move package

OOP/projects/OBJECTS/OBJECTS.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

OOP/projects/OBJECTS/ch01/README.md

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+# 01 티켓 판매 애플리케이션 구현하기
+
+## 요구사항
+
+- 관람객 맞이하기
+- 이벤트에 당첨된 관람객과 그렇지 않은 관람객을 다르게 입장시켜야한다.
+- 당첨된 관람객은 초대장을 티켓으로 교환한 후에 입장 가능하다.
+- 당첨되지 않은 관람객은 티켓을 구매한 다음에 입장 가능하다.

OOP/projects/OBJECTS/ch01/ch01_01/Audience.java

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+package ch01.ch01_01;
+
+/**
+ * 관람객
+ */
+public class Audience {
+
+	private Bag bag;
+
+	public Audience(Bag bag) {
+		this.bag = bag;
+	}
+
+	public Bag getBag() {
+		return bag;
+	}
+
+}

OOP/projects/OBJECTS/ch01/ch01_01/Bag.java

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+package ch01.ch01_01;
+
+import ch01.ch01_01.Ticket;
+
+/**
+ * 관람객이 소지품을 보관할 용도로 들고오는 가방
+ */
+public class Bag {
+
+	private Long amount;
+	private Invitation invitation;
+	private Ticket ticket;
+
+	// 이벤트 당첨되지 않은 관람객은 초대장이 없다.
+	public Bag(long amount) { // Long이 아닌 long 을 사용함으로써 인스턴스 생성 시점에 amount가 null인 것을 방지
+		this(null, amount);
+	}
+
+	// 이벤트 당첨된 관람객
+	public Bag(Invitation invitation, long amount) {
+		this.amount = amount;
+		this.invitation = invitation;
+	}
+
+	public boolean hasInvitation() {
+		return invitation != null;
+	}
+
+	public boolean hasTicket() {
+		return ticket != null;
+	}
+
+	public void setTicket(Ticket ticket) {
+		this.ticket = ticket;
+	}
+
+	public void minusAmount(Long amount) {
+		this.amount -= amount;
+	}
+
+	public void plusAmount(Long amount) {
+		this.amount += amount;
+	}
+
+}

OOP/projects/OBJECTS/ch01/ch01_01/Invitation.java

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+package ch01.ch01_01;
+
+import java.time.LocalDateTime;
+
+public class Invitation {
+
+	private LocalDateTime when;
+
+}

OOP/projects/OBJECTS/ch01/ch01_01/Theater.java

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+package ch01.ch01_01;
+
+/**
+ * 소극장
+ */
+public class Theater {
+
+	private TicketSeller ticketSeller;
+
+	public Theater(TicketSeller ticketSeller) {
+		this.ticketSeller = ticketSeller;
+	}
+
+	public void enter(Audience audience) {
+		if (audience.getBag().hasInvitation()) {
+			Ticket ticket = ticketSeller.getTicketOffice().getTicket();
+			audience.getBag().setTicket(ticket);
+		} else {
+			Ticket ticket = ticketSeller.getTicketOffice().getTicket();
+			audience.getBag().minusAmount(ticket.getFee());
+			ticketSeller.getTicketOffice().plusAmount(ticket.getFee());
+			audience.getBag().setTicket(ticket);
+		}
+	}
+
+}

OOP/projects/OBJECTS/ch01/ch01_01/Ticket.java

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+package ch01.ch01_01;
+
+public class Ticket {
+
+	private Long fee;
+
+	public Long getFee() {
+		return fee;
+	}
+
+}

OOP/projects/OBJECTS/ch01/ch01_01/TicketOffice.java

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+package ch01.ch01_01;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * 매표소.
+ * 관람객이 소극장 입장할 때 매표소에서 초대장을 티켓으로 교환하거나 구매.
+ */
+public class TicketOffice {
+
+	private Long amount;
+	private List<Ticket> tickets = new ArrayList<>();
+
+	public TicketOffice(Long amount, List<Ticket> tickets) {
+		this.amount = amount;
+		this.tickets = tickets;
+	}
+
+	public Ticket getTicket() {
+		return tickets.remove(0);
+	}
+
+	public void minusAmount(Long amount) {
+		this.amount -= amount;
+	}
+
+	public void plusAmount(Long amount) {
+		this.amount += amount;
+	}
+
+}

