Package org.eclipse.aether.util.graph.transformer

Class NearestVersionSelector

java.lang.Object

org.eclipse.aether.util.graph.transformer.ConflictResolver.VersionSelector

org.eclipse.aether.util.graph.transformer.NearestVersionSelector

public final class NearestVersionSelector
extends ConflictResolver.VersionSelector

A version selector for use with ConflictResolver that resolves version conflicts using a nearest-wins strategy. If there is no single node that satisfies all encountered version ranges, the selector will fail.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) static class	NearestVersionSelector.ConflictGroup

Constructor Summary

Constructors

Constructor	Description
NearestVersionSelector()	Creates a new instance of this version selector.

Method Summary

Modifier and Type	Method	Description
private void	backtrack(NearestVersionSelector.ConflictGroup group, ConflictResolver.ConflictContext context)
private boolean	isAcceptable(NearestVersionSelector.ConflictGroup group, Version version)
private boolean	isNearer(ConflictResolver.ConflictItem item1, ConflictResolver.ConflictItem item2)
private UnsolvableVersionConflictException	newFailure(ConflictResolver.ConflictContext context)
void	selectVersion(ConflictResolver.ConflictContext context)	Determines the winning node among conflicting dependencies.

Methods inherited from class org.eclipse.aether.util.graph.transformer.ConflictResolver.VersionSelector

getInstance

Methods inherited from class java.lang.Object

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

Constructor Detail

NearestVersionSelector

public NearestVersionSelector()

Creates a new instance of this version selector.

Method Detail

selectVersion

public void selectVersion(ConflictResolver.ConflictContext context)
                   throws RepositoryException

Description copied from class: ConflictResolver.VersionSelector

Determines the winning node among conflicting dependencies. Implementations will usually iterate ConflictResolver.ConflictContext.getItems(), inspect ConflictResolver.ConflictItem.getNode() and eventually call ConflictResolver.ConflictContext.setWinner(ConflictResolver.ConflictItem) to deliver the winner. Failure to select a winner will automatically fail the entire conflict resolution.

Specified by:

selectVersion in class ConflictResolver.VersionSelector

Parameters:

context - The conflict context, must not be null.

Throws:

RepositoryException - If the version selection failed.

backtrack

private void backtrack(NearestVersionSelector.ConflictGroup group,
                       ConflictResolver.ConflictContext context)
                throws UnsolvableVersionConflictException

Throws:

UnsolvableVersionConflictException

isAcceptable

private boolean isAcceptable(NearestVersionSelector.ConflictGroup group,
                             Version version)

isNearer

private boolean isNearer(ConflictResolver.ConflictItem item1,
                         ConflictResolver.ConflictItem item2)

newFailure

private UnsolvableVersionConflictException newFailure(ConflictResolver.ConflictContext context)