/// <summary>
/// Creates an IFCFile object from an IFC XML file.
/// </summary>
/// <param name="path">The file path.</param>
/// <param name="schemaVersion">The schema version.</param>
/// <returns>The IFCFile.</returns>
static IFCFile CreateIFCFileFromIFCXML(string path, out IFCSchemaVersion schemaVersion)
{
IFCFile file = null;
string schemaName = null;
schemaVersion = IFCSchemaVersion.IFC2x3;
// This is an optional location to find the schema name - it may not be supplied.
using (XmlReader reader = XmlReader.Create(new StreamReader(path)))
{
reader.ReadToFollowing("doc:express");
reader.MoveToAttribute("schema_name");
schemaName = reader.Value.Replace(" ", "").Replace("\t", "").Replace("\r", "").Replace("\n", "");
}
// This is an alternate location compatible with some MAP ifcXML files.
if (string.IsNullOrEmpty(schemaName))
{
using (XmlReader reader = XmlReader.Create(new StreamReader(path)))
{
reader.ReadToFollowing("doc:iso_10303_28");
reader.MoveToAttribute("xmlns:schemaLocation");
int ifcLoc = reader.Value.IndexOf("IFC");
if (ifcLoc >= 0)
{
string tmpName = reader.Value.Substring(ifcLoc);
int ifcEndLoc = tmpName.IndexOf('/');
if (ifcEndLoc > 0)
{
schemaName = tmpName.Substring(0, ifcEndLoc);
}
}
}
}
// This checks to see if we have an unsupported IFC2X3_RC1 file.
if (string.IsNullOrEmpty(schemaName))
{
using (XmlReader reader = XmlReader.Create(new StreamReader(path)))
{
reader.ReadToFollowing("ex:iso_10303_28");
reader.MoveToAttribute("xmlns:ifc");
int ifcLoc = reader.Value.IndexOf("IFC");
if (ifcLoc >= 0)
{
schemaName = reader.Value.Substring(ifcLoc);
}
}
}
if (!string.IsNullOrEmpty(schemaName))
{
IFCFileModelOptions modelOptions = GetIFCFileModelOptions(schemaName, out schemaVersion);
file = IFCFile.Create(modelOptions);
}
if (file == null)
{
throw new InvalidOperationException("Can't determine XML file schema.");
}
return(file);
}
/// <summary>
/// Creates an IFCFile object from a standard IFC file.
/// </summary>
/// <param name="path">The file path.</param>
/// <param name="schemaVersion">The schema version.</param>
/// <returns>The IFCFile.</returns>
static IFCFile CreateIFCFileFromIFC(string path, out IFCSchemaVersion schemaVersion)
{
string schemaString = string.Empty;
string schemaName = null;
using (StreamReader sr = new StreamReader(path))
{
string schemaKeyword = "FILE_SCHEMA((";
bool found = false;
while (sr.Peek() >= 0)
{
string lineString = schemaString + sr.ReadLine();
lineString = lineString.Replace(" ", "").Replace("\t", "").Replace("\r", "").Replace("\n", "");
string[] schemaNames = lineString.Split(';');
for (int ii = 0; ii < schemaNames.Length; ii++)
{
schemaString = schemaNames[ii];
int idx = schemaString.IndexOf(schemaKeyword);
int schemaIdxStart = -1;
int schemaIdxEnd = -1;
if (idx != -1)
{
idx += schemaKeyword.Length;
if (idx < schemaString.Length && schemaString[idx] == '\'')
{
schemaIdxStart = ++idx;
for (; idx < schemaString.Length; idx++)
{
if (schemaString[idx] == '\'')
{
schemaIdxEnd = idx;
found = true;
break;
}
}
}
}
if (found)
{
schemaName = schemaString.Substring(schemaIdxStart, schemaIdxEnd - schemaIdxStart);
break;
}
}
if (found)
{
break;
}
}
}
IFCFile file = null;
schemaVersion = IFCSchemaVersion.IFC2x3;
if (!string.IsNullOrEmpty(schemaName))
{
IFCFileModelOptions modelOptions = GetIFCFileModelOptions(schemaName, out schemaVersion);
file = IFCFile.Create(modelOptions);
}
return(file);
}
