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:

Neal Gafter on Super Type Tokens

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ParameterizedTypeReference()

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object other)
static <T> ParameterizedTypeReference<T>	forType(Type type) Build a ParameterizedTypeReference wrapping the given type.
Type	getType()
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ParameterizedTypeReference

protected ParameterizedTypeReference()

Method Detail

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