Week 6 Assignment

src/main/java/com/github/curriculeon/Classroom.java

@@ -0,0 +1,36 @@
+package com.github.curriculeon;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class Classroom {
+    private final static Classroom instance = new Classroom();
+    private Students students = Students.getINSTANCE();
+    private  Instructors instructors = Instructors.getINSTANCE();
+
+    public static Classroom getClassroom(){
+        return instance;
+    }
+
+    public void hostLecture(Teacher teacher, Double numbersOfHours){
+        teacher.lecture(students.toArray(), numbersOfHours);
+
+    }
+
+
+    public void hostLecture(Long id, Double numberOfHours){
+        Person person = instructors.findById(id);
+        Instructor instructor = (Instructor)person;
+        instructor.lecture(students.toArray(), numberOfHours);
+    }
+
+    public Map<Student, Double> getStudyMap(){
+        Map<Student, Double> result = new HashMap<>();
+        for (Person studentAsperson : students.toArray()) {
+            Student student = (Student)studentAsperson;
+            Double studyTime = student.getTotalStudyTime();
+        }
+        return result;
+    }
+
+}

src/main/java/com/github/curriculeon/Educator.java

@@ -0,0 +1,30 @@
+package com.github.curriculeon;
+
+public enum Educator implements Teacher {
+
+    LEON,
+    HASEEB;
+
+    private Double timeWorked;
+    private final Instructor instructor;
+
+    Educator(){
+        long id = this.ordinal();
+        String name = this.name();// get instructors name.
+        this.instructor = new Instructor(id, name);
+        Instructors.getINSTANCE().add(instructor);
+    }
+
+    ;
+    @Override
+    public void teach(Learner learner, Double numberOfHours) {
+        instructor.teach(learner, numberOfHours);
+        timeWorked += numberOfHours;
+    }
+
+    @Override
+    public void lecture(Learner[] learners, Double numberOfHours) {
+        instructor.lecture(learners, numberOfHours);
+        timeWorked += numberOfHours;
+    }
+}

src/main/java/com/github/curriculeon/Instructor.java

@@ -0,0 +1,22 @@
+package com.github.curriculeon;
+
+public class Instructor extends Person implements Teacher {
+
+    public Instructor(Long id, String name) {
+        super(id, name);
+    }
+
+    @Override
+    public void teach(Learner learner, Double numberOfHours) {
+        learner.learn(numberOfHours);
+    }
+
+    @Override
+    public void lecture(Learner[] learners, Double numberOfHours) {
+        double numberOfHoursPerLearner = numberOfHours / learners.length;
+        for (int i = 0; i <  learners.length; i++) {
+            Learner learner = learners[i];
+            learner.learn(numberOfHoursPerLearner);
+        }
+    }
+}

src/main/java/com/github/curriculeon/Instructors.java

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+package com.github.curriculeon;
+
+
+import java.util.List;
+
+public class Instructors extends People<Instructor> {
+    private static final Instructors INSTANCE = new Instructors();
+
+
+    public Instructors(){
+        this.add( new Instructor(0l, "Leon"));
+        this.add(new Instructor (1l,"Christel"));
+
+    }
+
+    @Override
+    public Instructor[] toArray() {
+        int arrCount = count();
+        Instructor[] destinationArr = new Instructor[arrCount];
+        List<Instructor> instructorList = personList;
+        return instructorList.toArray(destinationArr);
+    }
+
+
+    public static Instructors getINSTANCE(){
+        return INSTANCE;
+    }
+}

src/main/java/com/github/curriculeon/Learner.java

@@ -0,0 +1,7 @@
+package com.github.curriculeon;
+
+public interface Learner {
+
+    void learn(Double numberOfHours);
+    double getTotalStudyTime();
+}

