Package org.apache.commons.collections4

# Interface Closure<T>

Type Parameters:
  `T` - the type that the closure acts on

All Known Implementing Classes:
  `CatchAndRethrowClosure`, `ChainedClosure`, `ExceptionClosure`, `ForClosure`, `IfClosure`, `NOPClosure`, `SwitchClosure`, `TransformerClosure`, `WhileClosure`

Functional Interface:
  This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface public interface Closure<T>
Defines a functor interface implemented by classes that do something.

A `Closure` represents a block of code which is executed from inside some block, function or iteration. It operates an input object.

Standard implementations of common closures are provided by `ClosureUtils`. These include method invocation and for/while loops.

Since:
  1.0

- ## Method Summary

  Modifier and Type
  Method
  Description
  `void`
  `execute(T input)`
  Performs an action on the specified input object.

- ## Method Details

  - ### execute

    void execute(T input)
    Performs an action on the specified input object.
    Parameters:
      `input` - the input to execute on
    Throws:
      `ClassCastException` - (runtime) if the input is the wrong class
      `IllegalArgumentException` - (runtime) if the input is invalid
      `FunctorException` - (runtime) if any other error occurs