/*
* #!
* %
* Copyright (C) 2014 - 2016 Humboldt-Universität zu Berlin
* %
* 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 de.hub.cs.dbis.lrb.types.internal;
import backtype.storm.tuple.Fields;
import backtype.storm.tuple.Values;
import de.hub.cs.dbis.lrb.queries.utils.TopologyControl;
import de.hub.cs.dbis.lrb.types.util.IPositionIdentifier;
import de.hub.cs.dbis.lrb.util.Constants;
import de.hub.cs.dbis.lrb.util.Time;
/**
* {@link StoppedCarTuple} represents an intermediate result tuple; it reports a stopped car for a specific time, xway,
* lane, position, and direction. If VID is negative, it reports the first car movement for a stopped car.<br />
* <br />
* It has the following attributes: VID, MINUTE, XWAY, LANE, POSITON, DIR
* <ul>
* <li>VID: the vehicle id</li>
* <li>TIME: the time when the vehicle stopped</li>
* <li>XWAY: the expressway in which the vehicle stopped</li>
* <li>LANE: the lane in which the vehicle stopped</li>
* <li>POSITON: the position in which the vehicle stopped</li>
* <li>DIR: the driving direction of the stopped vehicle</li>
* </ul>
*
* @author mjsax
*/
public final class StoppedCarTuple extends Values implements IPositionIdentifier {
private static final long serialVersionUID = -7555340520758056252L;
// attribute indexes
/** The index of the VID attribute. */
public final static int VID_IDX = 0;
/** The index of the TIME attribute. */
public final static int TIME_IDX = 1;
/** The index of the XWAY attribute. */
public final static int XWAY_IDX = 2;
/** The index of the LANE attribute. */
public final static int LANE_IDX = 3;
/** The index of the POSITION attribute. */
public final static int POS_IDX = 4;
/** The index of the DIR attribute. */
public final static int DIR_IDX = 5;
public StoppedCarTuple() {}
/**
* Instantiates a new {@link StoppedCarTuple} for the given attributes.
*
* @param vid
* the id of the stopped vehicle
* @param time
* the time when the car stopped
* @param xway
* the expressway the vehicle is on
* @param lane
* the lane the vehicle is in
* @param position
* the position of the vehicle
* @param direction
* the vehicle's driving direction
*/
public StoppedCarTuple(Integer vid, Short time, Integer xway, Short lane, Integer position, Short direction) {
assert (vid != null);
assert (time != null);
assert (xway != null);
assert (lane != null);
assert (position != null);
assert (direction != null);
super.add(VID_IDX, vid);
super.add(TIME_IDX, time);
super.add(XWAY_IDX, xway);
super.add(LANE_IDX, lane);
super.add(POS_IDX, position);
super.add(DIR_IDX, direction);
assert (super.size() == 6);
}
/**
* Returns the the vehicle ID of this {@link StoppedCarTuple}.
*
* @return the VID of this tuple
*/
public final Integer getVid() {
return (Integer)super.get(VID_IDX);
}
/**
* Returns the time of this {@link StoppedCarTuple}.
*
* @return the time of this tuple
*/
public final Short getTime() {
return (Short)super.get(TIME_IDX);
}
/**
* Returns the expressway ID of this {@link StoppedCarTuple}.
*
* @return the expressway of this tuple
*/
@Override
public final Integer getXWay() {
return (Integer)super.get(XWAY_IDX);
}
/**
* Returns the lane of this {@link StoppedCarTuple}.
*
* @return the lane of this tuple
*/
@Override
public final Short getLane() {
return (Short)super.get(LANE_IDX);
}
/**
* Returns the position of this {@link StoppedCarTuple}.
*
* @return the position of this tuple
*/
@Override
public final Integer getPosition() {
return (Integer)super.get(POS_IDX);
}
/**
* Returns the segment of this {@link StoppedCarTuple}.
*
* @return the segment of this tuple
*/
public final Short getSegment() {
return new Short(
(short)(((Integer)super.get(POS_IDX)).intValue() / (Constants.NUMBER_OF_POSITIONS / Constants.NUMBER_OF_SEGMENT)));
}
/**
* Returns the vehicle's direction of this {@link StoppedCarTuple}.
*
* @return the direction of this tuple
*/
@Override
public final Short getDirection() {
return (Short)super.get(DIR_IDX);
}
/**
* Returns the 'minute number' of this {@link StoppedCarTuple}.
*
* @return the 'minute number' of this {@link StoppedCarTuple}
*/
public final short getMinuteNumber() {
return Time.getMinute(this.getTime().shortValue());
}
/**
* Returns the schema of a {@link StoppedCarTuple}.
*
* @return the schema of a {@link StoppedCarTuple}
*/
public static Fields getSchema() {
return new Fields(TopologyControl.VEHICLE_ID_FIELD_NAME, TopologyControl.TIMESTAMP_FIELD_NAME,
TopologyControl.XWAY_FIELD_NAME, TopologyControl.LANE_FIELD_NAME, TopologyControl.POSITION_FIELD_NAME,
TopologyControl.DIRECTION_FIELD_NAME);
}
}