package edu.educacionit;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
import org.springframework.stereotype.Component;

@Configuration
@ComponentScan({"edu.educacionit"})
class AppConfig {

    @Bean
    public static PropertySourcesPlaceholderConfigurer get() {
        return new PropertySourcesPlaceholderConfigurer();
    }
}

@Component
class Dependencia {
    public Dependencia() {
        System.out.println("Dependencia ...");
    }
    public void mostrarFuncionamiento() {
        System.out.println("Dependencia funcionando");
    }
}

@Component("AI")
class AutoInstanciable {

    private Dependencia dependencia;

    @Autowired
    public AutoInstanciable(Dependencia dependencia) {
        this.dependencia = dependencia;
    }

    public AutoInstanciable() {
        System.out.println("Se instancia a traves del mecanismo de spring");
    }

    public void probar() {
        System.out.println("Probando...");
        this.dependencia.mostrarFuncionamiento();
    }
}

public class App
{
    public static void main( String[] args )
    {
        ApplicationContext appContext =
                new AnnotationConfigApplicationContext(AppConfig.class);

        AutoInstanciable ai = appContext.getBean("AI", AutoInstanciable.class);
        ai.probar();
    }
}