org.apache.commons.collections.functors

## Class ClosureTransformer

- java.lang.Object
- - org.apache.commons.collections.functors.ClosureTransformer

- All Implemented Interfaces:
    Serializable, Transformer

      public class ClosureTransformer
      extends Object
      implements Transformer, Serializable

  Transformer implementation that calls a Closure using the input object and then returns the input.
  Since:
    Commons Collections 3.0
  Version:
    $Revision: 646777 $ $Date: 2008-04-10 14:33:15 +0200 (Thu, 10 Apr 2008) $
  Author:
    Stephen Colebourne
  See Also:
    Serialized Form

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `ClosureTransformer(Closure closure)` Constructor that performs no validation.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `Closure` | `getClosure()` Gets the closure.
    `static Transformer` | `getInstance(Closure closure)` Factory method that performs validation.
    `Object` | `transform(Object input)` Transforms the input to result by executing a closure.

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

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

- - ### Constructor Detail

    - #### ClosureTransformer

          public ClosureTransformer(Closure closure)

      Constructor that performs no validation. Use `getInstance` if you want that.
      Parameters:
        `closure` - the closure to call, not null

  - ### Method Detail

    - #### getInstance

          public static Transformer getInstance(Closure closure)

      Factory method that performs validation.
      Parameters:
        `closure` - the closure to call, not null
      Returns:
        the `closure` transformer
      Throws:
        `IllegalArgumentException` - if the closure is null

    - #### transform

          public Object transform(Object input)

      Transforms the input to result by executing a closure.
      Specified by:
        `transform` in interface `Transformer`
      Parameters:
        `input` - the input object to transform
      Returns:
        the transformed result

    - #### getClosure

          public Closure getClosure()

      Gets the closure.
      Returns:
        the closure
      Since:
        Commons Collections 3.1

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