Mercurial > hg > LightPIT / file revision

 /*

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  * Copyright 2018 Mike Becker. All rights reserved.

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 package de.uapcore.lightpit.dao.postgres;

 import de.uapcore.lightpit.dao.ProjectDao;

 import de.uapcore.lightpit.entities.Project;

 import de.uapcore.lightpit.entities.User;

 import java.sql.Connection;

 import java.sql.PreparedStatement;

 import java.sql.ResultSet;

 import java.sql.SQLException;

 import java.util.ArrayList;

 import java.util.List;

 import java.util.Objects;

 import static de.uapcore.lightpit.dao.Functions.setForeignKeyOrNull;

 import static de.uapcore.lightpit.dao.Functions.setStringOrNull;

 public final class PGProjectDao implements ProjectDao {

     private final PreparedStatement insert, update, list, find;

     public PGProjectDao(Connection connection) throws SQLException {

         list = connection.prepareStatement(

                 "select projectid, name, description, repourl, " +

                         "userid, username, lastname, givenname, mail " +

                         "from lpit_project " +

                         "left join lpit_user owner on lpit_project.owner = owner.userid " +

                         "order by name");

         find = connection.prepareStatement(

                 "select projectid, name, description, repourl, " +

                         "userid, username, lastname, givenname, mail " +

                         "from lpit_project " +

                         "left join lpit_user owner on lpit_project.owner = owner.userid " +

                         "where projectid = ?");

         insert = connection.prepareStatement(

                 "insert into lpit_project (name, description, repourl, owner) values (?, ?, ?, ?)"

         );

         update = connection.prepareStatement(

                 "update lpit_project set name = ?, description = ?, repourl = ?, owner = ? where projectid = ?"

         );

     }

     public Project mapColumns(ResultSet result) throws SQLException {

         final var proj = new Project(result.getInt("projectid"));

         proj.setName(result.getString("name"));

         proj.setDescription(result.getString("description"));

         proj.setRepoUrl(result.getString("repourl"));

         final int id = result.getInt("userid");

         if (id != 0) {

             final var user = new User(id);

             user.setUsername(result.getString("username"));

             user.setGivenname(result.getString("givenname"));

             user.setLastname(result.getString("lastname"));

             user.setMail(result.getString("mail"));

             proj.setOwner(user);

         }

         return proj;

     }

     @Override

     public void save(Project instance) throws SQLException {

         Objects.requireNonNull(instance.getName());

         insert.setString(1, instance.getName());

         setStringOrNull(insert, 2, instance.getDescription());

         setStringOrNull(insert, 3, instance.getRepoUrl());

         setForeignKeyOrNull(insert, 4, instance.getOwner(), User::getId);

         insert.executeUpdate();

     }

     @Override

     public boolean update(Project instance) throws SQLException {

         if (instance.getId() < 0) return false;

         Objects.requireNonNull(instance.getName());

         update.setString(1, instance.getName());

         setStringOrNull(update, 2, instance.getDescription());

         setStringOrNull(update, 3, instance.getRepoUrl());

         setForeignKeyOrNull(update, 4, instance.getOwner(), User::getId);

         update.setInt(5, instance.getId());

         return update.executeUpdate() > 0;

     }

     @Override

     public List<Project> list() throws SQLException {

         List<Project> projects = new ArrayList<>();

         try (var result = list.executeQuery()) {

             while (result.next()) {

                 projects.add(mapColumns(result));

             }

         }

         return projects;

     }

     @Override

     public Project find(int id) throws SQLException {

         find.setInt(1, id);

         try (var result = find.executeQuery()) {

             if (result.next()) {

                 return mapColumns(result);

             } else {

                 return null;

             }

         }

     }

 }