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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * Copyright 2022 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package io.netty.channel.socket.nio;

import io.netty.channel.socket.InternetProtocolFamily;
import io.netty.util.internal.PlatformDependent;
import io.netty.util.internal.SuppressJava6Requirement;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;

import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.StandardProtocolFamily;
import java.nio.channels.Channel;
import java.nio.channels.SocketChannel;
import java.nio.channels.spi.SelectorProvider;

final class SelectorProviderUtil {
    private static final InternalLogger logger = InternalLoggerFactory.getInstance(SelectorProviderUtil.class);

    @SuppressJava6Requirement(reason = "Usage guarded by java version check")
    static Method findOpenMethod(String methodName) {
        if (PlatformDependent.javaVersion() >= 15) {
            try {
                return SelectorProvider.class.getMethod(methodName, java.net.ProtocolFamily.class);
            } catch (Throwable e) {
                logger.debug("SelectorProvider.{}(ProtocolFamily) not available, will use default", methodName, e);
            }
        }
        return null;
    }

    @SuppressJava6Requirement(reason = "Usage guarded by java version check")
    private static  C newChannel(Method method, SelectorProvider provider,
                                            Object family) throws IOException {
        /**
         *  Use the {@link SelectorProvider} to open {@link SocketChannel} and so remove condition in
         *  {@link SelectorProvider#provider()} which is called by each SocketChannel.open() otherwise.
         *
         *  See #2308.
         */
        if (family != null && method != null) {
            try {
                @SuppressWarnings("unchecked")
                C channel = (C) method.invoke(provider, family);
                return channel;
            } catch (InvocationTargetException e) {
                throw new IOException(e);
            } catch (IllegalAccessException e) {
                throw new IOException(e);
            }
        }
        return null;
    }

    @SuppressJava6Requirement(reason = "Usage guarded by java version check")
    static  C newChannel(Method method, SelectorProvider provider,
                                                    InternetProtocolFamily family) throws IOException {
        if (family != null) {
            return newChannel(method, provider, ProtocolFamilyConverter.convert(family));
        }
        return null;
    }

    @SuppressJava6Requirement(reason = "Usage guarded by java version check")
    static  C newDomainSocketChannel(Method method, SelectorProvider provider) throws IOException {
        return newChannel(method, provider, StandardProtocolFamily.valueOf("UNIX"));
    }

    private SelectorProviderUtil() { }
}