/// <summary>
/// Populates the browser with references that meet the criteria.
/// </summary>
/// <param name="context">The context for the system being accessed.</param>
/// <param name="browser">The browser to populate.</param>
protected override void PopulateBrowser(ISystemContext context, NodeBrowser browser)
{
base.PopulateBrowser(context, browser);
// check if the parent segments need to be returned.
if (browser.IsRequired(ReferenceTypeIds.Organizes, true))
{
UnderlyingSystem system = context.SystemHandle as UnderlyingSystem;
if (system == null)
{
return;
}
// add reference for each segment.
IList <UnderlyingSystemSegment> segments = system.FindSegmentsForBlock(m_blockId);
for (int ii = 0; ii < segments.Count; ii++)
{
browser.Add(ReferenceTypeIds.Organizes, true, ModelUtils.ConstructIdForSegment(segments[ii].Id, this.NodeId.NamespaceIndex));
}
}
}
/// <summary>
/// Populates the browser with references that meet the criteria.
/// </summary>
/// <param name="context">The context for the system being accessed.</param>
/// <param name="browser">The browser to populate.</param>
protected override void PopulateBrowser(ISystemContext context, NodeBrowser browser)
{
base.PopulateBrowser(context, browser);
// check if the parent segments need to be returned.
if (browser.IsRequired(ReferenceTypeIds.Organizes, true))
{
UnderlyingSystem system = context.SystemHandle as UnderlyingSystem;
if (system == null)
{
return;
}
// add reference for parent segment.
UnderlyingSystemSegment segment = system.FindParentForSegment(m_segmentPath);
if (segment != null)
{
browser.Add(ReferenceTypeIds.Organizes, true, ModelUtils.ConstructIdForSegment(segment.Id, this.NodeId.NamespaceIndex));
}
}
}
/// <summary>
/// Returns the next child.
/// </summary>
private IReference NextChild()
{
UnderlyingSystem system = (UnderlyingSystem)this.SystemContext.SystemHandle;
NodeId targetId = null;
// check if a specific browse name is requested.
if (!QualifiedName.IsNull(base.BrowseName))
{
// check if match found previously.
if (m_position == Int32.MaxValue)
{
return(null);
}
// browse name must be qualified by the correct namespace.
if (m_source.BrowseName.NamespaceIndex != base.BrowseName.NamespaceIndex)
{
return(null);
}
// look for matching segment.
if (m_stage == Stage.Segments && m_segments != null)
{
for (int ii = 0; ii < m_segments.Count; ii++)
{
if (base.BrowseName.Name == m_segments[ii].Name)
{
targetId = ModelUtils.ConstructIdForSegment(m_segments[ii].Id, m_source.NodeId.NamespaceIndex);
break;
}
}
}
// look for matching block.
if (m_stage == Stage.Blocks && m_blocks != null)
{
for (int ii = 0; ii < m_blocks.Count; ii++)
{
UnderlyingSystemBlock block = system.FindBlock(m_blocks[ii]);
if (block != null && base.BrowseName.Name == block.Name)
{
targetId = ModelUtils.ConstructIdForBlock(m_blocks[ii], m_source.NodeId.NamespaceIndex);
break;
}
}
}
m_position = Int32.MaxValue;
}
// return the child at the next position.
else
{
// look for next segment.
if (m_stage == Stage.Segments && m_segments != null)
{
if (m_position >= m_segments.Count)
{
return(null);
}
targetId = ModelUtils.ConstructIdForSegment(m_segments[m_position++].Id, m_source.NodeId.NamespaceIndex);
}
// look for next block.
else if (m_stage == Stage.Blocks && m_blocks != null)
{
if (m_position >= m_blocks.Count)
{
return(null);
}
targetId = ModelUtils.ConstructIdForBlock(m_blocks[m_position++], m_source.NodeId.NamespaceIndex);
}
}
// create reference.
if (targetId != null)
{
return(new NodeStateReference(ReferenceTypeIds.Organizes, false, targetId));
}
return(null);
}
