DnsServer/DnsServerCore/Dns/Zones/Zone.cs

/*
Technitium DNS Server
Copyright (C) 2020  Shreyas Zare (shreyas@technitium.com)

This program 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.

This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.

*/

using System.Collections.Concurrent;
using System.Collections.Generic;
using TechnitiumLibrary.Net.Dns;

namespace DnsServerCore.Dns.Zones
{
    public abstract class Zone
    {
        #region variables

        protected readonly string _name;
        protected readonly ConcurrentDictionary<DnsResourceRecordType, IReadOnlyList<DnsResourceRecord>> _entries = new ConcurrentDictionary<DnsResourceRecordType, IReadOnlyList<DnsResourceRecord>>();

        #endregion

        #region constructor

        protected Zone(string name)
        {
            _name = name;
        }

        #endregion

        #region public

        public List<DnsResourceRecord> ListAllRecords()
        {
            List<DnsResourceRecord> records = new List<DnsResourceRecord>(_entries.Count * 2);

            foreach (KeyValuePair<DnsResourceRecordType, IReadOnlyList<DnsResourceRecord>> entry in _entries)
                records.AddRange(entry.Value);

            return records;
        }

        public abstract bool ContainsNameServerRecords();

        #endregion

        #region properties

        public string Name
        { get { return _name; } }

        public bool IsEmpty
        { get { return _entries.IsEmpty; } }

        #endregion
    }
}