/*
 * Hibernate Validator, declare and validate application constraints
 *
 * License: Apache License, Version 2.0
 * See the license.txt file in the root directory or <http://www.apache.org/licenses/LICENSE-2.0>.
 */
package org.hibernate.validator.internal.constraintvalidators.hv;

import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;

import org.hibernate.validator.constraints.EAN;

/**
 * Checks that a given character sequence (e.g. string) is a valid EAN barcode.
 *
 * @author Hardy Ferentschik
 */
public class EANValidator implements ConstraintValidator<EAN, CharSequence> {

	private int size;

	@Override
	public void initialize(EAN constraintAnnotation) {
		switch ( constraintAnnotation.type() ) {
			case EAN8: {
				size = 8;
				break;
			}
			case EAN13: {
				size = 13;
				break;
			}
		}
	}

	@Override
	public boolean isValid(CharSequence value, ConstraintValidatorContext context) {
		if ( value == null ) {
			return true;
		}
		int length = value.length();
		return length == size;
	}
}
