private IStructuralEquatable GetKey(IDataRecord dataRecord)
{
Func <IDataRecord, IStructuralEquatable> keyDelegate = keyDelegateBuilder.CreateKeyDelegate(typeof(T), dataRecord);
if (keyDelegate == null)
{
return(null);
}
var key = keyDelegate(dataRecord);
return(key);
}
/// <summary>
/// Creates a function delegate that returns a <see cref="IStructuralEquatable"/> instance,
/// representing the key values for the given <paramref name="type"/>.
/// </summary>
/// <param name="type">The <see cref="Type"/> for which to build the delegate.</param>
/// <param name="dataRecord">The <see cref="IDataRecord"/> containing the target fields/columns.</param>
/// <returns>A function delegate used to retrieve key values for the given <paramref name="type"/>.</returns>
public Func <IDataRecord, IStructuralEquatable> CreateKeyDelegate(Type type, IDataRecord dataRecord)
{
return(cache.GetOrAdd(type, t => keyDelegateBuilder.CreateKeyDelegate(t, dataRecord)));
}