Application.java

package factj.test;

import factj.FactJ;

public class Application {
	public static void main(String[] args) {
		PersonFabricator.load();
		System.out.println(FactJ.build(Person.class));
		System.out.println(FactJ.build(Person.class));
	}
}

Output.txt

Person [id=1, name=Diego, [email protected]]
Person [id=2, name=Diego, [email protected]]

PersonFabricator.java

package factj.test;

import static factj.DSL.field;
import static factj.DSL.sequence;
import factj.Fabricator;
import factj.decorators.SequenceDecorator.Sequence;

public abstract class PersonFabricator extends Fabricator {
	static {
		Sequence emailSequence = new Sequence() {
			@Override
			public Object generate(int count) {
				return "user" + count + "@company.com";
			}
		};

		fabricate(Person.class,
				sequence("id"),
				field("name", "Diego"),
				sequence("email", emailSequence));
	}

	public static void load() {
	}
}