Example of Pattern Factory with Java EE 7. A recruiter should choose among developers depending on their English level

Developer

import javax.enterprise.context.Dependent;

@EnglishLevel(EnglishLevel.Type.Intermediate)
@Dependent
public class Developer implements Person {
	
    @Override
    public String readResume() {
        return "I could be your man";
    }

}

DeveloperWithC1

import javax.enterprise.context.Dependent;

@EnglishLevel(EnglishLevel.Type.Advanced)
@Dependent
public class DeveloperWithC1 extends Developer {

	@Override
	public String readResume() {
		return "I'm your man";
	}
}

EnglishLevel

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

import javax.inject.Qualifier;

@Qualifier
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.FIELD, ElementType.TYPE})
public @interface EnglishLevel {
	Type value();
	enum Type { Intermediate, Advanced, Proficiency};
}

EnglishLevelLiteral

import javax.enterprise.util.AnnotationLiteral;

public class EnglishLevelLiteral extends AnnotationLiteral<EnglishLevel> implements EnglishLevel {
	private static final long serialVersionUID = 1L;

	private Type type;
	
	public EnglishLevelLiteral(Type type) {
		this.type = type;
	}

	@Override
	public Type value() {
		return type;
	}

}

Person

public interface Person {
    public String readResume();
}

PersonFactory

import javax.enterprise.inject.Any;
import javax.enterprise.inject.Instance;
import javax.inject.Inject;

public class PersonFactory {

	@Inject 
	@Any
	private Instance<Person> developers;

	/**
	 * Search among hundreds of resumes
	 */
	public Person getDeveloper(EnglishLevel.Type type) {
		EnglishLevelLiteral literal = new EnglishLevelLiteral(type);
		return developers.select(literal).get();
	}
	
}