/// <summary>
/// Initializes the next stage of browsing.
/// </summary>
private void NextStage()
{
ComAeClientManager system = (ComAeClientManager)this.SystemContext.SystemHandle;
ComAeClient client = system.SelectClient((ServerSystemContext)SystemContext, false);
// determine which stage is next based on the reference types requested.
for (Stage next = m_stage + 1; next <= Stage.Done; next++)
{
if (next == Stage.Children)
{
if (IsRequired(ReferenceTypeIds.HasNotifier, false))
{
m_stage = next;
break;
}
}
else if (next == Stage.Parents)
{
if (IsRequired(ReferenceTypeIds.HasNotifier, true))
{
m_stage = next;
break;
}
}
else if (next == Stage.Done)
{
m_stage = next;
break;
}
}
// start enumerating areas.
if (m_stage == Stage.Children)
{
m_browser = new ComAeBrowserClient(client, m_qualifiedName);
return;
}
// start enumerating parents.
if (m_stage == Stage.Parents)
{
return;
}
// all done.
}
/// <summary>
/// Verifies that the specified node exists.
/// </summary>
protected override NodeState ValidateNode(
ServerSystemContext context,
NodeHandle handle,
IDictionary <NodeId, NodeState> cache)
{
// not valid if no root.
if (handle == null)
{
return(null);
}
// check if previously validated.
if (handle.Validated)
{
return(handle.Node);
}
NodeState target = null;
// check if already in the cache.
if (cache != null)
{
if (cache.TryGetValue(handle.NodeId, out target))
{
// nulls mean a NodeId which was previously found to be invalid has been referenced again.
if (target == null)
{
return(null);
}
handle.Node = target;
handle.Validated = true;
return(handle.Node);
}
target = null;
}
try
{
// check if the node id has been parsed.
AeParsedNodeId parsedNodeId = handle.ParsedNodeId as AeParsedNodeId;
if (parsedNodeId == null)
{
return(null);
}
ComAeClient client = m_system.SelectClient(context, false);
switch (parsedNodeId.RootType)
{
case AeModelUtils.AeSimpleEventType:
case AeModelUtils.AeTrackingEventType:
case AeModelUtils.AeConditionEventType:
{
if (m_typeCache == null)
{
return(null);
}
BaseObjectTypeState eventTypeNode = null;
NodeId rootId = AeParsedNodeId.Construct(parsedNodeId.RootType, parsedNodeId.CategoryId, parsedNodeId.ConditionName, parsedNodeId.NamespaceIndex);
if (!m_typeCache.EventTypeNodes.TryGetValue(rootId, out eventTypeNode))
{
return(null);
}
target = eventTypeNode;
break;
}
case AeModelUtils.AeArea:
{
ComAeBrowserClient browser = new ComAeBrowserClient(client, null);
target = browser.FindArea(context, parsedNodeId.RootId, NamespaceIndex);
browser.Dispose();
handle.Validated = true;
handle.Node = target;
return(handle.Node);
}
case AeModelUtils.AeSource:
{
ComAeBrowserClient browser = new ComAeBrowserClient(client, null);
target = browser.FindSource(context, parsedNodeId.RootId, parsedNodeId.ComponentPath, NamespaceIndex);
browser.Dispose();
handle.Validated = true;
handle.Node = target;
return(handle.Node);
}
case AeModelUtils.AeCondition:
{
target = new AeConditionState(context, handle, m_templateAlarm.Acknowledge);
break;
}
}
// node does not exist.
if (target == null)
{
return(null);
}
if (!String.IsNullOrEmpty(parsedNodeId.ComponentPath))
{
// validate component.
NodeState component = target.FindChildBySymbolicName(context, parsedNodeId.ComponentPath);
// component does not exist.
if (component == null)
{
return(null);
}
target = component;
}
// found a valid component.
handle.Validated = true;
handle.Node = target;
return(handle.Node);
}
finally
{
// store the node in the cache to optimize subsequent lookups.
if (cache != null)
{
cache.Add(handle.NodeId, target);
}
}
}
/// <summary>
/// Initializes the next stage of browsing.
