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/*
* Copyright 2016 Anton Tananaev (anton@traccar.org)
*
* 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.
*/
package org.traccar.events;
import java.util.Collections;
import java.util.Map;
import org.traccar.BaseEventHandler;
import org.traccar.Context;
import org.traccar.model.Device;
import org.traccar.model.DeviceState;
import org.traccar.model.Event;
import org.traccar.model.Position;
public class OverspeedEventHandler extends BaseEventHandler {
public static final String ATTRIBUTE_SPEED_LIMIT = "speedLimit";
private boolean notRepeat;
private long minimalDuration;
public OverspeedEventHandler(long minimalDuration, boolean notRepeat) {
this.notRepeat = notRepeat;
this.minimalDuration = minimalDuration;
}
private Map<Event, Position> newEvent(DeviceState deviceState, double speedLimit) {
Position position = deviceState.getOverspeedPosition();
Event event = new Event(Event.TYPE_DEVICE_OVERSPEED, position.getDeviceId(), position.getId());
event.set("speed", deviceState.getOverspeedPosition().getSpeed());
event.set(ATTRIBUTE_SPEED_LIMIT, speedLimit);
deviceState.setOverspeedState(notRepeat);
deviceState.setOverspeedPosition(null);
return Collections.singletonMap(event, position);
}
public Map<Event, Position> updateOverspeedState(DeviceState deviceState, double speedLimit) {
Map<Event, Position> result = null;
if (deviceState.getOverspeedState() != null && !deviceState.getOverspeedState()
&& deviceState.getOverspeedPosition() != null && speedLimit != 0) {
long currentTime = System.currentTimeMillis();
Position overspeedPosition = deviceState.getOverspeedPosition();
long overspeedTime = overspeedPosition.getFixTime().getTime();
if (overspeedTime + minimalDuration <= currentTime) {
result = newEvent(deviceState, speedLimit);
}
}
return result;
}
public Map<Event, Position> updateOverspeedState(DeviceState deviceState, Position position, double speedLimit) {
Map<Event, Position> result = null;
Boolean oldOverspeed = deviceState.getOverspeedState();
long currentTime = position.getFixTime().getTime();
boolean newOverspeed = position.getSpeed() > speedLimit;
if (newOverspeed && !oldOverspeed) {
if (deviceState.getOverspeedPosition() == null) {
deviceState.setOverspeedPosition(position);
}
} else if (oldOverspeed && !newOverspeed) {
deviceState.setOverspeedState(false);
deviceState.setOverspeedPosition(null);
} else {
deviceState.setOverspeedPosition(null);
}
Position overspeedPosition = deviceState.getOverspeedPosition();
if (overspeedPosition != null) {
long overspeedTime = overspeedPosition.getFixTime().getTime();
if (newOverspeed && overspeedTime + minimalDuration <= currentTime) {
result = newEvent(deviceState, speedLimit);
}
}
return result;
}
@Override
protected Map<Event, Position> analyzePosition(Position position) {
long deviceId = position.getDeviceId();
Device device = Context.getIdentityManager().getById(deviceId);
if (device == null) {
return null;
}
if (!Context.getIdentityManager().isLatestPosition(position) || !position.getValid()) {
return null;
}
double speedLimit = Context.getDeviceManager().lookupAttributeDouble(deviceId, ATTRIBUTE_SPEED_LIMIT, 0, false);
if (speedLimit == 0) {
return null;
}
Map<Event, Position> result = null;
DeviceState deviceState = Context.getDeviceManager().getDeviceState(deviceId);
if (deviceState.getOverspeedState() == null) {
deviceState.setOverspeedState(position.getSpeed() > speedLimit);
} else {
result = updateOverspeedState(deviceState, position, speedLimit);
}
Context.getDeviceManager().setDeviceState(deviceId, deviceState);
return result;
}
}
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