com.tsg.techsupportmvc.dao.KnowledgeBaseDaoDbImpl.java Source code

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Here is the source code for com.tsg.techsupportmvc.dao.KnowledgeBaseDaoDbImpl.java

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package com.tsg.techsupportmvc.dao;

import com.tsg.techsupportmvc.dto.KnowledgeBaseArticle;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.dao.EmptyResultDataAccessException;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

/**
 *
 * @author apprentice
 */
public class KnowledgeBaseDaoDbImpl implements KnowledgeBaseDao {

    private static final String SQL_INSERT_ARTICLE = "INSERT INTO `knowledgeBase` (`userId_FK`, `title`, `dateSubmitted`, `articleBody`) values (?, ?, ?, ?)";

    private static final String SQL_SELECT_ALL_ARTICLES = "SELECT k.*, u.displayName FROM `knowledgeBase` as k JOIN `users` AS u ON k.userID_FK = u.userId";

    private static final String SQL_DELETE_ARTICLE = "DELETE FROM `knowledgeBase` WHERE `articleId` = ?";

    private static final String SQL_UPDATE_ARTICLE = "UPDATE `knowledgeBase` SET `userId_FK` = ?, `title` = ?, `dateSubmitted` = ?, `articleBody` = ? WHERE `articleId` = ?";

    private static final String SQL_SELECT_ARTICLE = "SELECT k.*, u.displayName FROM `knowledgeBase` as k JOIN `users` AS u ON k.userID_FK = u.userId WHERE `articleId` = ?";

    private JdbcTemplate jdbcTemplate;

    @Autowired
    public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
        this.jdbcTemplate = jdbcTemplate;
    }

    @Override
    @Transactional(propagation = Propagation.REQUIRED, readOnly = false)
    public KnowledgeBaseArticle addArticle(KnowledgeBaseArticle article) {

        jdbcTemplate.update(SQL_INSERT_ARTICLE, article.getUserId_FK(), article.getTitle(),
                article.getSubmittedDate(), article.getArticleBody());

        article.setArticleId(jdbcTemplate.queryForObject("SELECT LAST_INSERT_ID()", Integer.class));

        return article;
    }

    @Override
    public void removeArticle(int id) {

        jdbcTemplate.update(SQL_DELETE_ARTICLE, id);

    }

    @Override
    public void updateArticle(KnowledgeBaseArticle article) {

        jdbcTemplate.update(SQL_UPDATE_ARTICLE, article.getUserId_FK(), article.getTitle(),
                article.getSubmittedDate(), article.getArticleBody(), article.getArticleId());

    }

    @Override
    public List<KnowledgeBaseArticle> getAllArticles() {
        return jdbcTemplate.query(SQL_SELECT_ALL_ARTICLES, new ArticleMapper());
    }

    @Override
    public KnowledgeBaseArticle getById(int id) {

        try {

            return jdbcTemplate.queryForObject(SQL_SELECT_ARTICLE, new ArticleMapper(), id);

        } catch (EmptyResultDataAccessException e) {

            return null;

        }
    }

    private static final class ArticleMapper implements RowMapper<KnowledgeBaseArticle> {

        @Override
        public KnowledgeBaseArticle mapRow(ResultSet rs, int i) throws SQLException {

            KnowledgeBaseArticle article = new KnowledgeBaseArticle();
            article.setArticleId(rs.getInt("articleId"));
            article.setTitle(rs.getString("title"));
            article.setUserId_FK(rs.getString("userId_FK"));
            article.setDisplayName(rs.getString("displayName"));
            article.setSubmittedDate(rs.getString("dateSubmitted"));
            article.setArticleBody(rs.getString("articleBody"));

            return article;

        }

    }
}