com.mycompany.app.Section.java Source code

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Here is the source code for com.mycompany.app.Section.java

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package com.mycompany.app;

import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import org.apache.commons.math3.distribution.NormalDistribution;

public class Section implements Playable {
    private static NormalDistribution normalDistribution = new NormalDistribution(-2, 2.5);
    private static double heatGeneratedByPerson = 9;
    private static double doorHeight = 10;
    private static double doorWidth = 8;
    private static double dischargeCoefficent = 0.6;
    private static double gravity = 32.2;

    int students;
    int studentsInClass;
    Building location;
    Calendar startTime;
    Calendar endTime;
    double generatedHeat;

    public Section(int Students, Building location, Calendar startTime, Calendar endTime) {
        studentsInClass = 0;
        this.students = Students;
        this.location = location;
        this.startTime = startTime;
        this.endTime = endTime;
    }

    public Section() {
        studentsInClass = 0;
        students = 0;
        location = null;
        startTime = endTime = new GregorianCalendar();
    }

    public String ToString() {
        return location.number + ", " + students + ", " + startTime.getTime().toString() + ", "
                + endTime.getTime().toString();
    }

    @Override
    public void init() throws Exception {

    }

    @Override
    public void nextStep() throws Exception {
        double heat = 0;
        heat += getHeatGeneratedInClass();
        heat += getHeatGeneratedFromDoor();
        generatedHeat = heat;
    }

    public void studentsEnterClass() {
        double density = normalDistribution.density(
                minutesDiff(new Date(startTime.getTimeInMillis()), new Date(Campus.time.getTimeInMillis())));
        studentsInClass += (int) Math.round(density * (double) students);
    }

    public void studentsExitClass(int number) {
        double density = normalDistribution
                .density(minutesDiff(new Date(Campus.time.getTimeInMillis()), new Date(endTime.getTimeInMillis())));
        studentsInClass -= (int) Math.round(density * (double) students);
    }

    public double getHeatGeneratedInClass() {
        return (double) studentsInClass * heatGeneratedByPerson;
    }

    public double getHeatGeneratedFromDoor() {
        int studentEnter = (int) Math.round(normalDistribution
                .density(minutesDiff(new Date(Campus.time.getTimeInMillis()), new Date(endTime.getTimeInMillis())))
                * (double) students);
        int studentExit = (int) Math.round(normalDistribution
                .density(minutesDiff(new Date(Campus.time.getTimeInMillis()), new Date(endTime.getTimeInMillis())))
                * (double) students);
        //Take the sum of the times and passe it to heatbyTime
        return heatbyTime(studentEnter + studentExit);
    }

    public int doorOpen() {
        return 0;
    }

    private int minutesDiff(Date earlierDate, Date laterDate) {
        if (earlierDate == null || laterDate == null)
            return 0;

        return (int) ((laterDate.getTime() / 60000) - (earlierDate.getTime() / 60000));
    }

    private double heatbyTime(int seconds) {
        double inTemp = FtoK(location.currentTemperature);
        double exTemp = FtoK(location.weather.currentTemp);
        double airEscaping = (1 / 3) * (doorHeight * doorWidth * dischargeCoefficent)
                * Math.sqrt(gravity * doorHeight * (exTemp - inTemp) / +inTemp);
        double btuPerSec = airEscaping * 1.08 * (exTemp - inTemp);
        return btuPerSec * seconds;
    }

    public double FtoK(double F) {
        return (F - 32) / 1.8 + 273.15;
    }
}