/*
 * eGov suite of products aim to improve the internal efficiency,transparency,
 * accountability and the service delivery of the government  organizations.
 *
 *  Copyright (C) 2016  eGovernments Foundation
 *
 *  The updated version of eGov suite of products as by eGovernments Foundation
 *  is available at http://www.egovernments.org
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program. If not, see http://www.gnu.org/licenses/ or
 *  http://www.gnu.org/licenses/gpl.html .
 *
 *  In addition to the terms of the GPL license to be adhered to in using this
 *  program, the following additional terms are to be complied with:
 *
 *      1) All versions of this program, verbatim or modified must carry this
 *         Legal Notice.
 *
 *      2) Any misrepresentation of the origin of the material is prohibited. It
 *         is required that all modified versions of this material be marked in
 *         reasonable ways as different from the original version.
 *
 *      3) This license does not grant any rights to any user of the program
 *         with regards to rights under trademark law for use of the trade names
 *         or trademarks of eGovernments Foundation.
 *
 *  In case of any queries, you can reach eGovernments Foundation at contact@egovernments.org.
 */

package org.egov.infra.persistence.validator;

import org.egov.infra.persistence.validator.annotation.OptionalPattern;

import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import java.util.regex.Pattern;

public class OptionalPatternValidator implements ConstraintValidator<OptionalPattern, Object> {

    private OptionalPattern optionalPattern;

    @Override
    public void initialize(final OptionalPattern optionalPattern) {
        this.optionalPattern = optionalPattern;
    }

    @Override
    public boolean isValid(final Object value, final ConstraintValidatorContext arg1) {
        if (value == null || org.apache.commons.lang.StringUtils.isBlank(String.valueOf(value)))
            return true;
        return Pattern.compile(optionalPattern.regex(), optionalPattern.flags()).matcher(String.valueOf(value))
                .matches();
    }

}
