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

ToyProject/src/me/smartstore/Main.java

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

ToyProject/src/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;
+
+    // singletone pattern
+    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 : 23.05.00");
+        System.out.println(" Copyright 2023 JeonghoSong All rights reserved.");
+        System.out.println("===========================================\n");
+    }
+
+    public SmartStoreApp test() {
+        allGroups.add(new Group(new Parameter(0, 0), GroupType.NONE));
+        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++) {
+            int spentTime = ((int) (Math.random() * 5) + 1) * 10;
+            int totalPay = ((int) (Math.random() * 5) + 1) * 100000;
+
+//            Group customerGroup = allGroups.getGroupByParameter(spentTime, totalPay);
+
+//            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));
+
+//            allCustomers.add(new Customer(
+//                    Character.toString(
+//                            (char) ('a' + i) + "123",
+//                            spentTime,
+//                            totalPay,
+//                            customerGroup
+//                    )
+//            ));
+
+//            // 마지막 사용하던 코드
+//            allCustomers.add(new Customer(
+//                    Character.toString(
+//                            (char) ('a' + i)),
+//                    (char) ('a' + i) + "123",
+//                    spentTime,
+//                    totalPay,
+//                    customerGroup));
+        }
+
+        System.out.println("allCustomers = " + allCustomers);
+        System.out.println("allGroups = " + allGroups);
+
+        return this;
+    }
+
+    public void run() {
+        details();
+        mainMenu.manage();
+    }
+
+}

ToyProject/src/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);
+    void extend();
+}

ToyProject/src/me/smartstore/arrays/DArray.java

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+package me.smartstore.arrays;
+
+import me.smartstore.exception.EmptyArrayException;
+import me.smartstore.group.Group;
+import me.smartstore.util.Message;
+
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.Objects;
+import java.util.stream.IntStream;
+
+import static java.util.Arrays.copyOf;
+
+public class DArray<T> implements Collections<T> {
+
+    protected static final int DEFAULT = 10;
+
+    protected T[] arrays;
+    protected int size;
+    protected int capacity;
+
+    /**
+     * ClassCastException 예외 던지는 이유
+     * DArray Constructor에서 T타입이 Object 타입으로 캐스팅되는 과정에서 발생 가능
+     *
+     * 즉, T타입이 Object 타입과 호환되지 않아서 ClassCastException 예외 발생 가능
+     */
+    public DArray() throws ClassCastException {
+        arrays = (T[]) new Object[DEFAULT];
+        capacity = DEFAULT;
+    }
+
+    public DArray(int initial) throws ClassCastException {
+        arrays = (T[]) new Object[initial];
+        capacity = initial;
+    }
+
+    /**
+     * ClassCastException 안 던지는 이유
+     * T[] 배열을 이미 파라미터로 직접 전달 받음 > 예외 발생 가능성 없음
+     */
+    public DArray(T[] arrays) {
+        this.arrays = arrays;
+        capacity = arrays.length;
+        size = arrays.length;
+    }
+
+    @Override
+    public int size() {
+        return size;
+    }
+
+    /**
+     *
+     * @param index
+     * @return
+     * @throws IndexOutOfBoundsException
+     *
+     * 예외 처리를 두 번 해주는 이유
+     * 메서드 호출자가 index value를 잘못 전달할 경우 걸러지지 않음.
+     * if문 안에서는 인덱스 값이 유효하지 않은 경우에 대한 예외 처리 담당
+     */
+    @Override
+    public T get(int index) throws IndexOutOfBoundsException {
+        if (index < 0 || index >= size) throw new IndexOutOfBoundsException();
+        return arrays[index];
+    }
+
+    @Override
+    public void set(int index, T object) {
+
+    }
+
+    @Override
+    public int indexOf(T object) {
+        return 0;
+    }
+
+    @Override
+    public void add(T object) {
+//        if (object == null) {
+//            throw new
+//        }
+        if (size < capacity) {
+            arrays[size] = object;
+            size++;
+        } else {
+            extend();
+            add(object);
+        }
+    }
+
+    @Override
+    public void add(int index, T object) {
+
+    }
+
+    @Override
+    public T pop() {
+        return null;
+    }
+
+    @Override
+    public T pop(int index) throws EmptyArrayException, IndexOutOfBoundsException {
+        if (size==0) throw new EmptyArrayException(Message.ERR_MSG_ARR_EMPTY);
+        if (index < 0 || index > size) throw new IndexOutOfBoundsException(Message.ERR_MSG_ARR_OUT_OF_BOUNDARY);
+        T item = arrays[index];
+        for (int i = index; i < size; i++) {
+            arrays[i] = arrays[i+1];
+        }
+        size--;
+        return item;
+    }
+
+//    public boolean isEmpty() {
+//
+//    }
+
+    @Override
+    public T pop(T object) throws EmptyArrayException {
+        return pop(size-1);
+    }
+
+    /**
+     * 목적 : 리스트의 capacity가 모자랄 경우, *2만큼 증분하여 리스트 길이를 증가
+     */
+    @Override
+    public void extend() {
+        capacity *= 2;
+        arrays = copyOf(arrays, capacity);
+    }
+
+
+//    @Override
+//    public Iterator<T> iterator() {
+//        return IntStream.range(0, size)
+//                .mapToObj(i -> arrays[i])
+//                .iterator();
+//    }
+
+
+}

