/*

 * Copyright (c) 2000, 2020, 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

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package sun.nio.ch;

import java.io.IOException;

import java.net.ProtocolFamily;

import java.nio.channels.DatagramChannel;

import java.nio.channels.Pipe;

import java.nio.channels.ServerSocketChannel;

import java.nio.channels.SocketChannel;

import java.nio.channels.spi.AbstractSelector;

import java.nio.channels.spi.SelectorProvider;

import java.util.Objects;

import static java.net.StandardProtocolFamily.INET;

import static java.net.StandardProtocolFamily.INET6;

import static java.net.StandardProtocolFamily.UNIX;

public abstract class SelectorProviderImpl

    extends SelectorProvider

{

    @Override

    public DatagramChannel openDatagramChannel() throws IOException {

        return new DatagramChannelImpl(this, /*interruptible*/true);

    }

    /**

     * SelectorProviderImpl specific method to create a DatagramChannel that

     * is not interruptible.

     */

    public DatagramChannel openUninterruptibleDatagramChannel() throws IOException {

        return new DatagramChannelImpl(this, /*interruptible*/false);

    }

    @Override

    public DatagramChannel openDatagramChannel(ProtocolFamily family) throws IOException {

        return new DatagramChannelImpl(this, family, /*interruptible*/true);

    }

    @Override

    public Pipe openPipe() throws IOException {

        return new PipeImpl(this);

    }

    @Override

    public abstract AbstractSelector openSelector() throws IOException;

    @Override

    public ServerSocketChannel openServerSocketChannel() throws IOException {

        return new ServerSocketChannelImpl(this);

    }

    @Override

    public SocketChannel openSocketChannel() throws IOException {

        return new SocketChannelImpl(this);

    }

    @Override

    public SocketChannel openSocketChannel(ProtocolFamily family) throws IOException {

        Objects.requireNonNull(family, "'family' is null");

        if (family == INET6 && !Net.isIPv6Available()) {

            throw new UnsupportedOperationException("IPv6 not available");

        } else if (family == INET || family == INET6) {

            return new SocketChannelImpl(this, family);

        } else if (family == UNIX && UnixDomainSockets.isSupported()) {

            return new SocketChannelImpl(this, family);

        } else {

            throw new UnsupportedOperationException("Protocol family not supported");

        }

    }

    @Override

    public ServerSocketChannel openServerSocketChannel(ProtocolFamily family) throws IOException {

        Objects.requireNonNull(family, "'family' is null");

        if (family == INET6 && !Net.isIPv6Available()) {

            throw new UnsupportedOperationException("IPv6 not available");

        } else if (family == INET || family == INET6)  {

            return new ServerSocketChannelImpl(this, family);

        } else if (family == UNIX && UnixDomainSockets.isSupported()) {

            return new ServerSocketChannelImpl(this, family);

        } else {

            throw new UnsupportedOperationException("Protocol family not supported");

        }

    }

}