com.ibm.iot.auto.bluemix.samples.ui.InputData.java Source code

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Here is the source code for com.ibm.iot.auto.bluemix.samples.ui.InputData.java

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/**
 * Copyright 2016 IBM Corp. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the gLicenseh);
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *  https://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 gAS ISh 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 com.ibm.iot.auto.bluemix.samples.ui;

import java.io.FileReader;
import java.io.IOException;
import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Date;
import java.util.List;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.json.JSONTokener;

public class InputData {

    private String inputFile;

    public InputData(String inputFile) {
        this.inputFile = inputFile;
    }

    public class CarProbe implements Comparable<CarProbe> {
        public String tripId;
        public String timestamp;
        public double heading;
        public double speed;
        public double longitude;
        public double latitude;

        public CarProbe(String tripId, String timestamp, double heading, double speed, double longitude,
                double latitude) {
            this.tripId = tripId;
            this.timestamp = timestamp;
            this.longitude = longitude;
            this.latitude = latitude;
            this.heading = heading;
            this.speed = speed;
        }

        @Override
        public int compareTo(CarProbe that) {
            SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
            Date thatDate = format.parse(that.timestamp, new ParsePosition(0));
            long thatDateLong = thatDate.getTime();
            Date thisDate = format.parse(this.timestamp, new ParsePosition(0));
            long thisDateLong = thisDate.getTime();
            Long diff = new Long(thisDateLong - thatDateLong);
            return new Integer(diff.toString());
        }

        @Override
        public String toString() {
            return "tripId: " + tripId + ", " + "timepstamp: " + timestamp + ", " + "longitutude: " + longitude
                    + ", " + "latitude: " + latitude + ", " + "heading: " + heading + ", " + "speend: " + speed
                    + ", ";
        }
    }

    public List<CarProbe> getCarProbes() throws IOException, JSONException {
        List<CarProbe> carProbes = new ArrayList<CarProbe>();

        FileReader fileReader = null;
        try {
            fileReader = new FileReader(inputFile);
            JSONTokener jsonTokener = new JSONTokener(fileReader);
            JSONArray cars = new JSONArray(jsonTokener);
            for (int i = 0; i < cars.length(); i++) {
                JSONObject car = cars.getJSONObject(i);
                CarProbe carProbe = new CarProbe(car.getString("trip_id"), car.getString("timestamp"),
                        car.getDouble("heading"), car.getDouble("speed"), car.getDouble("longitude"),
                        car.getDouble("latitude"));
                carProbes.add(carProbe);
            }
        } finally {
            if (fileReader != null) {
                fileReader.close();
            }
        }
        Collections.sort(carProbes);

        return carProbes;
    }

}