/// <summary>
/// Creates a new browser object with a set of filters.
/// </summary>
/// <param name="context">The system context to use.</param>
/// <param name="view">The view which may restrict the set of references/nodes found.</param>
/// <param name="referenceType">The type of references being followed.</param>
/// <param name="includeSubtypes">Whether subtypes of the reference type are followed.</param>
/// <param name="browseDirection">Which way the references are being followed.</param>
/// <param name="browseName">The browse name of a specific target (used when translating browse paths).</param>
/// <param name="additionalReferences">Any additional references that should be included.</param>
/// <param name="internalOnly">If true the browser should not making blocking calls to external systems.</param>
/// <param name="itemId">The item id.</param>
/// <param name="namespaceIndex">Index of the namespace.</param>
public DaElementBrowser(
ISystemContext context,
ViewDescription view,
NodeId referenceType,
bool includeSubtypes,
BrowseDirection browseDirection,
QualifiedName browseName,
IEnumerable<IReference> additionalReferences,
bool internalOnly,
string itemId,
ushort namespaceIndex)
:
base(
context,
view,
referenceType,
includeSubtypes,
browseDirection,
browseName,
additionalReferences,
internalOnly)
{
m_itemId = itemId;
m_namespaceIndex = namespaceIndex;
m_stage = Stage.Begin;
}
/// <summary>
/// Creates a new browser object with a set of filters.
/// </summary>
public NodeBrowser(
ISystemContext context,
ViewDescription view,
NodeId referenceType,
bool includeSubtypes,
BrowseDirection browseDirection,
QualifiedName browseName,
IEnumerable<IReference> additionalReferences,
bool internalOnly)
{
m_context = context;
m_view = view;
m_referenceType = referenceType;
m_includeSubtypes = includeSubtypes;
m_browseDirection = browseDirection;
m_browseName = browseName;
m_internalOnly = internalOnly;
m_references = new List<IReference>();
m_index = 0;
// add any additional references if they meet the criteria.
if (additionalReferences != null)
{
foreach (IReference reference in additionalReferences)
{
if (IsRequired(reference.ReferenceTypeId, reference.IsInverse))
{
m_references.Add(reference);
}
}
}
}
/// <summary>
/// Creates a new browser object with a set of filters.
/// </summary>
public NodeBrowser(
ISystemContext context,
ViewDescription view,
NodeId referenceType,
bool includeSubtypes,
BrowseDirection browseDirection,
QualifiedName browseName,
IEnumerable <IReference> additionalReferences,
bool internalOnly)
{
m_context = context;
m_view = view;
m_referenceType = referenceType;
m_includeSubtypes = includeSubtypes;
m_browseDirection = browseDirection;
m_browseName = browseName;
m_internalOnly = internalOnly;
m_references = new List <IReference>();
m_index = 0;
// add any additional references if they meet the criteria.
if (additionalReferences != null)
{
foreach (IReference reference in additionalReferences)
{
if (IsRequired(reference.ReferenceTypeId, reference.IsInverse))
{
m_references.Add(reference);
}
}
}
}
/// <summary>
/// Invokes the QueryFirst service.
/// </summary>
public virtual ResponseHeader QueryFirst(
RequestHeader requestHeader,
ViewDescription view,
NodeTypeDescriptionCollection nodeTypes,
ContentFilter filter,
uint maxDataSetsToReturn,
uint maxReferencesToReturn,
out QueryDataSetCollection queryDataSets,
out byte[] continuationPoint,
out ParsingResultCollection parsingResults,
out DiagnosticInfoCollection diagnosticInfos,
out ContentFilterResult filterResult)
{
queryDataSets = null;
continuationPoint = null;
parsingResults = null;
diagnosticInfos = null;
filterResult = null;
ValidateRequest(requestHeader);
// Insert implementation.
return(CreateResponse(requestHeader, StatusCodes.BadServiceUnsupported));
}
/// <summary>
/// Creates a new browser object with a set of filters.
