001/*
002 * Stallion Core: A Modern Web Framework
003 *
004 * Copyright (C) 2015 - 2016 Stallion Software LLC.
005 *
006 * This program is free software: you can redistribute it and/or modify it under the terms of the
007 * GNU General Public License as published by the Free Software Foundation, either version 2 of
008 * the License, or (at your option) any later version. This program is distributed in the hope that
009 * it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
010 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
011 * License for more details. You should have received a copy of the GNU General Public License
012 * along with this program.  If not, see <http://www.gnu.org/licenses/gpl-2.0.html>.
013 *
014 *
015 *
016 */
017
018package io.stallion.dataAccess.db.converters;
019
020import io.stallion.utils.json.JSON;
021
022import java.util.HashSet;
023import java.util.Set;
024
025import static io.stallion.utils.Literals.*;
026
027
028public class JsonSetConverter implements JsonAttributeConverter<Set> {
029    @Override
030    public String convertToDatabaseColumn(Set attr) {
031        return JSON.stringify(attr);
032    }
033
034    @Override
035    public Set convertToEntityAttribute(String dbData) {
036        if (empty(dbData)) {
037            return set();
038        }
039        return JSON.parse(dbData, HashSet.class);
040    }
041}
042