OOP/projects/OBJECTS/ch01/ch01_01/TicketSeller.java

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+package ch01.ch01_01;
+
+/**
+ * 판매원.
+ * 매표소에서 초대장을 티켓으로 교환해 주거나 티켓을 판매하는 역할 수행.
+ */
+public class TicketSeller {
+
+	private TicketOffice ticketOffice;
+
+	public TicketSeller(TicketOffice ticketOffice) {
+		this.ticketOffice = ticketOffice;
+	}
+
+	public TicketOffice getTicketOffice() {
+		return ticketOffice;
+	}
+
+}

OOP/projects/OBJECTS/ch01/ch01_03/Audience.java

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+package ch01.ch01_03;
+
+/**
+ * 관람객
+ */
+public class Audience {
+
+	private Bag bag;
+
+	public Audience(Bag bag) {
+		this.bag = bag;
+	}
+
+	public Bag getBag() {
+		return bag;
+	}
+
+	public long buy(Ticket ticket) {
+		if (this.bag.hasInvitation()) {
+			this.bag.setTicket(ticket);
+			return 0L;
+		} else {
+			this.bag.setTicket(ticket);
+			this.bag.minusAmount(ticket.getFee());
+			return ticket.getFee();
+		}
+	}
+
+}

OOP/projects/OBJECTS/ch01/ch01_03/Bag.java

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+package ch01.ch01_03;
+
+/**
+ * 관람객이 소지품을 보관할 용도로 들고오는 가방
+ */
+public class Bag {
+
+	private Long amount;
+	private Invitation invitation;
+	private Ticket ticket;
+
+	// 이벤트 당첨되지 않은 관람객은 초대장이 없다.
+	public Bag(long amount) { // Long이 아닌 long 을 사용함으로써 인스턴스 생성 시점에 amount가 null인 것을 방지
+		this(null, amount);
+	}
+
+	// 이벤트 당첨된 관람객
+	public Bag(Invitation invitation, long amount) {
+		this.amount = amount;
+		this.invitation = invitation;
+	}
+
+	public boolean hasInvitation() {
+		return invitation != null;
+	}
+
+	public boolean hasTicket() {
+		return ticket != null;
+	}
+
+	public void setTicket(Ticket ticket) {
+		this.ticket = ticket;
+	}
+
+	public void minusAmount(Long amount) {
+		this.amount -= amount;
+	}
+
+	public void plusAmount(Long amount) {
+		this.amount += amount;
+	}
+
+}

OOP/projects/OBJECTS/ch01/ch01_03/Invitation.java

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+package ch01.ch01_03;
+
+import java.time.LocalDateTime;
+
+public class Invitation {
+
+	private LocalDateTime when;
+
+}

OOP/projects/OBJECTS/ch01/ch01_03/Theater.java

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+package ch01.ch01_03;
+
+/**
+ * 소극장
+ */
+public class Theater {
+
+	private TicketSeller ticketSeller;
+
+	public Theater(TicketSeller ticketSeller) {
+		this.ticketSeller = ticketSeller;
+	}
+
+	public void enter(Audience audience) {
+		ticketSeller.sellTo(audience);
+	}
+
+}

OOP/projects/OBJECTS/ch01/ch01_03/Ticket.java

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+package ch01.ch01_03;
+
+public class Ticket {
+
+	private Long fee;
+
+	public Long getFee() {
+		return fee;
+	}
+
+}

OOP/projects/OBJECTS/ch01/ch01_03/TicketOffice.java

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+package ch01.ch01_03;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * 매표소.
+ * 관람객이 소극장 입장할 때 매표소에서 초대장을 티켓으로 교환하거나 구매.
+ */
+public class TicketOffice {
+
+	private Long amount;
+	private List<Ticket> tickets = new ArrayList<>();
+
+	public TicketOffice(Long amount, List<Ticket> tickets) {
+		this.amount = amount;
+		this.tickets = tickets;
+	}
+
+	public Ticket getTicket() {
+		return tickets.remove(0);
+	}
+
+	public void minusAmount(Long amount) {
+		this.amount -= amount;
+	}
+
+	public void plusAmount(Long amount) {
+		this.amount += amount;
+	}
+
+}

OOP/projects/OBJECTS/ch01/ch01_03/TicketSeller.java

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+package ch01.ch01_03;
+
+/**
+ * 판매원.
+ * 매표소에서 초대장을 티켓으로 교환해 주거나 티켓을 판매하는 역할 수행.
+ */
+public class TicketSeller {
+
+	private TicketOffice ticketOffice;
+
+	public TicketSeller(TicketOffice ticketOffice) {
+		this.ticketOffice = ticketOffice;
+	}
+
+	public void sellTo(Audience audience) {
+		this.ticketOffice.plusAmount(audience.buy(ticketOffice.getTicket()));
+	}
+
+}