/// </summary>
public AreaBrowser(
ISystemContext context,
ViewDescription view,
NodeId referenceType,
bool includeSubtypes,
BrowseDirection browseDirection,
QualifiedName browseName,
IEnumerable<IReference> additionalReferences,
bool internalOnly,
AreaState area)
:
base(
context,
view,
referenceType,
includeSubtypes,
browseDirection,
browseName,
additionalReferences,
internalOnly)
{
m_stage = Stage.Begin;
if (area != null)
{
m_area = AreaState.GetDirectory(context, area.NodeId);
m_isRoot = area.IsRoot;
}
}
/// <summary>
/// Creates a new browser object with a set of filters.
/// </summary>
public Browser(
ISystemContext context,
ViewDescription view,
NodeId referenceType,
bool includeSubtypes,
BrowseDirection browseDirection,
QualifiedName browseName,
IEnumerable<IReference> additionalReferences,
bool internalOnly,
Opc.Ua.Client.Session client,
NamespaceMapper mapper,
NodeState source,
NodeId rootId)
:
base(
context,
view,
referenceType,
includeSubtypes,
browseDirection,
browseName,
additionalReferences,
internalOnly)
{
m_client = client;
m_mapper = mapper;
m_source = source;
m_rootId = rootId;
m_stage = Stage.Begin;
}
/// <summary>
/// Determines whether a node id is a valid view id.
/// </summary>
/// <param name="description">The description.</param>
/// <returns>
/// <c>true</c> if the specified description is valid; otherwise, <c>false</c>.
/// </returns>
public bool IsValid(ViewDescription description)
{
if (ViewDescription.IsDefault(description))
{
return(true);
}
lock (m_lock) {
return(m_views.ContainsKey(description.ViewId));
}
}
/// <summary>
/// Determines whether a node id is a valid view id.
/// </summary>
/// <param name="description">The description.</param>
/// <returns>
/// <c>true</c> if the specified description is valid; otherwise, <c>false</c>.
/// </returns>
public bool IsValid(ViewDescription description)
{
if (ViewDescription.IsDefault(description))
{
return true;
}
lock (m_lock)
{
return m_views.ContainsKey(description.ViewId);
}
}
/// <summary>
/// Returns true if the view description represents the default (null) view.
/// </summary>
public static bool IsDefault(ViewDescription view)
{
if (view == null)
{
return(true);
}
if (NodeId.IsNull(view.m_viewId) && view.m_viewVersion == 0 && view.m_timestamp == DateTime.MinValue)
{
return(true);
}
return(false);
}
/// <summary>
/// Returns true if the view description represents the default (null) view.
/// </summary>
public static bool IsDefault(ViewDescription view)
{
if (view == null)
{
return true;
}
if (NodeId.IsNull(view.m_viewId) && view.m_viewVersion == 0 && view.m_timestamp == DateTime.MinValue)
{
return true;
}
return false;
}
/// <summary>
/// Invokes the Browse service.
/// </summary>
public virtual ResponseHeader Browse(
RequestHeader requestHeader,
ViewDescription view,
uint requestedMaxReferencesPerNode,
BrowseDescriptionCollection nodesToBrowse,
out BrowseResultCollection results,
out DiagnosticInfoCollection diagnosticInfos)
{
results = null;
diagnosticInfos = null;
ValidateRequest(requestHeader);
// Insert implementation.
return(CreateResponse(requestHeader, StatusCodes.BadServiceUnsupported));
}
/// <summary>
/// Determines whether a reference is in a view.
/// </summary>
/// <param name="description">The description.</param>
/// <param name="reference">The reference.</param>
/// <returns>
/// <c>true</c> whether a reference is in a view; otherwise, <c>false</c>.
