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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 RCODE}, as defined in RFC2929.
 */
@UnstableApi
public class DnsResponseCode implements Comparable {

    /**
     * The 'NoError' DNS RCODE (0), as defined in RFC1035.
     */
    public static final DnsResponseCode NOERROR = new DnsResponseCode(0, "NoError");

    /**
     * The 'FormErr' DNS RCODE (1), as defined in RFC1035.
     */
    public static final DnsResponseCode FORMERR = new DnsResponseCode(1, "FormErr");

    /**
     * The 'ServFail' DNS RCODE (2), as defined in RFC1035.
     */
    public static final DnsResponseCode SERVFAIL = new DnsResponseCode(2, "ServFail");

    /**
     * The 'NXDomain' DNS RCODE (3), as defined in RFC1035.
     */
    public static final DnsResponseCode NXDOMAIN = new DnsResponseCode(3, "NXDomain");

    /**
     * The 'NotImp' DNS RCODE (4), as defined in RFC1035.
     */
    public static final DnsResponseCode NOTIMP = new DnsResponseCode(4, "NotImp");

    /**
     * The 'Refused' DNS RCODE (5), as defined in RFC1035.
     */
    public static final DnsResponseCode REFUSED = new DnsResponseCode(5, "Refused");

    /**
     * The 'YXDomain' DNS RCODE (6), as defined in RFC2136.
     */
    public static final DnsResponseCode YXDOMAIN = new DnsResponseCode(6, "YXDomain");

    /**
     * The 'YXRRSet' DNS RCODE (7), as defined in RFC2136.
     */
    public static final DnsResponseCode YXRRSET = new DnsResponseCode(7, "YXRRSet");

    /**
     * The 'NXRRSet' DNS RCODE (8), as defined in RFC2136.
     */
    public static final DnsResponseCode NXRRSET = new DnsResponseCode(8, "NXRRSet");

    /**
     * The 'NotAuth' DNS RCODE (9), as defined in RFC2136.
     */
    public static final DnsResponseCode NOTAUTH = new DnsResponseCode(9, "NotAuth");

    /**
     * The 'NotZone' DNS RCODE (10), as defined in RFC2136.
     */
    public static final DnsResponseCode NOTZONE = new DnsResponseCode(10, "NotZone");

    /**
     * The 'BADVERS' or 'BADSIG' DNS RCODE (16), as defined in RFC2671
     * and RFC2845.
     */
    public static final DnsResponseCode BADVERS_OR_BADSIG = new DnsResponseCode(16, "BADVERS_OR_BADSIG");

    /**
     * The 'BADKEY' DNS RCODE (17), as defined in RFC2845.
     */
    public static final DnsResponseCode BADKEY = new DnsResponseCode(17, "BADKEY");

    /**
     * The 'BADTIME' DNS RCODE (18), as defined in RFC2845.
     */
    public static final DnsResponseCode BADTIME = new DnsResponseCode(18, "BADTIME");

    /**
     * The 'BADMODE' DNS RCODE (19), as defined in RFC2930.
     */
    public static final DnsResponseCode BADMODE = new DnsResponseCode(19, "BADMODE");

    /**
     * The 'BADNAME' DNS RCODE (20), as defined in RFC2930.
     */
    public static final DnsResponseCode BADNAME = new DnsResponseCode(20, "BADNAME");

    /**
     * The 'BADALG' DNS RCODE (21), as defined in RFC2930.
     */
    public static final DnsResponseCode BADALG = new DnsResponseCode(21, "BADALG");

    /**
     * Returns the {@link DnsResponseCode} that corresponds with the given {@code responseCode}.
     *
     * @param responseCode the DNS RCODE
     *
     * @return the corresponding {@link DnsResponseCode}
     */
    public static DnsResponseCode valueOf(int responseCode) {
        switch (responseCode) {
        case 0:
            return NOERROR;
        case 1:
            return FORMERR;
        case 2:
            return SERVFAIL;
        case 3:
            return NXDOMAIN;
        case 4:
            return NOTIMP;
        case 5:
            return REFUSED;
        case 6:
            return YXDOMAIN;
        case 7:
            return YXRRSET;
        case 8:
            return NXRRSET;
        case 9:
            return NOTAUTH;
        case 10:
            return NOTZONE;
        case 16:
            return BADVERS_OR_BADSIG;
        case 17:
            return BADKEY;
        case 18:
            return BADTIME;
        case 19:
            return BADMODE;
        case 20:
            return BADNAME;
        case 21:
            return BADALG;
        default:
            return new DnsResponseCode(responseCode);
        }
    }

    private final int code;
    private final String name;
    private String text;

    private DnsResponseCode(int code) {
        this(code, "UNKNOWN");
    }

    public DnsResponseCode(int code, String name) {
        if (code < 0 || code > 65535) {
            throw new IllegalArgumentException("code: " + code + " (expected: 0 ~ 65535)");
        }

        this.code = code;
        this.name = checkNotNull(name, "name");
    }

    /**
     * Returns the error code for this {@link DnsResponseCode}.
     */
    public int intValue() {
        return code;
    }

    @Override
    public int compareTo(DnsResponseCode o) {
        return intValue() - o.intValue();
    }

    @Override
    public int hashCode() {
        return intValue();
    }

    /**
     * Equality of {@link DnsResponseCode} only depends on {@link #intValue()}.
     */
    @Override
    public boolean equals(Object o) {
        if (!(o instanceof DnsResponseCode)) {
            return false;
        }

        return intValue() == ((DnsResponseCode) o).intValue();
    }

    /**
     * Returns a formatted error message for this {@link DnsResponseCode}.
     */
    @Override
    public String toString() {
        String text = this.text;
        if (text == null) {
            this.text = text = name + '(' + intValue() + ')';
        }
        return text;
    }
}