net.sf.collections15.functors.transformer
Class FactoryTransformer<I,O>

java.lang.Object
  net.sf.collections15.functors.transformer.FactoryTransformer<I,O>

All Implemented Interfaces:

java.io.Serializable, Transformer<I,O>

public class FactoryTransformer<I,O>
extends java.lang.Object
implements Transformer<I,O>, java.io.Serializable

Transformer implementation whose transform(I) method uses a Factory to create the returned output object.

Since:

Collections15 1.0

Author:

Stephen Colebourne, Chris Lambrou (port to Java 5.0)

See Also:

Serialized Form

Constructor Summary

protected

FactoryTransformer(Factory<O> factory) Creates a new instance that uses the specified Factory to create the transform output objects.

Method Summary

Factory<O>	getFactory() Returns the wrapped factory.
static <I,O> Transformer<I,O>	getInstance(Factory<O> factory) Factory method that performs validation.
O	transform(I input) Transforms the input by ignoring the input and returning a new object created by the wrapped Factory.

Methods inherited from class java.lang.Object

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

Constructor Detail

FactoryTransformer

protected FactoryTransformer(Factory<O> factory)

Creates a new instance that uses the specified Factory to create the transform output objects.

Parameters:

factory - The Factory used to create the transform output objects.

Throws:

java.lang.IllegalArgumentException - Thrown if factory is null.

Method Detail

getInstance

public static <I,O> Transformer<I,O> getInstance(Factory<O> factory)

Factory method that performs validation.

Parameters:

factory - the factory to call, not null

Returns:

the factory transformer

Throws:

java.lang.IllegalArgumentException - if the factory is null

transform

public O transform(I input)

Transforms the input by ignoring the input and returning a new object created by the wrapped Factory.

Specified by:

transform in interface Transformer<I,O>

Parameters:

input - The input object, which is ignored.

Returns:

A new object created using the wrapped Factory.

getFactory

public Factory<O> getFactory()

Returns the wrapped factory.

Returns:

The wrapped factory.

Since:

Collections15 1.0