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An API for creating unique plugins for Bahar servers.
There is a newer version: 0.6
/*
 * MIT License
 *
 * Copyright (c) 2020 BaharMC
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package io.github.baharmc;

import java.util.Optional;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

/**
 * {@link Bahar} is a back-end API.
 *
 * @since 0.1
 */
public final class Bahar {

    /**
     * The instance of the {@link Server}.
     */
    @Nullable
    private static Server server;

    /**
     * Private ctor.
     */
    private Bahar() {
    }

    /**
     * Gives instance of the {@link Server}.
     * @return The {@link Server}
     */
    @NotNull
    @SuppressWarnings("PMD.ProhibitPublicStaticMethods")
    public static Server getServer() {
        return Optional.ofNullable(Bahar.server).orElseThrow(
            () -> new IllegalAccessError(
                "You can't use #getServer() method before server start!"
            )
        );
    }

    /**
     * Sets instance of the server.
     * @param srv The server
     * @throws IllegalStateException if {@link #server} is already set.
     */
    @SuppressWarnings("PMD.ProhibitPublicStaticMethods")
    public static void setServer(@NotNull final Server srv) {
        final Optional optional = Optional.ofNullable(Bahar.server);
        if (optional.isPresent()) {
            throw new IllegalStateException(
                "You can't use #setServer(Server) method after server start!"
            );
        }
        Bahar.server = srv;
    }

}