static InjectableInfo CreateForConstructorParam(
Type enclosingType, ParameterInfo paramInfo)
{
var injectAttr = paramInfo.Attribute<InjectAttribute>();
return new InjectableInfo()
{
Optional = paramInfo.HasAttribute(typeof(InjectOptionalAttribute)),
Identifier = (injectAttr == null ? null : injectAttr.Identifier),
SourceName = paramInfo.Name,
ContractType = paramInfo.ParameterType,
EnclosingType = enclosingType,
};
}
/// <summary>
/// Gets the default value associated with the given <paramref name="parameter"/>. The value is
/// obtained from the <see href="DefaultValueAttribute"/> if present on the parameter. This method
/// does not support C# 4.0 default parameter specifications.
/// </summary>
/// <returns>The default value if one could be obtained and converted into the type of the parameter,
/// and null otherwise.</returns>
public static object DefaultValue(this ParameterInfo parameter)
{
var defaultValue = parameter.Attribute <DefaultValueAttribute>();
return(defaultValue != null?Probing.TypeConverter.Get(parameter.ParameterType, defaultValue.Value) : null);
}
/// <summary>
/// Determines whether the given <paramref name="parameter"/> has an associated default value as
/// supplied by an <see href="DefaultValueAttribute"/>. This method does not read the value of
/// the attribute. It also does not support C# 4.0 default parameter specifications.
/// </summary>
/// <returns>True if the attribute was detected, false otherwise.</returns>
public static bool HasDefaultValue(this ParameterInfo parameter)
{
var defaultValue = parameter.Attribute <DefaultValueAttribute>();
return(defaultValue != null);
}
