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

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `execute(T input)` Performs an action on the specified input object.

- - ### Method Detail

    - #### 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

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