HHH-15211 add testing case

hibernate-core/src/test/java/org/hibernate/orm/test/mapping/converted/converter/elementCollection/embeddable/EmbeddableTests.java

@@ -0,0 +1,103 @@
+/*
+ * 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.orm.test.mapping.converted.converter.elementCollection.embeddable;
+
+import java.math.BigDecimal;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import org.hibernate.testing.TestForIssue;
+import org.hibernate.testing.orm.junit.DomainModel;
+import org.hibernate.testing.orm.junit.SessionFactory;
+import org.hibernate.testing.orm.junit.SessionFactoryScope;
+import org.junit.jupiter.api.Test;
+
+import jakarta.persistence.AttributeConverter;
+import jakarta.persistence.Converter;
+import jakarta.persistence.ElementCollection;
+import jakarta.persistence.Embeddable;
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+
+/**
+ * @author Nathan Xu
+ * @author Jeff Chee Yik Seng
+ */
+
+@DomainModel(annotatedClasses = {
+		EmbeddableTests.ProductEntity.class,
+		EmbeddableTests.MyBigDecimalConverter.class
+})
+@SessionFactory
+@TestForIssue(jiraKey = "HHH-15211")
+class EmbeddableTests {
+
+	@Test
+	void testNoClassCastExceptionThrown(SessionFactoryScope scope) {
+		final ProductEntity entity = new ProductEntity();
+		entity.prices = Collections.singletonList( new ProductPrice( new MyBigDecimal( 100.0 ) ) );
+		final Integer productId = scope.fromTransaction( session -> {
+			session.persist( entity );
+			return entity.productId;
+		} );
+
+		// without fixing, the following statement would thrown "ClassCastException"
+		scope.inTransaction( session -> session.get(
+				ProductEntity.class,
+				productId
+		) );
+	}
+
+	@Entity(name = "ProductEntity")
+	static class ProductEntity {
+		@Id
+		@GeneratedValue
+		Integer productId;
+
+		@ElementCollection(fetch = FetchType.EAGER)
+		List<ProductPrice> prices = new ArrayList<>();
+	}
+
+	@Embeddable
+	static class ProductPrice {
+		MyBigDecimal price;
+
+		ProductPrice() {}
+		ProductPrice(MyBigDecimal price) {
+			this.price = price;
+		}
+	}
+
+	static class MyBigDecimal {
+		double value;
+
+		MyBigDecimal(double value) {
+			this.value = value;
+		}
+	}
+
+	@Converter(autoApply = true)
+	static class MyBigDecimalConverter implements AttributeConverter<MyBigDecimal, BigDecimal> {
+		@Override
+		public BigDecimal convertToDatabaseColumn(MyBigDecimal attribute) {
+			return BigDecimal.valueOf( attribute.value );
+		}
+
+		@Override
+		public MyBigDecimal convertToEntityAttribute(BigDecimal dbData) {
+			return new MyBigDecimal( dbData.doubleValue() );
+		}
+
+		public MyBigDecimalConverter() {
+			System.out.println( "Registered MyBigDecimalConverter" );
+		}
+	}
+
+}