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}