Package org.apache.commons.collections.functors

Class InstantiateTransformer

java.lang.Object
org.apache.commons.collections.functors.InstantiateTransformer
All Implemented Interfaces:
Serializable, Transformer
public class InstantiateTransformer extends Object implements Transformer, Serializable
Transformer implementation that creates a new object instance by reflection.

WARNING: from v3.2.2 onwards this class will throw an UnsupportedOperationException when trying to serialize or de-serialize an instance to prevent potential remote code execution exploits.

In order to re-enable serialization support for InstantiateTransformer the following system property can be used (via -Dproperty=true): 

 org.apache.commons.collections.enableUnsafeSerialization
Since:
Commons Collections 3.0
Version:
$Revision: 1713845 $ $Date: 2015-11-11 15:02:16 +0100 (Wed, 11 Nov 2015) $
Author:
Stephen Colebourne
See Also:

  • Field Details

    • NO_ARG_INSTANCE

      public static final Transformer NO_ARG_INSTANCE
      Singleton instance that uses the no arg constructor

  • Constructor Details

    • InstantiateTransformer

      public InstantiateTransformer(Class[] paramTypes, Object[] args)
      Constructor that performs no validation. Use getInstance if you want that.
      Parameters:
      paramTypes - the constructor parameter types, not cloned
      args - the constructor arguments, not cloned

  • Method Details

    • getInstance

      public static Transformer getInstance(Class[] paramTypes, Object[] args)
      Transformer method that performs validation.
      Parameters:
      paramTypes - the constructor parameter types
      args - the constructor arguments
      Returns:
      an instantiate transformer

    • transform

      public Object transform(Object input)
      Transforms the input Class object to a result by instantiation.
      Specified by:
      transform in interface Transformer
      Parameters:
      input - the input object to transform
      Returns:
      the transformed result