private string GenerateKey(SqlStatement <T> statement)
{
//use the type name of the mapped class as first key part
//this will allow us to clear all objects in the cache with the same type
var firstKeyPart = typeof(T).FullName;
//hash the query and parameters
var query = statement.GenerateSqlStatement();
using (var md5 = System.Security.Cryptography.MD5.Create())
{
//hash query
var hashedBytes = md5.ComputeHash(Encoding.UTF8.GetBytes(query));
var secondKeyPart = Convert.ToBase64String(hashedBytes);
//hash the parameters
var sb = new StringBuilder();
foreach (var parameter in statement.Parameters)
{
sb.Append(parameter.Name).Append(parameter.Value);
}
string parameters = sb.ToString();
hashedBytes = md5.ComputeHash(Encoding.UTF8.GetBytes(parameters));
var thirdKeyPart = Convert.ToBase64String(hashedBytes);
//build the key
return($"{firstKeyPart}_{secondKeyPart}_{thirdKeyPart}");
}
}
