[1차 VER1.0] Java ToyProject upload by YongwonKim

me/smartstore/Main.java

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+package me.smartstore;
+
+public class Main {
+    public static void main(String[] args) {
+        SmartStoreApp.getInstance().test().run(); // function chaining
+        // SmartStoreApp.getInstance().run();
+    }
+}

me/smartstore/SmartStoreApp.java

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+package me.smartstore;
+
+
+import me.smartstore.customer.Customer;
+import me.smartstore.customer.Customers;
+import me.smartstore.group.Group;
+import me.smartstore.group.GroupType;
+import me.smartstore.group.Groups;
+import me.smartstore.group.Parameter;
+import me.smartstore.menu.MainMenu;
+
+public class SmartStoreApp {
+    private final Groups allGroups = Groups.getInstance();
+    private final Customers allCustomers = Customers.getInstance();
+    private final MainMenu mainMenu = MainMenu.getInstance();
+    private static SmartStoreApp smartStoreApp;
+
+    public static SmartStoreApp getInstance(){
+        if(smartStoreApp == null){
+            smartStoreApp = new SmartStoreApp();
+        }
+        return smartStoreApp;
+    }
+    private SmartStoreApp(){}
+    public void details(){
+        System.out.println("\n\n===========================================");
+        System.out.println(" Title : SmartStore Customer Classification");
+        System.out.println(" Release Date : 23.04.27");
+        System.out.println(" Copyright 2023 Eunbin All rights reserved.");
+        System.out.println("===========================================\n");
+    }
+    public SmartStoreApp test(){
+
+        allGroups.add(new Group(new Parameter(10, 100000), GroupType.GENERAL));
+        allGroups.add(new Group(new Parameter(20, 200000), GroupType.VIP));
+        allGroups.add(new Group(new Parameter(30, 300000), GroupType.VVIP));
+
+
+        for (int i = 0; i < 26; i++) {
+            allCustomers.add(new Customer(
+                    Character.toString(
+                            (char) ('a' + i)),
+                    (char) ('a' + i) + "123",
+                    ((int) (Math.random() * 5) + 1) * 10,
+                    ((int) (Math.random() * 5) + 1) * 100000));
+        }
+
+        System.out.println("allCustomers = " + allCustomers);
+        System.out.println("allGroups = " + allGroups);
+
+        // @TODO: refresh do not implemented yet.
+        allCustomers.refresh();
+
+
+        return this; // smartStoreApp
+
+
+    }
+    public void run() {
+        details();
+        mainMenu.manage();
+    }
+
+}

me/smartstore/arrays/Collections.java

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+package me.smartstore.arrays;
+
+public interface Collections<T> {
+
+    int size();
+    T get(int index);
+    void set(int index, T object);
+    int indexOf(T object);
+    void add(T object);
+    void add(int index, T object);
+    T pop();
+    T pop(int index);
+    T pop(T object);
+
+
+}

me/smartstore/arrays/DArray.java

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+package me.smartstore.arrays;
+
+import me.smartstore.exception.ElementNotFoundException;
+import me.smartstore.exception.EmptyArrayException;
+import me.smartstore.exception.NullArgumentException;
+
+public class DArray<T> implements Collections<T> {
+    protected static final int DEFAULT = 10;
+
+    protected T[] arrays;
+    protected int size;
+    protected int capacity;
+
+    public DArray() throws ClassCastException {
+        arrays = (T[]) new Object[DEFAULT];
+        capacity = DEFAULT;
+    }
+
+    public DArray(int initial) throws ClassCastException {
+        arrays = (T[]) new Object[initial];
+        capacity = initial;
+    }
+
+    public DArray(T[] arrays) {
+        this.arrays = arrays;
+        capacity = arrays.length;
+        size = arrays.length;
+    }
+
+    /////////////////////////////////////////
+    // add, set, get, pop, indexOf, size, capacity (for dynamic-sized array)
+
+    @Override
+    public int size() {
+        return size;
+    }
+
+    // 배열에 얼마나 capacity 남아있는지 외부에 알려줄 필요가 없기 때문에 <protected>으로 정의
+    protected int capacity() {
+        return capacity;
+    }
+
+    @Override
+    public T get(int index) throws IndexOutOfBoundsException {
+        if (index < 0 || index >= size) throw new IndexOutOfBoundsException();
+        return arrays[index];
+    }
+
+    /**
+     * @param: ...
+     * @return: ...
+     * @throws: IndexOutOfBoundsException
+     * @throws: NullArgumentException
+     * */
+    @Override
+    public void set(int index, T object) throws IndexOutOfBoundsException, NullArgumentException {
+        if (index < 0 || index >= size) throw new IndexOutOfBoundsException();
+        if (object == null) throw new NullArgumentException();
+
+        arrays[index] = object;
+    }
+
+    @Override
+    public int indexOf(T object) throws NullArgumentException, ElementNotFoundException {
+        if (object == null) throw new NullArgumentException(); // not found (instead of throwing exception)
+
+        for (int i = 0; i < size; i++) {
+            if (arrays[i] == null) continue;
+            if (arrays[i].equals(object)) return i;
+        }
+        throw new ElementNotFoundException(); // not found
+    }
+
+    // 배열의 cap이 부족한 경우
+    @Override
+    public void add(T object) throws NullArgumentException {
+        if (object == null) throw new NullArgumentException(); // if argument is null, do not add null value in array
+
+        if (size < capacity) {
+            arrays[size] = object;
+            size++;
+        } else {
+            grow();
+            add(object);
+        }
+    }
+
+    @Override
+    public void add(int index, T object) throws IndexOutOfBoundsException, NullArgumentException {
+        if (index < 0 || index >= size) throw new IndexOutOfBoundsException();
+        if (object == null) throw new NullArgumentException();
+
+        if (size < capacity) {
+            for (int i = size-1; i >= index ; i--) {
+                arrays[i+1] = arrays[i];
+            }
+            arrays[index] = object;
+            size++;
+        } else {
+            grow();
+            add(index, object);
+        }
+    }
+
+    @Override
+    public T pop() {
+        return pop(size-1);
+    }
+
+    @Override
+    public T pop(int index) throws IndexOutOfBoundsException {
+        if (size == 0) throw new EmptyArrayException();
+        if (index < 0 || index >= size) throw new IndexOutOfBoundsException();
+
+        T popElement = arrays[index];
+        arrays[index] = null; // 삭제됨을 명시적으로 표현
+
+        for (int i = index+1; i < size; i++) {
+            arrays[i-1] = arrays[i];
+        }
+        arrays[size-1] = null;
+        size--;
+        return popElement;
+    }
+
+    @Override
+    public T pop(T object) {
+        return pop(indexOf(object));
+    }
+
+    protected void grow() {
+        capacity *= 2; // doubling
+        arrays = java.util.Arrays.copyOf(arrays, capacity);
+
+        // size는 그대로
+    }
+
+    @Override
+    public String toString() {
+        String toStr = "";
+        for (int i = 0; i < size; i++) {
+            toStr += (arrays[i] + "\n");
+        }
+        return toStr;
+    }
+}
+

