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Pi4J Java API & Runtime Library
There is a newer version: 2.7.0
package com.pi4j.io.spi;

/*
 * #%L
 * **********************************************************************
 * ORGANIZATION  :  Pi4J
 * PROJECT       :  Pi4J :: Java Library (Core)
 * FILENAME      :  SpiFactory.java  
 * 
 * This file is part of the Pi4J project. More information about 
 * this project can be found here:  http://www.pi4j.com/
 * **********************************************************************
 * %%
 * Copyright (C) 2012 - 2015 Pi4J
 * %%
 * 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.io.spi.impl.SpiDeviceImpl;

import java.io.IOException;

/**
 * SPI factory - it returns instances of {@link com.pi4j.io.spi.SpiDevice} interface.
 *
 * @author Robert Savage (http://www.savagehomeautomation.com)
 */
public class SpiFactory {

    // private constructor
    private SpiFactory() {
        // forbid object construction
    }

    /**
     * Create new SpiDevice instance with a default SPI speed of 1 MHz.
     *
     * @param channel
     *            spi channel to use
     *
     * @return Return a new SpiDevice impl instance.
     *
     * @throws java.io.IOException
     */
    public static SpiDevice getInstance(SpiChannel channel) throws IOException {
        return new SpiDeviceImpl(channel);
    }

    /**
     * Create new SpiDevice instance
     *
     * @param channel
     *            spi channel to use
     * @param mode
     *            spi mode (see http://en.wikipedia.org/wiki/Serial_Peripheral_Interface_Bus#Mode_numbers)
     *
     * @return Return a new SpiDevice impl instance.
     *
     * @throws java.io.IOException
     */
    public static SpiDevice getInstance(SpiChannel channel, SpiMode mode) throws IOException {
        return new SpiDeviceImpl(channel, mode);
    }

    /**
     * Create new SpiDevice instance
     *
     * @param channel
     *            spi channel to use
     * @param speed
     *            spi speed/rate (in Hertz) for channel to communicate at
     *            (range is 500kHz - 32MHz)
     *
     * @return Return a new SpiDevice impl instance.
     *
     * @throws java.io.IOException
     */
    public static SpiDevice getInstance(SpiChannel channel, int speed) throws IOException {
        return new SpiDeviceImpl(channel, speed);
    }

    /**
     * Create new SpiDevice instance
     *
     * @param channel
     *            spi channel to use
     * @param speed
     *            spi speed/rate (in Hertz) for channel to communicate at
     *            (range is 500kHz - 32MHz)
     * @param mode
     *            spi mode (see http://en.wikipedia.org/wiki/Serial_Peripheral_Interface_Bus#Mode_numbers)
     *
     * @return Return a new SpiDevice impl instance.
     *
     * @throws java.io.IOException
     */
    public static SpiDevice getInstance(SpiChannel channel, int speed, SpiMode mode) throws IOException {
        return new SpiDeviceImpl(channel, speed, mode);
    }

}