HHH-9392 : SQLGrammarException while executing a entity graph with su…

…bgraphs (test case)

hibernate-entitymanager/src/test/java/org/hibernate/jpa/test/graphs/EntityGraphUsingFetchGraphTest.java

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+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * Copyright (c) 2015, 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.jpa.test.graphs;
+
+import javax.persistence.Entity;
+import javax.persistence.EntityGraph;
+import javax.persistence.EntityManager;
+import javax.persistence.GeneratedValue;
+import javax.persistence.GenerationType;
+import javax.persistence.Id;
+import javax.persistence.JoinColumn;
+import javax.persistence.ManyToOne;
+import javax.persistence.OneToOne;
+import javax.persistence.Subgraph;
+import javax.persistence.Temporal;
+import javax.persistence.TemporalType;
+import javax.persistence.TypedQuery;
+import java.util.Date;
+import java.util.List;
+
+import org.hibernate.Hibernate;
+import org.hibernate.jpa.test.BaseEntityManagerFunctionalTestCase;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertTrue;
+
+/**
+ * @author Baris Cubukcuoglu
+ */
+public class EntityGraphUsingFetchGraphTest extends BaseEntityManagerFunctionalTestCase {
+
+	@Override
+	protected Class<?>[] getAnnotatedClasses() {
+		return new Class[] {CustomerOrder.class, OrderPosition.class, Product.class, Address.class};
+	}
+
+	@Test
+	public void fetchSubGraphFromSubgraph() {
+		EntityManager em = getOrCreateEntityManager();
+		em.getTransaction().begin();
+
+		Address address = new Address();
+		address.city = "TestCity";
+
+		CustomerOrder customerOrder = new CustomerOrder();
+		customerOrder.shippingAddress = address;
+
+		Product product = new Product();
+
+		OrderPosition orderPosition = new OrderPosition();
+		orderPosition.product = product;
+
+		customerOrder.orderPosition = orderPosition;
+		em.persist( address );
+		em.persist( orderPosition );
+		em.persist( product );
+		em.persist( customerOrder );
+
+		em.getTransaction().commit();
+		em.clear();
+
+		em.getTransaction().begin();
+
+		final EntityGraph<CustomerOrder> entityGraph = em.createEntityGraph( CustomerOrder.class );
+		//entityGraph.addAttributeNodes( "shippingAddress", "orderDate" );
+		entityGraph.addAttributeNodes( "shippingAddress" );
+
+		final Subgraph<OrderPosition> orderProductsSubgraph = entityGraph.addSubgraph( "orderPosition" );
+		//orderProductsSubgraph.addAttributeNodes( "amount" );
+
+		final Subgraph<Product> productSubgraph = orderProductsSubgraph.addSubgraph( "product" );
+		//productSubgraph.addAttributeNodes( "productName" );
+
+		TypedQuery<CustomerOrder> query = em.createQuery(
+				"SELECT o FROM EntityGraphUsingFetchGraphTest$CustomerOrder o", CustomerOrder.class
+		);
+		query.setHint( "javax.persistence.loadgraph", entityGraph );
+		final List<CustomerOrder> results = query.getResultList();
+
+		assertTrue( Hibernate.isInitialized( results ) );
+
+		em.getTransaction().commit();
+		em.close();
+	}
+
+	@Test
+	public void fetchAttributeNodeFromSubgraph() {
+		EntityManager em = getOrCreateEntityManager();
+		em.getTransaction().begin();
+
+		Address address = new Address();
+		address.city = "TestCity";
+
+		CustomerOrder customerOrder = new CustomerOrder();
+		customerOrder.shippingAddress = address;
+
+		Product product = new Product();
+
+		OrderPosition orderPosition = new OrderPosition();
+		orderPosition.product = product;
+
+		customerOrder.orderPosition = orderPosition;
+		em.persist( address );
+		em.persist( orderPosition );
+		em.persist( product );
+		em.persist( customerOrder );
+
+		em.getTransaction().commit();
+		em.clear();
+
+		em.getTransaction().begin();
+
+		final EntityGraph<CustomerOrder> entityGraph = em.createEntityGraph( CustomerOrder.class );
+		//entityGraph.addAttributeNodes( "shippingAddress", "orderDate" );
+		entityGraph.addAttributeNodes( "shippingAddress" );
+
+		final Subgraph<OrderPosition> orderProductsSubgraph = entityGraph.addSubgraph( "orderPosition" );
+		//orderProductsSubgraph.addAttributeNodes( "amount" );
+		orderProductsSubgraph.addAttributeNodes( "product" );
+
+		//final Subgraph<Product> productSubgraph = orderProductsSubgraph.addSubgraph( "product" );
+		//productSubgraph.addAttributeNodes( "productName" );
+
+		TypedQuery<CustomerOrder> query = em.createQuery(
+				"SELECT o FROM EntityGraphUsingFetchGraphTest$CustomerOrder o", CustomerOrder.class
+		);
+		query.setHint( "javax.persistence.loadgraph", entityGraph );
+		final List<CustomerOrder> results = query.getResultList();
+
+		assertTrue( Hibernate.isInitialized( results ) );
+
+		em.getTransaction().commit();
+		em.close();
+	}
+
+	@Entity
+	public static class CustomerOrder {
+		@Id
+		@GeneratedValue(strategy = GenerationType.IDENTITY)
+		public Long id;
+
+		@OneToOne
+		public OrderPosition orderPosition;
+
+		@Temporal(TemporalType.TIMESTAMP)
+		public Date orderDate;
+
+		@OneToOne
+		public Address shippingAddress;
+	}
+
+	@Entity
+	public static class Address {
+		@Id
+		@GeneratedValue(strategy = GenerationType.IDENTITY)
+		public Long id;
+
+		public String city;
+	}
+
+	@Entity
+	public static class OrderPosition {
+		@Id
+		@GeneratedValue(strategy = GenerationType.IDENTITY)
+		public Long id;
+
+		public Integer amount;
+
+		@ManyToOne
+		@JoinColumn(name = "product")
+		public Product product;
+	}
+
+	@Entity
+	public static class Product {
+		@Id
+		@GeneratedValue(strategy = GenerationType.IDENTITY)
+		public Long id;
+
+		public String productName;
+	}
+}