使用基於@Inject字段的@Qualifier CDI

Question

我在使用EJB注入中的一種策略時遇到了CDI條件 注入的問題。

我的實際場景是

public class someManagedBean { 

    @Inject 
    @MyOwnQualifier(condition = someBean.getSomeCondition()) // not work because someBean is not already injected at this point 
    private BeanInterface myEJB; 

    @Inject 
    SomeBean someBean; 
} 

@Qualifier 
@Retention(RetentionPolicy.RUNTIME) 
@Target({ElementType.FIELD, ElementType.METHOD}) 
public @interface MyOwnQualifier { 
    SomeCondition condition(); 
} 

public class BeanInterfaceFactory { 
    @Produces 
    @MyOwnQualifier(condition = RoleCondition.ADMIN) 
    public BeanInterface getBeanInterfaceEJBImpl() { 
     return new BeanInterfaceEJBImpl(); 
    } 
} 

public enum RoleCondition { 
    ADMIN("ADMIN User"); 
} 

好，場景解釋。現在問題是我需要從someBean.getSomeCondition()獲得值 ，該值返回RoleCondition，這對我的@MyOwnQualifier是必需的。 但是此時someBean還沒有被CDI注入。

我如何使這條線路工作？

@Inject 
@MyOwnQualifier(condition = someBean.getSomeCondition()) // not work because some is not already injected at this point 
private BeanInterface myEJB; 

如何動態地注入使用基於另一種注射的屬性值預選賽豆的正確方法？

Answer 1

嘗試......

public class someManagedBean { 

    @Inject 
    @MyOwnQualifier 
    private BeanInterface myEJB; 
} 

@Qualifier 
@Retention(RetentionPolicy.RUNTIME) 
@Target({ElementType.FIELD, ElementType.METHOD}) 
public @interface MyOwnQualifier { 
    SomeCondition condition(); 
} 

public class BeanInterfaceFactory { 

    @Inject 
    SomeBean someBean 

    @Produces 
    @MyOwnQualifier 
    public BeanInterface getBeanInterfaceEJBImpl() { 
     if(someBean.getCondition()) {   
      return new BeanInterfaceEJBImpl(); 
     } else { 
      .... 
     } 
    } 
} 

public enum RoleCondition { 
    ADMIN("ADMIN User"); 
}