EmailContact.java

package com.example.model;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.OneToOne;
import javax.persistence.Table;

import org.springframework.beans.factory.annotation.Required;

@Entity
@Table(name = "email_contact")
public class EmailContact extends BaseObject {

    private static final long serialVersionUID = 6643356695108989062L;

    private Long id;
    private Customer customer;
    private String emailAddress;

    public EmailContact() {
        super();
    }

    public EmailContact(String emailAddress) {
        super();
        this.emailAddress = emailAddress;
    }

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    public Long getId() {
        return id;
    }

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

    @OneToOne
    @Required
    public Customer getCustomer() {
        return customer;
    }

    public void setCustomer(Customer customer) {
        if (this.customer != null && !this.customer.equals(customer)) {
            throw new RuntimeException("Invalid state: Customer cannot be changed on an existing EmailContact");
        }
        this.customer = customer;
    }

    @Column(name = "email_address", length = 255)
    @Required
    public String getEmailAddress() {
        return emailAddress;
    }

    public void setEmailAddress(String emailAddress) {
        this.emailAddress = emailAddress;
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((customer == null) ? 0 : customer.hashCode());
        result = prime * result + ((emailAddress == null) ? 0 : emailAddress.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;
        EmailContact other = (EmailContact) obj;
        if (customer == null) {
            if (other.customer != null)
                return false;
        } else if (!customer.equals(other.customer))
            return false;
        if (emailAddress == null) {
            if (other.emailAddress != null)
                return false;
        } else if (!emailAddress.equals(other.emailAddress))
            return false;
        return true;
    }

    @Override
    public String toString() {
        return "EmailContact [id=" + (id == null ? "null" : id.toString()) + ", customer=" + (customer==null?"null":customer.getCustomerNumber()) + ", emailAddress=" + emailAddress + "]";
    }
}