/// </returns>
public bool IsReferenceInView(ViewDescription description, ReferenceDescription reference)
{
// everything is in the default view.
if (ViewDescription.IsDefault(description))
{
return(true);
}
lock (m_lock) {
ViewNode view = null;
if (m_views.TryGetValue(description.ViewId, out view))
{
throw new ServiceResultException(StatusCodes.BadViewIdUnknown);
}
return(false);
}
}
/// <summary>
/// Determines whether a node is in a view.
/// </summary>
/// <param name="description">The description.</param>
/// <param name="nodeId">The node id.</param>
/// <returns>
/// <c>true</c> whether a node is in a view; otherwise, <c>false</c>.
/// </returns>
public bool IsNodeInView(ViewDescription description, NodeId nodeId)
{
// everything is in the default view.
if (ViewDescription.IsDefault(description))
{
return true;
}
lock (m_lock)
{
ViewNode view = null;
if (m_views.TryGetValue(description.ViewId, out view))
{
throw new ServiceResultException(StatusCodes.BadViewIdUnknown);
}
return false;
}
}
/// <summary>
/// Creates a new browser object with a set of filters.
/// </summary>
/// <param name="context">The system context to use.</param>
/// <param name="view">The view which may restrict the set of references/nodes found.</param>
/// <param name="referenceType">The type of references being followed.</param>
/// <param name="includeSubtypes">Whether subtypes of the reference type are followed.</param>
/// <param name="browseDirection">Which way the references are being followed.</param>
/// <param name="browseName">The browse name of a specific target (used when translating browse paths).</param>
/// <param name="additionalReferences">Any additional references that should be included.</param>
/// <param name="internalOnly">If true the browser should not making blocking calls to external systems.</param>
/// <param name="source">The segment being accessed.</param>
public ArchiveFolderBrowser(
ISystemContext context,
ViewDescription view,
NodeId referenceType,
bool includeSubtypes,
BrowseDirection browseDirection,
QualifiedName browseName,
IEnumerable<IReference> additionalReferences,
bool internalOnly,
ArchiveFolderState source)
:
base(
context,
view,
referenceType,
includeSubtypes,
browseDirection,
browseName,
additionalReferences,
internalOnly)
{
m_source = source;
m_stage = Stage.Begin;
}
/// <summary>
/// Creates a new browser object with a set of filters.
/// </summary>
public MemoryBufferBrowser(
ISystemContext context,
ViewDescription view,
NodeId referenceType,
bool includeSubtypes,
BrowseDirection browseDirection,
QualifiedName browseName,
IEnumerable<IReference> additionalReferences,
bool internalOnly,
MemoryBufferState buffer)
:
base(
context,
view,
referenceType,
includeSubtypes,
browseDirection,
browseName,
additionalReferences,
internalOnly)
{
m_buffer = buffer;
m_stage = Stage.Begin;
}
private void ChangeViewBTN_Click(object sender, EventArgs e)
{
try
{
ViewDescription view = null;
ReferenceDescription reference = ViewCB.SelectedItem as ReferenceDescription;
if (reference != null && !NodeId.IsNull(reference.NodeId))
{
view = new ViewDescription();
view.ViewId = ExpandedNodeId.ToNodeId(reference.NodeId, m_session.NamespaceUris);
view.ViewVersion = 0;
view.Timestamp = DateTime.MinValue;
}
BrowseCTRL.View = view;
BrowseCTRL.RefreshSelection();
}
catch (Exception exception)
{
ClientUtils.HandleException(this.Text, exception);
}
}
/// <summary>
/// Validates the view description passed to a browse request (throws on error).
/// </summary>
protected virtual void ValidateViewDescription(ServerSystemContext context, ViewDescription view)
{
if (ViewDescription.IsDefault(view))
{
return;
}
ViewState node = (ViewState)FindPredefinedNode(view.ViewId, typeof(ViewState));
if (node == null)
{
throw new ServiceResultException(StatusCodes.BadViewIdUnknown);
}
if (view.Timestamp != DateTime.MinValue)
{
throw new ServiceResultException(StatusCodes.BadViewTimestampInvalid);
}
if (view.ViewVersion != 0)
{
throw new ServiceResultException(StatusCodes.BadViewVersionInvalid);
}
}
/// <summary>
/// Prompts the user to select a node.
