/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
 * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
 */
package org.hibernate.test.ops;

import org.hibernate.Hibernate;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.cfg.Environment;

import org.hibernate.testing.DialectChecks;
import org.hibernate.testing.RequiresDialectFeature;
import org.hibernate.testing.junit4.BaseCoreFunctionalTestCase;
import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;


/**
 * @author Gavin King
 */
@RequiresDialectFeature(DialectChecks.SupportsNoColumnInsert.class)
public class GetLoadTest extends BaseCoreFunctionalTestCase {
	@Override
	public void configure(Configuration cfg) {
		cfg.setProperty(Environment.GENERATE_STATISTICS, "true");
		cfg.setProperty(Environment.STATEMENT_BATCH_SIZE, "0");
	}

	@Override
	public String[] getMappings() {
		return new String[] { "ops/Node.hbm.xml", "ops/Employer.hbm.xml" };
	}

	@Test
	public void testGetLoad() {
		clearCounts();
		
		Session s = openSession();
		Transaction tx = s.beginTransaction();
		Employer emp = new Employer();
		s.persist(emp);
		Node node = new Node("foo");
		Node parent = new Node("bar");
		parent.addChild(node);
		s.persist(parent);
		tx.commit();
		s.close();
		
		s = openSession();
		tx = s.beginTransaction();
		emp = (Employer) s.get(Employer.class, emp.getId());
		assertTrue( Hibernate.isInitialized(emp) );
		assertFalse( Hibernate.isInitialized(emp.getEmployees()) );
		node = (Node) s.get(Node.class, node.getName());
		assertTrue( Hibernate.isInitialized(node) );
		assertFalse( Hibernate.isInitialized(node.getChildren()) );
		assertFalse( Hibernate.isInitialized(node.getParent()) );
		assertNull( s.get(Node.class, "xyz") );
		tx.commit();
		s.close();

		s = openSession();
		tx = s.beginTransaction();
		emp = (Employer) s.load(Employer.class, emp.getId());
		emp.getId();
		assertFalse( Hibernate.isInitialized(emp) );
		node = (Node) s.load(Node.class, node.getName());
		assertEquals( node.getName(), "foo" );
		assertFalse( Hibernate.isInitialized(node) );
		tx.commit();
		s.close();
	
		s = openSession();
		tx = s.beginTransaction();
		emp = (Employer) s.get("org.hibernate.test.ops.Employer", emp.getId());
		assertTrue( Hibernate.isInitialized(emp) );
		node = (Node) s.get("org.hibernate.test.ops.Node", node.getName());
		assertTrue( Hibernate.isInitialized(node) );
		tx.commit();
		s.close();

		s = openSession();
		tx = s.beginTransaction();
		emp = (Employer) s.load("org.hibernate.test.ops.Employer", emp.getId());
		emp.getId();
		assertFalse( Hibernate.isInitialized(emp) );
		node = (Node) s.load("org.hibernate.test.ops.Node", node.getName());
		assertEquals( node.getName(), "foo" );
		assertFalse( Hibernate.isInitialized(node) );
		tx.commit();
		s.close();
		
		assertFetchCount(0);
	}

	@Test
	public void testGetAfterDelete() {
		clearCounts();

		Session s = openSession();
		s.beginTransaction();
		Employer emp = new Employer();
		s.persist( emp );
		s.getTransaction().commit();
		s.close();

		s = openSession();
		s.beginTransaction();
		s.delete( emp );
		emp = s.get( Employer.class, emp.getId() );
		s.getTransaction().commit();
		s.close();

		assertNull( "get did not return null after delete", emp );
	}

	private void clearCounts() {
		sessionFactory().getStatistics().clear();
	}
	
	private void assertFetchCount(int count) {
		int fetches = (int) sessionFactory().getStatistics().getEntityFetchCount();
		assertEquals(count, fetches);
	}


}

