#21 - Work on generics / parameterized-types

Author: sebersole

src/main/java/org/hibernate/models/spi/ObjectClassDetails.java

@@ -33,6 +33,11 @@ public String getClassName() {
 		return Object.class.getName();
 	}
 
+	@Override
+	public String toString() {
+		return "ClassDetails(java.lang.Object)";
+	}
+
 	@Override
 	public boolean isResolved() {
 		return true;

src/test/java/org/hibernate/models/classes/GenericsTests.java

@@ -0,0 +1,98 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * Copyright: Red Hat Inc. and Hibernate Authors
+ */
+
+package org.hibernate.models.classes;
+
+import org.hibernate.models.SourceModelTestHelper;
+import org.hibernate.models.internal.SourceModelBuildingContextImpl;
+import org.hibernate.models.spi.ClassDetails;
+import org.hibernate.models.spi.ClassDetailsRegistry;
+import org.hibernate.models.spi.ObjectClassDetails;
+
+import org.junit.jupiter.api.Test;
+
+import org.jboss.jandex.Index;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.MappedSuperclass;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * @author Steve Ebersole
+ */
+public class GenericsTests {
+	@Test
+	void testWrappedId() {
+		final SourceModelBuildingContextImpl buildingContext = SourceModelTestHelper.createBuildingContext(
+				(Index) null,
+				Base.class,
+				Thing1.class,
+				Thing2.class
+		);
+
+		final ClassDetailsRegistry classDetailsRegistry = buildingContext.getClassDetailsRegistry();
+
+		final ClassDetails baseClassDetails = classDetailsRegistry.getClassDetails( Base.class.getName() );
+		final ClassDetails idType = baseClassDetails.findFieldByName( "id" ).getType();
+		assertThat( idType.getName() ).isEqualTo( IdWrapper.class.getName() );
+		final ClassDetails wrappedType = idType.findFieldByName( "value" ).getType();
+		assertThat( wrappedType ).isSameAs( ObjectClassDetails.OBJECT_CLASS_DETAILS );
+	}
+
+	@Test
+	void testId() {
+		final SourceModelBuildingContextImpl buildingContext = SourceModelTestHelper.createBuildingContext(
+				(Index) null,
+				Base2.class,
+				Thing3.class,
+				Thing4.class
+		);
+
+		final ClassDetailsRegistry classDetailsRegistry = buildingContext.getClassDetailsRegistry();
+
+		final ClassDetails baseClassDetails = classDetailsRegistry.getClassDetails( Base2.class.getName() );
+		assertThat( baseClassDetails.getFields() ).hasSize( 2 );
+		final ClassDetails idType = baseClassDetails.findFieldByName( "id" ).getType();
+		assertThat( idType ).isSameAs( ObjectClassDetails.OBJECT_CLASS_DETAILS );
+	}
+
+	public static class IdWrapper<T> {
+		T value;
+	}
+
+	@MappedSuperclass
+	public static class Base<I> {
+		@Id
+		private IdWrapper<I> id;
+		private String name;
+	}
+
+	@Entity
+	public static class Thing1 extends Base<Integer> {
+	}
+
+	@Entity
+	public static class Thing2 extends Base<String> {
+	}
+
+	@MappedSuperclass
+	public static class Base2<I> {
+		@Id
+		private I id;
+		private String name;
+	}
+
+	@Entity
+	public static class Thing3 extends Base2<Integer> {
+	}
+
+	@Entity
+	public static class Thing4 extends Base<String> {
+	}
+}