private static MeshModelMetadata ReadFrom(Stream stream, IGuidGenerator fallbackGuidGenerator)
{
// Needed for later property validation
var hasGuid = false;
var hasName = false;
var hasPartCount = false;
var settings = new XmlReaderSettings
{
IgnoreComments = true,
IgnoreWhitespace = true,
IgnoreProcessingInstructions = true,
CloseInput = false,
NameTable = new NameTable()
};
using (var reader = XmlReader.Create(stream, settings))
{
var result = new MeshModelMetadata();
reader.MoveToElement();
while (reader.Read())
{
switch (reader.Name)
{
case "Guid":
result.Guid = Guid.ParseExact(reader.ReadString(), "N");
hasGuid = true;
break;
case "TriangulationHash":
result.TriangulationHash = Guid.ParseExact(reader.ReadString(), "N");
break;
case "Name":
result.Name = reader.ReadString();
hasName = true;
break;
case "PartCount":
result.PartCount = int.Parse(reader.ReadString(), System.Globalization.CultureInfo.InvariantCulture);
hasPartCount = true;
break;
case "FileVersion":
result.FileVersion = new Version(reader.ReadString());
break;
case "SourceFormat":
result.SourceFormat = reader.ReadString();
break;
case "Layer":
var layer = new List <string>();
while (reader.Read() && reader.NodeType != XmlNodeType.EndElement)
{
layer.Add(reader.ReadString());
}
result.Layer = layer.ToArray();
break;
case "SourceModels":
var sourceModels = new List <string>();
while (reader.Read() && reader.NodeType != XmlNodeType.EndElement)
{
sourceModels.Add(reader.ReadString());
}
result.SourceModels = sourceModels.ToArray();
break;
case "MeshValueEntries":
var entries = new List <MeshValueEntry>();
while (reader.Read() && reader.NodeType != XmlNodeType.EndElement)
{
if (reader.Name == "MeshValueEntry")
{
entries.Add(MeshValueEntry.Read(reader));
}
}
result.MeshValueEntries = entries.ToArray();
break;
}
}
// validation for mendatory properties since version 5.1.0.0 and missing Guid fallback for older versions
if (result.FileVersion != null && result.FileVersion >= new Version(5, 1, 0, 0))
{
if (!hasGuid)
{
throw new InvalidOperationException(MeshModelHelper.FormatResource <MeshModel>("InvalidFormatMissingProperty_ErrorText", "Guid"));
}
if (!hasName)
{
throw new InvalidOperationException(MeshModelHelper.FormatResource <MeshModel>("InvalidFormatMissingProperty_ErrorText", "Name"));
}
if (!hasPartCount)
{
throw new InvalidOperationException(MeshModelHelper.FormatResource <MeshModel>("InvalidFormatMissingProperty_ErrorText", "PartCount"));
}
}
else
{
if (!hasGuid)
{
result.Guid = fallbackGuidGenerator.CreateGuid();
}
}
return(result);
}
}
