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

Class ConflictResolver.ScopeSelector

java.lang.Object

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

Direct Known Subclasses:

JavaScopeSelector, ManagedScopeSelector

Enclosing class:

ConflictResolver

public abstract static class ConflictResolver.ScopeSelector
extends Object

An extension point of ConflictResolver that determines the effective scope of a dependency from a potentially conflicting set of derived scopes. The scope selector gets invoked after the ConflictResolver.VersionSelector has picked the winning node.

Note: Implementations must be stateless.

Constructor Summary

Constructors

Constructor	Description
ScopeSelector()

Method Summary

Modifier and Type	Method	Description
ConflictResolver.ScopeSelector	getInstance(DependencyNode root, DependencyGraphTransformationContext context)	Retrieves the scope selector for use during the specified graph transformation.
abstract void	selectScope(ConflictResolver.ConflictContext context)	Determines the effective scope of the dependency given by ConflictResolver.ConflictContext.getWinner().

Methods inherited from class java.lang.Object

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

Constructor Details

ScopeSelector

public ScopeSelector()

Method Details

getInstance

public ConflictResolver.ScopeSelector getInstance(DependencyNode root,
 DependencyGraphTransformationContext context)
                                           throws RepositoryException

Retrieves the scope selector for use during the specified graph transformation. The conflict resolver calls this method once per ConflictResolver.transformGraph(DependencyNode, DependencyGraphTransformationContext) invocation to allow implementations to prepare any auxiliary data that is needed for their operation. Given that implementations must be stateless, a new instance needs to be returned to hold such auxiliary data. The default implementation simply returns the current instance which is appropriate for implementations which do not require auxiliary data.

Parameters:

root - the root node of the (possibly cyclic!) graph to transform, must not be null

context - the graph transformation context, must not be null

Returns:

the scope selector to use for the given graph transformation, never null

Throws:

RepositoryException - if the instance could not be retrieved

selectScope

public abstract void selectScope(ConflictResolver.ConflictContext context)
                          throws RepositoryException

Determines the effective scope of the dependency given by ConflictResolver.ConflictContext.getWinner(). Implementations will usually iterate ConflictResolver.ConflictContext.getItems(), inspect ConflictResolver.ConflictItem.getScopes() and eventually call ConflictResolver.ConflictContext.setScope(String) to deliver the effective scope.

Parameters:

context - the conflict context, must not be null

Throws:

RepositoryException - if the scope selection failed