001package com.pi4j.io.gpio.tasks.impl;
002
003/*
004 * #%L
005 * **********************************************************************
006 * ORGANIZATION  :  Pi4J
007 * PROJECT       :  Pi4J :: Java Library (Core)
008 * FILENAME      :  GpioPulseTaskImpl.java  
009 * 
010 * This file is part of the Pi4J project. More information about 
011 * this project can be found here:  http://www.pi4j.com/
012 * **********************************************************************
013 * %%
014 * Copyright (C) 2012 - 2015 Pi4J
015 * %%
016 * This program is free software: you can redistribute it and/or modify
017 * it under the terms of the GNU Lesser General Public License as
018 * published by the Free Software Foundation, either version 3 of the
019 * License, or (at your option) any later version.
020 * 
021 * This program is distributed in the hope that it will be useful,
022 * but WITHOUT ANY WARRANTY; without even the implied warranty of
023 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
024 * GNU General Lesser Public License for more details.
025 * 
026 * You should have received a copy of the GNU General Lesser Public
027 * License along with this program.  If not, see
028 * <http://www.gnu.org/licenses/lgpl-3.0.html>.
029 * #L%
030 */
031
032
033import com.pi4j.io.gpio.GpioPinDigitalOutput;
034import com.pi4j.io.gpio.PinState;
035
036import java.util.concurrent.Callable;
037
038@SuppressWarnings("unused")
039public class GpioPulseTaskImpl implements Runnable {
040
041    private final GpioPinDigitalOutput pin;
042    private final PinState inactiveState;
043    private final Callable<?> callback;
044
045    public GpioPulseTaskImpl(GpioPinDigitalOutput pin, PinState inactiveState, Callable<?> callback) {
046        this.pin = pin;
047        this.inactiveState = inactiveState;
048        this.callback = callback;
049    }
050
051    public GpioPulseTaskImpl(GpioPinDigitalOutput pin, PinState inactiveState) {
052        this.pin = pin;        
053        this.inactiveState = inactiveState;
054        this.callback = null;
055    }
056
057    public void run() {
058        pin.setState(inactiveState);
059
060        // invoke callback if one was defined
061        if(callback != null){
062            try {
063                callback.call();
064            } catch (Exception e) {
065                e.printStackTrace();
066            }
067        }
068    }
069}