ToyProject/src/me/smartstore/customer/Customer.java

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+package me.smartstore.customer;
+
+import me.smartstore.group.Group;
+import me.smartstore.group.Groups;
+
+public class Customer {
+    private String customerName;
+    private String customerId;
+    private Integer customerTotalTime;
+    private Integer customerTotalPay;
+    private Group group; // 분류 기준에 따라 고객을 분류한 결과
+
+    public Customer() {
+    }
+
+    public Customer(String customerId) {
+        this.customerId = customerId;
+    }
+
+    public Customer(String customerName, String customerId) {
+        this.customerName = customerName;
+        this.customerId = customerId;
+    }
+
+    public Customer(String customerName, String customerId, Integer customerTotalTime, Integer customerTotalPay) {
+        this.customerName = customerName;
+        this.customerId = customerId;
+        this.customerTotalTime = customerTotalTime;
+        this.customerTotalPay = customerTotalPay;
+    }
+
+    public Customer(String customerName, String customerId, Integer customerTotalTime, Integer customerTotalPay, Group group) {
+        this.customerName = customerName;
+        this.customerId = customerId;
+        this.customerTotalTime = customerTotalTime;
+        this.customerTotalPay = customerTotalPay;
+    }
+
+    public void getCustomerInfo() {
+
+    }
+
+    public String getCustomerName() {
+        return customerName;
+    }
+
+    public void setCustomerName(String customerName) {
+        this.customerName = customerName;
+    }
+
+    public String getCustomerId() {
+        return customerId;
+    }
+
+    public void setCustomerId(String customerId) {
+        this.customerId = customerId;
+    }
+
+    public Integer getCustomerTotalTime() {
+        return customerTotalTime;
+    }
+
+    public void setCustomerTotalTime(Integer customerTotalTime) {
+        this.customerTotalTime = customerTotalTime;
+    }
+
+    public Integer getCustomerTotalPay() {
+        return customerTotalPay;
+    }
+
+    public void setCustomerTotalPay(Integer customerTotalPay) {
+        this.customerTotalPay = customerTotalPay;
+    }
+
+    public Group getGroup() {
+        return group;
+    }
+
+    public void setGroup(Group group) {
+        this.group = group;
+    }
+
+    @Override
+    public String toString() {
+        return "Customer{" +
+                "customerName='" + customerName + '\'' +
+                ", customerId='" + customerId + '\'' +
+                ", customerTotalTime=" + customerTotalTime +
+                ", customerTotalPay=" + customerTotalPay +
+                ", group=" + group +
+                '}';
+    }
+}