growthcraft.core.common.tileentity.GrcBaseTile.java Source code

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Here is the source code for growthcraft.core.common.tileentity.GrcBaseTile.java

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/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 IceDragon200
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package growthcraft.core.common.tileentity;

import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.EnumMap;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.annotation.Nonnull;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;

import growthcraft.core.common.tileentity.event.EventHandler;
import growthcraft.core.common.tileentity.event.EventFunction;

import net.minecraft.tileentity.TileEntity;
import net.minecraft.network.NetworkManager;
import net.minecraft.network.Packet;
import net.minecraft.network.play.server.S35PacketUpdateTileEntity;
import net.minecraft.nbt.NBTTagCompound;

/*
 * Event handling system is a stripped version of the one seen in AE2, I've
 * copied the code for use in YATM, but I've ported it over to Growthcraft as
 * well.
 */
public abstract class GrcBaseTile extends TileEntity {
    protected static class HandlerMap extends EnumMap<EventHandler.EventType, List<EventFunction>> {
        public static final long serialVersionUID = 1L;

        public HandlerMap() {
            super(EventHandler.EventType.class);
        }
    }

    protected static Map<Class<? extends GrcBaseTile>, HandlerMap> HANDLERS = new HashMap<Class<? extends GrcBaseTile>, HandlerMap>();

    protected boolean needBlockUpdate = true;

    public void markForBlockUpdate() {
        needBlockUpdate = true;
    }

    public void markForUpdate() {
        worldObj.markBlockForUpdate(xCoord, yCoord, zCoord);
    }

    protected void preMarkForUpdate() {

    }

    @Override
    public void updateEntity() {
        if (needBlockUpdate) {
            needBlockUpdate = false;
            preMarkForUpdate();
            markForUpdate();
        }

        super.updateEntity();
    }

    protected void addHandler(@Nonnull HandlerMap handlerMap, @Nonnull EventHandler.EventType type,
            @Nonnull Method method) {
        if (!handlerMap.containsKey(type)) {
            handlerMap.put(type, new ArrayList<EventFunction>());
        }
        handlerMap.get(type).add(new EventFunction(method));
    }

    @SuppressWarnings({ "unchecked", "rawtypes" })
    @Nonnull
    protected HandlerMap getHandlersMap() {
        final Class klass = getClass();
        HandlerMap cached = HANDLERS.get(klass);
        if (cached == null) {
            cached = new HandlerMap();
            HANDLERS.put(klass, cached);
            for (Method method : klass.getMethods()) {
                final EventHandler anno = method.getAnnotation(EventHandler.class);
                if (anno != null)
                    addHandler(cached, anno.type(), method);
            }
        }
        return cached;
    }

    protected List<EventFunction> getHandlersFor(@Nonnull EventHandler.EventType type) {
        return getHandlersMap().get(type);
    }

    protected void writeToStream(ByteBuf stream) {
        final List<EventFunction> handlers = getHandlersFor(EventHandler.EventType.NETWORK_WRITE);
        if (handlers != null) {
            for (EventFunction func : handlers) {
                func.writeToStream(this, stream);
            }
        }
    }

    @Override
    public Packet getDescriptionPacket() {
        final NBTTagCompound data = new NBTTagCompound();
        final ByteBuf stream = Unpooled.buffer();

        try {
            writeToStream(stream);
            if (stream.readableBytes() == 0) {
                return null;
            }
        } catch (Throwable t) {
            System.err.println(t);
        }

        // P, for payload
        data.setByteArray("P", stream.array());

        return new S35PacketUpdateTileEntity(xCoord, yCoord, zCoord, 127, data);
    }

    protected boolean readFromStream(ByteBuf stream) {
        boolean shouldUpdate = false;
        final List<EventFunction> handlers = getHandlersFor(EventHandler.EventType.NETWORK_READ);
        if (handlers != null) {
            for (EventFunction func : handlers) {
                if (func.readFromStream(this, stream)) {
                    shouldUpdate = true;
                }
            }
        }
        return shouldUpdate;
    }

    @Override
    public void onDataPacket(NetworkManager net, S35PacketUpdateTileEntity packet) {
        if (packet.func_148853_f() == 127) {
            final NBTTagCompound tag = packet.func_148857_g();
            if (tag != null) {
                final ByteBuf stream = Unpooled.copiedBuffer(tag.getByteArray("P"));
                if (readFromStream(stream)) {
                    markForUpdate();
                }
            }
        }
    }
}