/**
* This file is part of Graylog.
*
* Graylog 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
* (at your option) any later version.
*
* Graylog 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 Graylog. If not, see <http://www.gnu.org/licenses/>.
*/
package org.graylog2.database.validators;
import org.graylog2.plugin.database.validators.ValidationResult;
import org.graylog2.plugin.database.validators.Validator;
public class OptionalStringValidator implements Validator {
/**
* Validates: Object is null or of type String.
*
* @param value The object to check
* @return validation result
*/
@Override
public ValidationResult validate(Object value) {
if (value == null || value instanceof String) {
return new ValidationResult.ValidationPassed();
} else {
return new ValidationResult.ValidationFailed("Value \"" + value + "\" is not a valid string!");
}
}
}