net.awairo.mcmod.spawnchecker.client.common.Refrection.java Source code

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Here is the source code for net.awairo.mcmod.spawnchecker.client.common.Refrection.java

Source

/*
 * SpawnChecker.
 * 
 * (c) 2014 alalwww
 * https://github.com/alalwww
 * 
 * This mod is distributed under the terms of the Minecraft Mod Public License 1.0, or MMPL.
 * Please check the contents of the license located in http://www.mod-buildcraft.com/MMPL-1.0.txt
 * 
 * ?? MOD ??Minecraft Mod Public License (MMPL) 1.0 ???????????
 * ??????????? http://www.mod-buildcraft.com/MMPL-1.0.txt
 */

package net.awairo.mcmod.spawnchecker.client.common;

import static com.google.common.base.Preconditions.*;

import java.net.InetSocketAddress;

import com.google.common.base.Optional;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import net.minecraft.client.Minecraft;
import net.minecraft.client.multiplayer.WorldClient;
import net.minecraft.client.network.NetHandlerPlayClient;
import net.minecraft.network.NetworkManager;

import cpw.mods.fml.relauncher.ReflectionHelper;

import net.awairo.mcmod.spawnchecker.SpawnChecker;

/**
 * ??.
 */
public final class Refrection {
    private static final Minecraft GAME = Minecraft.getMinecraft();
    private static final Logger LOGGER = LogManager.getLogger(SpawnChecker.MOD_ID);

    /**
     * ??????????.
     * 
     * @return ??.
     */
    public static Optional<InetSocketAddress> getServerAddress() {
        checkState(GAME.theWorld != null, "world is not started");
        checkState(GAME.getIntegratedServer() == null, "current mode is the single player.");

        final NetHandlerPlayClient sendQueue = getFieldValue(WorldClient.class, GAME.theWorld, "sendQueue",
                ConstantsConfig.instance().sendQueueSrgName);

        if (sendQueue == null)
            return Optional.absent();

        final NetworkManager netManager = sendQueue.getNetworkManager();

        if (netManager.getSocketAddress() instanceof InetSocketAddress)
            return Optional.fromNullable((InetSocketAddress) netManager.getSocketAddress());

        if (LOGGER.isDebugEnabled() && netManager.getSocketAddress() != null)
            LOGGER.debug(netManager.getSocketAddress().getClass().getName());

        LOGGER.warn("not found InetSocketAddress");

        return Optional.absent();
    }

    private static <T, E> T getFieldValue(Class<? super E> clazz, E instance, String... names) {
        try {
            return ReflectionHelper.getPrivateValue(clazz, instance, names);
        } catch (RuntimeException ignore) {
            LOGGER.warn("refrection failed.", ignore);
            return null;
        }
    }

    private Refrection() {
        throw new InternalError();
    }
}