private static string TableNamespace(TableXsd tableXsd)
{
if (tableXsd == null)
{
throw new ArgumentNullException(nameof(tableXsd));
}
return(tableXsd.Schema.TargetNamespace);
}
public TableXml(TableXsd tableXsd, FileInfo path, FileIndex fileIndex, int tableNo)
: base(path, fileIndex, tableXsd.Schema, TableNamespace(tableXsd), TableNamespaceLocation(TableNamespace(tableXsd), tableNo))
{
path.Refresh();
if (path.Exists == false)
{
// We will now use Document from the base class.
return;
}
// We will now void to load large XML documents (> 32MB) into
// the memory because this can make an OutOfMemoryException
// Therefore we will set the Document to NULL and use
// a XmlTextWriter instead.
long maxSizeForUsingXmlDocument = 1024 * 1024 * 32;
if (path.Length < maxSizeForUsingXmlDocument)
{
try
{
using (var fileStream = new FileStream(path.FullName, FileMode.Open, FileAccess.ReadWrite, FileShare.Read))
{
using (var xmlReader = XmlReader.Create(fileStream, CreateXmlReaderSettings(base.Schema, ValidationType.None)))
{
Document.Load(xmlReader);
xmlReader.Close();
}
}
return;
}
catch (OutOfMemoryException)
{
Document = null;
GC.Collect();
GC.WaitForPendingFinalizers();
}
}
Document = null;
_shadowFile = new FileInfo($"{path.FullName}.shadow");
try
{
DeleteFile(_shadowFile);
_shadowFileStream = new FileStream(_shadowFile.FullName, FileMode.CreateNew, FileAccess.ReadWrite, FileShare.Read);
_xmlTextWriter = new XmlTextWriter(_shadowFileStream, Encoding.UTF8)
{
Formatting = Formatting.Indented
};
using (var sourceFileStream = new FileStream(path.FullName, FileMode.Open, FileAccess.Read, FileShare.Read))
{
using (var xmlReader = XmlReader.Create(sourceFileStream, CreateXmlReaderSettings(base.Schema, ValidationType.None)))
{
while (xmlReader.Read())
{
switch (xmlReader.NodeType)
{
case XmlNodeType.Element:
_xmlTextWriter.WriteStartElement(xmlReader.Prefix, xmlReader.LocalName, xmlReader.NamespaceURI);
_xmlTextWriter.WriteAttributes(xmlReader, true);
if (xmlReader.IsEmptyElement)
{
_xmlTextWriter.WriteEndElement();
}
break;
case XmlNodeType.Text:
_xmlTextWriter.WriteString(xmlReader.Value);
break;
case XmlNodeType.Whitespace:
case XmlNodeType.SignificantWhitespace:
_xmlTextWriter.WriteWhitespace(xmlReader.Value);
break;
case XmlNodeType.CDATA:
_xmlTextWriter.WriteCData(xmlReader.Value);
break;
case XmlNodeType.EntityReference:
_xmlTextWriter.WriteEntityRef(xmlReader.Name);
break;
case XmlNodeType.XmlDeclaration:
case XmlNodeType.ProcessingInstruction:
_xmlTextWriter.WriteProcessingInstruction(xmlReader.Name, xmlReader.Value);
break;
case XmlNodeType.DocumentType:
_xmlTextWriter.WriteDocType(xmlReader.Name, xmlReader.GetAttribute("PUBLIC"), xmlReader.GetAttribute("SYSTEM"), xmlReader.Value);
break;
case XmlNodeType.Comment:
_xmlTextWriter.WriteComment(xmlReader.Value);
break;
case XmlNodeType.EndElement:
if (string.Compare(xmlReader.LocalName, "table", StringComparison.Ordinal) == 0)
{
break;
}
_xmlTextWriter.WriteFullEndElement();
break;
}
}
}
}
}
catch
{
_xmlTextWriter?.Close();
_shadowFileStream?.Close();
_shadowFileStream?.Dispose();
DeleteFile(_shadowFile);
throw;
}
}