Groovy's dynamic nature makes it easy to extend classes with new behaviour. One of the ways is to add methods or property to the metaClass property of a class. We can use the same mechanism to add static methods to the class. We only have to specify the keyword 'static' when we define the new method.
class User {
String username, email
String toString() { "$username, $email" }
}
User.metaClass.static.new = { u, e ->
new User(username: u, email: e)
}
def u = User.new('mrhaki', 'mail@host.com')
assert 'mrhaki' == u.username
assert 'mail@host.com' == u.email
