/// <summary>
/// Gets the integer mapping for a remote node id.
/// </summary>
/// <param name="mappingType">Type of the mapping.</param>
/// <param name="remoteId">The remote node id.</param>
/// <returns>The mapping; 0 if not found.</returns>
public uint GetLocalIntegerIdMapping(string mappingType, NodeId remoteId)
{
lock (m_lock)
{
// check if no mappings defined.
if (m_mappingSets == null)
{
return(0);
}
if (mappingType == null)
{
mappingType = String.Empty;
}
// check for an existing mapping.
NodeIdMappingSet mappingSet = null;
if (!m_mappingSets.TryGetValue(mappingType, out mappingSet))
{
return(0);
}
// search for a existing integer id.
NodeId localId = GetLocalNodeId(remoteId);
if (mappingSet.Mappings != null)
{
for (int ii = 0; ii < mappingSet.Mappings.Count; ii++)
{
NodeIdMapping mapping = mappingSet.Mappings[ii];
if (localId == mapping.NodeId)
{
return(mapping.IntegerId);
}
}
}
// not found.
return(0);
}
}
/// <summary>
/// Updates an integer id mapping set.
/// </summary>
public void UpdateMappingSet(NodeIdMappingSet mappingSet)
{
lock (m_lock)
{
if (m_mappingSets == null)
{
m_mappingSets = new Dictionary <string, NodeIdMappingSet>();
}
string mappingType = mappingSet.MappingType;
if (mappingType == null)
{
mappingType = String.Empty;
}
m_mappingSets[mappingType] = mappingSet;
}
}
/// <summary>
/// Replaces the mapping set. Adds it if it does not exist.
/// </summary>
public void ReplaceMappingSet(NodeIdMappingSet mappingSet)
{
if (this.MappingSets != null)
{
for (int ii = 0; ii < this.MappingSets.Count; ii++)
{
if (this.MappingSets[ii].MappingType == mappingSet.MappingType)
{
this.MappingSets[ii] = mappingSet;
return;
}
}
}
if (this.MappingSets == null)
{
this.MappingSets = new NodeIdMappingSetCollection();
}
this.MappingSets.Add(mappingSet);
}
/// <summary>
/// Returns the mapping set. Creates an empty one if it does not exist.
/// </summary>
public NodeIdMappingSet GetMappingSet(string mappingType)
{
NodeIdMappingSet mappingSet = new NodeIdMappingSet();
mappingSet.MappingType = mappingType;
if (this.MappingSets != null)
{
for (int ii = 0; ii < this.MappingSets.Count; ii++)
{
if (this.MappingSets[ii].MappingType == mappingType)
{
mappingSet.Mappings = this.MappingSets[ii].Mappings;
return(mappingSet);
}
}
}
mappingSet.Mappings = new NodeIdMappingCollection();
return(mappingSet);
}
/// <summary>
/// Initializes the mapper.
/// </summary>
public void Initialize(Session session, ComAe2ProxyConfiguration configuration)
{
base.Initialize(session, configuration);
m_session = session;
// discard the table.
m_eventTypes = new NodeIdDictionary <AeEventCategory>();
m_categories = new Dictionary <uint, AeEventCategory>();
m_attributes = new Dictionary <uint, AeEventAttribute>();
// load the well known types from an embedded resource.
IndexWellKnownTypes();
// browse the server for additional types.
if (!configuration.UseOnlyBuiltInTypes)
{
IndexTypesFromServer(Opc.Ua.ObjectTypeIds.BaseEventType, OpcRcw.Ae.Constants.SIMPLE_EVENT);
}
// check for existing category mapping.
NodeIdMappingSet mappingSet = configuration.GetMappingSet("EventCategories");
// update mappings.
UpdateEventTypeMappings(mappingSet);
// update configuration.
configuration.ReplaceMappingSet(mappingSet);
// check for existing attribute mapping.
mappingSet = configuration.GetMappingSet("EventAttributes");
// update mappings.
UpdateEventAttributeMappings(mappingSet);
// update configuration.
configuration.ReplaceMappingSet(mappingSet);
}
/// <summary>
/// Assigns a locally unique numeric id to each event type.
/// </summary>
private void UpdateEventAttributeMappings(NodeIdMappingSet mappingSet)
{
NodeIdMappingCollection mappingsToKeep = new NodeIdMappingCollection();
// collect all unique declarations.
List <AeEventAttribute> list = new List <AeEventAttribute>();
foreach (AeEventCategory type in m_eventTypes.Values)
{
for (int ii = 0; ii < type.Attributes.Count; ii++)
{
AeEventAttribute declaration = type.Attributes[ii];
// only variables can be attributes.
if (declaration.NodeClass != NodeClass.Variable)
{
continue;
}
// need to link attributes to any attributes that they override.
