nova.core.network.handler.BlockPacket.java Source code

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Here is the source code for nova.core.network.handler.BlockPacket.java

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/*
 * Copyright (c) 2015 NOVA, All rights reserved.
 * This library is free software, licensed under GNU Lesser General Public License version 3
 *
 * This file is part of NOVA.
 *
 * NOVA is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * NOVA 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with NOVA.  If not, see <http://www.gnu.org/licenses/>.
 */package nova.core.network.handler;

import nova.core.block.Block;
import nova.core.entity.Entity;
import nova.core.network.NetworkException;
import nova.core.network.Packet;
import nova.core.network.Syncable;
import org.apache.commons.math3.geometry.euclidean.threed.Vector3D;

import java.util.Optional;

/**
 * Handles block packets
 *
 * Packet Structure:
 * 1. PosX
 * 2. PosY
 * 3. PosZ
 * 5. Data
 *
 * @author Calclavia
 */
public class BlockPacket implements PacketHandler<Block> {

    @Override
    public void read(Packet packet) {
        Entity entity = packet.player().entity();
        Vector3D position = new Vector3D(packet.readInt(), packet.readInt(), packet.readInt());

        Optional<Block> opBlock = entity.world().getBlock(position);

        if (opBlock.isPresent()) {
            Block block = opBlock.get();
            if (block instanceof Syncable) {
                ((Syncable) block).read(packet);
                return;
            }
        }
        throw new NetworkException("Failed to receive packet to block at " + position);
    }

    @Override
    public void write(Block block, Packet packet) {
        if (block instanceof Syncable) {
            Vector3D position = block.position();
            packet.writeInt((int) position.getX());
            packet.writeInt((int) position.getY());
            packet.writeInt((int) position.getZ());
            ((Syncable) block).write(packet);
            return;
        }

        throw new NetworkException("Failed to send packet for block: " + block);
    }

    @Override
    public boolean isHandlerFor(Object block) {
        return block instanceof Block;
    }
}