FarshidNooshi9831068

.gitignore

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+.idea
+production
+FarshidNooshi9831068.iml

FarshidNooshi9831068/FarshidNooshi9831068.txt

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+Name: Farshid Nooshi
+Student ID: 9831068

FarshidNooshi9831068/src/lab4/Main.java

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+// In The Name Of GOD
+package lab4;
+
+import java.util.ArrayList;
+
+public class Main {
+
+    public static void main(String[] args) {
+        VotingSystem votingSystem = new VotingSystem();
+        Person[] p = new Person[]{new Person("s1", "e1"), new Person("s2", "e2"), new Person("s3", "e3"), new Person("s4", "e4")};
+        ArrayList<String>[] choices = new ArrayList[4];
+        for (int i = 0; i < 4; i++)
+            choices[i] = new ArrayList<>();
+        votingSystem.createVoting("q1", 0);
+        for (int i = 1; i <= 4; i++)
+            votingSystem.getVoting(0).createChoice("c" + i);
+        for (int i = 0; i < 4; i++)
+            choices[i].add("c" + (i + 1));
+        for (int i = 0; i < 4; i++)
+            votingSystem.vote(0, p[i], choices[i]);
+        votingSystem.printResult(0);
+        System.out.println();
+        votingSystem.createVoting("q2", 1);
+        for (int i = 1; i <= 4; i++)
+            votingSystem.getVoting(1).createChoice("c" + i);
+        for (int i = 0; i < 4; i++)
+            votingSystem.vote(1, p[i], choices[i]);
+        votingSystem.printResult(1);
+        System.out.println();
+        votingSystem.printListOfVoting();
+        System.out.println();
+        votingSystem.printVoting(0);
+        votingSystem.printVoting(1);
+        System.out.println();
+        votingSystem.printResult(0);
+        System.out.println();
+        votingSystem.printResult(1);
+        System.out.println();
+    }
+}

FarshidNooshi9831068/src/lab4/Person.java

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+// In The Name Of GOD
+package lab4;
+
+public class Person {
+    private final String firstName, lastName;
+
+    /**
+     *
+     * @param firstName is the first name of person(voter)
+     * @param lastName is the last name of person(voter)
+     */
+    public Person(String firstName, String lastName) {
+        this.firstName = firstName;
+        this.lastName = lastName;
+    }
+
+    public String getLastName() {
+        return lastName;
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+    @Override
+    public String toString() {
+        return firstName + " " + lastName;
+    }
+
+    /**
+     *  checks if two objects of person type are equal
+     * @param obj is the object to check
+     * @return true if they're equal
+     */
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == this)
+            return true;
+        if (obj == null || obj.getClass() != getClass())
+            return false;
+        Person tmp = (Person) obj;
+        return tmp.getLastName().equals(lastName) &&
+                tmp.getFirstName().equals(firstName);
+    }
+}

FarshidNooshi9831068/src/lab4/Vote.java

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+// In The Name Of GOD
+package lab4;
+
+import java.util.Objects;
+
+public class Vote {
+    private final Person person;
+    private final String date;
+
+
+    /**
+     * @param person is the person who votes
+     * @param date   is the date of the vote
+     */
+    public Vote(Person person, String date) {
+        this.person = person;
+        this.date = date;
+    }
+
+    public Person getPerson() {
+        return person;
+    }
+
+    public String getDate() {
+        return date;
+    }
+
+    /**
+     * almost copied this part from here :
+     * https://www.sitepoint.com/how-to-implement-javas-hashcode-correctly/
+     *
+     * @return an integer representing the hash value of this vote
+     */
+    @Override
+    public int hashCode() {
+        return Objects.hash(person, date);
+    }
+
+    /**
+     * checks if two objects are equal
+     * @param obj is the object to be checked
+     * @return true if the objects are equal
+     */
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == this)
+            return true;
+        if (obj == null || obj.getClass() != getClass())
+            return false;
+        Vote tmp = (Vote) obj;
+        return tmp.date.equals(date) &&
+                tmp.person.equals(person);
+    }
+
+    @Override
+    public String toString() {
+        return person.toString() + " " + date;
+    }
+}

