Marker interface pattern: Difference between revisions

Revision as of 01:30, 7 July 2009

Revision as of 19:50, 26 March 2010

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* Both the [[.NET Framework|.NET framework]] and [[Java (software platform)|Java]] (as of Java 5 (1.5)) provide support for such metadata. In .NET, they are called ''"custom attributes"'', in Java they are called ''"annotations"''. Despite the different name, they are conceptually the same thing. They can be defined on classes, member variables, methods, and method parameters and may be accessed using [[Reflection_(computer_science)|reflection]].

* In [[Python (programming language)|Python]], the term "marker interface" is common in [[Zope 3]] and [[Plone (software)|Plone]]. Interfaces are declared as metadata and subclasses can use <code>implementsOnly</code> to declare they do not implement everything from their super classes.

== See also ==