# Class NOPTransformer<T>

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

Type Parameters:
  `T` - the type of the input and result to the function.

All Implemented Interfaces:
  `Serializable`, `Function<T,T>`, `Transformer<T,T>`

public class NOPTransformer<T> extends Object implements Transformer<T,T>, Serializable
Transformer implementation that does nothing.

Since:
  3.0
See Also:
  - Serialized Form

- ## Field Summary

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

- ## Method Summary

  Modifier and Type
  Method
  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`

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

  `andThen, compose`

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

  `apply`

- ## Field Details

  - ### INSTANCE

    public static final Transformer INSTANCE
    Singleton predicate instance

- ## Method Details

  - ### 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