/// <summary>
/// Tries to retrieve an <see cref="IOptionBuilder"/> via attributes for a given
/// type.
/// </summary>
/// <remarks>
/// This method constructs a builder using the <see cref="OptionBuilderAttribute"/>.
/// </remarks>
/// <param name="type">The type to introspect.</param>
/// <returns>An instance or <see langword="null"/>.</returns>
public static IOptionBuilder GetOptionBuilderFromAttribute(Type type)
{
object[] builderAttributes = type.GetCustomAttributes(typeof(OptionBuilderAttribute), true);
if (builderAttributes.Length > 0)
{
OptionBuilderAttribute mapBuilderAttr = builderAttributes[0] as OptionBuilderAttribute;
if (mapBuilderAttr != null)
{
try {
return(Activator.CreateInstance(mapBuilderAttr.OptionBuilderType) as IOptionBuilder);
} catch (Exception exc) {
Trace.WriteLine("Unable to create OptionBuilder for type " + type + ": " + exc.Message);
}
}
}
return(null);
}
private IOptionBuilder GetBuilder(PropertyInfo info, IOptionBuilderContext context, object subject, Type type)
{
IOptionBuilder builder = null;
OptionBuilderAttribute builderAttribute =
(OptionBuilderAttribute)Attribute.GetCustomAttribute(info, typeof(OptionBuilderAttribute));
if (builderAttribute != null)
{
builder = Activator.CreateInstance(builderAttribute.OptionBuilderType) as IOptionBuilder;
}
else
{
object value = info.GetGetMethod().Invoke(subject, null);
builder = context.GetOptionBuilder(type, value);
}
return(builder);
}
