org.apache.commons.collections4.functors

Class InvokerTransformer<I,O>

java.lang.Object

org.apache.commons.collections4.functors.InvokerTransformer<I,O>

All Implemented Interfaces:

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

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

Transformer implementation that creates a new object instance by reflection.

Since:

3.0

Version:

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

See Also:

Serialized Form

Constructor Summary

Constructors

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

Method Summary

Methods

Modifier and Type	Method and Description
static <I,O> Transformer<I,O>	invokerTransformer(java.lang.String methodName) Gets an instance of this transformer calling a specific method with no arguments.
static <I,O> Transformer<I,O>	invokerTransformer(java.lang.String methodName, java.lang.Class<?>[] paramTypes, java.lang.Object[] args) Gets an instance of this transformer calling a specific method with specific values.
O	transform(java.lang.Object input) Transforms the input to result by invoking a method on the input.

Methods inherited from class java.lang.Object

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

Constructor Detail

InvokerTransformer

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

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

Note: from 4.0, the input parameters will be cloned

Parameters:

methodName - the method to call

paramTypes - the constructor parameter types

args - the constructor arguments

Method Detail

invokerTransformer

public static <I,O> Transformer<I,O> invokerTransformer(java.lang.String methodName)

Gets an instance of this transformer calling a specific method with no arguments.

Type Parameters:

I - the input type

O - the output type

Parameters:

methodName - the method name to call

Returns:

an invoker transformer

Since:

3.1

invokerTransformer

public static <I,O> Transformer<I,O> invokerTransformer(java.lang.String methodName,
                                        java.lang.Class<?>[] paramTypes,
                                        java.lang.Object[] args)

Gets an instance of this transformer calling a specific method with specific values.

Type Parameters:

I - the input type

O - the output type

Parameters:

methodName - the method name to call

paramTypes - the parameter types of the method

args - the arguments to pass to the method

Returns:

an invoker transformer

transform

public O transform(java.lang.Object input)

Transforms the input to result by invoking a method on the input.

Specified by:

transform in interface Transformer<I,O>

Parameters:

input - the input object to transform

Returns:

the transformed result, null if null input