Finished lab

.gitignore

@@ -1,5 +1,23 @@
 /target/
 .DS_Store
 .classpath
-#.project
+.project
 .settings
+
+
+# User-specific stuff:
+*.iml
+.idea/**
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+.idea/dictionaries
+
+# Sensitive or high-churn files:
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.xml
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+

pom.xml

@@ -12,6 +12,8 @@
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    <maven.compiler.source>1.8</maven.compiler.source>
+    <maven.compiler.target>1.8</maven.compiler.target>
   </properties>
 
   <dependencies>
@@ -22,4 +24,6 @@
       <scope>test</scope>
     </dependency>
   </dependencies>
+
+
 </project>

src/main/java/interfaces/Learner.java

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

src/main/java/interfaces/Teacher.java

@@ -0,0 +1,8 @@
+package interfaces;
+
+public interface Teacher {
+
+    void teach (Learner learner, double numberOfHours);
+    void lecture (Learner[] learners, double numberOfHours);
+
+}

src/main/java/io/zipcoder/interfaces/Educator.java

@@ -0,0 +1,35 @@
+package io.zipcoder.interfaces;
+
+import interfaces.Learner;
+import interfaces.Teacher;
+
+public enum Educator implements Teacher {
+
+    DOLIO (new Instructor(20L,"Wil"),0.0),
+    ROBERTO (new Instructor(22L,"Jack"),0.0);
+
+    private final Instructor instructor;
+    private double timeWorked;
+
+
+    Educator(Instructor instructor, double timeWorked) {
+        this.instructor = instructor;
+        this.timeWorked = timeWorked;
+    }
+
+    public double getTimeWorked() {
+        return this.timeWorked;
+    }
+
+    @Override
+    public void teach(Learner learner, double numberOfHours) {
+        this.instructor.teach(learner,numberOfHours);
+        this.timeWorked += numberOfHours;
+    }
+
+    @Override
+    public void lecture(Learner[] learners, double numberOfHours) {
+        this.instructor.lecture(learners,numberOfHours);
+        this.timeWorked += numberOfHours;
+    }
+}

src/main/java/io/zipcoder/interfaces/Instructor.java

@@ -0,0 +1,28 @@
+package io.zipcoder.interfaces;
+
+import interfaces.Learner;
+import interfaces.Teacher;
+
+public class Instructor extends Person implements Teacher {
+
+
+//-----------  constructor  ---------------------------
+    public Instructor(Long id, String name) {
+        super(id, name);
+    }
+
+
+//-----------  interfaces  ---------------------------
+
+    public void teach(Learner learner, double numberOfHours) {
+        learner.learn(numberOfHours);
+    }
+
+    public void lecture(Learner[] learners, double numberOfHours) {
+        double numberOfHoursPerLearner = numberOfHours / learners.length;
+
+        for(Learner eachLearner : learners){
+            eachLearner.learn(numberOfHoursPerLearner);
+        }
+    }
+}

src/main/java/io/zipcoder/interfaces/Instructors.java

@@ -0,0 +1,28 @@
+package io.zipcoder.interfaces;
+
+
+public final class Instructors extends People<Instructor> {
+
+    private static final Instructors INSTANCE;// = new Instructors();
+
+
+    public static Instructors getInstance(){
+        return INSTANCE;
+    }
+
+    public Instructor[] toArray() {
+        Instructor[] instructorsArray = new Instructor[this.INSTANCE.count()];
+        int i = 0;
+        for (Instructor eachInstructor : this.INSTANCE){
+            instructorsArray[i++] = eachInstructor;
+        }
+        return instructorsArray;
+    }
+
+    // the below is how you instantiate it
+    static {
+        INSTANCE = new Instructors();
+        INSTANCE.add(new Instructor(30L,"Dolio"));
+        INSTANCE.add(new Instructor(31L,"Roberto"));
+    }
+}

src/main/java/io/zipcoder/interfaces/People.java

@@ -0,0 +1,54 @@
+package io.zipcoder.interfaces;
+
+import javax.swing.*;
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+public abstract class People <E extends Person> implements Iterable<E>{
+
+    List<E> personList = new ArrayList<>();
+    E[] personArray;
+
+
+    public void add (E person){
+        this.personList.add(person);
+    }
+
+    public E findById(Long id){
+
+        for (E eachPerson : this.personList){
+            if (eachPerson.getId() == id) return eachPerson;
+        }
+        return null;
+    }
+
+    public Boolean contains(E person){
+        return this.personList.contains(person);
+    }
+
+    public void remove(E person){
+        if (contains(person)){
+            this.personList.remove(person);
+        }
+    }
+
+    public void remove(Long id){
+        this.personList.remove(findById(id));
+    }
+
+    public void removeAll(){
+        this.personList.clear();
+    }
+
+    public Integer count(){
+        return this.personList.size();
+    }
+
+    public abstract E[] toArray();
+
+    public Iterator<E> iterator() {
+        return this.personList.iterator();
+    }
+
+}

