//======================================================================
// Construction
/// <summary>
/// Initializes the object with the specifed COM server.
/// </summary>
internal Browser(OpcCom.Hda.Server server, IOPCHDA_Browser browser, BrowseFilter[] filters, ResultID[] results)
{
if (browser == null)
{
throw new ArgumentNullException("browser");
}
// save the server object that created the browser.
m_server = server;
// save the COM server (released in Dispose()).
m_browser = browser;
// save only the filters that were accepted.
if (filters != null)
{
ArrayList validFilters = new ArrayList();
for (int ii = 0; ii < filters.Length; ii++)
{
if (results[ii].Succeeded())
{
validFilters.Add(filters[ii]);
}
}
m_filters = new BrowseFilterCollection(validFilters);
}
}
public virtual void Dispose()
{
lock (this)
{
this.m_server = null;
OpcCom.Interop.ReleaseServer(this.m_browser);
this.m_browser = null;
}
}
internal Browser(OpcCom.Hda.Server server, IOPCHDA_Browser browser, BrowseFilter[] filters, ResultID[] results)
{
if (browser == null)
{
throw new ArgumentNullException("browser");
}
this.m_server = server;
this.m_browser = browser;
if (filters != null)
{
ArrayList collection = new ArrayList();
for (int i = 0; i < filters.Length; i++)
{
if (results[i].Succeeded())
{
collection.Add(filters[i]);
}
}
this.m_filters = new BrowseFilterCollection(collection);
}
}
//======================================================================
// IFactory
/// <summary>
/// Creates a new instance of the server.
/// </summary>
public override Opc.IServer CreateInstance(Opc.URL url, Opc.ConnectData connectData)
{
object comServer = Factory.Connect(url, connectData);
if (comServer == null)
{
return(null);
}
OpcCom.Server server = null;
System.Type interfaceType = null;
try
{
// DA
if (url.Scheme == Opc.UrlScheme.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 (typeof(OpcRcw.Da.IOPCBrowse).IsInstanceOfType(comServer) && typeof(OpcRcw.Da.IOPCItemIO).IsInstanceOfType(comServer))
{
server = new OpcCom.Da.Server(url, comServer);
}
// DA 2.XX
else if (typeof(OpcRcw.Da.IOPCItemProperties).IsInstanceOfType(comServer))
{
server = new OpcCom.Da20.Server(url, comServer);
}
else
{
interfaceType = typeof(OpcRcw.Da.IOPCItemProperties);
throw new NotSupportedException();
}
}
// AE
else if (url.Scheme == Opc.UrlScheme.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 OpcCom.Ae.Server(url, comServer);
}
// HDA
else if (url.Scheme == Opc.UrlScheme.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 OpcCom.Hda.Server(url, comServer);
}
// DX
else if (url.Scheme == Opc.UrlScheme.DX)
{
// Verify that it is a DX server.
if (!typeof(OpcRcw.Dx.IOPCConfiguration).IsInstanceOfType(comServer))
{
interfaceType = typeof(OpcRcw.Dx.IOPCConfiguration);
throw new NotSupportedException();
}
server = new OpcCom.Dx.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)
{
OpcCom.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)
{
OpcCom.Interop.ReleaseServer(server);
server = null;
throw e;
}
// initialize the wrapper object.
if (server != null)
{
server.Initialize(url, connectData);
}
return(server);
}
