using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Pomelo.DotNetClient
{
    internal class UTF8BytesCache
    {
        public static readonly UTF8BytesCache Instance = new UTF8BytesCache();

        private readonly Dictionary<string, byte[]> cache = new Dictionary<string, byte[]>();

        private UTF8BytesCache(){}

        public byte[] GetBytes(string str)
        {
            lock(cache)
            {
                byte[] ret;
                if (cache.TryGetValue(str, out ret))
                {
                    return ret;
                }
                ret = Encoding.UTF8.GetBytes(str);
                cache.Add(str, ret);
                return ret;
            }
        }
    }
}