/*

 * Copyright (c) 2006, 2012, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package sun.security.ssl;

import java.util.ArrayList;

import java.util.List;

final class ExtensionType {

    final int id;

    final String name;

    private ExtensionType(int id, String name) {

        this.id = id;

        this.name = name;

    }

    public String toString() {

        return name;

    }

    static List<ExtensionType> knownExtensions = new ArrayList<ExtensionType>(9);

    static ExtensionType get(int id) {

        for (ExtensionType ext : knownExtensions) {

            if (ext.id == id) {

                return ext;

            }

        }

        return new ExtensionType(id, "type_" + id);

    }

    private static ExtensionType e(int id, String name) {

        ExtensionType ext = new ExtensionType(id, name);

        knownExtensions.add(ext);

        return ext;

    }

    // extensions defined in RFC 3546

    final static ExtensionType EXT_SERVER_NAME =

            e(0x0000, "server_name");            // IANA registry value: 0

    final static ExtensionType EXT_MAX_FRAGMENT_LENGTH =

            e(0x0001, "max_fragment_length");    // IANA registry value: 1

    final static ExtensionType EXT_CLIENT_CERTIFICATE_URL =

            e(0x0002, "client_certificate_url"); // IANA registry value: 2

    final static ExtensionType EXT_TRUSTED_CA_KEYS =

            e(0x0003, "trusted_ca_keys");        // IANA registry value: 3

    final static ExtensionType EXT_TRUNCATED_HMAC =

            e(0x0004, "truncated_hmac");         // IANA registry value: 4

    final static ExtensionType EXT_STATUS_REQUEST =

            e(0x0005, "status_request");         // IANA registry value: 5

    // extensions defined in RFC 4681

    final static ExtensionType EXT_USER_MAPPING =

            e(0x0006, "user_mapping");           // IANA registry value: 6

    // extensions defined in RFC 5081

    final static ExtensionType EXT_CERT_TYPE =

            e(0x0009, "cert_type");              // IANA registry value: 9

    // extensions defined in RFC 4492 (ECC)

    final static ExtensionType EXT_ELLIPTIC_CURVES =

            e(0x000A, "elliptic_curves");        // IANA registry value: 10

    final static ExtensionType EXT_EC_POINT_FORMATS =

            e(0x000B, "ec_point_formats");       // IANA registry value: 11

    // extensions defined in RFC 5054

    final static ExtensionType EXT_SRP =

            e(0x000C, "srp");                    // IANA registry value: 12

    // extensions defined in RFC 5246

    final static ExtensionType EXT_SIGNATURE_ALGORITHMS =

            e(0x000D, "signature_algorithms");   // IANA registry value: 13

    // extensions defined in RFC 5746

    final static ExtensionType EXT_RENEGOTIATION_INFO =

            e(0xff01, "renegotiation_info");     // IANA registry value: 65281

}