src/main/java/io/zipcoder/interfaces/Person.java

@@ -2,4 +2,24 @@
 
 public class Person {
 
+    private final Long id;
+    private String name;
+
+    public Person(Long id, String name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    public Long getId (){
+        return this.id;
+    }
+
+    public String getName(){
+        return this.name;
+    }
+
+    public void setName(String name){
+        this.name = name;
+    }
 }
+

src/main/java/io/zipcoder/interfaces/Student.java

@@ -0,0 +1,27 @@
+package io.zipcoder.interfaces;
+
+import interfaces.Learner;
+
+public class Student extends Person implements Learner {
+
+    double totalStudyTime;
+
+//-----------  constructor --------------------
+    public Student(Long id, String name) {
+        super(id, name);
+    }
+
+//--------------------------------------------
+
+
+
+//----------  interfaces -----------------------
+    public void learn(double numberOfHours) {
+        this.totalStudyTime += numberOfHours;
+    }
+
+
+    public Double getTotalStudyTime() {
+        return this.totalStudyTime;
+    }
+}

src/main/java/io/zipcoder/interfaces/Students.java

@@ -0,0 +1,29 @@
+package io.zipcoder.interfaces;
+
+
+public final class Students extends People<Student> {
+
+    private static final Students INSTANCE;// = new Students();
+
+    public static Students getInstance(){
+        return INSTANCE;
+    }
+
+
+    public Student[] toArray() {
+        Student[] studentArray = new Student[this.INSTANCE.count()];
+        int i = 0;
+        for (Student eachStudent : this.INSTANCE){
+            studentArray[i++] = eachStudent;
+        }
+        return studentArray;
+    }
+
+    // the below is how you instantiate it
+    static {
+        INSTANCE = new Students();
+        INSTANCE.add(new Student(30L,"John"));
+        INSTANCE.add(new Student(31L, "V"));
+        INSTANCE.add(new Student(32L,"X"));
+    }
+}

src/main/java/io/zipcoder/interfaces/ZipCodeWilmington.java

@@ -0,0 +1,37 @@
+package io.zipcoder.interfaces;
+import interfaces.Teacher;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public final class ZipCodeWilmington {
+
+    private static final ZipCodeWilmington INSTANCE = new ZipCodeWilmington();
+
+    private static Students students = Students.getInstance();
+    private static Instructors instructors = Instructors.getInstance();
+    private static Map<Student, Double> studyMap;
+
+
+    public static ZipCodeWilmington getInstance(){
+        return INSTANCE;
+    }
+
+
+    // static so it can be accessed directly
+    public static void hostLecture(Teacher teacher, double numberOfHours){
+        teacher.lecture(students.toArray(),numberOfHours);
+    }
+
+    public static void hostLecture(long id, double numberOfHours){
+        instructors.findById(id).lecture(students.toArray(),numberOfHours);
+    }
+
+    public static Map<Student,Double> getStudyMap(){
+        studyMap = new HashMap<Student, Double>();
+        for (Student eachStudent : students){
+            studyMap.put(eachStudent,eachStudent.getTotalStudyTime());
+        }
+        return studyMap;
+    }
+}

src/test/java/io/zipcoder/interfaces/EducatorTest.java

@@ -0,0 +1,55 @@
+package io.zipcoder.interfaces;
+
+import interfaces.Teacher;
+import org.junit.Assert;
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+public class EducatorTest {
+
+    @Test
+    public void testImplementation(){
+        Assert.assertTrue(Educator.DOLIO instanceof Teacher);
+    }
+
+    @Test
+    public void getTimeWorked() {
+        Student student1 = new Student(20L,"Joe");
+        Student student2 = new Student(22L,"Jack");
+        Student[] students = {student1,student2};
+
+        Educator.DOLIO.lecture(students,20);
+        Double expected = 20.0;
+        Double actual = Educator.DOLIO.getTimeWorked();
+
+        Assert.assertEquals(expected,actual,0.0);
+    }
+
+    @Test
+    public void teach() {
+        //each student
+        Student student1 = new Student(20L,"Joe");
+        Educator.ROBERTO.teach(student1,10);
+
+        double expected = 10.0;
+        double actual = student1.getTotalStudyTime();
+
+        Assert.assertEquals(expected,actual,0.0);
+    }
+
+    @Test
+    public void lecture() {
+        // divide per nr of students
+        Student student1 = new Student(20L,"Joe");
+        Student student2 = new Student(21L,"Jack");
+        Student[] students = {student1,student2};
+
+        Educator.ROBERTO.lecture(students,90);
+
+        double expected = 45;
+        double actual = student1.getTotalStudyTime();
+
+        Assert.assertEquals(expected,actual,0.0);
+    }
+}