Groovy Mixin on Instance (Dynamic Mixin)
I'm trying to achieve following:
class A {
def foo() { "foo" }
}
class B {
def bar() { "bar" }
}
A.开发者_运维问答mixin B
def a = new A()
a.foo() + a.bar()
with one significant difference - I would like to do the mixin on the instance:
a.mixin B
but this results in
groovy.lang.MissingMethodException: No signature of method: A.mixin() is applicable for argument types: (java.lang.Class) values: [class B]
Is there a way to get this working like proposed in the Groovy Mixins JSR?
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()
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