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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;

/*
 * #%L
 * **********************************************************************
 * ORGANIZATION  :  Pi4J
 * PROJECT       :  Pi4J :: Java Library (Core)
 * FILENAME      :  GpioProviderPinCache.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%
 */

/**
 * This class provides cache for gpio pin instances.
 *
 * @author Robert Savage (http://www.savagehomeautomation.com)
 */
@SuppressWarnings("unused")
public class GpioProviderPinCache {

    private final Pin pin;
    private PinMode mode;
    private PinState state;
    private PinPullResistance resistance;
    private double analogValue = -1;
    private int pwmValue = -1;
    private boolean exported = false; 
    
    public GpioProviderPinCache(Pin pin) {
        this.pin = pin;
    }
    
    @Override
    public String toString() {
        return "PIN [" + pin.getName() + "] CACHE :: mode=" + mode.getName() + "; state=" + state.getName();
    }

    public PinMode getMode() {
        return mode;
    }
    
    public void setMode(PinMode mode) {
        this.mode = mode;
    }
    
    public PinState getState() {
        return state;
    }
    
    public void setState(PinState state) {
        this.state = state;
    }
    
    public PinPullResistance getResistance() {
        return resistance;
    }
    
    public void setResistance(PinPullResistance resistance) {
        this.resistance = resistance;
    }
    
    public double getAnalogValue() {
        return analogValue;
    }
    
    public void setAnalogValue(double value) {
        this.analogValue = value;
    }
    
    public int getPwmValue() {
        return pwmValue;
    }
    
    public void setPwmValue(int value) {
        this.pwmValue = value;
    }
    
    public boolean isExported() {
        return exported;
    }
    
    public void setExported(boolean exported) {
        this.exported = exported;
    }
}