net.bhira.sample.api.dao.ContactInfoDaoImpl.java Source code

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Here is the source code for net.bhira.sample.api.dao.ContactInfoDaoImpl.java

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/**
 * The MIT License (MIT)
 *
 * Copyright (c) 2014 Baldeep Hira
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package net.bhira.sample.api.dao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.List;

import javax.sql.DataSource;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.PreparedStatementCreator;
import org.springframework.jdbc.support.GeneratedKeyHolder;
import org.springframework.jdbc.support.KeyHolder;
import org.springframework.stereotype.Repository;

import net.bhira.sample.api.jdbc.ContactInfoRowMapper;
import net.bhira.sample.model.ContactInfo;

/**
 * Implementation for ContactInfo DAO. It implements CRUD operations for
 * {@link net.bhira.sample.model.ContactInfo}.
 * 
 * @author Baldeep Hira
 */
@Repository("contactInfoDao")
public class ContactInfoDaoImpl implements ContactInfoDao {

    /**
     * private singleton instance of the SLF4J logger for this class.
     */
    private static final Logger LOG = LoggerFactory.getLogger(ContactInfoDaoImpl.class);

    private static final String SQL_LOAD_BY_ID = "select * from contactinfo where id = ?";
    private static final String SQL_INSERT = "insert into contactinfo (phone,fax,email,website) values (?,?,?,?)";
    private static final String SQL_UPDATE = "update contactinfo set phone = ?, fax = ?, email = ?, website = ? where id = ?";
    private static final String SQL_DELETE = "delete from contactinfo where id = ?";

    @Autowired
    DataSource dataSource;

    @Autowired
    JdbcTemplate jdbcTemplate;

    /**
     * @see net.bhira.sample.api.dao.ContactInfoDao#load(long)
     */
    @Override
    public ContactInfo load(long contactInfoId) {
        List<ContactInfo> list = jdbcTemplate.query(SQL_LOAD_BY_ID, new Object[] { contactInfoId },
                new ContactInfoRowMapper());
        int count = (list == null) ? 0 : list.size();
        LOG.debug("loaded contactInfo, count = {}, id = {}", count, contactInfoId);
        return (count == 0) ? null : list.get(0);
    }

    /**
     * @see net.bhira.sample.api.dao.ContactInfoDao#save(net.bhira.sample.model.ContactInfo)
     */
    @Override
    public void save(ContactInfo contactInfo) {
        if (contactInfo == null) {
            return;
        }

        if (contactInfo.isNew()) {
            // for new address, use SQL insert statement

            KeyHolder keyHolder = new GeneratedKeyHolder();
            int count = jdbcTemplate.update(new PreparedStatementCreator() {
                public PreparedStatement createPreparedStatement(Connection connection) throws SQLException {
                    PreparedStatement pstmt = connection.prepareStatement(SQL_INSERT,
                            Statement.RETURN_GENERATED_KEYS);
                    pstmt.setString(1, contactInfo.getPhone());
                    pstmt.setString(2, contactInfo.getFax());
                    pstmt.setString(3, contactInfo.getEmail());
                    pstmt.setString(4, contactInfo.getWebsite());
                    return pstmt;
                }
            }, keyHolder);

            // fetch the newly created auto-increment ID
            contactInfo.setId(keyHolder.getKey().longValue());
            LOG.debug("inserted contactInfo, count = {}, id = {}", count, contactInfo.getId());

        } else {
            // for existing address, construct the SQL update statement
            int count = jdbcTemplate.update(SQL_UPDATE, new Object[] { contactInfo.getPhone(), contactInfo.getFax(),
                    contactInfo.getEmail(), contactInfo.getWebsite(), contactInfo.getId() });
            LOG.debug("updated contactInfo, count = {}, id = {}", count, contactInfo.getId());
        }
    }

    /**
     * @see net.bhira.sample.api.dao.ContactInfoDao#delete(long)
     */
    @Override
    public boolean delete(long contactInfoId) {
        int count = jdbcTemplate.update(SQL_DELETE, new Object[] { contactInfoId });
        LOG.debug("deleted contactInfo, count = {}, id = {}", count, contactInfoId);
        return (count > 0);
    }

}