AeEventCategory subType = type;
AeEventCategory superType = null;
while (subType != null)
{
if (NodeId.IsNull(subType.SuperTypeId) || subType.TypeId == subType.SuperTypeId || subType.SuperTypeId == Opc.Ua.ObjectTypeIds.BaseObjectType)
{
list.Add(declaration);
break;
}
if (!m_eventTypes.TryGetValue(subType.SuperTypeId, out superType))
{
break;
}
for (int jj = 0; jj < superType.Attributes.Count; jj++)
{
if (superType.Attributes[jj].BrowsePathDisplayText == declaration.BrowsePathDisplayText)
{
declaration.OverriddenDeclaration = superType.Attributes[jj];
declaration = declaration.OverriddenDeclaration;
break;
}
}
subType = superType;
}
}
}
// look up ids for all attributes in master list.
Dictionary <uint, AeEventAttribute> attributes = new Dictionary <uint, AeEventAttribute>();
for (int ii = 0; ii < list.Count; ii++)
{
AeEventAttribute declaration = list[ii];
for (int jj = 0; jj < mappingSet.Mappings.Count; jj++)
{
NodeIdMapping mapping = mappingSet.Mappings[jj];
try
{
// browse display paths always use local namespa indexes.
if (declaration.BrowsePathDisplayText != mapping.BrowePath)
{
continue;
}
// need to convert the cached type id to a remote id.
NodeId localId = NodeId.Parse(mapping.NodeId);
NodeId remoteId = this.GetRemoteNodeId(localId);
if (declaration.RootTypeId != remoteId)
{
continue;
}
// must update the saved integer id.
if (!attributes.ContainsKey(mapping.IntegerId))
{
declaration.LocalId = mapping.IntegerId;
attributes[declaration.LocalId] = declaration;
mappingsToKeep.Add(mapping);
}
// must assign a new one if a duplicate found.
else
{
declaration.LocalId = 0;
}
}
catch (Exception)
{
// ignore invalid mappings.
}
}
}
// assign new ids.
uint nextId = 1;
for (int ii = 0; ii < list.Count; ii++)
{
AeEventAttribute declaration = list[ii];
if (declaration.LocalId == 0)
{
// find a unique id.
while (attributes.ContainsKey(nextId))
{
nextId++;
}
// assign the id.
declaration.LocalId = nextId;
attributes[declaration.LocalId] = declaration;
// save the mapping.
NodeIdMapping mapping = new NodeIdMapping();
mapping.IntegerId = nextId;
mapping.NodeId = this.GetLocalNodeId(declaration.RootTypeId).ToString();
mapping.BrowePath = declaration.BrowsePathDisplayText;
mappingsToKeep.Add(mapping);
}
}
// update mapping set.
mappingSet.Mappings = mappingsToKeep;
m_attributes = attributes;
}
/// <summary>
/// Assigns a locally unique numeric id to each event type.
/// </summary>
private void UpdateEventTypeMappings(NodeIdMappingSet mappingSet)
{
NodeIdMappingCollection mappingsToKeep = new NodeIdMappingCollection();
Dictionary <uint, AeEventCategory> categories = new Dictionary <uint, AeEventCategory>();
for (int ii = 0; ii < mappingSet.Mappings.Count; ii++)
{
NodeIdMapping mapping = mappingSet.Mappings[ii];
try
{
// need to convert the cached type id to a remote id.
NodeId localId = NodeId.Parse(mapping.NodeId);
NodeId remoteId = this.GetRemoteNodeId(localId);
AeEventCategory eventType = null;
if (m_eventTypes.TryGetValue(remoteId, out eventType))
{
// check if the event already has an id.
if (eventType.LocalId == 0)
{
// must update the saved integer id.
if (!categories.ContainsKey(mapping.IntegerId))
{
eventType.LocalId = mapping.IntegerId;
categories[eventType.LocalId] = eventType;
mappingsToKeep.Add(mapping);
}
// must assign a new one if a duplicate found.
else
{
eventType.LocalId = 0;
}
}
}
}
catch (Exception)
{
// discard invalid mappings.
}
}
// assign ids to any types which do not have mappings.
uint nextId = 1;
foreach (AeEventCategory eventType in m_eventTypes.Values)
{
if (eventType.LocalId == 0)
{
// find a unique id.
while (categories.ContainsKey(nextId))
{
nextId++;
}
// assign the id.
eventType.LocalId = nextId;
categories[eventType.LocalId] = eventType;
// save the mapping.
NodeIdMapping mapping = new NodeIdMapping();
mapping.IntegerId = nextId;
mapping.NodeId = this.GetLocalNodeId(eventType.TypeId).ToString();
mappingsToKeep.Add(mapping);
}
}
// update mappings.
mappingSet.Mappings = mappingsToKeep;
m_categories = categories;
}