FarshidNooshi9831068/src/lab4/Voting.java

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+// In The Name Of GOD
+package lab4;
+
+import ir.huri.jcal.JalaliCalendar;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+
+public class Voting {
+    private final int type;
+    private final String question;
+    private ArrayList<Person> voters;
+    private HashMap<String, HashSet<Vote>> choices;
+
+    /**
+     *
+     * @param type is the type of the voting
+     * @param question is the question of the voting
+     */
+    public Voting(int type, String question) {
+        this.type = type;
+        this.question = question;
+        voters = new ArrayList<>();
+        choices = new HashMap<>();
+    }
+
+    public String getQuestion() {
+        return question;
+    }
+
+    /**
+     * @param person is a person to get checked
+     * @return true if voters arrayList doesn't contain this voter
+     */
+    private boolean valid(Person person) {
+        for (Person it : voters)
+            if (person.equals(it))
+                return false;
+        return true;
+    }
+
+    /**
+     * this method votes for someone
+     *
+     * @param person  is the person who wanna attend the voting
+     * @param choices is the persons choices
+     */
+    public void vote(Person person, ArrayList<String> choices) {
+        if (choices.size() > 1 && type == 1) {
+            System.out.println("You should choose one choice in this voting");
+            return;
+        }
+
+        if (!valid(person)) {
+            System.out.println("person already voted!");
+            return;
+        }
+
+        voters.add(person);
+        JalaliCalendar date = new JalaliCalendar();
+        for (String it : choices)
+            this.choices.get(it).add(new Vote(person, date.toString()));
+    }
+
+    /**
+     * this method is a getter for voters
+     *
+     * @return the voters ArrayList
+     */
+    public ArrayList<Person> getVoters() {
+        return voters;
+    }
+
+    /**
+     * this method prints a single voting in the program by telling the voters of each option & number of votes for each choice
+     */
+    public void printVotes() {
+        System.out.println("Printing the votes");
+        {
+            System.out.println(voters.size() + " is the number of voters");
+            for (String it : choices.keySet()) {
+                System.out.println("choice " + it + " has : " + choices.get(it).size() + " votes");
+                System.out.println("Voters are : ");
+                for (Vote vote : choices.get(it)) {
+                    System.out.print(vote + " ");
+                }
+                System.out.println();
+            }
+        }
+    }
+
+    public HashMap<String, HashSet<Vote>> getChoices() {
+        return choices;
+    }
+
+    /**
+     * this method adds a new choice
+     *
+     * @param option is a new choice to add
+     */
+    public void createChoice(String option) {
+        if (choices.containsKey(option))
+            System.out.println("choice already exists!");
+        else
+            choices.put(option, new HashSet<>());
+    }
+}

FarshidNooshi9831068/src/lab4/VotingSystem.java

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+// In The Name Of GOD
+package lab4;
+
+import java.util.ArrayList;
+
+public class VotingSystem {
+    private ArrayList<Voting> votingList;
+
+    /**
+     * a simple constructor for this class
+     */
+    public VotingSystem() {
+        votingList = new ArrayList<>();
+    }
+
+    /**
+     * this class creates a new voting
+     *
+     * @param question := question of the problem
+     * @param type     := type of the question, 0 -> single choice, 1 -> multiple choice
+     */
+    public void createVoting(String question, int type) {
+        votingList.add(new Voting(type, question));
+    }
+
+    /**
+     * prints all of the voting with their number and questions
+     */
+    public void printListOfVoting() {
+        int idx = 1;
+        for (Voting voting : votingList)
+            System.out.println("" + idx++ + ") " + voting.getQuestion());
+    }
+
+    /**
+     * prints the results of a voting
+     *
+     * @param idx is an index for the voting
+     */
+    public void printResult(int idx) {
+        votingList.get(idx).printVotes();
+    }
+
+    /**
+     * prints the specific voting with their choices
+     *
+     * @param idx is the index of the voting
+     */
+    public void printVoting(int idx) {
+        System.out.println("" + (idx + 1) + ") " + votingList.get(idx).getQuestion());
+        for (String it : votingList.get(idx).getChoices().keySet())
+            System.out.println(it);
+        System.out.println();
+    }
+
+    /**
+     * @return votingList of the system
+     */
+    public ArrayList<Voting> getVotingList() {
+        return votingList;
+    }
+
+    /**
+     * @param idx is the index of the voting to be returned
+     * @return the voting[idx] from the ArrayList
+     */
+    public Voting getVoting(int idx) {
+        return votingList.get(idx);
+    }
+
+    /**
+     * generates a vote for person
+     * @param idx is index of a voting
+     * @param person is a voter
+     * @param choices is the voters choices
+     */
+    public void vote(int idx, Person person, ArrayList<String> choices) {
+        votingList.get(idx).vote(person, choices);
+    }
+}