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

Class FilteringDependencyVisitor

java.lang.Object

org.eclipse.aether.util.graph.visitor.FilteringDependencyVisitor

All Implemented Interfaces:

DependencyVisitor

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

A dependency visitor that delegates to another visitor if nodes match a filter. Note that in case of a mismatching node, the children of that node are still visisted and presented to the filter.

Field Summary

Fields

Modifier and Type	Field	Description
private Stack<java.lang.Boolean>	accepts
private DependencyFilter	filter
private Stack<DependencyNode>	parents
private DependencyVisitor	visitor

Constructor Summary

Constructors

Constructor	Description
FilteringDependencyVisitor(DependencyVisitor visitor, DependencyFilter filter)	Creates a new visitor that delegates traversal of nodes matching the given filter to the specified visitor.

Method Summary

Modifier and Type	Method	Description
DependencyFilter	getFilter()	Gets the filter being applied before delegation.
DependencyVisitor	getVisitor()	Gets the visitor to which this visitor delegates to.
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

filter

private final DependencyFilter filter

visitor

private final DependencyVisitor visitor

accepts

private final Stack<java.lang.Boolean> accepts

parents

private final Stack<DependencyNode> parents

Constructor Detail

FilteringDependencyVisitor

public FilteringDependencyVisitor(DependencyVisitor visitor,
                                  DependencyFilter filter)

Creates a new visitor that delegates traversal of nodes matching the given filter to the specified visitor.

Parameters:

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

filter - The filter to apply, may be null to not filter.

Method Detail

getVisitor

public DependencyVisitor getVisitor()

Gets the visitor to which this visitor delegates to.

Returns:

The visitor being delegated to, never null.

getFilter

public DependencyFilter getFilter()

Gets the filter being applied before delegation.

Returns:

The filter being applied or null if none.

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.