ElementWalker Class

Article
11/24/2013

Enables various traversals of the model starting from a particular element.

Inheritance Hierarchy

System.Object
  Microsoft.VisualStudio.Modeling.ElementWalker
    Microsoft.VisualStudio.Modeling.BreadthFirstRolePlayerFirstElementWalker
    Microsoft.VisualStudio.Modeling.DepthFirstElementWalker

Namespace: Microsoft.VisualStudio.Modeling
Assembly: Microsoft.VisualStudio.Modeling.Sdk.12.0 (in Microsoft.VisualStudio.Modeling.Sdk.12.0.dll)

Syntax

'Declaration
Public MustInherit Class ElementWalker

public abstract class ElementWalker

public ref class ElementWalker abstract

[<AbstractClass>]
type ElementWalker =  class end

public abstract class ElementWalker

The ElementWalker type exposes the following members.

Constructors

	Name	Description
	ElementWalker(IElementVisitor, IElementVisitorFilter)	Constructor that takes an ElementVisitor.
	ElementWalker(IElementVisitor, IElementVisitorFilter, Boolean)	Constructor that takes an ElementVisitor.

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Properties

	Name	Description
	BypassDemandLoading	Allows the walker to bypass demand loading while traversing
	Filter	Get or set the IElementVisitorFilter for use during traversal
	IncludeLinks	Returns true if the walker will include element links in calls to the visitor function
	InternalElementList	Get the internal list of elements that will be visited
	Store	Get the internal list of elements that will be visited
	Visitor	Get or set the IElementVisitor for use during traversal

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Methods

	Name	Description
	DoTraverse	Traverse the model starting at the specified starting element.
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object.)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
	GetHashCode	Serves as the default hash function. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	MarkForRemovalFromInternalElementList	Mark an element for removal from the InternalElementList. We mark first and remove later at the end so that the indices remain valid. When marking elements as visited, we store an index in the hashtable which tells us the order that the element was visited in. If the elements were put into the InternalElementList in that order, we can find the element easily using the index. If not a linear search will be used to find the element.
	MarkVisited	Mark an element as having been already visited
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object.)
	RemoveMarkedElements	Removes the elements that are marked for removal. Call this at the end of the traversal so that the indices in alreadyVisited remain valid.
	Reset	Reset the visitor so that it can start traversing again. This is necessary to clear out the internal list of previously visited elements.
	ShouldVisitLinkAgain	True if the link has been visited before the currentElement (one of its roleplayers) was visited.
	ToString	Returns a string that represents the current object. (Inherited from Object.)
	Traverse(ModelElement)	Traverse the model starting at the specified starting element.
	Traverse(ICollection<ModelElement>)	Traverse the model starting at the specified starting elements.
	Visited	determines if the given element has been visited or not

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Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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