IDatabaseConnection.cs

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// SmartAPI - .Net programmatic access to RedDot servers
//  
// Copyright (C) 2013 erminas GbR
// 
// 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 3 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, see <http://www.gnu.org/licenses/>.

using System;
using System.Xml;
using erminas.SmartAPI.CMS.ServerManagement;
using erminas.SmartAPI.Utils;

namespace erminas.SmartAPI.CMS.Project
{
    public interface IDatabaseConnection : IPartialRedDotObject, IProjectObject
    {
        string DatabaseName { get; }

        IDatabaseServer DatabaseServer { get; }

        string DescriptionInCurrentDisplayLanguage { get; }
    }

    internal class DatabaseConnection : PartialRedDotProjectObject, IDatabaseConnection
    {
        private string _databaseName;
        private DatabaseServer _databaseServer;
        private string _description;

        internal DatabaseConnection(IProject project, Guid guid) : base(project, guid)
        {
        }

        internal DatabaseConnection(IProject project, XmlElement xmlElement) : base(project, xmlElement)
        {
            LoadXml();
        }

        public string DatabaseName
        {
            get { return LazyLoad(ref _databaseName); }
        }

        public IDatabaseServer DatabaseServer
        {
            get { return LazyLoad(ref _databaseServer); }
        }

        public string DescriptionInCurrentDisplayLanguage
        {
            get { return LazyLoad(ref _description); }
        }

        protected override void LoadWholeObject()
        {
            LoadXml();
        }

        protected override XmlElement RetrieveWholeObject()
        {
            const string LOAD_DATABASE_CONNECTION = @"<DATABASE action=""load"" guid=""{0}""/>";
            XmlDocument xmlDoc = Project.ExecuteRQL(String.Format(LOAD_DATABASE_CONNECTION, Guid.ToRQLString()),
                                                    RqlType.SessionKeyInProject);
            XmlNodeList xmlNodes = xmlDoc.GetElementsByTagName("DATABASE");
            if (xmlNodes.Count != 1)
            {
                throw new ArgumentException("Could not find database connection with guid " + Guid.ToRQLString());
            }
            return (XmlElement) xmlNodes[0];
        }

        private void LoadXml()
        {
            InitIfPresent(ref _description, "description", x => x);
            InitIfPresent(ref _databaseServer, "databaseserverguid",
                          x => new DatabaseServer(Project.Session, GuidConvert(x)));
            InitIfPresent(ref _databaseName, "databasename", x => x);
        }
    }
}