Examples with the Options provider from Datafaker

DataFakerOptionsProvider.jsh

//DEPS net.datafaker:datafaker:1.9.0

/** 
 * Pour exécuter avec JBang : jbang DataFakerOptionsProvider.jsh
 * Pour exécuter sous JShell :
 * jshell --class-path .;.\lib\datafaker-1.9.0.jar
 * /open DataFakerOptionsProvider.jsh
 */
import net.datafaker.Faker;
import net.datafaker.providers.base.Options;

import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.stream.IntStream;

enum DaysOfWeek {
    MONDAY,
    TUESDAY,
    WEDNESDAY,
    FRIDAY,
    SATURDAY,
    SUNDAY
};

// Instanciation d'un objet Faker pour pouvoir générer des valeurs aléatoires
Faker faker = new Faker();

Options options = faker.options();
System.out.println("Choosing randomly between several options specified as a String");
IntStream.range(0, 10).forEach(i -> System.out.println("My Favorite day is (iteration #" + i + ") : " 
                                + options.option("Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday")));
System.out.println();
System.out.println("Choosing randomly between several options specified by an Enumeration");
IntStream.range(0, 10).forEach(i -> System.out.println("My Favorite day is (iteration #" + i + ") : " + options.option(DaysOfWeek.class)));
System.out.println();
System.out.println("Choosing randomly an option from a List or an Array");
List<String> daysOfWeekAsList = List.of("Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday");
IntStream.range(0, 10).forEach(i -> System.out.println("My Favorite day is (iteration #" + i + ") : " + options.nextElement(daysOfWeekAsList)));
System.out.println();

DaysOfWeek[] daysOfWeekAsArray = DaysOfWeek.values();
IntStream.range(0, 10).forEach(i -> System.out.println("My Favorite day is (iteration #" + i + ") : " + options.nextElement(daysOfWeekAsArray)));

for(int i = 0 ; i < 4 ; i++) {
    System.out.println();
    Set<DaysOfWeek> fourDaysOfWeek = options.subset(4,daysOfWeekAsArray);
    System.out.println("A set of four random days among seven : " + fourDaysOfWeek.stream().map(DaysOfWeek::toString).collect(Collectors.joining(", ")));
}