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ElementWalker Class

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.10.0 (in Microsoft.VisualStudio.Modeling.Sdk.10.0.dll)

Syntax

'宣言
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
Protected method ElementWalker(IElementVisitor, IElementVisitorFilter) Constructor that takes an ElementVisitor.
Protected method ElementWalker(IElementVisitor, IElementVisitorFilter, Boolean) Constructor that takes an ElementVisitor.

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Properties

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

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Methods

  Name Description
Public method DoTraverse Traverse the model starting at the specified starting element.
Public method Equals Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected method Finalize Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public method GetHashCode Serves as a hash function for a particular type. (Inherited from Object.)
Public method GetType Gets the Type of the current instance. (Inherited from Object.)
Protected method 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.
Protected method MarkVisited Mark an element as having been already visited
Protected method MemberwiseClone Creates a shallow copy of the current Object. (Inherited from Object.)
Protected method 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.
Public method Reset Reset the visitor so that it can start traversing again. This is necessary to clear out the internal list of previously visited elements.
Protected method ShouldVisitLinkAgain True if the link has been visited before the currentElement (one of its roleplayers) was visited.
Public method ToString Returns a string that represents the current object. (Inherited from Object.)
Public method Traverse(ModelElement) Traverse the model starting at the specified starting element.
Public method Traverse(ICollection<ModelElement>) Traverse the model starting at the specified starting elements.
Public method 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.

See Also

Reference

Microsoft.VisualStudio.Modeling Namespace