001/*
002 * Trident - A Multithreaded Server Alternative
003 * Copyright 2014 The TridentSDK Team
004 *
005 * Licensed under the Apache License, Version 2.0 (the "License");
006 * you may not use this file except in compliance with the License.
007 * You may obtain a copy of the License at
008 *
009 *    http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018package net.tridentsdk.server.netty.packet;
019
020import io.netty.buffer.ByteBuf;
021import net.tridentsdk.server.netty.Codec;
022
023/**
024 * Wraps the raw Packet Data/Bytes received over the network (May serve more functions later)
025 *
026 * @author The TridentSDK Team
027 */
028public class PacketData {
029    private final ByteBuf rawData;
030    private Integer id;
031
032    /**
033     * Wraps the packet raw information
034     *
035     * @param data the serialized form of the packet
036     */
037    public PacketData(ByteBuf data) {
038        this.rawData = data;
039    }
040
041    /**
042     * Gets the Id of the packet. Reads it if it hasn't been read
043     *
044     * @return id the id of the packet
045     */
046    public int id() {
047        return this.id == null ? this.id = Codec.readVarInt32(this.data()) : this.id;
048    }
049
050    /**
051     * Gets the appropriate packet data
052     *
053     * @return the serialized packet
054     */
055    public ByteBuf data() {
056        return this.rawData;
057    }
058
059    /**
060     * The amount of bytes that can be read from the serialized packet
061     *
062     * @return the byte length of the serialized data
063     */
064    public int getLength() {
065        return this.data().readableBytes();
066    }
067}