Class Code

src/main/java/com/github/javafaker/Code.java:9–230

ISBN Rules : https://en.wikipedia.org/wiki/International_Standard_Book_Number

 * ISBN Rules : https://en.wikipedia.org/wiki/International_Standard_Book_Number
 */
public class Code {

    private final Faker faker;

    protected Code(Faker faker) {
        this.faker = faker;
    }

    /**
     * This can be overridden by specifying
     * <code>
     *     code:
     *       isbn_gs1: "some expression"
     * </code>
     * in the appropriate yml file.
     * @return a GS1 code for an ISBN13, currently is only 978 and 979
     */
    public String isbnGs1() {
        return faker.regexify("978|979");
    }
    /**
     * This can be overridden by specifying
     * <code>
     *     code:
     *       isbn_group: "some expression"
     * </code>
     * in the appropriate yml file.
     * @return an ISBN group number
     */
    public String isbnGroup() {
        return faker.regexify("[0-1]");
    }

    /**
     * This can be overridden by specifying
     * <code>
     *     code:
     *       isbn_registrant: "some expression"
     * </code>
     * in the appropriate yml file.
     * @return an ISBN registrant 'element' with separator
     */
    public String isbnRegistrant() {
        int ct = faker.random().nextInt(6) + 1;
        switch (ct) {
            case 6:
                return faker.number().numberBetween(0,1) + faker.number().digit() + "-" + faker.number().digits(6);
            case 5:
                return faker.number().numberBetween(200,699) + "-" + faker.number().digits(5);
            case 4:
                return faker.number().numberBetween(7000,8499) + "-" + faker.number().digits(4);
            case 3:
                return faker.number().numberBetween(85000,89999) + "-" + faker.number().digits(3);
            case 2:
                return faker.number().numberBetween(900000,949999) + "-" + faker.number().digits(2);
            case 1:
                return faker.number().numberBetween(9500000,9999999) + "-" + faker.number().digits(1);
            default: