    001// Licensed to the Apache License, Version 2.0 (the "License");
    002// you may not use this file except in compliance with the License.
    003// You may obtain a copy of the License at
    004//
    005//     http://www.apache.org/licenses/LICENSE-2.0
    006//
    007// Unless required by applicable law or agreed to in writing, software
    008// distributed under the License is distributed on an "AS IS" BASIS,
    009// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    010// See the License for the specific language governing permissions and
    011// limitations under the License.
    012
    013package org.apache.tapestry5.commons;
    014
    015import java.util.List;
    016
    017/**
    018 * <p>
    019 * Interface that represents a parent-children relationship. It's used
    020 * in the Tapestry's <code>Recursive</code> component.
    021 * </p>
    022 * <p>
    023 * This was contributed by <a href="https://www.pubfactory.com">KGL PubFactory</a>.
    024 * </p>
    025 * @since 5.9.0
    026 */
    027public interface RecursiveValue<T>
    028{
    029
    030    /**
    031     * Returns the list of children for a given value.
    032     * @return a {@link java.util.List}.
    033     */
    034    List<RecursiveValue<?>> getChildren();
    035
    036    /**
    037     * Returns the original object related to this value.
    038     * @return an {@link Object}
    039     */
    040    T getValue();
    041
    042}