nl.sidn.dnslib.types.OpcodeType.java Source code

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Here is the source code for nl.sidn.dnslib.types.OpcodeType.java

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/*
 * ENTRADA, a big data platform for network data analytics
 *
 * Copyright (C) 2016 SIDN [https://www.sidn.nl]
 * 
 * This file is part of ENTRADA.
 * 
 * ENTRADA is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * ENTRADA is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with ENTRADA.  If not, see [<http://www.gnu.org/licenses/].
 *
 */
package nl.sidn.dnslib.types;

import java.util.HashMap;
import java.util.Map;

import org.apache.commons.lang3.StringUtils;

/**
 * 
 * DNS OpCodes
    
   Registration Procedures
   Standards Action as modified by [RFC4020]
   Reference
   [RFC-ietf-dnsext-rfc6195bis-05][RFC1035]
   OpCode    Name    Reference 
   0   Query   [RFC1035]
   1   IQuery (Inverse Query, OBSOLETE)   [RFC3425]
   2   Status   [RFC1035]
   3   Unassigned   
   4   Notify   [RFC1996]
   5   Update   [RFC2136]
   6-15   Unassigned   
    
 *
 */
public enum OpcodeType {

    STANDARD(0), INVERSE(1), STATUS(2), UNASSIGNED_3(3), NOTIFY(4), UPPDATE(5), UNASSIGNED(-1);

    private int value;

    private static Map<String, OpcodeType> types = new HashMap<>();
    private static Map<Integer, OpcodeType> typesToInt = new HashMap<>();

    static {
        OpcodeType[] values = values();
        for (OpcodeType type : values) {
            types.put(type.name(), type);
            typesToInt.put(new Integer(type.getValue()), type);
        }
    }

    public static OpcodeType fromString(String name) {
        return types.get(StringUtils.upperCase(name));
    }

    public static OpcodeType fromValue(int value) {
        OpcodeType type = typesToInt.get(new Integer(value));
        if (type == null) {
            return UNASSIGNED;
        }

        return type;
    }

    private OpcodeType(int value) {
        this.value = value;
    }

    public int getValue() {
        return value;
    }

}