package de.vanitasvitae.imi.codes;

import java.util.regex.Pattern;

/**
 * Sub-class of {@link CharSequence}, which can only represent char sequences of length 3 from the alphabet [a-zA-Z0-9].
 */
public class StudyNumber extends BoundedCharSequence {

    private static final Pattern REGEX = Pattern.compile(InputValidator.REGEX_ALPHABET + "{3}");

    /**
     * Create a new {@link StudyNumber} sequence. The constructor checks, whether the input String is of length 3 and from
     * the alphabet [a-zA-Z9-0].
     *
     * @param value input string
     * @throws InvalidOptionException if the input doesn't match the regex
     */
    protected StudyNumber(String value) throws InvalidOptionException {
        super(REGEX, value);
    }
}