org.apache.commons.collections.functors
Class InvokerTransformer

java.lang.Object
  extended by org.apache.commons.collections.functors.InvokerTransformer
All Implemented Interfaces:
Serializable, Transformer

public class InvokerTransformer
extends Object
implements Transformer, Serializable

Transformer implementation that creates a new object instance by reflection.

Since:
Commons Collections 3.0
Version:
$Revision: 1.1.1.1 $ $Date: 2005/05/23 04:34:26 $
Author:
Matt Hall, John Watkinson, Stephen Colebourne
See Also:
Serialized Form

Constructor Summary
InvokerTransformer(String methodName, Class[] paramTypes, Object[] args)
          Constructor that performs no validation.
 
Method Summary
static Transformer getInstance(String methodName)
          Gets an instance of this transformer calling a specific method with no arguments.
static Transformer getInstance(String methodName, Class[] paramTypes, Object[] args)
          Gets an instance of this transformer calling a specific method with specific values.
 Object transform(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(String methodName,
                          Class[] paramTypes,
                          Object[] args)
Constructor that performs no validation. Use getInstance if you want that.

Parameters:
methodName - the method to call
paramTypes - the constructor parameter types, not cloned
args - the constructor arguments, not cloned
Method Detail

getInstance

public static Transformer getInstance(String methodName)
Gets an instance of this transformer calling a specific method with no arguments.

Parameters:
methodName - the method name to call
Returns:
an invoker transformer
Since:
Commons Collections 3.1

getInstance

public static Transformer getInstance(String methodName,
                                      Class[] paramTypes,
                                      Object[] args)
Gets an instance of this transformer calling a specific method with specific values.

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 Object transform(Object input)
Transforms the input to result by invoking a method on the input.

Specified by:
transform in interface Transformer
Parameters:
input - the input object to transform
Returns:
the transformed result, null if null input


Copyright © 2005-2005 Apache Software Foundation, Matt Hall, John Watkinson. All Rights Reserved.