org.apache.commons.collections4.functors

## Class ExceptionTransformer<I,O>

- java.lang.Object
- - org.apache.commons.collections4.functors.ExceptionTransformer<I,O>

- All Implemented Interfaces:
    Serializable, Transformer<I,O>

      public final class ExceptionTransformer<I,O>
      extends Object
      implements Transformer<I,O>, Serializable

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

- - ### Field Summary

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

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `static <I,O> Transformer<I,O>` | `exceptionTransformer()` Factory returning the singleton instance.
    `O` | `transform(I input)` Transforms the input to result by cloning it.

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

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

- - ### Field Detail

    - #### INSTANCE

          public static final Transformer INSTANCE

      Singleton predicate instance

  - ### Method Detail

    - #### exceptionTransformer

          public static <I,O> Transformer<I,O> exceptionTransformer()

      Factory returning the singleton instance.
      Type Parameters:
        `I` - the input type
        `O` - the output type
      Returns:
        the singleton instance
      Since:
        3.1

    - #### transform

          public O transform(I input)

      Transforms the input to result by cloning it.
      Specified by:
        `transform` in interface `Transformer<I,O>`
      Parameters:
        `input` - the input object to transform
      Returns:
        never
      Throws:
        `FunctorException` - always

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