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A collection of useful Java extensions

There is a newer version: 2.3.1

/*
 * Copyright (c) 2020 the original author or authors.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/.
 */

package science.aist.jack.general.transformer;

import java.util.Collection;
import java.util.stream.Collectors;

/**
 * Generic interface for a bidirectional Transformer between a domain class and a TO class or collections of those classes
 *
 * @param  Item to be transferred to TO
 * @param    TO to be transferred to Item
 * @author Oliver Krauss
 * @author Christoph Praschl
 * @since 2.0
 */
@SuppressWarnings("java:S119") // Naming of type arguments
public interface Transformer extends ForwardTransformer, BackwardTransformer,
        ForwardCollectionTransformer, BackwardCollectionTransformer {
    @Override
    default Collection transformToCollection(Collection c) {
        return c.stream().map(this::transformTo).collect(Collectors.toList());
    }

    @Override
    default Collection transformFromCollection(Collection f) {
        return f.stream().map(this::transformFrom).collect(Collectors.toList());
    }
}