Inheriting Attributes from an Interface
[AttributeUsage(AttributeTargets.Property | AttributeTargets.Method)]
public
class
SomeAttribute : System.Attribute { }
public
interface
ISomeInterface
{
[SomeAttribute]
string Property { get; set;}
[SomeAttribute]
string GetProperty();
}
public
class
SomeClass : ISomeInterface
{
public
string Property
{
get { throw
new
NotImplementedException(); }
set { throw
new
NotImplementedException(); }
}
public
string GetProperty() { throw
new
NotImplementedException(); }
}
[TestMethod()]
public
void TestAttributeOn_ISomeInterface_PropertyInfo()
{
Type t = typeof(ISomeInterface);
PropertyInfo propInfo = t.GetProperty("Property");
Assert.IsNotNull(System.Attribute.GetCustomAttribute(propInfo, typeof(SomeAttribute)));
}
[TestMethod()]
public
void TestAttributeOn_SomeClass_PropertyInfo()
{
Type t = typeof(SomeClass);
PropertyInfo propInfo = t.GetProperty("Property");
Assert.IsNotNull(System.Attribute.GetCustomAttribute(propInfo, typeof(SomeAttribute), true));
}
[TestMethod()]
public
void TestAttributeOn_SomeClass_GetProperty()
{
Type t = typeof(SomeClass);
MethodInfo methodInfo = t.GetMethod("GetProperty");
Assert.IsNotNull(System.Attribute.GetCustomAttribute(methodInfo, typeof(SomeAttribute), true));
}
So the second and third test (TestAttributeOn_SomeClass_PropertyInfo, TestAttributeOn_SomeClass_GetProperty) fails.
So if I think of WCF we define an interface with attributes.
Example:
[ServiceContract]
public
interface
ICustomers
{
[OperationContract]
string GetCustomer();
}
So surely if WCF can inherit attributes we should also be able to do so too!
But wait a minute in WCF only the interface is exposed. Damn!
So what is the solution? Recursively check for attributes on inherited interfaces?!