OptionalWrapper.java

/**
 * This file is part of alf.io.
 *
 * alf.io 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.
 *
 * alf.io 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 alf.io.  If not, see <http://www.gnu.org/licenses/>.
 */
package alfio.util;

import org.springframework.dao.EmptyResultDataAccessException;

import java.util.Optional;
import java.util.function.Supplier;

public class OptionalWrapper {

    public static <T> Optional<T> optionally(Supplier<T> s) {
        try {
            return Optional.ofNullable(s.get());
        } catch (EmptyResultDataAccessException | IllegalArgumentException e) {
            return Optional.empty();
        }
    }
}