Package org.springframework.core

Class ParameterizedTypeReference<T>

java.lang.Object
org.springframework.core.ParameterizedTypeReference<T>
Type Parameters:
T - the referenced type
public abstract class ParameterizedTypeReference<T> extends Object
The purpose of this class is to enable capturing and passing a generic Type. In order to capture the generic type and retain it at runtime, you need to create a subclass (ideally as anonymous inline class) as follows: 
 ParameterizedTypeReference<List<String>> typeRef = new ParameterizedTypeReference<List<String>>() {};

The resulting typeRef instance can then be used to obtain a Type instance that carries the captured parameterized type information at runtime. For more information on "super type tokens" see the link to Neal Gafter's blog post.

Since:
3.2
Author:
Arjen Poutsma, Rossen Stoyanchev
See Also:

  • Constructor Details

    • ParameterizedTypeReference

      protected ParameterizedTypeReference()

  • Method Details

    • getType

      public Type getType()

    • equals

      public boolean equals(@Nullable Object other)
      Overrides:
      equals in class Object

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object

    • toString

      public String toString()
      Overrides:
      toString in class Object

    • forType

      public static <T> ParameterizedTypeReference<T> forType(Type type)
      Build a ParameterizedTypeReference wrapping the given type.
      Parameters:
      type - a generic type (possibly obtained via reflection, e.g. from Method.getGenericReturnType())
      Returns:
      a corresponding reference which may be passed into ParameterizedTypeReference-accepting methods
      Since:
      4.3.12