get class from generic type

Question

how can I call .class Or how can I get class from following generic type

 headerMap.put("accept", MediaType.APPLICATION_JSON_VALUE);
     ResponseEntity<PaginationResponse<Category>> response =
     restClient.getResource(url, headerMap, **PaginationResponse<Category>.class**);
     LOGGER.info("Method getAllCategories() - END");

It shows error

This is something missing from Java, called Reification. – Pierre Mar 15 '16 at 10:16 — Pierre, Mar 15 '16 at 10:16

score 1 · Answer 1 · edited May 23 '17 at 11:50

1

As far as I know the information is not avaiable at runtime. But perhaps, you can use some ideas from Get generic type of class at runtime.

edited May 23 '17 at 11:50

Community

1
1

answered Mar 15 '16 at 10:14

Shear Plane

124
8

score 1 · Answer 2 · edited Mar 15 '16 at 11:40

1

No, you cannot.

The generic type T is not kept at runtime because of Type Erasure.

However, if you still want to do it

public class Foo<T> 
{
    private Class<T> type;

    public Foo(Class<T> type) { 
        this.type = type; 
    }
}

edited Mar 15 '16 at 11:40

Shear Plane

124
8

answered Mar 15 '16 at 10:51

Rahul

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score 0 · Answer 3 · answered Mar 15 '16 at 12:31

0

I used this solution for generic type class explanation And Spring implementation is here for Rest Template

answered Mar 15 '16 at 12:31

dsk

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get class from generic type

3 Answers3