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Groovy delegate, owner, this references.

/ Published in: Groovy
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This, owner, and delegate:
this : as in Java, this refers to the instance of the enclosing class where a Closure is defined
owner : the enclosing object (this or a surrounding closure)
delegate : by default the same as owner, but changeable.
(http://groovy.codehaus.org/Closures).

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  1. class Class1 {
  2.   def closure = {
  3.     println this.class.name
  4.     println delegate.class.name
  5.     def nestedClos = {
  6.       println owner.class.name
  7.     }
  8.     nestedClos()
  9.   }
  10. }
  11.  
  12. def clos = new Class1().closure
  13. clos.delegate = this
  14. clos()
  15. /*prints:
  16.  Class1
  17.  Script1
  18.  Class1$_closure1  */

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