HHH-15759 Add test for issue

hibernate-core/src/test/java/org/hibernate/orm/test/annotations/collectionelement/ElementCollectionWithEntityAndFKForElementTest.java

@@ -0,0 +1,167 @@
+package org.hibernate.orm.test.annotations.collectionelement;
+
+import java.io.Serializable;
+import java.util.Set;
+
+import org.hibernate.testing.TestForIssue;
+import org.hibernate.testing.orm.junit.EntityManagerFactoryScope;
+import org.hibernate.testing.orm.junit.Jpa;
+import org.junit.jupiter.api.Test;
+
+import jakarta.persistence.CollectionTable;
+import jakarta.persistence.Column;
+import jakarta.persistence.ElementCollection;
+import jakarta.persistence.Embeddable;
+import jakarta.persistence.EmbeddedId;
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.JoinColumns;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.Table;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+@Jpa(
+		annotatedClasses = {
+				ElementCollectionWithEntityAndFKForElementTest.CollectionHolder.class,
+				ElementCollectionWithEntityAndFKForElementTest.ElementHolder.class,
+				ElementCollectionWithEntityAndFKForElementTest.Element.class,
+		}
+
+)
+@TestForIssue(jiraKey = "HHH-15759")
+public class ElementCollectionWithEntityAndFKForElementTest {
+
+
+	@Test
+	public void testLifecycle(EntityManagerFactoryScope scope) {
+		scope.inTransaction(
+				entityManager -> {
+					CollectionHolder collectionHolder = new CollectionHolder( 1L, Set.of( "collectionElement" ) );
+					entityManager.persist( collectionHolder );
+
+					Element element = new Element( new ElementEmbeddedId( "collectionElement2", 1L ) );
+					ElementHolder elementHolder = new ElementHolder( 2L, element );
+					entityManager.persist( elementHolder );
+					entityManager.persist( element );
+				} );
+
+		scope.inTransaction(
+				entityManager -> {
+					ElementHolder elementHolder = entityManager.find( ElementHolder.class, 2L );
+					assertEquals( "collectionElement2", elementHolder.getElement().getId().getElement() );
+				} );
+	}
+
+	@Embeddable
+	public static class ElementEmbeddedId implements Serializable {
+		private String element;
+
+		@Column(name = "parent_id")
+		private Long parentId;
+
+		public ElementEmbeddedId() {
+		}
+
+		public ElementEmbeddedId(String element, Long parentId) {
+			this.parentId = parentId;
+			this.element = element;
+		}
+
+		public String getElement() {
+			return element;
+		}
+
+		public Long getParentId() {
+			return parentId;
+		}
+	}
+
+	@Entity
+	@Table(name = "element_table")
+	public static class Element {
+
+		@EmbeddedId
+		private ElementEmbeddedId id;
+
+		private String name;
+
+		public Element(ElementEmbeddedId id) {
+			this.id = id;
+		}
+
+		public Element() {
+		}
+
+		public ElementEmbeddedId getId() {
+			return id;
+		}
+	}
+
+	@Entity
+	@Table(name = "element_holder")
+	public static class ElementHolder {
+
+		@Id
+		private Long id;
+
+		private String name;
+
+		@ManyToOne
+		@JoinColumns(
+				value = {
+						@JoinColumn(name = "parent_id", referencedColumnName = "parent_id"),
+						@JoinColumn(name = "element", referencedColumnName = "element")
+				}
+		)
+		private Element element;
+
+		public ElementHolder(Long id, Element element) {
+			this.id = id;
+			this.element = element;
+		}
+
+		public ElementHolder() {
+		}
+
+		public Long getId() {
+			return id;
+		}
+
+		public Element getElement() {
+			return element;
+		}
+	}
+
+	@Entity
+	@Table(name = "collection_holder")
+	public static class CollectionHolder {
+		@Id
+		private Long id;
+
+		private String name;
+
+		@ElementCollection(fetch = FetchType.EAGER)
+		@Column(name = "element", nullable = false)
+		@CollectionTable(name = "elements", joinColumns = @JoinColumn(name = "parent_id", referencedColumnName = "id"))
+		private Set<String> elements;
+
+		public CollectionHolder(Long id, Set<String> elements) {
+			this.id = id;
+			this.elements = elements;
+		}
+
+		public CollectionHolder() {
+		}
+
+		public Long getId() {
+			return id;
+		}
+
+		public Set<String> getElements() {
+			return elements;
+		}
+	}
+}