me/smartstore/customer/Customer.java

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+package me.smartstore.customer;
+
+import me.smartstore.group.Group;
+
+import java.util.Objects;
+
+public class Customer implements Comparable<Customer> {
+    private String cName;
+    private String cId;
+    private Integer totalTime;
+    private Integer totalPay;
+    private Group group;
+    //refresh 함수가 호출되는 경우 -> 분류기준이 바뀔때, 새로운 고객이 들어올때
+
+    public Customer(){
+
+    }
+    public Customer(String cName, String cId) {
+        this.cName = cName;
+        this.cId = cId;
+    }
+
+    public Customer(String cName, String cId, Integer totalTime, Integer totalPay) {
+        this.cName = cName;
+        this.cId = cId;
+        this.totalTime = totalTime;
+        this.totalPay = totalPay;
+    }
+
+    public Customer(String cName, String cId, Integer totalTime, Integer totalPay, Group group) {
+        this.cName = cName;
+        this.cId = cId;
+        this.totalTime = totalTime;
+        this.totalPay = totalPay;
+        this.group = group;
+    }
+
+    public String getcName() {
+        return cName;
+    }
+
+    public void setcName(String cName) {
+        this.cName = cName;
+    }
+
+    public String getcId() {
+        return cId;
+    }
+
+    public void setcId(String cId) {
+        this.cId = cId;
+    }
+
+    public Integer getTotalTime() {
+        return totalTime;
+    }
+
+    public void setTotalTime(Integer totalTime) {
+        this.totalTime = totalTime;
+    }
+
+    public Integer getTotalPay() {
+        return totalPay;
+    }
+
+    public void setTotalPay(Integer totalPay) {
+        this.totalPay = totalPay;
+    }
+
+    public Group getGroup() {
+        return group;
+    }
+
+    public void setGroup(Group group) {
+        this.group = group;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        Customer customer = (Customer) o;
+        return Objects.equals(cId, customer.cId);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(cId);
+    }
+
+    @Override
+    public String toString() {
+        return "Customer{" +
+                "cName='" + cName + '\'' +
+                ", cId='" + cId + '\'' +
+                ", totalTime=" + totalTime +
+                ", totalPay=" + totalPay +
+                ", group=" + group +
+                '}';
+    }
+    @Override
+    public int compareTo(Customer o) {
+        return this.compareTo(o);
+    }
+}

me/smartstore/customer/Customers.java

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+package me.smartstore.customer;
+
+import me.smartstore.arrays.DArray;
+import me.smartstore.group.Group;
+import me.smartstore.group.GroupType;
+import me.smartstore.group.Groups;
+
+public class Customers extends DArray<Customer> {
+    private final Groups allGroups = Groups.getInstance();
+    private static Customers allCustomers;
+
+    public static Customers getInstance() {
+        if (allCustomers == null) {
+            allCustomers = new Customers();
+        }
+        return allCustomers;
+    }
+
+    private Customers() {}
+
+    // refresh 함수가 호출되는 경우
+    // 1. 분류기준 바뀔 때
+    // 2. 새로운 고객이 들어올 때
+    public void refresh() {
+        for (int i = 0; i < allCustomers.size(); i++) {
+            Customer customer = allCustomers.get(i);
+            Group group = findGroup(customer.getTotalTime(), customer.getTotalPay());
+            customer.setGroup(group);
+        }
+    }
+
+    public Group findGroup(int totalTime, int totalPay){
+        try {
+            if(totalTime >= allGroups.find(GroupType.VVIP).getParameter().getMinTime() && totalPay>=allGroups.find(GroupType.VVIP).getParameter().getMinPay()){
+                return allGroups.find(GroupType.VVIP);
+            } else if (totalTime >= allGroups.find(GroupType.VIP).getParameter().getMinTime() && totalPay>=allGroups.find(GroupType.VIP).getParameter().getMinPay()) {
+                return allGroups.find(GroupType.VIP);
+            } else if (totalTime >= allGroups.find(GroupType.GENERAL).getParameter().getMinTime() && totalPay>=allGroups.find(GroupType.GENERAL).getParameter().getMinPay()) {
+                return allGroups.find(GroupType.GENERAL);
+            } else{
+                return allGroups.find(GroupType.NONE);
+            }
+        } catch (NullPointerException e){
+            return null;
+        }
+    }
+}