Groovy Mixin on Instance (Dynamic Mixin)

Question

I\'m trying to achieve following:

class A {
  def foo() { \"foo\" }
}

class B {
  def bar() { \"bar\" }
}

A.mixin B
def a = new A()

a.foo() + a.bar()


        

Answer 1

You can do this since Groovy 1.6

Call mixin on the instance metaClass like so:

class A {
  def foo() { "foo" }
}

class B {
  def bar() { "bar" }
}

def a = new A()
a.metaClass.mixin B

a.foo() + a.bar()