2 * Copyright (c) 2021 PANTHEON.tech, s.r.o. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.yangtools.yang.model.api.stmt;
10 import java.util.Optional;
11 import org.eclipse.jdt.annotation.NonNull;
14 * Simple helper methods used in default implementations.
16 final class DefaultMethodHelpers {
17 private DefaultMethodHelpers() {
21 static <E> @NonNull Optional<E> filterOptional(final @NonNull Class<E> type, final @NonNull Optional<?> optional) {
22 return optional.filter(type::isInstance).map(type::cast);