Package org.eclipse.aether.util.graph.visitor

Class TreeDependencyVisitor

java.lang.Object

org.eclipse.aether.util.graph.visitor.TreeDependencyVisitor

All Implemented Interfaces:

DependencyVisitor

public final class TreeDependencyVisitor
extends java.lang.Object
implements DependencyVisitor

A dependency visitor that delegates to another visitor if a node hasn't been visited before. In other words, this visitor provides a tree-view of a dependency graph which generally can have multiple paths to the same node or even cycles.

Field Summary

Fields

Modifier and Type	Field	Description
private java.util.Map<DependencyNode,java.lang.Object>	visitedNodes
private DependencyVisitor	visitor
private Stack<java.lang.Boolean>	visits

Constructor Summary

Constructors

Constructor	Description
TreeDependencyVisitor(DependencyVisitor visitor)	Creates a new visitor that delegates to the specified visitor.

Method Summary

Modifier and Type	Method	Description
boolean	visitEnter(DependencyNode node)	Notifies the visitor of a node visit before its children have been processed.
boolean	visitLeave(DependencyNode node)	Notifies the visitor of a node visit after its children have been processed.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

visitedNodes

private final java.util.Map<DependencyNode,java.lang.Object> visitedNodes

visitor

private final DependencyVisitor visitor

visits

private final Stack<java.lang.Boolean> visits

Constructor Detail

TreeDependencyVisitor

public TreeDependencyVisitor(DependencyVisitor visitor)

Creates a new visitor that delegates to the specified visitor.

Parameters:

visitor - The visitor to delegate to, must not be null.

Method Detail

visitEnter

public boolean visitEnter(DependencyNode node)

Description copied from interface: DependencyVisitor

Notifies the visitor of a node visit before its children have been processed.

Specified by:

visitEnter in interface DependencyVisitor

Parameters:

node - The dependency node being visited, must not be null.

Returns:

true to visit child nodes of the specified node as well, false to skip children.

visitLeave

public boolean visitLeave(DependencyNode node)

Description copied from interface: DependencyVisitor

Notifies the visitor of a node visit after its children have been processed. Note that this method is always invoked regardless whether any children have actually been visited.

Specified by:

visitLeave in interface DependencyVisitor

Parameters:

node - The dependency node being visited, must not be null.

Returns:

true to visit siblings nodes of the specified node as well, false to skip siblings.