState(byte[] data, DavisValueType valueType) {
        byte value = ByteBuffer.wrap(data).order(ByteOrder.LITTLE_ENDIAN).get(valueType.getDataOffset());
        return new StringType(getTrendText(value));
    }

}