001package com.pi4j.io.gpio.trigger; 002 003/* 004 * #%L 005 * ********************************************************************** 006 * ORGANIZATION : Pi4J 007 * PROJECT : Pi4J :: Java Library (Core) 008 * FILENAME : GpioCallbackTrigger.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.GpioPin; 034import com.pi4j.io.gpio.PinState; 035 036import java.util.List; 037import java.util.concurrent.Callable; 038 039@SuppressWarnings("unused") 040public class GpioCallbackTrigger extends GpioTriggerBase { 041 042 private final Callable<Void> callback; 043 044 public GpioCallbackTrigger(Callable<Void> callback) { 045 super(); 046 this.callback = callback; 047 } 048 049 public GpioCallbackTrigger(PinState state, Callable<Void> callback) { 050 super(state); 051 this.callback = callback; 052 } 053 054 public GpioCallbackTrigger(PinState[] states, Callable<Void> callback) { 055 super(states); 056 this.callback = callback; 057 } 058 059 public GpioCallbackTrigger(List<PinState> states, Callable<Void> callback) { 060 super(states); 061 this.callback = callback; 062 } 063 064 @Override 065 public void invoke(GpioPin pin, PinState state) { 066 if (callback != null) { 067 try { 068 callback.call(); 069 } catch (Exception e) { 070 e.printStackTrace(); 071 } 072 } 073 } 074}