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:  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.Vector;
033
034import com.pi4j.io.gpio.GpioPin;
035import com.pi4j.io.gpio.PinState;
036
037public abstract class GpioTriggerBase implements GpioTrigger {
038
039    private List<PinState> states = new Vector<PinState>();
040
041    public GpioTriggerBase() {
042        addPinState(PinState.allStates());
043    }
044    
045    public GpioTriggerBase(PinState state) {
046        addPinState(state);
047    }
048
049    public GpioTriggerBase(PinState[] states) {
050        addPinState(states);
051    }
052
053    public GpioTriggerBase(List<PinState> states) {
054        addPinState(states);
055    }
056    
057    public void addPinState(PinState... state) {
058        if (state == null || state.length == 0) {
059            throw new IllegalArgumentException("Missing pin state argument.");
060        }
061        for (PinState s : state) {
062            if (!states.contains(s)) {
063                states.add(s);
064            }
065        }
066    }
067
068    public void addPinState(List<? extends PinState> states) {
069        for (PinState state : states) {
070            addPinState(state);
071        }
072    }
073    
074    public boolean hasPinState(PinState state) {
075        return states.contains(state);
076    }
077
078    public abstract void invoke(GpioPin pin, PinState state);
079}