001package com.pi4j.io.gpio.trigger;
002
003/*
004 * #%L
005 * **********************************************************************
006 * ORGANIZATION  :  Pi4J
007 * PROJECT       :  Pi4J :: Java Library (Core)
008 * FILENAME      :  GpioTriggerBase.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.Vector;
038
039public abstract class GpioTriggerBase implements GpioTrigger {
040
041    private List<PinState> states = new Vector<>();
042
043    public GpioTriggerBase() {
044        addPinState(PinState.allStates());
045    }
046
047    public GpioTriggerBase(PinState state) {
048        addPinState(state);
049    }
050
051    public GpioTriggerBase(PinState[] states) {
052        addPinState(states);
053    }
054
055    public GpioTriggerBase(List<PinState> states) {
056        addPinState(states);
057    }
058
059    public void addPinState(PinState... state) {
060        if (state == null || state.length == 0) {
061            throw new IllegalArgumentException("Missing pin state argument.");
062        }
063        for (PinState s : state) {
064            if (!states.contains(s)) {
065                states.add(s);
066            }
067        }
068    }
069
070    public void addPinState(List<? extends PinState> states) {
071        for (PinState state : states) {
072            addPinState(state);
073        }
074    }
075
076    public boolean hasPinState(PinState state) {
077        return states.contains(state);
078    }
079
080    public abstract void invoke(GpioPin pin, PinState state);
081}