/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Neo4j is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.neo4j.function;

import org.neo4j.internal.helpers.Exceptions;

/**
 * An action that takes no parameters and returns no values, but may have a side-effect and may throw an exception.
 *
 * @param <E> The type of exception this action may throw.
 */
public interface ThrowingAction<E extends Exception> {
    /**
     * Apply the action for some or all of its side-effects to take place, possibly throwing an exception.
     *
     * @throws E the exception that performing this action may throw.
     */
    void apply() throws E;

    static <E extends Exception> ThrowingAction<E> noop() {
        return () -> {};
    }

    static void executeAll(ThrowingAction<?>... actions) throws Exception {
        Exception error = null;
        for (final ThrowingAction<?> action : actions) {
            try {
                action.apply();
            } catch (Exception e) {
                error = Exceptions.chain(error, e);
            }
        }
        if (error != null) {
            throw error;
        }
    }
}
