小编Cip*_*ion的帖子

我有以下代码

public abstract class BaseAdapter<T, V extends BaseAdapter.ViewHolder> extends ArrayAdapter<T> {
    public BaseAdapter(Context context, int resource, Collection<T> collection) {
        // typical constructor logic
    }

    // some other custom defined methods

    public static class ViewHolder {
        // custom defined logic
    }
}

public class ModelAdapter extends BaseAdapter<Model, ModelAdapter.ModelViewHolder> {
    public ModelAdapter(Context context, int resource, Collection<Model> collection) {
       super(context, resource, collection);
       // typical constructor logic
    }

    public static class ModelViewHolder extends ViewHolder {
        // custom defined logic
    }
}

BaseAdapter和ModelAdapter位于单独的文件中.问题是我在尝试定义ModelAdapter时遇到编译错误:在当前上下文中无法访问 ModelViewHolder …

我正在使用 spring boot (1.3.4.RELEASE) 并且有一个关于新的 @AliasFor 注释在 4.2 中引入 spring 框架的问题

考虑以下注释：

看法

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.TYPE)
@Component
public @interface View {
    String name() default "view";
}

合成的

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.TYPE)
@View
public @interface Composite {
    @AliasFor(annotation = View.class, attribute = "name")
    String value() default "composite";
}

然后我们注释一个简单的类如下

@Composite(value = "model")
public class Model {
}

运行以下代码时

ConfigurableApplicationContext context = SpringApplication.run(App.class, args);
String[] beanNames = context.getBeanNamesForAnnotation(View.class);
for (String beanName : beanNames) {
    View annotationOnBean = context.findAnnotationOnBean(beanName, View.class);
    System.out.println(annotationOnBean.name());
}

我期待输出是model，但它的观点 …