org.apache.commons.collections4.functors

## Class ExceptionClosure<E>

- java.lang.Object
- - org.apache.commons.collections4.functors.ExceptionClosure<E>

- All Implemented Interfaces:
    Serializable, Closure<E>

      public final class ExceptionClosure<E>
      extends Object
      implements Closure<E>, Serializable

  Closure implementation that always throws an exception.
  Since:
    3.0
  Version:
    $Id: ExceptionClosure.java 1543950 2013-11-20 21:13:35Z tn $
  See Also:
    Serialized Form

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static Closure` | `INSTANCE` Singleton predicate instance

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `static <E> Closure<E>` | `exceptionClosure()` Factory returning the singleton instance.
    `void` | `execute(E input)` Always throw an exception.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Field Detail

    - #### INSTANCE

          public static final Closure INSTANCE

      Singleton predicate instance

  - ### Method Detail

    - #### exceptionClosure

          public static <E> Closure<E> exceptionClosure()

      Factory returning the singleton instance.
      Type Parameters:
        `E` - the type that the closure acts on
      Returns:
        the singleton instance
      Since:
        3.1

    - #### execute

          public void execute(E input)

      Always throw an exception.
      Specified by:
        `execute` in interface `Closure<E>`
      Parameters:
        `input` - the input object
      Throws:
        `FunctorException` - always

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