/*
    * Hibernate, Relational Persistence for Idiomatic Java
    *
    * Copyright (c) 2012, Red Hat Inc. or third-party contributors as
    * indicated by the @author tags or express copyright attribution
    * statements applied by the authors.  All third-party contributions are
    * distributed under license by Red Hat Inc.
    *
    * This copyrighted material is made available to anyone wishing to use, modify,
   * copy, or redistribute it subject to the terms and conditions of the GNU
   * Lesser General Public License, as published by the Free Software Foundation.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
   * for more details.
   *
   * You should have received a copy of the GNU Lesser General Public License
   * along with this distribution; if not, write to:
   * Free Software Foundation, Inc.
   * 51 Franklin Street, Fifth Floor
   * Boston, MA  02110-1301  USA
   */
  package org.hibernate.test.annotations.cascade.multicircle.jpa.identity;
  
  import junit.framework.Assert;
  import org.junit.After;
  import org.junit.Before;
  import org.junit.Test;
  
  import org.hibernate.Session;
  import org.hibernate.testing.DialectChecks;
  import org.hibernate.testing.RequiresDialectFeature;
  import org.hibernate.testing.junit4.BaseCoreFunctionalTestCase;
  
  /**
   * This test uses a complicated model that requires Hibernate to delay
   * inserts until non-nullable transient entity dependencies are resolved.
   *
   * All IDs are generated from an identity column.
   *
   * JPA cascade types are used (javax.persistence.CascadeType)..
   *
   * This test uses the following model:
   *
   * <code>
   *     ------------------------------ N G
   *     |
   *     |                                1
   *     |                                |
   *     |                                |
   *     |                                N
   *     |
   *     |         E N--------------0,1 * F
   *     |
   *     |         1                      N
   *     |         |                      |
   *     |         |                      |
   *     1         N                      |
   *     *                                |
   *     B * N---1 D * 1------------------
   *     *
   *     N         N
   *     |         |
   *     |         |
   *     1         |
   *               |
   *     C * 1-----
   *</code>
   *
   * In the diagram, all associations are bidirectional;
   * assocations marked with '*' cascade persist, save, merge operations to the
   * associated entities (e.g., B cascades persist to D, but D does not cascade
   * persist to B);
   *
   * b, c, d, e, f, and g are all transient unsaved that are associated with each other.
   *
   * When saving b, the entities are added to the ActionQueue in the following order:
   * c, d (depends on e), f (depends on d, g), e, b, g.
   *
   * Entities are inserted in the following order:
   * c, e, d, b, g, f.
   */
  @RequiresDialectFeature(DialectChecks.SupportsIdentityColumns.class)
  public class MultiCircleJpaCascadeIdentityTest extends BaseCoreFunctionalTestCase {
  	private B b;
  	private C c;
  	private D d;
  	private E e;
  	private F f;
  	private G g;
  
  	@Before
  	public void setup() {
  		b = new B();
  		c = new C();
  		d = new D();
  		e = new E();
  		f = new F();
 		g = new G();
 
 		b.getGCollection().add( g );
 		b.setC( c );
 		b.setD( d );
 
 		c.getBCollection().add( b );
 		c.getDCollection().add( d );
 
 		d.getBCollection().add( b );
 		d.setC( c );
 		d.setE( e );
 		d.getFCollection().add( f );
 
 		e.getDCollection().add( d );
 		e.setF( f );
 
 		f.getECollection().add( e );
 		f.setD( d );
 		f.setG( g );
 
 		g.setB( b );
 		g.getFCollection().add( f );
 	}
 
 	@After
 	public void cleanup() {
 		b.setC( null );
 		b.setD( null );
 		b.getGCollection().remove( g );
 
 		c.getBCollection().remove( b );
 		c.getDCollection().remove( d );
 
 		d.getBCollection().remove( b );
 		d.setC( null );
 		d.setE( null );
 		d.getFCollection().remove( f );
 
 		e.getDCollection().remove( d );
 		e.setF( null );
 
 		f.setD( null );
 		f.getECollection().remove( e );
 		f.setG( null );
 
 		g.setB( null );
 		g.getFCollection().remove( f );
 
 		Session s = openSession();
 		s.getTransaction().begin();
 		b = ( B ) s.merge( b );
 		c = ( C ) s.merge( c );
 		d = ( D ) s.merge( d );
 		e = ( E ) s.merge( e );
 		f = ( F ) s.merge( f );
 		g = ( G ) s.merge( g );
 		s.delete( f );
 		s.delete( g );
 		s.delete( b );
 		s.delete( d );
 		s.delete( e );
 		s.delete( c );
 		s.getTransaction().commit();
 		s.close();
 	}
 	@Test
 	public void testPersist() {
 		Session s = openSession();
 		s.getTransaction().begin();
 		s.persist( b );
 		s.getTransaction().commit();
 		s.close();
 
 		check();
 	}
 
 	@Test
 	public void testMerge() {
 		Session s = openSession();
 		s.getTransaction().begin();
 		b = (B) s.merge( b );
 		c = b.getC();
 		d = b.getD();
 		e = d.getE();
 		f = e.getF();
 		g = f.getG();
 		s.getTransaction().commit();
 		s.close();
 
 		check();
 	}
 
 	private void check() {
 		Session s = openSession();
 		s.getTransaction().begin();
 		B bRead = (B) s.get( B.class, b.getId() );
 		Assert.assertEquals( b, bRead );
 
 		G gRead = bRead.getGCollection().iterator().next();
 		Assert.assertEquals( g, gRead );
 		C cRead = bRead.getC();
 		Assert.assertEquals( c, cRead );
 		D dRead = bRead.getD();
 		Assert.assertEquals( d, dRead );
 
 		Assert.assertSame( bRead, cRead.getBCollection().iterator().next() );
 		Assert.assertSame( dRead, cRead.getDCollection().iterator().next() );
 
 		Assert.assertSame( bRead, dRead.getBCollection().iterator().next() );
 		Assert.assertEquals( cRead, dRead.getC() );
 		E eRead = dRead.getE();
 		Assert.assertEquals( e, eRead );
 		F fRead = dRead.getFCollection().iterator().next();
 		Assert.assertEquals( f, fRead );
 
 		Assert.assertSame( dRead, eRead.getDCollection().iterator().next() );
 		Assert.assertSame( fRead, eRead.getF() );
 
 		Assert.assertSame( eRead, fRead.getECollection().iterator().next() );
 		Assert.assertSame( dRead, fRead.getD() );
 		Assert.assertSame( gRead, fRead.getG());
 
 		Assert.assertSame( bRead, gRead.getB() );
 		Assert.assertSame( fRead, gRead.getFCollection().iterator().next() );
 
 		s.getTransaction().commit();
 		s.close();
 	}
 
 	@Override
 	protected Class[] getAnnotatedClasses() {
 		return new Class[]{
 				B.class,
 				C.class,
 				D.class,
 				E.class,
 				F.class,
 				G.class
 		};
 	}
 
 }