[Design Pattern] #0. Value Object

VO는 다음과 같은 과정으로 생성한다.

1. public class 생성

2. [implements Serializable (입출력 가능한 객체)] - 객체를 파일에 저장하기 위한 장치.

3. 생성자

- no_args

- 전체 인스턴스 초기화 생성자

- +a 필요한 생성자 생성.

4. private instance 변수 생성

5. public setter/getter 메소드

6. toString() Overriding -> instance variable 값들을 하나의 문자열로 return 하도록 재정의

7. equals() / hashCode() : overriding

- instance variable 값이 같으면 같은 객체가 되도록 재정의

public class Customer implements Serializable{

	private String id;
	private String password;
	private String name;
	private String email;
	private String phoneNumber;
	private int mileage;
	
	
	public Customer() {
		super();
	}
	
	public Customer(String id, String password, String name, String phoneNumber,
			String email, int mileage) {
		super();
		this.id = id;
		this.password = password;
		this.name = name;
		this.email = email;
		this.phoneNumber = phoneNumber;
		this.mileage = mileage;
	}
	
	
	

	public String getId() {
		return id;
	}

	public void setId(String id) {
		this.id = id;
	}

	public String getPassword() {
		return password;
	}

	public void setPassword(String password) {
		this.password = password;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getEmail() {
		return email;
	}

	public void setEmail(String email) {
		this.email = email;
	}

	public String getPhoneNumber() {
		return phoneNumber;
	}

	public void setPhoneNumber(String phoneNumber) {
		this.phoneNumber = phoneNumber;
	}

	public int getMileage() {
		return mileage;
	}

	public void setMileage(int mileage) {
		this.mileage = mileage;
	}

	@Override
	public String toString() {
		return "Customer [id=" + id + ", password=" + password + ", name="
				+ name + ", email=" + email + ", phoneNumber=" + phoneNumber
				+ ", mileage=" + mileage + "]";
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((email == null) ? 0 : email.hashCode());
		result = prime * result + ((id == null) ? 0 : id.hashCode());
		result = prime * result + mileage;
		result = prime * result + ((name == null) ? 0 : name.hashCode());
		result = prime * result
				+ ((password == null) ? 0 : password.hashCode());
		result = prime * result
				+ ((phoneNumber == null) ? 0 : phoneNumber.hashCode());
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Customer other = (Customer) obj;
		if (email == null) {
			if (other.email != null)
				return false;
		} else if (!email.equals(other.email))
			return false;
		if (id == null) {
			if (other.id != null)
				return false;
		} else if (!id.equals(other.id))
			return false;
		if (mileage != other.mileage)
			return false;
		if (name == null) {
			if (other.name != null)
				return false;
		} else if (!name.equals(other.name))
			return false;
		if (password == null) {
			if (other.password != null)
				return false;
		} else if (!password.equals(other.password))
			return false;
		if (phoneNumber == null) {
			if (other.phoneNumber != null)
				return false;
		} else if (!phoneNumber.equals(other.phoneNumber))
			return false;
		return true;
	}
}