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: http://www.pi4j.com/ 012 * ********************************************************************** 013 * %% 014 * Copyright (C) 2012 - 2013 Pi4J 015 * %% 016 * Licensed under the Apache License, Version 2.0 (the "License"); 017 * you may not use this file except in compliance with the License. 018 * You may obtain a copy of the License at 019 * 020 * http://www.apache.org/licenses/LICENSE-2.0 021 * 022 * Unless required by applicable law or agreed to in writing, software 023 * distributed under the License is distributed on an "AS IS" BASIS, 024 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 025 * See the License for the specific language governing permissions and 026 * limitations under the License. 027 * #L% 028 */ 029 030 031import java.util.List; 032import java.util.concurrent.Callable; 033 034import com.pi4j.io.gpio.GpioPin; 035import com.pi4j.io.gpio.PinState; 036 037public class GpioCallbackTrigger extends GpioTriggerBase { 038 039 private final Callable<Void> callback; 040 041 public GpioCallbackTrigger(Callable<Void> callback) { 042 super(); 043 this.callback = callback; 044 } 045 046 public GpioCallbackTrigger(PinState state, Callable<Void> callback) { 047 super(state); 048 this.callback = callback; 049 } 050 051 public GpioCallbackTrigger(PinState[] states, Callable<Void> callback) { 052 super(states); 053 this.callback = callback; 054 } 055 056 public GpioCallbackTrigger(List<PinState> states, Callable<Void> callback) { 057 super(states); 058 this.callback = callback; 059 } 060 061 @Override 062 public void invoke(GpioPin pin, PinState state) { 063 if (callback != null) { 064 try { 065 callback.call(); 066 } catch (Exception e) { 067 e.printStackTrace(); 068 } 069 } 070 } 071}