CRONValidator.java

/*
 * ProActive Parallel Suite(TM):
 * The Open Source library for parallel and distributed
 * Workflows & Scheduling, Orchestration, Cloud Automation
 * and Big Data Analysis on Enterprise Grids & Clouds.
 *
 * Copyright (c) 2007 - 2017 ActiveEon
 * Contact: contact@activeeon.com
 *
 * This library is free software: you can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License
 * as published by the Free Software Foundation: version 3 of
 * the License.
 *
 * 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 *
 * If needed, contact us to obtain a release under GPL Version 2 or 3
 * or a different license than the AGPL.
 */
package org.ow2.proactive.scheduler.common.job.factories.spi.model.validator;

import org.ow2.proactive.scheduler.common.job.factories.spi.model.ModelValidatorContext;
import org.ow2.proactive.scheduler.common.job.factories.spi.model.exceptions.ValidationException;

import it.sauronsoftware.cron4j.InvalidPatternException;
import it.sauronsoftware.cron4j.Predictor;


public class CRONValidator implements Validator<String> {

    public CRONValidator() {

    }

    @Override
    public String validate(String parameterValue, ModelValidatorContext context) throws ValidationException {
        try {
            (new Predictor(parameterValue)).nextMatchingDate();
        } catch (InvalidPatternException e) {
            throw new ValidationException("Expected value should be a valid cron expression, received '" +
                                          parameterValue + "', error: " + e.getMessage(), e);
        }

        return parameterValue;
    }
}