package com.bjsxt.hibernate;

import org.hibernate.Session;

import junit.framework.TestCase;

public class One2OneTest extends TestCase {
	
	
	public void saveOne2One() {
		Session session = null;
		try {
			session = HibernateUtils.getSession();
			session.beginTransaction();
			IdCard idCard = new IdCard();
			idCard.setCardNo("12345678909999999");
			
			Person person = new Person();
			person.setName("張三");
			
			//在兩個對象之間建立關聯(lián)
			person.setIdCard(idCard);
			
			//在一對一主鍵關聯(lián)映射中，存儲Person對象的時候，其關聯(lián)對象IdCard也被同時存儲
			//而不會拋出TransientObjectException,因為它默認了級聯(lián)屬性
			session.save(person);
			session.getTransaction().commit();
		}catch(Exception e) {
			e.printStackTrace();
			session.getTransaction().rollback();
		}finally {
			HibernateUtils.closeSession(session);
		}
	}
	

	public void saveOne2One1() {
		Session session = null;
		try {
			session = HibernateUtils.getSession();
			session.beginTransaction();
			
			IdCard idCard = new IdCard();
			idCard.setCardNo("12345678909999999");
			
			Person person = new Person();
			person.setName("張三");
			
			//在兩個對象之間建立關聯(lián)
			//person.setIdCard(idCard);
			idCard.setPerson(person);
			
			//不會保存成功，因為Person的ID依賴與IdCard的Id，而
			//person對象不持有IdCard的引用，也就是說，Person對象
			//中的idCard屬性為null,因此無法生成person對象的Id
			session.save(person);
			session.getTransaction().commit();
		}catch(Exception e) {
			e.printStackTrace();
			session.getTransaction().rollback();
		}finally {
			HibernateUtils.closeSession(session);
		}
	}
	
	
	/**
	 * 從Person加載數(shù)據(jù)
	 *
	 */
	public void testLoadOne2One() {
		Session session = null;
		try {
			session = HibernateUtils.getSession();
			session.beginTransaction();
			Person person = (Person)session.load(Person.class, 1);
			System.out.println("姓名：" + person.getName());
			System.out.println("身份證號：" + person.getIdCard().getCardNo());
			session.getTransaction().commit();
		}catch(Exception e) {
			e.printStackTrace();
			session.getTransaction().rollback();
		}finally {
			HibernateUtils.closeSession(session);
		}
	}
	
	/**
	 * 從IdCard加載數(shù)據(jù)
	 *
	 */
	public void testLoadOne2One1() {
		Session session = null;
		try {
			session = HibernateUtils.getSession();
			session.beginTransaction();
			IdCard idcard = (IdCard)session.load(IdCard.class, 1);
			System.out.println("姓名：" + idcard.getPerson().getName());
			System.out.println("身份證號：" + idcard.getCardNo());
			session.getTransaction().commit();
		}catch(Exception e) {
			e.printStackTrace();
			session.getTransaction().rollback();
		}finally {
			HibernateUtils.closeSession(session);
		}
	}
	
}