001/*
002 * SPDX-License-Identifier: Apache-2.0
003 *
004 * Copyright 2024-2026 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.convert;
019
020import java.util.Optional;
021
022/**
023 * A "chain" of {@link OptionalConverter}s. It attempts the conversion in order until one is
024 * successful.
025 */
026public class OptionalConverterChain<I, O> implements OptionalConverter<I, O> {
027
028    private final Iterable<OptionalConverter<I, O>> converters;
029
030    public OptionalConverterChain(Iterable<OptionalConverter<I, O>> converters) {
031        this.converters = converters;
032    }
033
034    @Override
035    public Optional<O> convert(I input) throws ConversionException {
036        for (var converter : converters) {
037            var opt = converter.convert(input);
038            if (opt.isPresent()) return opt;
039        }
040        return Optional.empty();
041    }
042}