net.dreamlu.iot.mqtt.codec.MqttSubscriptionOption Maven / Gradle / Ivy
/*
* Copyright 2020 The Netty 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;
/**
* Model the SubscriptionOption used in Subscribe MQTT v5 packet
*
* @author netty
*/
public final class MqttSubscriptionOption {
/**
* 保留处理政策
*/
public enum RetainedHandlingPolicy {
/**
* 订阅发送
*/
SEND_AT_SUBSCRIBE((byte) 0),
/**
* 如果还没有订阅，请发送
*/
SEND_AT_SUBSCRIBE_IF_NOT_YET_EXISTS((byte) 1),
/**
* 请勿发送订阅
*/
DONT_SEND_AT_SUBSCRIBE((byte) 2);
private final byte value;
RetainedHandlingPolicy(byte value) {
this.value = value;
}
public byte value() {
return value;
}
public static RetainedHandlingPolicy valueOf(int value) {
switch (value) {
case 0:
return SEND_AT_SUBSCRIBE;
case 1:
return SEND_AT_SUBSCRIBE_IF_NOT_YET_EXISTS;
case 2:
return DONT_SEND_AT_SUBSCRIBE;
default:
throw new IllegalArgumentException("invalid RetainedHandlingPolicy: " + value);
}
}
}
private final MqttQoS qos;
private final boolean noLocal;
private final boolean retainAsPublished;
private final RetainedHandlingPolicy retainHandling;
public static MqttSubscriptionOption onlyFromQos(MqttQoS qos) {
return new MqttSubscriptionOption(qos, false, false, RetainedHandlingPolicy.SEND_AT_SUBSCRIBE);
}
public MqttSubscriptionOption(MqttQoS qos,
boolean noLocal,
boolean retainAsPublished,
RetainedHandlingPolicy retainHandling) {
this.qos = qos;
this.noLocal = noLocal;
this.retainAsPublished = retainAsPublished;
this.retainHandling = retainHandling;
}
public MqttQoS qos() {
return qos;
}
public boolean isNoLocal() {
return noLocal;
}
public boolean isRetainAsPublished() {
return retainAsPublished;
}
public RetainedHandlingPolicy retainHandling() {
return retainHandling;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
MqttSubscriptionOption that = (MqttSubscriptionOption) o;
if (noLocal != that.noLocal) {
return false;
}
if (retainAsPublished != that.retainAsPublished) {
return false;
}
if (qos != that.qos) {
return false;
}
return retainHandling == that.retainHandling;
}
@Override
public int hashCode() {
int result = qos.hashCode();
result = 31 * result + (noLocal ? 1 : 0);
result = 31 * result + (retainAsPublished ? 1 : 0);
result = 31 * result + retainHandling.hashCode();
return result;
}
@Override
public String toString() {
return "SubscriptionOption[" +
"qos=" + qos +
", noLocal=" + noLocal +
", retainAsPublished=" + retainAsPublished +
", retainHandling=" + retainHandling +
']';
}
}