//======================================================================
// IOpcFactory
/// <summary>
/// Creates a new instance of the server.
/// </summary>
public override Technosoftware.DaAeHdaClient.IOpcServer CreateInstance(Technosoftware.DaAeHdaClient.OpcUrl url, Technosoftware.DaAeHdaClient.OpcConnectData connectData)
{
object comServer = Factory.Connect(url, connectData);
if (comServer == null)
{
return(null);
}
Technosoftware.DaAeHdaClient.Com.Server server = null;
Type interfaceType = null;
try
{
if (String.IsNullOrEmpty(url.Scheme))
{
throw new NotSupportedException(String.Format("The URL scheme '{0}' is not supported.", url.Scheme));
}
// DA
else if (url.Scheme == Technosoftware.DaAeHdaClient.OpcUrlScheme.DA)
{
// Verify that it is a DA server.
if (!typeof(OpcRcw.Da.IOPCServer).IsInstanceOfType(comServer))
{
interfaceType = typeof(OpcRcw.Da.IOPCServer);
throw new NotSupportedException();
}
// DA 3.00
if (!ForceDa20Usage && typeof(OpcRcw.Da.IOPCBrowse).IsInstanceOfType(comServer) && typeof(OpcRcw.Da.IOPCItemIO).IsInstanceOfType(comServer))
{
server = new Technosoftware.DaAeHdaClient.Com.Da.Server(url, comServer);
}
// DA 2.XX
else if (typeof(OpcRcw.Da.IOPCItemProperties).IsInstanceOfType(comServer))
{
server = new Technosoftware.DaAeHdaClient.Com.Da20.Server(url, comServer);
}
else
{
interfaceType = typeof(OpcRcw.Da.IOPCItemProperties);
throw new NotSupportedException();
}
}
// AE
else if (url.Scheme == Technosoftware.DaAeHdaClient.OpcUrlScheme.AE)
{
// Verify that it is a AE server.
if (!typeof(OpcRcw.Ae.IOPCEventServer).IsInstanceOfType(comServer))
{
interfaceType = typeof(OpcRcw.Ae.IOPCEventServer);
throw new NotSupportedException();
}
server = new Technosoftware.DaAeHdaClient.Com.Ae.Server(url, comServer);
}
// HDA
else if (url.Scheme == Technosoftware.DaAeHdaClient.OpcUrlScheme.HDA)
{
// Verify that it is a HDA server.
if (!typeof(OpcRcw.Hda.IOPCHDA_Server).IsInstanceOfType(comServer))
{
interfaceType = typeof(OpcRcw.Hda.IOPCHDA_Server);
throw new NotSupportedException();
}
server = new Technosoftware.DaAeHdaClient.Com.Hda.Server(url, comServer);
}
// All other specifications not supported yet.
else
{
throw new NotSupportedException(String.Format("The URL scheme '{0}' is not supported.", url.Scheme));
}
}
catch (NotSupportedException e)
{
Technosoftware.DaAeHdaClient.Utilities.Interop.ReleaseServer(server);
server = null;
if (interfaceType != null)
{
StringBuilder message = new StringBuilder();
message.AppendFormat("The COM server does not support the interface ");
message.AppendFormat("'{0}'.", interfaceType.FullName);
message.Append("\r\n\r\nThis problem could be caused by:\r\n");
message.Append("- incorrectly installed proxy/stubs.\r\n");
message.Append("- problems with the DCOM security settings.\r\n");
message.Append("- a personal firewall (sometimes activated by default).\r\n");
throw new NotSupportedException(message.ToString());
}
throw e;
}
catch (Exception e)
{
Technosoftware.DaAeHdaClient.Utilities.Interop.ReleaseServer(server);
server = null;
throw e;
}
// initialize the wrapper object.
if (server != null)
{
server.Initialize(url, connectData);
}
return(server);
}
/// <summary>
/// Connects to the specified COM server.
/// </summary>
public static object Connect(Technosoftware.DaAeHdaClient.OpcUrl url, Technosoftware.DaAeHdaClient.OpcConnectData connectData)
{
// parse path to find prog id and clsid.
string progID = url.Path;
string clsid = null;
int index = url.Path.IndexOf('/');
if (index >= 0)
{
progID = url.Path.Substring(0, index);
clsid = url.Path.Substring(index + 1);
}
// look up prog id if clsid not specified in the url.
Guid guid;
if (clsid == null)
{
// use OpcEnum to lookup the prog id.
guid = new ServerEnumerator().CLSIDFromProgID(progID, url.HostName, connectData);
// check if prog id is actually a clsid string.
if (guid == Guid.Empty)
{
try
{
guid = new Guid(progID);
}
catch
{
throw new OpcResultException(new OpcResult((int)OpcResult.CO_E_CLASSSTRING.Code, OpcResult.FuncCallType.SysFuncCall, null), String.Format("Could not connect to server {0}", progID));
}
}
}
// convert clsid string to a guid.
else
{
try
{
guid = new Guid(clsid);
}
catch
{
throw new OpcResultException(new OpcResult((int)OpcResult.CO_E_CLASSSTRING.Code, OpcResult.FuncCallType.SysFuncCall, null), String.Format("Could not connect to server {0}", progID));
}
}
// get the credentials.
OpcUserIdentity credentials = (connectData != null) ? connectData.UserIdentity : null;
// instantiate the server using CoCreateInstanceEx.
if (connectData == null || connectData.LicenseKey == null)
{
try
{
return(Technosoftware.DaAeHdaClient.Utilities.Interop.CreateInstance(guid, url.HostName, credentials));
}
catch (Exception e)
{
throw new OpcResultException(OpcResult.CO_E_CLASSSTRING, e.Message, e);
}
}
// instantiate the server using IClassFactory2.
else
{
try
{
return(null);
//return Technosoftware.DaAeHdaClient.Utilities.Interop.CreateInstanceWithLicenseKey(guid, url.HostName, credentials, connectData.LicenseKey);
}
catch (Exception e)
{
throw new OpcResultException(OpcResult.CO_E_CLASSSTRING, e.Message, e);
}
}
}