src/main/java/com/github/curriculeon/People.java

@@ -0,0 +1,66 @@
+package com.github.curriculeon;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.List;
+
+abstract class People<somePeople extends Person> implements Iterable{
+    List<somePeople> personList;
+    public People(){
+        new ArrayList<>();
+    }
+
+    public People(List<somePeople> personList){
+        this.personList = personList;
+    }
+    public  void add(somePeople personToAdd){
+        personList.add(personToAdd);
+    }
+
+    public  somePeople findById(Long id) {
+        for (int i = 0; i < personList.size() ; i++) {
+            somePeople person = personList.get(i);
+            if (person.getId() == id){// check if the person exist.
+                return person;
+            }else {
+                continue; // keep looking until id is found
+            }
+        }// for
+        return null;
+    }// findById
+
+
+    public boolean contains(somePeople person){
+        return personList.contains(person); //returns true if the object passed contains person.
+    }
+
+    public void remove(somePeople person) {
+        personList.remove(person);
+    }
+
+    public  void remove(Long id) {
+        for (somePeople person : personList) {
+            if (person.getId() == id) {
+                personList.remove(id);
+            }
+        }
+
+    }
+
+    public void removeAll(){
+        personList.clear();
+    }
+
+
+    public  Integer count(){
+        return personList.size();
+    }
+
+    abstract public somePeople[] toArray();
+
+    @Override
+    public Iterator<somePeople> iterator(){
+        return personList.iterator();
+    }
+}//class

src/main/java/com/github/curriculeon/Person.java

@@ -1,5 +1,31 @@
 package com.github.curriculeon;
 
+/*
+ * Created By Emmanuel Orubele
+ *  on 7/21/2020
+ */
+
 public class Person {
+    private final Long id;
+    private String name;
+
+public Person() {
+    this.id = getId();
+}
+    public Person(Long id, String name){
+        this.id = id;
+        this.name = name;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
 
+    public void setName(String name) {
+        this.name = name;
+    }
 }

src/main/java/com/github/curriculeon/Student.java

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+package com.github.curriculeon;
+
+public class Student extends Person implements Learner{
+
+    private double totalStudyTime;
+    public Student(Long id, String name) {
+        super(id, name);
+    }
+
+    @Override
+    public void learn(Double numberOfHours) {
+        totalStudyTime += numberOfHours;
+
+    }
+
+    @Override
+    public double getTotalStudyTime() {
+        return totalStudyTime;
+    }
+}

src/main/java/com/github/curriculeon/Students.java

@@ -0,0 +1,29 @@
+package com.github.curriculeon;
+
+import java.util.List;
+
+public class Students extends People<Student> {
+    private static final Students INSTANCE = new Students();
+    //private Map<Integer, String> mates = new HashMap<Integer, String>();
+    // tried to use a hash map.
+
+    private Students(){
+        this.add(new Student(10l, "Christopher"));
+        this.add( new Student(15l, "David"));
+
+
+    }
+
+    @Override
+    public Student[] toArray() {
+        int arraySize = count();
+        Student[] destinationArr = new Student[arraySize];
+        List<Student> sourceList = personList;
+        return sourceList.toArray(destinationArr);
+
+    }
+
+    public static Students getINSTANCE(){
+        return INSTANCE;
+    }
+}

src/main/java/com/github/curriculeon/Teacher.java

@@ -0,0 +1,7 @@
+package com.github.curriculeon;
+
+interface Teacher {
+    void teach(Learner learner, Double numberOfHours);
+    void lecture(Learner[] learners, Double numberOfHours);
+
+}

src/test/java/com/github/curriculeon/TestClassroom.java

@@ -0,0 +1,41 @@
+package com.github.curriculeon;
+
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.util.Map;
+import java.util.Set;
+
+public class TestClassroom {
+
+
+    @Test
+    public void testHostLecture(){
+        //Given
+        Classroom classroom = Classroom.getClassroom();
+        Teacher teacher = Instructors.getINSTANCE().findById(2l);
+        Integer numberOfStudents = Students.getINSTANCE().count();
+        Double numberOfHoursToLecture = numberOfStudents.doubleValue();
+        Double expectedNumberOfHours = numberOfHoursToLecture / numberOfStudents;
+        Map<Student, Double> preStudyMap = classroom.getStudyMap();
+
+        //When
+        classroom.hostLecture(teacher, numberOfHoursToLecture);
+        Map<Student, Double> postStudyMap = classroom.getStudyMap();
+        Set<Student> keySet = postStudyMap.keySet();
+        for (Student student : keySet) {
+            Double preStudyTime = preStudyMap.get(student);
+            Double expectedStudyTime = preStudyTime + expectedNumberOfHours;
+            Double actualStudyTime = postStudyMap.get(student);
+
+
+
+            //Then
+            Assert.assertEquals(expectedStudyTime, actualStudyTime);
+
+        }
+
+
+    }
+}