/*

 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

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 */

package jdk.incubator.http;

import java.util.Optional;

import java.util.concurrent.CompletionException;

import java.util.concurrent.Flow;

import java.util.function.Consumer;

/**

 * A super class for PushPublisher implementation.

 */

abstract class AbstractPushPublisher<T> implements Flow.Publisher<T> {

    static enum SubscriptionState { OPENED, DONE, CANCELLED };

    public abstract void acceptData(Optional<T> item)

        throws InterruptedException;

    public abstract void acceptError(Throwable t);

    public Consumer<Optional<T>> asDataConsumer() {

        return this::consume;

    }

    void consume(Optional<T> item) {

        try {

            acceptData(item);

        } catch (InterruptedException x) {

            throw new CompletionException(x);

        }

    }

}