/// </summary>
public ReferenceDescription ShowDialog(
Session session,
NodeId rootId,
ViewDescription view,
string caption,
params NodeId[] referenceTypeIds)
{
// set the caption.
if (!String.IsNullOrEmpty(caption))
{
this.Text = caption;
}
// set default root.
if (NodeId.IsNull(rootId))
{
rootId = Opc.Ua.ObjectIds.ObjectsFolder;
}
// set default reference type.
if (referenceTypeIds == null)
{
referenceTypeIds = new NodeId[] { Opc.Ua.ReferenceTypeIds.HierarchicalReferences };
}
// initialize the control.
BrowseCTRL.Initialize(session, rootId, referenceTypeIds);
BrowseCTRL.View = view;
// display the dialog.
if (ShowDialog() != DialogResult.OK)
{
return null;
}
return BrowseCTRL.SelectedNode;
}
/// <summary>
/// Invokes the QueryFirst service.
/// </summary>
public virtual ResponseHeader QueryFirst(
RequestHeader requestHeader,
ViewDescription view,
NodeTypeDescriptionCollection nodeTypes,
ContentFilter filter,
uint maxDataSetsToReturn,
uint maxReferencesToReturn,
out QueryDataSetCollection queryDataSets,
out byte[] continuationPoint,
out ParsingResultCollection parsingResults,
out DiagnosticInfoCollection diagnosticInfos,
out ContentFilterResult filterResult)
{
queryDataSets = null;
continuationPoint = null;
parsingResults = null;
diagnosticInfos = null;
filterResult = null;
ValidateRequest(requestHeader);
// Insert implementation.
return CreateResponse(requestHeader, StatusCodes.BadServiceUnsupported);
}
/// <summary>
/// Invokes the Browse service.
/// </summary>
public virtual ResponseHeader Browse(
RequestHeader requestHeader,
ViewDescription view,
uint requestedMaxReferencesPerNode,
BrowseDescriptionCollection nodesToBrowse,
out BrowseResultCollection results,
out DiagnosticInfoCollection diagnosticInfos)
{
results = null;
diagnosticInfos = null;
ValidateRequest(requestHeader);
// Insert implementation.
return CreateResponse(requestHeader, StatusCodes.BadServiceUnsupported);
}
/// <summary>
/// Called to create the browser for the item configuration.
/// </summary>
private NodeBrowser OnCreateItemConfigurationBrowser(
ISystemContext context,
NodeState node,
ViewDescription view,
NodeId referenceType,
bool includeSubtypes,
BrowseDirection browseDirection,
QualifiedName browseName,
IEnumerable<IReference> additionalReferences,
bool internalOnly)
{
HdaParsedNodeId nodeId = HdaParsedNodeId.Parse(node.NodeId);
if (nodeId == null)
{
return null;
}
return new HdaElementBrower(
context,
view,
referenceType,
includeSubtypes,
browseDirection,
browseName,
additionalReferences,
internalOnly,
nodeId.RootId,
Opc.Ua.ObjectTypeIds.HistoricalDataConfigurationType,
Opc.Ua.BrowseNames.HAConfiguration,
NamespaceIndex);
}
/// <summary>
/// Browses the address space and returns the references found.
/// </summary>
public static ReferenceDescriptionCollection Browse(Session session, ViewDescription view, BrowseDescriptionCollection nodesToBrowse, bool throwOnError)
{
try
{
ReferenceDescriptionCollection references = new ReferenceDescriptionCollection();
BrowseDescriptionCollection unprocessedOperations = new BrowseDescriptionCollection();
while (nodesToBrowse.Count > 0)
{
// start the browse operation.
BrowseResultCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
session.Browse(
null,
view,
0,
nodesToBrowse,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, nodesToBrowse);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToBrowse);
ByteStringCollection continuationPoints = new ByteStringCollection();
for (int ii = 0; ii < nodesToBrowse.Count; ii++)
{
// check for error.
if (StatusCode.IsBad(results[ii].StatusCode))
{
// this error indicates that the server does not have enough simultaneously active
// continuation points. This request will need to be resent after the other operations
// have been completed and their continuation points released.
if (results[ii].StatusCode == StatusCodes.BadNoContinuationPoints)
{
unprocessedOperations.Add(nodesToBrowse[ii]);
}
continue;
}
// check if all references have been fetched.
if (results[ii].References.Count == 0)
{
continue;
}
// save results.
references.AddRange(results[ii].References);
// check for continuation point.
if (results[ii].ContinuationPoint != null)
{
continuationPoints.Add(results[ii].ContinuationPoint);
}
}
// process continuation points.
ByteStringCollection revisedContiuationPoints = new ByteStringCollection();
while (continuationPoints.Count > 0)
{
// continue browse operation.
session.BrowseNext(
null,
false,
continuationPoints,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, continuationPoints);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, continuationPoints);
for (int ii = 0; ii < continuationPoints.Count; ii++)
{
// check for error.
if (StatusCode.IsBad(results[ii].StatusCode))
{
continue;
}
// check if all references have been fetched.
if (results[ii].References.Count == 0)
{
continue;
}
// save results.
references.AddRange(results[ii].References);
// check for continuation point.
if (results[ii].ContinuationPoint != null)
{
revisedContiuationPoints.Add(results[ii].ContinuationPoint);
}
}
// check if browsing must continue;
revisedContiuationPoints = continuationPoints;
}
// check if unprocessed results exist.
nodesToBrowse = unprocessedOperations;
}
// return complete list.
return references;
}
catch (Exception exception)
{
if (throwOnError)
{
throw new ServiceResultException(exception, StatusCodes.BadUnexpectedError);
}
return null;
}
}
/// <summary>
/// Begins an asynchronous invocation of the Browse service.
/// </summary>
public IAsyncResult BeginBrowse(
RequestHeader requestHeader,
ViewDescription view,
uint requestedMaxReferencesPerNode,
BrowseDescriptionCollection nodesToBrowse,
AsyncCallback callback,
object asyncState)
{
BrowseRequest request = new BrowseRequest();
request.RequestHeader = requestHeader;
request.View = view;
request.RequestedMaxReferencesPerNode = requestedMaxReferencesPerNode;
request.NodesToBrowse = nodesToBrowse;
UpdateRequestHeader(request, requestHeader == null, "Browse");
if (UseTransportChannel)
{
return TransportChannel.BeginSendRequest(request, callback, asyncState);
}
return InnerChannel.BeginBrowse(new BrowseMessage(request), callback, asyncState);
}
/// <summary>
/// Invokes the QueryFirst service.
/// </summary>
public virtual ResponseHeader QueryFirst(
RequestHeader requestHeader,
ViewDescription view,
NodeTypeDescriptionCollection nodeTypes,
ContentFilter filter,
uint maxDataSetsToReturn,
uint maxReferencesToReturn,
out QueryDataSetCollection queryDataSets,
out byte[] continuationPoint,
out ParsingResultCollection parsingResults,
out DiagnosticInfoCollection diagnosticInfos,
out ContentFilterResult filterResult)
{
QueryFirstRequest request = new QueryFirstRequest();
QueryFirstResponse response = null;
request.RequestHeader = requestHeader;
request.View = view;
request.NodeTypes = nodeTypes;
request.Filter = filter;
request.MaxDataSetsToReturn = maxDataSetsToReturn;
request.MaxReferencesToReturn = maxReferencesToReturn;
UpdateRequestHeader(request, requestHeader == null, "QueryFirst");
try
{
if (UseTransportChannel)
{
IServiceResponse genericResponse = TransportChannel.SendRequest(request);
if (genericResponse == null)
{
throw new ServiceResultException(StatusCodes.BadUnknownResponse);
}
ValidateResponse(genericResponse.ResponseHeader);
response = (QueryFirstResponse)genericResponse;
}
else
{
QueryFirstResponseMessage responseMessage = InnerChannel.QueryFirst(new QueryFirstMessage(request));
if (responseMessage == null || responseMessage.QueryFirstResponse == null)
{
throw new ServiceResultException(StatusCodes.BadUnknownResponse);
}
response = responseMessage.QueryFirstResponse;
ValidateResponse(response.ResponseHeader);
}
queryDataSets = response.QueryDataSets;
continuationPoint = response.ContinuationPoint;
parsingResults = response.ParsingResults;
diagnosticInfos = response.DiagnosticInfos;
filterResult = response.FilterResult;
}
finally
{
RequestCompleted(request, response, "QueryFirst");
}
return response.ResponseHeader;
}
/// <summary>
/// Validates the view description passed to a browse request (throws on error).
