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Easy Redis Java client and Real-Time Data Platform. Valkey compatible. Sync/Async/RxJava3/Reactive API. Client side caching. Over 50 Redis based Java objects and services: JCache API, Apache Tomcat, Hibernate, Spring, Set, Multimap, SortedSet, Map, List, Queue, Deque, Semaphore, Lock, AtomicLong, Map Reduce, Bloom filter, Scheduler, RPC
/*
* Copyright 2015 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 io.netty.handler.codec.dns;
import static io.netty.util.internal.ObjectUtil.checkNotNull;
/**
* The DNS {@code OpCode} as defined in RFC2929.
*/
public class DnsOpCode implements Comparable {
/**
* The 'Query' DNS OpCode, as defined in RFC1035.
*/
public static final DnsOpCode QUERY = new DnsOpCode(0x00, "QUERY");
/**
* The 'IQuery' DNS OpCode, as defined in RFC1035.
*/
public static final DnsOpCode IQUERY = new DnsOpCode(0x01, "IQUERY");
/**
* The 'Status' DNS OpCode, as defined in RFC1035.
*/
public static final DnsOpCode STATUS = new DnsOpCode(0x02, "STATUS");
/**
* The 'Notify' DNS OpCode, as defined in RFC1996.
*/
public static final DnsOpCode NOTIFY = new DnsOpCode(0x04, "NOTIFY");
/**
* The 'Update' DNS OpCode, as defined in RFC2136.
*/
public static final DnsOpCode UPDATE = new DnsOpCode(0x05, "UPDATE");
/**
* Returns the {@link DnsOpCode} instance of the specified byte value.
*/
public static DnsOpCode valueOf(int b) {
switch (b) {
case 0x00:
return QUERY;
case 0x01:
return IQUERY;
case 0x02:
return STATUS;
case 0x04:
return NOTIFY;
case 0x05:
return UPDATE;
default:
break;
}
return new DnsOpCode(b);
}
private final byte byteValue;
private final String name;
private String text;
private DnsOpCode(int byteValue) {
this(byteValue, "UNKNOWN");
}
public DnsOpCode(int byteValue, String name) {
this.byteValue = (byte) byteValue;
this.name = checkNotNull(name, "name");
}
public byte byteValue() {
return byteValue;
}
@Override
public int hashCode() {
return byteValue;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (!(obj instanceof DnsOpCode)) {
return false;
}
return byteValue == ((DnsOpCode) obj).byteValue;
}
@Override
public int compareTo(DnsOpCode o) {
return byteValue - o.byteValue;
}
@Override
public String toString() {
String text = this.text;
if (text == null) {
this.text = text = name + '(' + (byteValue & 0xFF) + ')';
}
return text;
}
}
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