package com.pi4j.io.gpio.impl;
/*
* #%L
* **********************************************************************
* ORGANIZATION : Pi4J
* PROJECT : Pi4J :: Java Library (Core)
* FILENAME : GpioEventMonitorImpl.java
*
* This file is part of the Pi4J project. More information about
* this project can be found here: http://www.pi4j.com/
* **********************************************************************
* %%
* Copyright (C) 2012 - 2014 Pi4J
* %%
* Licensed under the Apache License, Version 2.0 (the "License"); you
* may not use this file except in compliance with the License. You may obtain a copy of the License
* at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License
* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing permissions and limitations under
* the License.
* #L%
*/
import com.pi4j.io.gpio.GpioPinInput;
import com.pi4j.io.gpio.PinState;
import com.pi4j.io.gpio.event.GpioPinListener;
import com.pi4j.io.gpio.event.GpioPinAnalogValueChangeEvent;
import com.pi4j.io.gpio.event.GpioPinDigitalStateChangeEvent;
import com.pi4j.io.gpio.event.GpioPinListenerAnalog;
import com.pi4j.io.gpio.event.GpioPinListenerDigital;
import com.pi4j.io.gpio.event.PinAnalogValueChangeEvent;
import com.pi4j.io.gpio.event.PinEvent;
import com.pi4j.io.gpio.event.PinEventType;
import com.pi4j.io.gpio.event.PinDigitalStateChangeEvent;
import com.pi4j.io.gpio.event.PinListener;
import com.pi4j.io.gpio.trigger.GpioTrigger;
@SuppressWarnings("unused")
public class GpioEventMonitorImpl implements PinListener {
private final GpioPinInput pin;
public GpioEventMonitorImpl(GpioPinInput pin) {
this.pin = pin;
}
@Override
public void handlePinEvent(PinEvent event) {
// only process listeners and triggers if the received interrupt event
// matches the pin number being tracked my this class instance
if (this.pin.getPin().equals(event.getPin())) {
if (event.getEventType() == PinEventType.DIGITAL_STATE_CHANGE) {
PinState state = ((PinDigitalStateChangeEvent)event).getState();
// process event callbacks for digital listeners
for (GpioPinListener listener : pin.getListeners()) {
if (listener instanceof GpioPinListenerDigital) {
((GpioPinListenerDigital)listener).handleGpioPinDigitalStateChangeEvent(new GpioPinDigitalStateChangeEvent(event.getSource(), pin, state));
}
}
// process triggers
for (GpioTrigger trigger : pin.getTriggers()) {
if (trigger.hasPinState(state)) {
trigger.invoke(pin, state);
}
}
} else if(event.getEventType() == PinEventType.ANALOG_VALUE_CHANGE) {
double value = ((PinAnalogValueChangeEvent)event).getValue();
// process event callbacks for analog listeners
for (GpioPinListener listener : pin.getListeners()) {
if (listener instanceof GpioPinListenerAnalog) {
((GpioPinListenerAnalog)listener).handleGpioPinAnalogValueChangeEvent(new GpioPinAnalogValueChangeEvent(event.getSource(), pin, value));
}
}
}
}
}
}