src/main/java/de/uapcore/lightpit/dao/postgres/PGVersionDao.java

/*
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 * Copyright 2018 Mike Becker. All rights reserved.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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package de.uapcore.lightpit.dao.postgres;

import de.uapcore.lightpit.dao.Functions;
import de.uapcore.lightpit.dao.VersionDao;
import de.uapcore.lightpit.entities.Project;
import de.uapcore.lightpit.entities.Version;
import de.uapcore.lightpit.entities.VersionStatus;

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

public final class PGVersionDao implements VersionDao {

    private final PreparedStatement insert, update, list, find, findByNode;

    public PGVersionDao(Connection connection) throws SQLException {
        final var query = "select versionid, project, name, node, ordinal, status from lpit_version";

        list = connection.prepareStatement(query + " where project = ? " +
                        "order by ordinal desc, lower(name) desc");
        find = connection.prepareStatement(query + " where versionid = ?");
        findByNode = connection.prepareStatement(query + " where project = ? and node = ?");

        insert = connection.prepareStatement(
                "insert into lpit_version (name, node, ordinal, status, project) values (?, ?, ?, ?::version_status, ?)"
        );
        update = connection.prepareStatement(
                "update lpit_version set name = ?, node = ?, ordinal = ?, status = ?::version_status where versionid = ?"
        );
    }

    private static Version mapColumns(ResultSet result) throws SQLException {
        final var version = new Version(result.getInt("versionid"));
        version.setName(result.getString("name"));
        version.setNode(result.getString("node"));
        version.setOrdinal(result.getInt("ordinal"));
        version.setStatus(VersionStatus.valueOf(result.getString("status")));
        return version;
    }

    private static int setFields(PreparedStatement stmt, Version instance) throws SQLException {
        int column = 0;
        stmt.setString(++column, instance.getName());
        stmt.setString(++column, instance.getNode());
        stmt.setInt(++column, instance.getOrdinal());
        stmt.setString(++column, instance.getStatus().name());
        return column;
    }

    @Override
    public void save(Version instance, Project project) throws SQLException {
        int column = setFields(insert, instance);
        insert.setInt(++column, project.getId());
        insert.executeUpdate();
    }

    @Override
    public boolean update(Version instance) throws SQLException {
        if (instance.getId() < 0) return false;
        int column = setFields(update, instance);
        update.setInt(++column, instance.getId());
        return update.executeUpdate() > 0;
    }

    @Override
    public List<Version> list(Project project) throws SQLException {
        list.setInt(1, project.getId());
        return Functions.list(list, PGVersionDao::mapColumns);
    }

    @Override
    public Version find(int id) throws SQLException {
        find.setInt(1, id);
        return Functions.find(find, PGVersionDao::mapColumns);
    }

    @Override
    public Version findByNode(Project project, String node) throws SQLException {
        findByNode.setInt(1, project.getId());
        findByNode.setString(2, node);;
        return Functions.find(findByNode, PGVersionDao::mapColumns);
    }
}