/// <summary>
/// Performs a default comparison of two objects of the same type and returns a value indicating whether one object is less than, equal to, or greater than the other.
/// </summary>
/// <typeparam name="T">The type of the objects to compare.</typeparam>
/// <param name="x">The first object to compare.</param>
/// <param name="y">The second object to compare.</param>
/// <param name="typeSelector">The function delegate that is used to select the <see cref="Type"/> of the objects to compare.</param>
/// <param name="valueSelector">The function delegate that is used to select the value of <paramref name="x"/> and <paramref name="y"/>.</param>
/// <returns>A signed integer that indicates the relative values of <paramref name="x"/> and <paramref name="y"/>.</returns>
public static int Default <T>(T x, T y, Func <T, Type> typeSelector, Func <T, object> valueSelector)
{
Validator.ThrowIfNull(typeSelector, nameof(typeSelector));
Validator.ThrowIfNull(valueSelector, nameof(valueSelector));
object xValue = valueSelector(x);
object yValue = valueSelector(y);
TypeCode code = TypeCodeConverter.FromType(typeSelector(x));
switch (code)
{
case TypeCode.Boolean:
return(Comparer <bool> .Default.Compare(Converter.FromObject <bool>(xValue), Converter.FromObject <bool>(yValue)));
case TypeCode.Byte:
return(Comparer <byte> .Default.Compare(Converter.FromObject <byte>(xValue), Converter.FromObject <byte>(yValue)));
case TypeCode.Char:
return(Comparer <char> .Default.Compare(Converter.FromObject <char>(xValue), Converter.FromObject <char>(yValue)));
case TypeCode.DateTime:
return(Comparer <DateTime> .Default.Compare(Converter.FromObject <DateTime>(xValue), Converter.FromObject <DateTime>(yValue)));
case TypeCode.Decimal:
return(Comparer <decimal> .Default.Compare(Converter.FromObject <decimal>(xValue), Converter.FromObject <decimal>(yValue)));
case TypeCode.Double:
return(Comparer <double> .Default.Compare(Converter.FromObject <double>(xValue), Converter.FromObject <double>(yValue)));
case TypeCode.Int16:
return(Comparer <short> .Default.Compare(Converter.FromObject <short>(xValue), Converter.FromObject <short>(yValue)));
case TypeCode.Int32:
return(Comparer <int> .Default.Compare(Converter.FromObject <int>(xValue), Converter.FromObject <int>(yValue)));
case TypeCode.Int64:
return(Comparer <long> .Default.Compare(Converter.FromObject <long>(xValue), Converter.FromObject <long>(yValue)));
case TypeCode.SByte:
return(Comparer <sbyte> .Default.Compare(Converter.FromObject <sbyte>(xValue), Converter.FromObject <sbyte>(yValue)));
case TypeCode.Single:
return(Comparer <float> .Default.Compare(Converter.FromObject <float>(xValue), Converter.FromObject <float>(yValue)));
case TypeCode.String:
return(Comparer <string> .Default.Compare(Converter.FromObject <string>(xValue), Converter.FromObject <string>(yValue)));
case TypeCode.UInt16:
return(Comparer <ushort> .Default.Compare(Converter.FromObject <ushort>(xValue), Converter.FromObject <ushort>(yValue)));
case TypeCode.UInt32:
return(Comparer <uint> .Default.Compare(Converter.FromObject <uint>(xValue), Converter.FromObject <uint>(yValue)));
case TypeCode.UInt64:
return(Comparer <ulong> .Default.Compare(Converter.FromObject <ulong>(xValue), Converter.FromObject <ulong>(yValue)));
default:
return(Comparer <object> .Default.Compare(Converter.FromObject <object>(xValue), Converter.FromObject <object>(yValue)));
}
}
/// <summary>
/// Initializes a new instance of the <see cref="ObjectHierarchyOptions"/> class.
/// </summary>
public ObjectHierarchyOptions()
{
MaxDepth = 10;
MaxCircularCalls = 2;
SkipPropertyType = source =>
{
switch (TypeCodeConverter.FromType(source))
{
case TypeCode.Boolean:
case TypeCode.Byte:
case TypeCode.Decimal:
case TypeCode.Double:
case TypeCode.Empty:
case TypeCode.Int16:
case TypeCode.Int32:
case TypeCode.Int64:
case TypeCode.SByte:
case TypeCode.Single:
case TypeCode.UInt16:
case TypeCode.UInt32:
case TypeCode.UInt64:
case TypeCode.String:
return(true);
default:
if (TypeUtility.IsKeyValuePair(source))
{
return(true);
}
if (TypeUtility.ContainsType(source, typeof(MemberInfo)))
{
return(true);
}
return(false);
}
};
SkipProperty = property =>
{
return(property.PropertyType.GetTypeInfo().IsMarshalByRef ||
property.PropertyType.GetTypeInfo().IsSubclassOf(typeof(Delegate)) ||
property.Name.Equals("SyncRoot", StringComparison.Ordinal) ||
property.Name.Equals("IsReadOnly", StringComparison.Ordinal) ||
property.Name.Equals("IsFixedSize", StringComparison.Ordinal) ||
property.Name.Equals("IsSynchronized", StringComparison.Ordinal) ||
property.Name.Equals("Count", StringComparison.Ordinal) ||
property.Name.Equals("HResult", StringComparison.Ordinal) ||
property.Name.Equals("TargetSite", StringComparison.Ordinal));
};
HasCircularReference = ReflectionUtility.HasCircularReference;
PropertyIndexParametersResolver = infos =>
{
List <object> resolvedParameters = new List <object>();
for (int i = 0; i < infos.Length; i++)
{
// because we don't know the values to pass to an indexer we will try to do some assumptions on a "normal" indexer
// however; this has it flaws: an indexer does not necessarily have an item on 0, 1, 2 etc., so must handle the possible
// TargetInvocationException.
// more info? check here: http://blog.nkadesign.com/2006/net-the-limits-of-using-reflection/comment-page-1/#comment-10813
if (TypeUtility.ContainsType(infos[i].ParameterType, typeof(Byte), typeof(Int16), typeof(Int32), typeof(Int64))) // check to see if we have a "normal" indexer
{
resolvedParameters.Add(0);
}
}
return(resolvedParameters.ToArray());
};
}