Created
November 5, 2019 12:50
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Random domain string generator
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| using System; | |
| using System.Linq; | |
| public sealed class StringGenerator | |
| { | |
| private const int DefaultRandomStringLength = 10; | |
| private static readonly Random Rnd = new Random(); | |
| private volatile char[] _charDomain; | |
| public char[] CharacterDomain | |
| { | |
| get { return _charDomain; } | |
| set | |
| { | |
| if (value == null) | |
| throw new ArgumentNullException(nameof(value)); | |
| if (value.Length <= 0) | |
| throw new ArgumentException("Char domain can't be empty", nameof(value)); | |
| var newDomain = value.DistinctBy(x => x).OrderBy(x => x).ToArray(); | |
| _charDomain = newDomain; | |
| } | |
| } | |
| public StringGenerator() | |
| { | |
| CharacterDomain = @"ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789".ToCharArray(); | |
| } | |
| public string GetString() | |
| { | |
| return GetString(DefaultRandomStringLength); | |
| } | |
| public string GetString(int count) | |
| { | |
| if (count <= 0) | |
| throw new ArgumentOutOfRangeException(nameof(count)); | |
| var res = new char[count]; | |
| var domain = CharacterDomain; | |
| // TODO: get rid off static Random (thread-local Randoms are no good too actually) | |
| lock (Rnd) | |
| { | |
| for (var i = 0; i < count; i++) | |
| { | |
| var charIdx = Rnd.Next(domain.Length); | |
| res[i] = domain[charIdx]; | |
| } | |
| } | |
| return new string(res); | |
| } | |
| } |
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