Package org.apache.commons.collections4.functors

Class InstantiateTransformer<T>

java.lang.Object
org.apache.commons.collections4.functors.InstantiateTransformer<T>
All Implemented Interfaces:
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 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