AbstractPacket.java

/*
 *  PacketWrapper - Contains wrappers for each packet in Minecraft.
 *  Copyright (C) 2012 Kristian S. Stangeland
 *
 *  This program is free software; you can redistribute it and/or modify it under the terms of the
 *  GNU Lesser General Public License as published by the Free Software Foundation; either version 2 of
 *  the License, or (at your option) any later version.
 *
 *  This program 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 this program;
 *  if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
 *  02111-1307 USA
 */

package org.royaldev.royalcommands.protocol.packets;

import com.comphenix.protocol.PacketType;
import com.comphenix.protocol.ProtocolLibrary;
import com.comphenix.protocol.events.PacketContainer;
import com.google.common.base.Objects;
import org.bukkit.entity.Player;

import java.lang.reflect.InvocationTargetException;

public abstract class AbstractPacket {

    // The packet we will be modifying
    protected PacketContainer handle;

    /**
     * Constructs a new strongly typed wrapper for the given packet.
     *
     * @param handle - handle to the raw packet data.
     * @param type   - the packet type.
     */
    protected AbstractPacket(PacketContainer handle, PacketType type) {
        // Make sure we're given a valid packet
        if (handle == null) throw new IllegalArgumentException("Packet handle cannot be NULL.");
        if (!Objects.equal(handle.getType(), type)) {
            throw new IllegalArgumentException(handle.getHandle() + " is not a packet of type " + type);
        }
        this.handle = handle;
    }

    /**
     * Retrieve a handle to the raw packet data.
     *
     * @return Raw packet data.
     */
    public PacketContainer getHandle() {
        return handle;
    }

    /**
     * Simulate receiving the current packet from the given sender.
     *
     * @param sender - the sender.
     * @throws RuntimeException If the packet cannot be received.
     */
    public void recievePacket(Player sender) {
        try {
            ProtocolLibrary.getProtocolManager().recieveClientPacket(sender, getHandle());
        } catch (Exception e) {
            throw new RuntimeException("Cannot recieve packet.", e);
        }
    }

    /**
     * Send the current packet to the given receiver.
     *
     * @param receiver - the receiver.
     * @throws RuntimeException If the packet cannot be sent.
     */
    public void sendPacket(Player receiver) {
        try {
            ProtocolLibrary.getProtocolManager().sendServerPacket(receiver, getHandle());
        } catch (InvocationTargetException e) {
            throw new RuntimeException("Cannot send packet.", e);
        }
    }
}