HHH-18322 Fix : when exact constructor is not found, try finding matching one

Author: cigaly

hibernate-core/src/main/java/org/hibernate/sql/results/internal/RowTransformerConstructorImpl.java

@@ -9,11 +9,14 @@
 import org.hibernate.sql.results.spi.RowTransformer;
 
 import java.lang.reflect.Constructor;
+import java.util.Arrays;
 import java.util.List;
 
 import org.hibernate.query.sqm.SqmExpressible;
 import org.hibernate.query.sqm.tree.SqmExpressibleAccessor;
 
+import static org.hibernate.query.sqm.tree.expression.Compatibility.areAssignmentCompatible;
+
 /**
  * {@link RowTransformer} instantiating an arbitrary class
  *
@@ -31,7 +34,7 @@ public RowTransformerConstructorImpl(Class<T> type, TupleMetadata tupleMetadata)
 			sig[i] = resolveElementJavaType( elements.get( i ) );
 		}
 		try {
-			constructor = type.getDeclaredConstructor( sig );
+			constructor = findMatchingConstructor( type, sig );
 			constructor.setAccessible( true );
 		}
 		catch (Exception e) {
@@ -51,6 +54,38 @@ private static Class<?> resolveElementJavaType(TupleElement<?> element) {
 		return element.getJavaType();
 	}
 
+	private Constructor<T> findMatchingConstructor(
+			Class<T> type,
+			Class<?>[] sig) throws NoSuchMethodException {
+		try {
+			return type.getDeclaredConstructor( sig );
+		}
+		catch (NoSuchMethodException | SecurityException e) {
+			constructor_loop:
+			for ( final Constructor<?> constructor : type.getDeclaredConstructors() ) {
+				final Class<?>[] parameterTypes = constructor.getParameterTypes();
+				if ( parameterTypes.length == sig.length ) {
+					for ( int i = 0; i < sig.length; i++ ) {
+						final Class<?> parameterType = parameterTypes[i];
+						final Class<?> argType = sig[i];
+						final boolean assignmentCompatible;
+						assignmentCompatible =
+								argType == null && !parameterType.isPrimitive()
+								|| areAssignmentCompatible(
+										parameterType,
+										argType
+								);
+						if ( !assignmentCompatible ) {
+							continue constructor_loop;
+						}
+					}
+					return (Constructor<T>) constructor;
+				}
+			}
+			throw new NoSuchMethodException();
+		}
+	}
+
 	@Override
 	public T transformRow(Object[] row) {
 		try {