# Class ExceptionClosure<T>

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

Type Parameters:
  `T` - the type of the input to the operation.

All Implemented Interfaces:
  `Serializable`, `Consumer<T>`, `Closure<T>`

public final class ExceptionClosure<T> extends Object implements Closure<T>, Serializable
Closure implementation that always throws an exception.

Since:
  3.0
See Also:
  - Serialized Form

- ## Field Summary

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

- ## Method Summary

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

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

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

  ### Methods inherited from interface org.apache.commons.collections4.Closure

  `accept`

  ### Methods inherited from interface java.util.function.Consumer

  `andThen`

- ## Field Details

  - ### INSTANCE

    public static final Closure INSTANCE
    Singleton predicate instance

- ## Method Details

  - ### exceptionClosure

    public static <T> Closure<T> exceptionClosure()
    Factory returning the singleton instance.
    Type Parameters:
      `T` - the type of the input to the operation.
    Returns:
      the singleton instance
    Since:
      3.1

  - ### execute

    public void execute(T input)
    Always throw an exception.
    Specified by:
      `execute` in interface `Closure<T>`
    Parameters:
      `input` - the input object
    Throws:
      `FunctorException` - always