#region Disclaimer / License
// Copyright (C) 2010, Jackie Ng
// http://trac.osgeo.org/mapguide/wiki/maestro, jumpinjackie@gmail.com
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
//
#endregion
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace OSGeo.MapGuide.MaestroAPI.Resource.Conversion
{
///
/// Performs schematic upgrades of resources
///
public interface IResourceConverter
{
///
/// Converts the resource to the specified version
///
/// The resource.
/// The target version.
///
IResource Convert(IResource resource, Version targetVersion);
}
///
/// Performs schematic upgrades of resources
///
///
/// This example shows how to convert a given Layer Definition to a specific version
///
///
///
///
public class ResourceObjectConverter : IResourceConverter
{
///
/// Converts the resource to the specified version
///
/// The resource.
/// The target version.
///
public IResource Convert(IResource resource, Version targetVersion)
{
//How does this work? If source and target versions are known, it means the classes
//that represent them are also known and we just serialize from the source type to xml
//and deserialize that xml to the target type, with any unsupported bits falling by the
//wayside in the process, and any new bits flubbed with default values as part of deserialization
var resVer = resource.GetResourceTypeDescriptor().Version;
var dstVer = string.Format("{0}.{1}.{2}", targetVersion.Major, targetVersion.Minor, targetVersion.Build); //NOXLATE
var dstXsd = resource.ValidatingSchema.Replace(resVer, dstVer);
using (var sr = ResourceTypeRegistry.Serialize(resource))
{
using (var str = new StreamReader(sr))
{
var xml = new StringBuilder(str.ReadToEnd());
xml.Replace(resource.ValidatingSchema, dstXsd);
xml.Replace("version=\"" + resVer, "version=\"" + dstVer); //NOXLATE
var convRes = ResourceTypeRegistry.Deserialize(xml.ToString());
convRes.CurrentConnection = resource.CurrentConnection;
convRes.ResourceID = resource.ResourceID;
return convRes;
}
}
}
}
}