ru.mystamps.web.dao.impl.JdbcImageDataDao.java Source code

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Here is the source code for ru.mystamps.web.dao.impl.JdbcImageDataDao.java

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/*
 * Copyright (C) 2009-2017 Slava Semushin <slava.semushin@gmail.com>
 *
 * 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 2 of the License, or
 * (at your option) 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */
package ru.mystamps.web.dao.impl;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

import org.apache.commons.lang3.Validate;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.dao.EmptyResultDataAccessException;
import org.springframework.jdbc.core.namedparam.MapSqlParameterSource;
import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate;
import org.springframework.jdbc.support.GeneratedKeyHolder;
import org.springframework.jdbc.support.KeyHolder;

import lombok.RequiredArgsConstructor;

import ru.mystamps.web.dao.ImageDataDao;
import ru.mystamps.web.dao.dto.AddImageDataDbDto;
import ru.mystamps.web.dao.dto.DbImageDto;

@RequiredArgsConstructor
public class JdbcImageDataDao implements ImageDataDao {

    private final NamedParameterJdbcTemplate jdbcTemplate;

    @Value("${image_data.find_by_image_id}")
    private String findByImageIdSql;

    @Value("${image_data.add}")
    private String addImageDataSql;

    @Override
    public DbImageDto findByImageId(Integer imageId) {
        try {
            return jdbcTemplate.queryForObject(findByImageIdSql, Collections.singletonMap("image_id", imageId),
                    RowMappers::forDbImageDto);
        } catch (EmptyResultDataAccessException ignored) {
            return null;
        }
    }

    @Override
    public Integer add(AddImageDataDbDto imageData) {
        Map<String, Object> params = new HashMap<>();
        params.put("image_id", imageData.getImageId());
        params.put("content", imageData.getContent());

        KeyHolder holder = new GeneratedKeyHolder();

        int affected = jdbcTemplate.update(addImageDataSql, new MapSqlParameterSource(params), holder);

        Validate.validState(affected == 1, "Unexpected number of affected rows after creation of image's data: %d",
                affected);

        return Integer.valueOf(holder.getKey().intValue());
    }

}