FastCampusKDTBackend · inyoung0215 · May 10, 2023
diff --git a/me/smartstore/Main.java b/me/smartstore/Main.java
@@ -0,0 +1,8 @@
+package me.smartstore;
+
+public class Main {
+    public static void main(String[] args) {
+        SmartStoreApp.getInstance().test().run(); // function chaining
+//        SmartStoreApp.getInstance().run();
+    }
+}
diff --git a/me/smartstore/SmartStoreApp.java b/me/smartstore/SmartStoreApp.java
@@ -0,0 +1,64 @@
+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();
+
+    // singleton
+    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 : 23.05.09");
+        System.out.println(" Copyright 2023 Inyoung 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);
+
+        allCustomers.refresh(allGroups);
+
+        return this;
+    }
+
+    public void run() {
+        details();
+        mainMenu.manage();
+
+    }
+}
diff --git a/me/smartstore/arrays/Collections.java b/me/smartstore/arrays/Collections.java
@@ -0,0 +1,15 @@
+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);
+}
diff --git a/me/smartstore/arrays/DArray.java b/me/smartstore/arrays/DArray.java
@@ -0,0 +1,140 @@
+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;
+
+    @SuppressWarnings("unchecked")
+    public DArray() {
+        arrays = (T[]) new Object[DEFAULT];
+        capacity = DEFAULT;
+    }
+
+    @SuppressWarnings("unchecked")
+    public DArray(int initial) {
+        arrays = (T[]) new Object[initial];
+        capacity = initial;
+    }
+
+    public DArray(T[] arrays) {
+        this.arrays = arrays;
+        capacity = arrays.length;
+        size = arrays.length;
+    }
+
+    @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];
+    }
+
+
+    @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
+    }
+
+    @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;
+    }
+}
diff --git a/me/smartstore/customer/Customer.java b/me/smartstore/customer/Customer.java
@@ -0,0 +1,100 @@
+package me.smartstore.customer;
+
+import me.smartstore.group.Group;
+
+import java.util.Objects;
+
+public class Customer implements Comparable<Customer>{
+    private String cusName;
+    private String cusId;
+    private Integer cusTotalTime;
+    private Integer cusTotalPay;
+    private Group group; // 현재 분류 기준에 의해 각 고객을 분류된 결과
+
+    public Customer() {
+    }
+
+    public Customer(String cusId) {
+        this.cusId = cusId;
+    }
+
+    public Customer(String cusName, String cusId) {
+        this.cusName = cusName;
+        this.cusId = cusId;
+    }
+
+    public Customer(String cusName, String cusId, Integer cusTotalTime, Integer cusTotalPay) {
+        this.cusName = cusName;
+        this.cusId = cusId;
+        this.cusTotalTime = cusTotalTime;
+        this.cusTotalPay = cusTotalPay;
+    }
+
+    public String getCusName() {
+        return cusName;
+    }
+
+    public void setCusName(String cusName) {
+        this.cusName = cusName;
+    }
+
+    public String getCusId() {
+        return cusId;
+    }
+
+    public void setCusId(String cusId) {
+        this.cusId = cusId;
+    }
+
+    public Integer getCusTotalTime() {
+        return cusTotalTime;
+    }
+
+    public void setCusTotalTime(Integer cusTotalTime) {
+        this.cusTotalTime = cusTotalTime;
+    }
+
+    public Integer getCusTotalPay() {
+        return cusTotalPay;
+    }
+
+    public void setCusTotalPay(Integer cusTotalPay) {
+        this.cusTotalPay = cusTotalPay;
+    }
+
+    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(cusId, customer.cusId);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(cusId);
+    }
+
+    @Override
+    public String toString() {
+        return "Customer{" +
+                "cusName='" + cusName + '\'' +
+                ", cusId='" + cusId + '\'' +
+                ", cusTotalTime=" + cusTotalTime +
+                ", cusTotalPay=" + cusTotalPay +
+                '}';
+    }
+
+    @Override
+    public int compareTo(Customer o) {
+        return this.cusName.compareTo(o.cusName);
+    }
+}
diff --git a/me/smartstore/customer/Customers.java b/me/smartstore/customer/Customers.java
@@ -0,0 +1,51 @@
+package me.smartstore.customer;
+
+import me.smartstore.arrays.DArray;
+import me.smartstore.group.Group;
+import me.smartstore.group.Groups;
+
+public class Customers extends DArray<Customer> {
+
+    private static Customers allCustomers;
+    private final Groups allGroups = Groups.getInstance();
+
+    public static Customers getInstance() {
+        if (allCustomers == null) {
+            allCustomers = new Customers();
+        }
+        return allCustomers;
+    }
+
+    private Customers() {
+    }
+
+    public void refresh(Customer customer) {
+        int time = customer.getCusTotalTime();
+        int pay = customer.getCusTotalPay();
+        for (int i = 0; i < allGroups.size(); i++) {
+            if (time >= allGroups.get(i).getParameter().getMinTime()
+                    && pay >= allGroups.get(i).getParameter().getMinPay()) {
+                customer.setGroup(allGroups.get(i));
+            }
+        }
+    }
+
+    public void refresh(Groups groups) {
+        for (int i = 0; i < allCustomers.size(); i++) {
+            Customer customer = allCustomers.get(i);
+            Group customerGroup = customer.getGroup();
+            if (customerGroup == null) {
+                continue;
+            }
+            for (int j = 0; j < groups.size(); j++) {
+                Group group = groups.get(j);
+                if (customer.getCusTotalTime() >= group.getParameter().getMinTime()
+                        && customer.getCusTotalPay() >= group.getParameter().getMinPay()) {
+                    customer.setGroup(group);
+                    break;
+                }
+            }
+        }
+    }
+}
+
diff --git a/me/smartstore/exception/ElementNotFoundException.java b/me/smartstore/exception/ElementNotFoundException.java
@@ -0,0 +1,12 @@
+package me.smartstore.exception;
+import me.smartstore.util.Message;
+public class ElementNotFoundException extends RuntimeException {
+    public ElementNotFoundException(){
+        super(Message.ERR_MSG_NULL_ARR_ELEMENT);
+    }
+
+    public ElementNotFoundException(String message){
+        super(message);
+    }
+
+}