Package wt.visitor

Defines the navigator/visitor design pattern for using a Walker (at one time it used a Navigator, instead of a Walker) and a NodeExpander, which together traverse a structure of objects, and a Visitor, which does something when we navigate to the object; this separates the algorithm for navigating from the algorithm for visiting, allowing more reuse; factories support selection of Walkers and Visitors.

See:
Description

Interface Summary

Expander	The Expander interface is used for selecting an implementation of the expand operation.
NodeExpander	This interface defines how nodes will be expanded (i.e.
NodeExpandInfo	This interface describes the applicable links and expand method for a given node during traversal.
Visitor	This interface defines generic "callback" methods which are called by the Navigator as a structure is traversed.
Walker	This interface is responsible for controlling the overall traversal mechanism.

Class Summary

BasicExpander
BasicNodeExpander	This class implements NodeExpander by using an Expander and NodeLinkInfo delegates.
BasicNodeExpandInfo	This interface describes the applicable links and expand method for a given node during traversal.
BasicWalker	This abstract class is an implementation which provides some basic functionality for sub-class use.
BFSNavigator	Deprecated. Use wt.visitor.BFSWalker
BFSWalker	This class extends BasicWalker to implement a breadth-first traversal of a structure.
CompositeVisitor	This class provides a mechanism for supporting more than one Visitor object that can be visited during a single traversal.
ConfigSpecNodeExpander	The ConfigSpecNodeExpander class uses the Struct Service and a ConfigSpec to implement the expand operation.
DFSNavigator	Deprecated. Use wt.visitor.DFSWalker
DFSWalker	This class extends BasicWalker to implement a depth-first traversal of a structure.
EPMDocConfigSpecNodeExpander	The EPMDocConfigSpecNodeExpander class uses the EPMStruct Service and a ConfigSpec to implement the expand operation.
EPMDocReqNodeExpander	The EPMDocReqNodeExpander class uses the EPMStruct Service and a ConfigSpec to implement the expand operation.
Navigator	Deprecated. Use wt.visitor.Walker
NodeExpanderFactory	Supported API: true Extendable: false
OccurrencedPartConfigSpecNodeExpander	Supported API: true Extendable: false
PartConfigSpecNodeExpander	The ConfigSpecNodeExpander class uses the PartService and a WTPartConfigSpec to implement the expand operation.
PathNode	A PathNode represents a node in a path established by a Walker or a simalar graph generation mechanism.
ProductInstanceConfigSpecNodeExpander	Supported API: true Extendable: false
ProductStructureNavigatorFactory	This class provides static methods for creating product structure navigators.
ReverseConfigSpecNodeExpander	The ConfigSpecNodeExpander class uses the Struct Service and a ConfigSpec to implement the expand operation.
ReverseOccurrencedConfigSpecNodeExpander	This ConfigSpecNodeExpander class uses the Struct Service and a ConfigSpec to implement the expand operation.
RoleExpandInfo	This class encapsulates the data necessary for navigating from a node to other nodes via association links.
TextOutputVisitor	The TextOutputVisitor can be used as a base class for Visitor implementations that are primarily used to produce text output.
VisitorAdapter	This class provides a default "no-op" implementation of a Visitor.
WalkerFactory	Supported API: true Extendable: false

Package wt.visitor Description

Defines the navigator/visitor design pattern for using a Walker (at one time it used a Navigator, instead of a Walker) and a NodeExpander, which together traverse a structure of objects, and a Visitor, which does something when we navigate to the object; this separates the algorithm for navigating from the algorithm for visiting, allowing more reuse; factories support selection of Walkers and Visitors.