/// </summary>
private void NextStage()
{
ComAeClientManager system = (ComAeClientManager)this.SystemContext.SystemHandle;
ComAeClient client = system.SelectClient((ServerSystemContext)SystemContext, false);
// determine which stage is next based on the reference types requested.
for (Stage next = m_stage+1; next <= Stage.Done; next++)
{
if (next == Stage.Children)
{
if (IsRequired(ReferenceTypeIds.HasNotifier, false))
{
m_stage = next;
break;
}
}
else if (next == Stage.Parents)
{
if (IsRequired(ReferenceTypeIds.HasNotifier, true))
{
m_stage = next;
break;
}
}
else if (next == Stage.Done)
{
m_stage = next;
break;
}
}
// start enumerating areas.
if (m_stage == Stage.Children)
{
m_browser = new ComAeBrowserClient(client, m_qualifiedName);
return;
}
// start enumerating parents.
if (m_stage == Stage.Parents)
{
return;
}
// all done.
}
/// <summary>
/// Verifies that the specified node exists.
/// </summary>
protected override NodeState ValidateNode(
ServerSystemContext context,
NodeHandle handle,
IDictionary<NodeId, NodeState> cache)
{
// not valid if no root.
if (handle == null)
{
return null;
}
// check if previously validated.
if (handle.Validated)
{
return handle.Node;
}
NodeState target = null;
// check if already in the cache.
if (cache != null)
{
if (cache.TryGetValue(handle.NodeId, out target))
{
// nulls mean a NodeId which was previously found to be invalid has been referenced again.
if (target == null)
{
return null;
}
handle.Node = target;
handle.Validated = true;
return handle.Node;
}
target = null;
}
try
{
// check if the node id has been parsed.
AeParsedNodeId parsedNodeId = handle.ParsedNodeId as AeParsedNodeId;
if (parsedNodeId == null)
{
return null;
}
ComAeClient client = m_system.SelectClient(context, false);
switch (parsedNodeId.RootType)
{
case AeModelUtils.AeSimpleEventType:
case AeModelUtils.AeTrackingEventType:
case AeModelUtils.AeConditionEventType:
{
if (m_typeCache == null)
{
return null;
}
BaseObjectTypeState eventTypeNode = null;
NodeId rootId = AeParsedNodeId.Construct(parsedNodeId.RootType, parsedNodeId.CategoryId, parsedNodeId.ConditionName, parsedNodeId.NamespaceIndex);
if (!m_typeCache.EventTypeNodes.TryGetValue(rootId, out eventTypeNode))
{
return null;
}
target = eventTypeNode;
break;
}
case AeModelUtils.AeArea:
{
ComAeBrowserClient browser = new ComAeBrowserClient(client, null);
target = browser.FindArea(context, parsedNodeId.RootId, NamespaceIndex);
browser.Dispose();
handle.Validated = true;
handle.Node = target;
return handle.Node;
}
case AeModelUtils.AeSource:
{
ComAeBrowserClient browser = new ComAeBrowserClient(client, null);
target = browser.FindSource(context, parsedNodeId.RootId, parsedNodeId.ComponentPath, NamespaceIndex);
browser.Dispose();
handle.Validated = true;
handle.Node = target;
return handle.Node;
}
case AeModelUtils.AeCondition:
{
target = new AeConditionState(context, handle, m_templateAlarm.Acknowledge);
break;
}
}
// node does not exist.
if (target == null)
{
return null;
}
if (!String.IsNullOrEmpty(parsedNodeId.ComponentPath))
{
// validate component.
NodeState component = target.FindChildBySymbolicName(context, parsedNodeId.ComponentPath);
// component does not exist.
if (component == null)
{
return null;
}
target = component;
}
// found a valid component.
handle.Validated = true;
handle.Node = target;
return handle.Node;
}
finally
{
// store the node in the cache to optimize subsequent lookups.
if (cache != null)
{
cache.Add(handle.NodeId, target);
}
}
}
