public void SaveNodestateCollectionAsNodeSet2(ISystemContext context, NodeStateCollection nsc, Stream stream,
bool filterSingleNodeIds, bool addRootItem = false, NodeState rootItem = null)
{
Opc.Ua.Export.UANodeSet nodeSet = new Opc.Ua.Export.UANodeSet();
nodeSet.LastModified = DateTime.UtcNow;
nodeSet.LastModifiedSpecified = true;
//
// Because the pain of so many wasted hours is so great:
// This function realizes a "write Nodeset2.xml" functionality, hwich
// seems to not work out-of-the-box by the existing OPC UA .dll
// (see "SaveNodestateCollectionAsNodeSet2tryout", .dll is an old version
// because auf .net Framework 4.7.2)
//
// This function "fakes" this export.
// Remark: the call of nodeSet.Export() shift the namespace-index.
// For multiple hours I tried to initialize the namespace-index better,
// or to figure out, which is the correct exported node for "AASROOT".
// It was not possible. So, a very bad hack is used.
//
//// nodeSet.NamespaceUris = new[] { "http://opcfoundation.org/UA/" };
//// var l = new List<string>();
//// l.Add("http://opcfoundation.org/UA/");
//// l.AddRange(NamespaceUris);
//// nodeSet.NamespaceUris = l.ToArray();
Utils.Trace(Utils.TraceMasks.Operation, "Exporting {0} nodes ..", nsc.Count);
int i = 0;
foreach (var n in nsc)
{
nodeSet.Export(context, n);
if ((i++) % 500 == 0)
{
Utils.Trace(Utils.TraceMasks.Operation, " .. exported already {0} nodes ..", nodeSet.Items.Length);
}
}
if (filterSingleNodeIds)
{
Utils.Trace(Utils.TraceMasks.Operation, "Filtering single node ids..");
// MIHO: There might be DOUBLE nodeIds in the the set!!!!!!!!!! WTF!!!!!!!!!!!!!
// Brutally eliminate them
var nodup = new List <Opc.Ua.Export.UANode>();
#if __old_implementation
foreach (var it in nodeSet.Items)
{
var found = false;
foreach (var it2 in nodup)
{
if (it.NodeId == it2.NodeId)
{
found = true;
}
}
if (found)
{
continue;
}
nodup.Add(it);
}
#else
var visitedNodeIds = new Dictionary <string, int>();
foreach (var it in nodeSet.Items)
{
if (visitedNodeIds.ContainsKey(it.NodeId))
{
continue;
}
visitedNodeIds.Add(it.NodeId, 1);
// try to remove double references
if (it.References != null)
{
var newrefs = new List <Opc.Ua.Export.Reference>();
foreach (var oldref in it.References)
{
// trivial
if (oldref == null)
{
continue;
}
// brute force check if already there
var found = false;
foreach (var nr in newrefs)
{
if (oldref.ReferenceType == nr.ReferenceType &&
oldref.IsForward == nr.IsForward &&
oldref.Value == nr.Value)
{
found = true;
break;
}
}
// if not, add
if (!found)
{
newrefs.Add(oldref);
}
}
// only change when necessary (reduce the impact)
if (it.References.Length != newrefs.Count)
{
it.References = newrefs.ToArray();
}
}
nodup.Add(it);
}
#endif
if (addRootItem)
{
// manually a root item
// lessons learnt: not required; do not use!
Utils.Trace(Utils.TraceMasks.Operation, "Adding root item..");
var rootItemSt = "ns=2;i=95"; // weird default
if (rootItem != null)
{
// Bad hack, apoligizes
var ni = new NodeId(
value: rootItem.NodeId.Identifier,
namespaceIndex: (ushort)((rootItem.NodeId.NamespaceIndex) - 1));
rootItemSt = ni.Format();
}
var ri = new Opc.Ua.Export.UAObject()
{
BrowseName = "Objects",
DisplayName = new[] {
new Opc.Ua.Export.LocalizedText()
{
Locale = "en", Value = "Objects"
}
},
NodeId = "ns=0;i=85",
References = new[]
{
//// It would have been nice to use symbols, but this did not work;
//// Opc.Ua.ReferenceTypeIds.HierarchicalReferences.Format() -> "ns=2;i=95"
//// Opc.Ua.ReferenceTypeIds.HasTypeDefinition.Format() -> FoldersType!! */ /* "i=68" ??
new Opc.Ua.Export.Reference()
{
ReferenceType = "i=33", Value = rootItemSt
},
new Opc.Ua.Export.Reference()
{
ReferenceType = "i=40",
Value = "i=61"
}
},
};
nodup.Add(ri);
}
nodeSet.Items = nodup.ToArray();
}
//
// write
//
Utils.Trace(Utils.TraceMasks.Operation, "Writing stream ..");
nodeSet.Write(stream);
}
