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This library contains the smallest set of supporting building blocks needed for other Essentials libraries, such as: Tuples, Collections, Functional Interfaces, FailFast, SLF4J compatible Message formatter, High level Reflection API

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/*
 * Copyright 2021-2024 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package dk.cloudcreate.essentials.shared.reflection;


import dk.cloudcreate.essentials.shared.FailFast;

import java.util.*;

/**
 * Utility class for working with {@link Interfaces}'s
 */
public final class Interfaces {
    /**
     * Returns a set of all interfaces implemented by type supplied

     *
     * @param type find all interfaces this type implements/extends
     * @return all interfaces implemented by the type
     */
    public static Set> interfaces(Class type) {
        FailFast.requireNonNull(type, "You must supply a type");
        var interfaces = new HashSet>();

        while (type != null) {
            for (var _interface : type.getInterfaces()) {
                interfaces.add(_interface);
                interfaces.addAll(interfaces(_interface));
            }
            type = type.getSuperclass();
        }

        return interfaces;
    }
}