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This bundle wraps Pi4j (http://pi4j.com) that wraps the native code Wiring Pi (http://wiringpi.com). It wraps these libraries to make them OSGi friendly and allow them to work together with the OSGi enRoute IoT circuit library (osgi.enroute.iot.circuit). The bundle will first use Pi4J to detect on what hardware it runs. If it runs on an appropriate type, it will register a component that can be configured with Metatype. The Metatype defines a full blown configuration template for all the Pi's functions. The GPIO's are registered as components for the circuit. Regardless of the success of the configuration, this bundle will also register a GpioController service, which is the main Pi4J class.

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package com.pi4j.io.gpio.impl;

/*
 * #%L
 * **********************************************************************
 * ORGANIZATION  :  Pi4J
 * PROJECT       :  Pi4J :: Java Library (Core)
 * FILENAME      :  PinImpl.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 java.util.EnumSet;

import com.pi4j.io.gpio.Pin;
import com.pi4j.io.gpio.PinMode;
import com.pi4j.io.gpio.PinPullResistance;

public class PinImpl implements Pin {

    private final int address;
    private final String name ;
    private final String provider;
    private final EnumSet supportedPinPullResistance;
    private final EnumSet supportedPinModes;

    public PinImpl(String provider, int address, String name, EnumSet modes, EnumSet pullResistance) {
        this.provider = provider;
        this.address = address;
        this.name = name;
        this.supportedPinModes = modes;
        this.supportedPinPullResistance = pullResistance;
    }

    public PinImpl(String provider, int address, String name, EnumSet modes) {
        this(provider, address, name, modes, null);
    }
    
    @Override
    public int getAddress() {
        return address;
    }
    
    @Override
    public String getName() {
        return name;
    }

    @Override
    public String getProvider() {
        return provider;
    }
    
    @Override
    public String toString() {
        return name;
    }

    @Override
    public EnumSet getSupportedPinModes() {
        if (supportedPinModes == null) {
            return EnumSet.noneOf(PinMode.class);
        }
        return supportedPinModes;
    }

    @Override
    public EnumSet getSupportedPinPullResistance() {
        if (supportedPinPullResistance == null) {
            return EnumSet.noneOf(PinPullResistance.class);
        }
        return supportedPinPullResistance;
    }
}