Skip to end of metadata
Go to start of metadata

You are viewing an old version of this page. View the current version.

Compare with Current View Page History

« Previous Version 2 Next »

ExpandoMetaClass - Adding methods to interfaces

It is possible to add methods onto interfaces with ExpandoMetaClass. To do this however, it MUST be enabled globally using the ExpandoMetaClass.enableGlobally() method before application start-up.

As an example this code adds a new method to all implementors of java.util.List:

Another example taken from Grails, this code allows access to session attributes using Groovy's subscript operator to all implementors of the HttpSession interface:

  • No labels