/// <summary>
/// Handles the signaling of this <see cref="DataWatcher"/>.
/// </summary>
protected override void HandleSignaling()
{
lock (_locker)
{
DateTime utcLastModified = DateTime.UtcNow;
List <object[]> values = new List <object[]>();
DataManager manager = Manager.Clone();
using (DbDataReader reader = manager.ExecuteReader(Command, Parameters))
{
while (reader.Read())
{
object[] readerValues = new object[reader.FieldCount];
reader.GetValues(readerValues);
values.Add(readerValues);
}
}
long currentSignature = StructUtility.GetHashCode64(EnumerableConverter.Parse(values, o => o.GetHashCode()));
values.Clear();
if (Signature == 0)
{
Signature = currentSignature;
}
if (!Signature.Equals(currentSignature))
{
SetUtcLastModified(utcLastModified);
OnChangedRaised();
}
Signature = currentSignature;
}
}
/// <summary>
/// Combines a sequence of objects into one object, and computes a hash value of the specified <paramref name="values"/>.
/// </summary>
/// <param name="values">The objects to compute a hash code for.</param>
/// <param name="setup">The <see cref="HashOptions"/> which need to be configured.</param>
/// <returns>A <see cref="HashResult"/> containing the computed hash value of the specified object sequence <paramref name="values"/>.</returns>
public static HashResult ComputeHash(object[] values, Action <HashOptions> setup = null)
{
Validator.ThrowIfNull(values, nameof(values));
var options = setup.ConfigureOptions();
long signature = StructUtility.GetHashCode64(EnumerableConverter.Parse(values, o => o.GetHashCode()));
return(ComputeHash(BitConverter.GetBytes(signature), o => o.AlgorithmType = options.AlgorithmType));
}
/// <summary>
/// Combines the specified form-data <paramref name="values"/> into one <see cref="NameValueCollection"/> equivalent.
/// </summary>
/// <param name="values">A variable number of form-data <paramref name="values"/>.</param>
/// <returns>A <see cref="NameValueCollection"/> equivalent to the combined form-data <paramref name="values"/>.</returns>
public static NameValueCollection Combine(params string[] values)
{
Validator.ThrowIfNull(values, nameof(values));
return(Combine(EnumerableConverter.Parse(values, FormConverter.FromString).ToArray()));
}