/// </summary>
protected virtual void ValidateViewDescription(ServerSystemContext context, ViewDescription view)
{
if (!ViewDescription.IsDefault(view))
{
throw new ServiceResultException(StatusCodes.BadViewIdUnknown);
}
}
/// <summary>
/// Begins an asynchronous invocation of the QueryFirst service.
/// </summary>
public IAsyncResult BeginQueryFirst(
RequestHeader requestHeader,
ViewDescription view,
NodeTypeDescriptionCollection nodeTypes,
ContentFilter filter,
uint maxDataSetsToReturn,
uint maxReferencesToReturn,
AsyncCallback callback,
object asyncState)
{
QueryFirstRequest request = new QueryFirstRequest();
request.RequestHeader = requestHeader;
request.View = view;
request.NodeTypes = nodeTypes;
request.Filter = filter;
request.MaxDataSetsToReturn = maxDataSetsToReturn;
request.MaxReferencesToReturn = maxReferencesToReturn;
UpdateRequestHeader(request, requestHeader == null, "QueryFirst");
if (UseTransportChannel)
{
return TransportChannel.BeginSendRequest(request, callback, asyncState);
}
return InnerChannel.BeginQueryFirst(new QueryFirstMessage(request), callback, asyncState);
}
public override INodeBrowser CreateBrowser(
ISystemContext context,
ViewDescription view,
NodeId referenceType,
bool includeSubtypes,
BrowseDirection browseDirection,
QualifiedName browseName,
IEnumerable<IReference> additionalReferences,
bool internalOnly)
{
MemoryRegisterBrowser browser = new MemoryRegisterBrowser(
context,
view,
referenceType,
includeSubtypes,
browseDirection,
browseName,
additionalReferences,
internalOnly,
this);
return browser;
}
/// <summary>
/// Used to receive notifications when a node browser is created.
/// </summary>
public NodeBrowser OnCreateBrowser(
ISystemContext context,
NodeState node,
ViewDescription view,
NodeId referenceType,
bool includeSubtypes,
BrowseDirection browseDirection,
QualifiedName browseName,
IEnumerable<IReference> additionalReferences,
bool internalOnly)
{
Browser browser = new Browser(
context,
view,
referenceType,
includeSubtypes,
browseDirection,
browseName,
null,
false,
GetClientSession(context as ServerSystemContext),
m_mapper,
Object.ReferenceEquals(node, m_root)?null:node,
m_root.NodeId);
return browser;
}
/// <summary>
/// Invokes the Browse service.
