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

Class CloningDependencyVisitor

java.lang.Object

org.eclipse.aether.util.graph.visitor.CloningDependencyVisitor

All Implemented Interfaces:

DependencyVisitor

public class CloningDependencyVisitor
extends java.lang.Object
implements DependencyVisitor

A dependency visitor that constructs a clone of the visited dependency graph. If such a visitor is passed into a FilteringDependencyVisitor, a sub graph can be created. This class creates shallow clones of the visited dependency nodes (via DefaultDependencyNode(DependencyNode)) but clients can create a subclass and override clone(DependencyNode) to alter the clone process.

Field Summary

Fields

Modifier and Type	Field	Description
private java.util.Map<DependencyNode,DependencyNode>	clones
private Stack<DependencyNode>	parents
private DependencyNode	root

Constructor Summary

Constructors

Constructor	Description
CloningDependencyVisitor()	Creates a new visitor that clones the visited nodes.

Method Summary

Modifier and Type	Method	Description
protected DependencyNode	clone(DependencyNode node)	Creates a clone of the specified node.
DependencyNode	getRootNode()	Gets the root node of the cloned dependency graph.
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

clones

private final java.util.Map<DependencyNode,DependencyNode> clones

parents

private final Stack<DependencyNode> parents

root

private DependencyNode root

Constructor Detail

CloningDependencyVisitor

public CloningDependencyVisitor()

Creates a new visitor that clones the visited nodes.

Method Detail

getRootNode

public final DependencyNode getRootNode()

Gets the root node of the cloned dependency graph.

Returns:

The root node of the cloned dependency graph or null.

clone

protected DependencyNode clone(DependencyNode node)

Creates a clone of the specified node.

Parameters:

node - The node to clone, must not be null.

Returns:

The cloned node, never null.

visitEnter

public final 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 final 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.