an example demonstrating Spring's new `InjectionPoint` support

TestApplication.java

package com.example;

import org.springframework.beans.factory.InjectionPoint;
import org.springframework.beans.factory.ObjectFactory;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;

@Configuration
public class TestApplication {

    public static void main(String[] args) {
        new AnnotationConfigApplicationContext(TestApplication.class);
    }

    @Component
    public static class FooUser {

        private final Foo foo;

        public FooUser(Foo foo) {
            this.foo = foo;
        }
    }

    @Component
    public static class FooPrototypeUser {
        // if you have JSR 330 on the CLASSPATH you can use javax.inject.Provider instead
        private final ObjectFactory<Foo> fooObjectFactory;

        public FooPrototypeUser(ObjectFactory<Foo> fooObjectFactory) {
            this.fooObjectFactory = fooObjectFactory;
            for (int i = 0; i < 10; i++) {
                System.out.println(this.fooObjectFactory.getObject());
            }
        }
    }

    @Bean
    @Scope("prototype")
    Foo foo(InjectionPoint ip) {
        System.out.println(String.format("annotated element: %s, member: %s, field name: %s, method parameter: %s, annotated element: %s, declared type: %s",
                ip.getAnnotatedElement() != null ? ip.getAnnotatedElement().getClass().getName() : "",
                ip.getMember() != null ? ip.getMember().getName() : "",
                ip.getField() != null ? ip.getField().getName() : "",
                ip.getMethodParameter() != null ? ip.getMethodParameter().getParameterName() : "",
                ip.getAnnotatedElement() != null ? ip.getAnnotatedElement().getClass().getName() : "",
                ip.getDeclaredType() != null ? ip.getDeclaredType().getName() : ""));
        return new Foo();
    }
}

class Foo {
}

/*
prints the following, ten times with unique information:

annotated element: java.lang.reflect.Constructor, member: com.example.TestApplication$FooPrototypeUser, field name: , method parameter: fooObjectFactory, annotated element: java.lang.reflect.Constructor, declared type: org.springframework.beans.factory.ObjectFactory
..

*/