package cruzgtug.example.guice;

import com.google.inject.AbstractModule;
import com.google.inject.Provides;
import com.google.inject.name.Named;

/**
 * Encapsulates all Guice bindings used by HelloExample
 * 
 * @author esmiley
 * 
 */
public class HelloModule extends AbstractModule {

 /**
  * This specifies what bindings this module provides
  */
	@Override
	protected void configure() {
		/*
		 * This tells Guice that whenever it sees a dependency on a Hello, it should
		 * satisfy the dependency using a HelloImpl.
		 */
		bind(Hello.class).to(HelloImpl.class);
	}
	

	/**
	 * If the @Provides method has a binding annotation like @PayPal or 
	 *      @Named("BusinessAddress"), Guice binds the annotated type. 
	 *       Dependencies can
	 *       be passed in as parameters to the method. The
	 *       injector will exercise the bindings for each of
	 *       these before invoking the method.
	 * 
	 * @return the string
	 */
	@Provides // this is a provider method
	@Named("HelloString") // this is a named string
	String provideHello() {
		return "Hello from Guice.";
	}
}