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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * 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:
 *
 *   http://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 io.netty.util.internal.UnstableApi;

import static io.netty.util.internal.ObjectUtil.checkNotNull;

/**
 * The DNS {@code OpCode} as defined in RFC2929.
 */
@UnstableApi
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;
        }

        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;
    }
}