public void TestIsInstanceOfGeneric()
{
var p1 = new OptionalParameter <int>();
bool r1 = ReflectionUtilities.IsInstanceOfGeneric(p1, typeof(OptionalParameter <>));
var p2 = new RequiredParameter <string>();
bool r2 = ReflectionUtilities.IsInstanceOfGeneric(p2, typeof(RequiredParameter <>));
Assert.IsTrue(r1);
Assert.IsTrue(r2);
}
// TODO: rewrite this method in following fashion: with regex search for {...}, than search for Fields or Properties with ... name, if they are required check value for null
/// <summary>
/// Returns formatted formula. If formula is longer than maximum allowed length InvalidOperationException is thrown.
/// </summary>
/// <returns>String representation of formula.</returns>
public sealed override string ToString()
{
string formula = this.Template;
MemberInfo[] memberInfos = this.GetType().FindMembers(MemberTypes.Field | MemberTypes.Property, BindingFlags.Public | BindingFlags.Instance, FilterMembers, null);
foreach (MemberInfo memberInfo in memberInfos)
{
object[] requiredAttrs = memberInfo.GetCustomAttributes(typeof(RequiredParameter), false);
object[] optionalAttrs = memberInfo.GetCustomAttributes(typeof(OptionalParameter), false);
object fieldValue = null;
switch (memberInfo.MemberType)
{
case MemberTypes.Field:
{
fieldValue = (memberInfo as FieldInfo).GetValue(this);
break;
}
case MemberTypes.Property:
{
fieldValue = (memberInfo as PropertyInfo).GetValue(this, null);
break;
}
}
// if is required and null throw exception
if (requiredAttrs.Length == 1 && fieldValue == null)
{
throw new ArgumentException(String.Format("Field {0} is required and must not be null.", memberInfo.Name));
}
if (requiredAttrs.Length == 1 && fieldValue != null)
{
RequiredParameter attr = requiredAttrs[0] as RequiredParameter;
// if parameter has overriden Name use it, otherwise use name of field
formula = attr.Name != null
? formula.Replace("{" + attr.Name + "}", fieldValue.ToString())
: formula.Replace("{" + memberInfo.Name + "}", fieldValue.ToString());
}
else if (optionalAttrs.Length == 1 && fieldValue != null)
{
OptionalParameter attr = optionalAttrs[0] as OptionalParameter;
// if parameter has overriden Name use it, otherwise use name of field
formula = attr.Name != null
? formula.Replace("{" + attr.Name + "}", fieldValue.ToString())
: formula.Replace("{" + memberInfo.Name + "}", fieldValue.ToString());
}
else if (optionalAttrs.Length == 1 && fieldValue == null)
{
OptionalParameter attr = optionalAttrs[0] as OptionalParameter;
// if parameter has overriden Name use it, otherwise use name of field
formula = attr.Name != null
? formula.Replace("{" + attr.Name + "}", "")
: formula.Replace("{" + memberInfo.Name + "}", "");
}
}
if (formula.Length > MaximumFormulaLength)
{
throw new InvalidOperationException(String.Format("This formula contains {0} characters which is more than maximum allowed length.", formula.Length));
}
return(formula);
}
