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Pi4J Plugin for the PIGPIO I/O Providers
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package com.pi4j.plugin.pigpio.provider.spi;

/*
 * #%L
 * **********************************************************************
 * ORGANIZATION  :  Pi4J
 * PROJECT       :  Pi4J :: PLUGIN   :: PIGPIO I/O Providers
 * FILENAME      :  PiGpioSpiProviderImpl.java
 *
 * This file is part of the Pi4J project. More information about
 * this project can be found here:  https://pi4j.com/
 * **********************************************************************
 *
 * This program 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 3 of the
 * License, or (at your option) any later version.
 *
 * This program 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 General Lesser Public License for more details.
 *
 * You should have received a copy of the GNU General Lesser Public
 * License along with this program.  If not, see
 * .
 * #L%
 */

import com.pi4j.boardinfo.util.BoardInfoHelper;
import com.pi4j.io.spi.Spi;
import com.pi4j.io.spi.SpiConfig;
import com.pi4j.io.spi.SpiProviderBase;
import com.pi4j.library.pigpio.PiGpio;

/**
 * PiGpioSpiProviderImpl class.
 *
 * @author Robert Savage (http://www.savagehomeautomation.com)
 * @version $Id: $Id
 */
public class PiGpioSpiProviderImpl extends SpiProviderBase implements PiGpioSpiProvider {

    final PiGpio piGpio;

    /**
     * Constructor for PiGpioSpiProviderImpl.
     *
     * @param piGpio a {@link com.pi4j.library.pigpio.PiGpio} object.
     */
    public PiGpioSpiProviderImpl(PiGpio piGpio) {
        this.id = ID;
        this.name = NAME;
        this.piGpio = piGpio;
    }

    @Override
    public int getPriority() {
        // the Pigpio driver should be higher priority when NOT on RP1 chip.
        return BoardInfoHelper.usesRP1() ? 50 : 100;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public Spi create(SpiConfig config) {
        synchronized (this.piGpio) {
            // initialize the PIGPIO library
            if (!piGpio.isInitialized())
                piGpio.initialize();

            // create new I/O instance based on I/O config
            PiGpioSpi spi = new PiGpioSpi(piGpio, this, config);
            this.context.registry().add(spi);
            return spi;
        }
    }
}