ApplicationBinder 中泛型的 JAX-RS Bind 实现

Question

是否可以在 AbstractBinder 的实现中将 class 与类型参数绑定？

通用存储库class
public class Repository<T>{ ... }

服务class

public class AccountService{  

     Repository<User> repository;  

     @Inject  
     public AccountService(Repository<User> repository){  
        this.repository = repository;
     }

}

在活页夹中绑定通用存储库

public class ApplicationBinder extends AbstractBinder {

@Override
protected void configure() {  
      bind(Repository<User,Long>).to(Repository<User,Long>.class); <=== not working!
}

Answer 1

您可以使用TypeLiteral

Supports inline instantiation of objects that represent parameterized types with actual type parameters. An object that represents any parameterized type may be obtained by subclassing TypeLiteral.
TypeLiteral<List<String>> stringListType = new TypeLiteral<List<String>>() {};

而不是 bind，您需要使用 bindAsContract(TypeLiteral)，因为没有 bind 方法接受 TypeLiteral^[1].

bindAsContract(new TypeLiteral<Repository<User, Long>>(){});

^{[1] - 在 AbstractBinder 文档中查看更多信息。}

ApplicationBinder 中泛型的 JAX-RS Bind 实现

JAX-RS Bind implementation of generic type in ApplicationBinder

java

generics

jax-rs

jersey-2.0