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Add debug helper class for ProtocolLib
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/*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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package com.gmail.filoghost.holographicdisplays.bridge.protocollib.current;
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import java.util.Map;
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import com.comphenix.net.sf.cglib.proxy.Factory;
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import com.comphenix.protocol.events.PacketContainer;
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import com.comphenix.protocol.events.PacketEvent;
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import com.comphenix.protocol.reflect.EquivalentConverter;
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import com.comphenix.protocol.reflect.PrettyPrinter;
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import com.comphenix.protocol.reflect.PrettyPrinter.ObjectPrinter;
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import com.comphenix.protocol.utility.HexDumper;
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import com.comphenix.protocol.utility.MinecraftReflection;
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import com.comphenix.protocol.wrappers.BukkitConverters;
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public class DebugHelper {
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private static final int HEX_DUMP_THRESHOLD = 256;
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public static void printInformation(PacketEvent event) {
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String verb = event.isServerPacket() ? "Sent" : "Received";
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String format = event.isServerPacket() ?
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"%s %s to %s" :
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"%s %s from %s";
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String shortDescription = String.format(format,
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event.isCancelled() ? "Cancelled" : verb,
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event.getPacketType(),
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event.getPlayer().getName()
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);
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// Detailed will print the packet's content too
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try {
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System.out.println(shortDescription + ":\n" + getPacketDescription(event.getPacket()));
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} catch (IllegalAccessException e) {
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e.printStackTrace();
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System.out.println("Unable to use reflection.");
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}
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}
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private static String getPacketDescription(PacketContainer packetContainer) throws IllegalAccessException {
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Object packet = packetContainer.getHandle();
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Class<?> clazz = packet.getClass();
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// Get the first Minecraft super class
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while (clazz != null && clazz != Object.class &&
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(!MinecraftReflection.isMinecraftClass(clazz) ||
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Factory.class.isAssignableFrom(clazz))) {
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clazz = clazz.getSuperclass();
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}
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return PrettyPrinter.printObject(packet, clazz, MinecraftReflection.getPacketClass(), PrettyPrinter.RECURSE_DEPTH, new ObjectPrinter() {
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@Override
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public boolean print(StringBuilder output, Object value) {
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// Special case
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if (value instanceof byte[]) {
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byte[] data = (byte[]) value;
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if (data.length > HEX_DUMP_THRESHOLD) {
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output.append("[");
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HexDumper.defaultDumper().appendTo(output, data);
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output.append("]");
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return true;
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}
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} else if (value != null) {
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EquivalentConverter<Object> converter = findConverter(value.getClass());
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if (converter != null) {
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output.append(converter.getSpecific(value));
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return true;
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}
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}
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return false;
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}
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});
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}
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private static EquivalentConverter<Object> findConverter(Class<?> clazz) {
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Map<Class<?>, EquivalentConverter<Object>> converters = BukkitConverters.getConvertersForGeneric();
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while (clazz != null) {
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EquivalentConverter<Object> result = converters.get(clazz);
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if (result != null)
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return result;
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else
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clazz = clazz.getSuperclass();
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}
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return null;
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}
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}
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