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: https://www.pi4j.com/ 012 * ********************************************************************** 013 * %% 014 * Copyright (C) 2012 - 2019 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}