Package org.apache.commons.collections4.functors

Class InstantiateTransformer<T>

java.lang.Object

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

Type Parameters:

T - the type of the input and result to the function.

All Implemented Interfaces:

Function<Class<? extends T>,T>, Transformer<Class<? extends T>,T>

public class InstantiateTransformer<T>
extends Object
implements Transformer<Class<? extends T>,T>

Transformer implementation that creates a new object instance by reflection.

WARNING: from v4.1 onwards this class will not be serializable anymore in order to prevent potential remote code execution exploits. Please refer to COLLECTIONS-580 for more details.

Since:

3.0

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
static <T> Transformer<Class<? extends T>,T>	instantiateTransformer()	Gets a typed no-arg instance.
static <T> Transformer<Class<? extends T>,T>	instantiateTransformer(Class<?>[] paramTypes, Object[] args)	Transformer method that performs validation.
T	transform(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

Methods inherited from interface java.util.function.Function

andThen, compose

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

apply

Constructor Details

InstantiateTransformer

public InstantiateTransformer(Class<?>[] paramTypes,
 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 Details

instantiateTransformer

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

Gets a typed no-arg instance.

Type Parameters:

T - the type of the objects to be created

Returns:

Transformer<Class<? extends T>, T>

instantiateTransformer

public static <T> Transformer<Class<? extends T>,T> instantiateTransformer(Class<?>[] paramTypes,
 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

Throws:

IllegalArgumentException - if paramTypes does not match args

transform

public T transform(Class<? extends T> input)

Transforms the input Class object to a result by instantiation.

Specified by:

transform in interface Transformer<Class<? extends T>,T>

Parameters:

input - the input object to transform

Returns:

the transformed result