001/*
002 * SPDX-License-Identifier: Apache-2.0
003 *
004 * Copyright 2025-2026 The Enola <https://enola.dev> Authors
005 *
006 * Licensed under the Apache License, Version 2.0 (the "License");
007 * you may not use this file except in compliance with the License.
008 * You may obtain a copy of the License at
009 *
010 *     https://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package dev.enola.common.function;
019
020import static java.util.Collections.emptyIterator;
021
022import java.io.Closeable;
023import java.io.IOException;
024import java.util.Iterator;
025
026public interface CloseableIterable<T> extends Iterable<T>, Closeable {
027
028    @Override
029    public void close() throws IOException;
030
031    public static <T> CloseableIterable<T> wrap(Iterable<T> iterable, Closeable closeable) {
032        return new CloseableIterable<T>() {
033            @Override
034            public Iterator<T> iterator() {
035                return iterable.iterator();
036            }
037
038            @Override
039            public void close() throws IOException {
040                closeable.close();
041            }
042        };
043    }
044
045    public static <T> CloseableIterable<T> empty() {
046        return new CloseableIterable<T>() {
047            @Override
048            public Iterator<T> iterator() {
049                return emptyIterator();
050            }
051
052            @Override
053            public void close() {}
054        };
055    }
056}