Fix cast exception when unwrapping ArrayTypeDescrptor which component type is an Annotationusage

Author: dreab8

src/main/java/org/hibernate/models/internal/ArrayTypeDescriptor.java

@@ -7,6 +7,7 @@
 package org.hibernate.models.internal;
 
 import java.lang.annotation.Annotation;
+import java.lang.reflect.Array;
 import java.util.Collections;
 import java.util.List;
 
@@ -32,15 +33,17 @@
  */
 public class ArrayTypeDescriptor<V> implements ValueTypeDescriptor<List<V>> {
 	private final ValueTypeDescriptor<V> elementTypeDescriptor;
+	private final Class<?> componentType;
 
 	private ValueWrapper<List<V>, AnnotationValue> jandexValueWrapper;
 	private ValueExtractor<AnnotationInstance,List<V>> jandexValueExtractor;
 
 	private ValueWrapper<List<V>,Object[]> jdkValueWrapper;
 	private ValueExtractor<Annotation,List<V>> jdkValueExtractor;
 
-	public ArrayTypeDescriptor(ValueTypeDescriptor<V> elementTypeDescriptor) {
+	public ArrayTypeDescriptor(ValueTypeDescriptor<V> elementTypeDescriptor, Class<?> componentType) {
 		this.elementTypeDescriptor = elementTypeDescriptor;
+		this.componentType = componentType;
 	}
 
 	@Override
@@ -123,9 +126,9 @@ public ValueWrapper<List<V>,Object[]> resolveJkWrapper(SourceModelBuildingContex
 
 	@Override
 	public Object unwrap(List<V> value) {
-		final Object[] result = new Object[value.size()];
+		final Object[] result = (Object[]) Array.newInstance( componentType, value.size() );
 		for ( int i = 0; i < value.size(); i++ ) {
-			result[i] = elementTypeDescriptor.unwrap( value.get(i) );
+			result[i] = elementTypeDescriptor.unwrap( value.get( i ) );
 		}
 		return result;
 	}

src/main/java/org/hibernate/models/internal/TypeDescriptors.java

@@ -74,7 +74,7 @@ public static <T,W> ValueTypeDescriptor<W> resolveTypeDescriptor(Class<T> attrib
 		if ( attributeType.isArray() ) {
 			final Class<?> componentType = attributeType.getComponentType();
 			final ValueTypeDescriptor<?> elementTypeDescriptor = resolveTypeDescriptor( componentType );
-			return (ValueTypeDescriptor<W>) new ArrayTypeDescriptor<>( elementTypeDescriptor );
+			return (ValueTypeDescriptor<W>) new ArrayTypeDescriptor<>( elementTypeDescriptor, componentType );
 		}
 
 		if ( attributeType.isEnum() ) {

src/test/java/org/hibernate/models/dynamic/ToAnnotationTest.java

@@ -0,0 +1,30 @@
+package org.hibernate.models.dynamic;
+
+import org.hibernate.models.internal.SourceModelBuildingContextImpl;
+import org.hibernate.models.internal.dynamic.DynamicAnnotationUsage;
+import org.hibernate.models.internal.dynamic.DynamicClassDetails;
+import org.hibernate.models.orm.JpaAnnotations;
+
+import org.junit.jupiter.api.Test;
+
+import jakarta.persistence.JoinTable;
+
+import static org.hibernate.models.SourceModelTestHelper.createBuildingContext;
+
+public class ToAnnotationTest {
+
+	@Test
+	void testAccessArrayOfAnnotations() {
+		final SourceModelBuildingContextImpl buildingContext = createBuildingContext();
+		final DynamicClassDetails dynamicEntity = new DynamicClassDetails( "DynamicEntity", buildingContext );
+		final DynamicAnnotationUsage<JoinTable> generatorAnn = new DynamicAnnotationUsage<>(
+				JpaAnnotations.JOIN_TABLE,
+				dynamicEntity,
+				buildingContext
+		);
+
+		JoinTable joinTableAnn = generatorAnn.toAnnotation();
+
+		joinTableAnn.indexes();
+	}
+}