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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 2020 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.util;

import com.oracle.svm.core.annotate.Alias;
import com.oracle.svm.core.annotate.InjectAccessors;
import com.oracle.svm.core.annotate.TargetClass;

import java.net.Inet4Address;
import java.net.Inet6Address;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.util.Collection;

@TargetClass(NetUtil.class)
final class NetUtilSubstitutions {
    private NetUtilSubstitutions() {
    }

    @Alias
    @InjectAccessors(NetUtilLocalhost4Accessor.class)
    public static Inet4Address LOCALHOST4;

    @Alias
    @InjectAccessors(NetUtilLocalhost6Accessor.class)
    public static Inet6Address LOCALHOST6;

    @Alias
    @InjectAccessors(NetUtilLocalhostAccessor.class)
    public static InetAddress LOCALHOST;

    @Alias
    @InjectAccessors(NetUtilNetworkInterfacesAccessor.class)
    public static Collection NETWORK_INTERFACES;

    private static final class NetUtilLocalhost4Accessor {
        static Inet4Address get() {
            // using https://en.wikipedia.org/wiki/Initialization-on-demand_holder_idiom
            return NetUtilLocalhost4LazyHolder.LOCALHOST4;
        }

        static void set(Inet4Address ignored) {
            // a no-op setter to avoid exceptions when NetUtil is initialized at run-time
        }
    }

    private static final class NetUtilLocalhost4LazyHolder {
        private static final Inet4Address LOCALHOST4 = NetUtilInitializations.createLocalhost4();
    }

    private static final class NetUtilLocalhost6Accessor {
        static Inet6Address get() {
            // using https://en.wikipedia.org/wiki/Initialization-on-demand_holder_idiom
            return NetUtilLocalhost6LazyHolder.LOCALHOST6;
        }

        static void set(Inet6Address ignored) {
            // a no-op setter to avoid exceptions when NetUtil is initialized at run-time
        }
    }

    private static final class NetUtilLocalhost6LazyHolder {
        private static final Inet6Address LOCALHOST6 = NetUtilInitializations.createLocalhost6();
    }

    private static final class NetUtilLocalhostAccessor {
        static InetAddress get() {
            // using https://en.wikipedia.org/wiki/Initialization-on-demand_holder_idiom
            return NetUtilLocalhostLazyHolder.LOCALHOST;
        }

        static void set(InetAddress ignored) {
            // a no-op setter to avoid exceptions when NetUtil is initialized at run-time
        }
    }

    private static final class NetUtilLocalhostLazyHolder {
        private static final InetAddress LOCALHOST = NetUtilInitializations
                .determineLoopback(NetUtilNetworkInterfacesLazyHolder.NETWORK_INTERFACES,
                        NetUtilLocalhost4LazyHolder.LOCALHOST4, NetUtilLocalhost6LazyHolder.LOCALHOST6)
                .address();
    }

    private static final class NetUtilNetworkInterfacesAccessor {
        static Collection get() {
            // using https://en.wikipedia.org/wiki/Initialization-on-demand_holder_idiom
            return NetUtilNetworkInterfacesLazyHolder.NETWORK_INTERFACES;
        }

        static void set(Collection ignored) {
            // a no-op setter to avoid exceptions when NetUtil is initialized at run-time
        }
    }

    private static final class NetUtilNetworkInterfacesLazyHolder {
        private static final Collection NETWORK_INTERFACES =
                NetUtilInitializations.networkInterfaces();
    }
}