net.dreamlu.iot.mqtt.codec.ReasonCodeUtils Maven / Gradle / Ivy
/*
* Copyright 2021 The vertx Project
*
* The Netty Project licenses this file to you under the Apache License,
* version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at:
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package net.dreamlu.iot.mqtt.codec;
/**
* Utilities for MQTT message codes enums
*
* @author vertx-mqtt
*/
public class ReasonCodeUtils {
protected static void fillValuesByCode(C[] valuesByCode, C[] values) {
for (C code : values) {
final int unsignedByte = code.value() & 0xFF;
valuesByCode[unsignedByte] = code;
}
}
protected static C codeLoopUp(C[] valuesByCode, byte b, String codeType) {
final int unsignedByte = b & 0xFF;
C reasonCode = null;
try {
reasonCode = valuesByCode[unsignedByte];
} catch (ArrayIndexOutOfBoundsException ignored) {
// no op
}
if (reasonCode == null) {
throw new IllegalArgumentException("unknown " + codeType + " reason code: " + unsignedByte);
}
return reasonCode;
}
}