org.apache.commons.collections4.functors

Class InstantiateTransformer<T>

java.lang.Object

org.apache.commons.collections4.functors.InstantiateTransformer<T>

All Implemented Interfaces:

java.io.Serializable, Transformer<java.lang.Class<? extends T>,T>

public class InstantiateTransformer<T>
extends java.lang.Object
implements Transformer<java.lang.Class<? extends T>,T>, java.io.Serializable

Transformer implementation that creates a new object instance by reflection.

Since:

3.0

Version:

$Id: InstantiateTransformer.java 1477839 2013-04-30 21:32:47Z tn $

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static Transformer<java.lang.Class<?>,?>	NO_ARG_INSTANCE Singleton instance that uses the no arg constructor

Constructor Summary

Constructors

Constructor and Description
InstantiateTransformer(java.lang.Class<?>[] paramTypes, java.lang.Object[] args) Constructor that performs no validation.

Method Summary

Methods

Modifier and Type	Method and Description
static <T> Transformer<java.lang.Class<? extends T>,T>	instantiateTransformer() Get a typed no-arg instance.
static <T> Transformer<java.lang.Class<? extends T>,T>	instantiateTransformer(java.lang.Class<?>[] paramTypes, java.lang.Object[] args) Transformer method that performs validation.
T	transform(java.lang.Class<? extends T> input) Transforms the input Class object to a result by instantiation.

Methods inherited from class java.lang.Object

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

Field Detail

NO_ARG_INSTANCE

public static final Transformer<java.lang.Class<?>,?> NO_ARG_INSTANCE

Singleton instance that uses the no arg constructor

Constructor Detail

InstantiateTransformer

public InstantiateTransformer(java.lang.Class<?>[] paramTypes,
                      java.lang.Object[] args)

Constructor that performs no validation. Use instantiateTransformer if you want that.

Note: from 4.0, the input parameters will be cloned

Parameters:

paramTypes - the constructor parameter types

args - the constructor arguments

Method Detail

instantiateTransformer

public static <T> Transformer<java.lang.Class<? extends T>,T> instantiateTransformer()

Get a typed no-arg instance.

Type Parameters:

T - the type of the objects to be created

Returns:

Transformer, T>

instantiateTransformer

public static <T> Transformer<java.lang.Class<? extends T>,T> instantiateTransformer(java.lang.Class<?>[] paramTypes,
                                                                     java.lang.Object[] args)

Transformer method that performs validation.

Type Parameters:

T - the type of the objects to be created

Parameters:

paramTypes - the constructor parameter types

args - the constructor arguments

Returns:

an instantiate transformer

transform

public T transform(java.lang.Class<? extends T> input)

Transforms the input Class object to a result by instantiation.

Specified by:

transform in interface Transformer<java.lang.Class<? extends T>,T>

Parameters:

input - the input object to transform

Returns:

the transformed result