/// </summary>
public virtual ResponseHeader Browse(
RequestHeader requestHeader,
ViewDescription view,
uint requestedMaxReferencesPerNode,
BrowseDescriptionCollection nodesToBrowse,
out BrowseResultCollection results,
out DiagnosticInfoCollection diagnosticInfos)
{
BrowseRequest request = new BrowseRequest();
BrowseResponse response = null;
request.RequestHeader = requestHeader;
request.View = view;
request.RequestedMaxReferencesPerNode = requestedMaxReferencesPerNode;
request.NodesToBrowse = nodesToBrowse;
UpdateRequestHeader(request, requestHeader == null, "Browse");
try
{
if (UseTransportChannel)
{
IServiceResponse genericResponse = TransportChannel.SendRequest(request);
if (genericResponse == null)
{
throw new ServiceResultException(StatusCodes.BadUnknownResponse);
}
ValidateResponse(genericResponse.ResponseHeader);
response = (BrowseResponse)genericResponse;
}
else
{
BrowseResponseMessage responseMessage = InnerChannel.Browse(new BrowseMessage(request));
if (responseMessage == null || responseMessage.BrowseResponse == null)
{
throw new ServiceResultException(StatusCodes.BadUnknownResponse);
}
response = responseMessage.BrowseResponse;
ValidateResponse(response.ResponseHeader);
}
results = response.Results;
diagnosticInfos = response.DiagnosticInfos;
}
finally
{
RequestCompleted(request, response, "Browse");
}
return response.ResponseHeader;
}
/// <summary>
/// Creates a browser that finds the references to the branch.
/// </summary>
/// <param name="context">The system context to use.</param>
/// <param name="view">The view which may restrict the set of references/nodes found.</param>
/// <param name="referenceType">The type of references being followed.</param>
/// <param name="includeSubtypes">Whether subtypes of the reference type are followed.</param>
/// <param name="browseDirection">Which way the references are being followed.</param>
/// <param name="browseName">The browse name of a specific target (used when translating browse paths).</param>
/// <param name="additionalReferences">Any additional references that should be included.</param>
/// <param name="internalOnly">If true the browser should not making blocking calls to external systems.</param>
/// <returns>The browse object (must be disposed).</returns>
public override INodeBrowser CreateBrowser(
ISystemContext context,
ViewDescription view,
NodeId referenceType,
bool includeSubtypes,
BrowseDirection browseDirection,
QualifiedName browseName,
IEnumerable<IReference> additionalReferences,
bool internalOnly)
{
NodeBrowser browser = new DaElementBrowser(
context,
view,
referenceType,
includeSubtypes,
browseDirection,
browseName,
additionalReferences,
internalOnly,
this.ItemId,
this.NodeId.NamespaceIndex);
PopulateBrowser(context, browser);
return browser;
}
/// <summary>
/// Browses the address space and returns the references found.
/// </summary>
public static ReferenceDescriptionCollection Browse(Session session, ViewDescription view, BrowseDescription nodeToBrowse, bool throwOnError)
{
try
{
ReferenceDescriptionCollection references = new ReferenceDescriptionCollection();
// construct browse request.
BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
nodesToBrowse.Add(nodeToBrowse);
// start the browse operation.
BrowseResultCollection results = null;
DiagnosticInfoCollection diagnosticInfos = null;
session.Browse(
null,
view,
0,
nodesToBrowse,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, nodesToBrowse);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToBrowse);
do
{
// check for error.
if (StatusCode.IsBad(results[0].StatusCode))
{
throw new ServiceResultException(results[0].StatusCode);
}
// process results.
for (int ii = 0; ii < results[0].References.Count; ii++)
{
references.Add(results[0].References[ii]);
}
// check if all references have been fetched.
if (results[0].References.Count == 0 || results[0].ContinuationPoint == null)
{
break;
}
// continue browse operation.
ByteStringCollection continuationPoints = new ByteStringCollection();
continuationPoints.Add(results[0].ContinuationPoint);
session.BrowseNext(
null,
false,
continuationPoints,
out results,
out diagnosticInfos);
ClientBase.ValidateResponse(results, continuationPoints);
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, continuationPoints);
}
while (true);
//return complete list.
return references;
}
catch (Exception exception)
{
if (throwOnError)
{
throw new ServiceResultException(exception, StatusCodes.BadUnexpectedError);
}
return null;
}
}
