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gurux.dlms.java package is used to communicate with DLMS devices.
There is a newer version: 4.0.72
//
// --------------------------------------------------------------------------
//  Gurux Ltd
// 
//
//
// Filename:        $HeadURL$
//
// Version:         $Revision$,
//                  $Date$
//                  $Author$
//
// Copyright (c) Gurux Ltd
//
//---------------------------------------------------------------------------
//
//  DESCRIPTION
//
// This file is a part of Gurux Device Framework.
//
// Gurux Device Framework is Open Source 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; version 2 of the License.
// Gurux Device Framework 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.
//
// More information of Gurux products: https://www.gurux.org
//
// This code is licensed under the GNU General Public License v2. 
// Full text may be retrieved at http://www.gnu.org/licenses/gpl-2.0.txt
//---------------------------------------------------------------------------

package gurux.dlms.enums;

/**
 * Used security model.
 */
public enum Security {
    /**
     * Transport security is not used.
     */
    NONE(0),

    /**
     * Authentication security is used.
     */
    AUTHENTICATION(0x10),

    /**
     * Encryption security is used.
     */
    ENCRYPTION(0x20),

    /**
     * Authentication and Encryption security are used.
     */
    AUTHENTICATION_ENCRYPTION(0x30);

    private int intValue;
    private static java.util.HashMap mappings;

    private static java.util.HashMap getMappings() {
        if (mappings == null) {
            synchronized (Security.class) {
                if (mappings == null) {
                    mappings = new java.util.HashMap();
                }
            }
        }
        return mappings;
    }

    Security(final int value) {
        intValue = value;
        getMappings().put(value, this);
    }

    public int getValue() {
        return intValue;
    }

    public static Security forValue(final int value) {
        Security tmp = getMappings().get(value);
        if (tmp == null) {
            throw new IllegalArgumentException("Invalid security integer value.");
        }
        return tmp;
    }

    @Override
    public String toString() {
        String str;
        Security value = Security.forValue(getValue());
        switch (value) {
        case NONE:
            str = "NONE";
            break;
        case AUTHENTICATION:
            str = "AUTHENTICATION";
            break;
        case ENCRYPTION:
            str = "ENCRYPTION";
            break;
        case AUTHENTICATION_ENCRYPTION:
            str = "AUTHENTICATION_ENCRYPTION";
            break;
        default:
            throw new IllegalArgumentException("Security");
        }
        return str;
    }

    public static Security valueOfString(final String value) {
        Security v;
        if ("NONE".equalsIgnoreCase(value)) {
            v = Security.NONE;
        } else if ("AUTHENTICATION".equalsIgnoreCase(value)) {
            v = Security.AUTHENTICATION;
        } else if ("ENCRYPTION".equalsIgnoreCase(value)) {
            v = Security.ENCRYPTION;
        } else if ("AUTHENTICATION_ENCRYPTION".equalsIgnoreCase(value)) {
            v = Security.AUTHENTICATION_ENCRYPTION;
        } else {
            throw new IllegalArgumentException(value);
        }
        return v;
    }
}