org.apache.commons.collections4.functors

## Class NOPTransformer<T>

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

- All Implemented Interfaces:
    Serializable, Transformer<T,T>

      public class NOPTransformer<T>
      extends Object
      implements Transformer<T,T>, Serializable

  Transformer implementation that does nothing.
  Since:
    3.0
  Version:
    $Id: NOPTransformer.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 <T> Transformer<T,T>` | `nopTransformer()` Factory returning the singleton instance.
    `T` | `transform(T input)` Transforms the input to result by doing nothing.

    - ### 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

    - #### nopTransformer

          public static <T> Transformer<T,T> nopTransformer()

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

    - #### transform

          public T transform(T input)

      Transforms the input to result by doing nothing.
      Specified by:
        `transform` in interface `Transformer<T,T>`
      Parameters:
        `input` - the input object to transform
      Returns:
        the transformed result which is the input

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