Class LatestCompatibleConflictManager

  • All Implemented Interfaces:
    ConflictManager, IvySettingsAware

    public class LatestCompatibleConflictManager
    extends LatestConflictManager
    This conflict manager can be used to allow only compatible dependencies to be used together (like the strict conflict manager), but it has the advantage of using a best effort algorithm to find a set of compatible dependencies, even if it requires stepping back to older revisions (as long as they are in the set of compatibility).

    Here is an example of what this conflict manager is able to do:

    Available Modules:
     #A;2->{ #B;[1.0,1.5] #C;[2.0,2.5] }
     #B;1.4->#D;1.5
     #B;1.5->#D;2.0
     #C;2.5->#D;[1.0,1.6]
     
    Result: #B;1.4, #C;2.5, #D;1.5

    DetailsThe conflict manager finds that the latest matching version of #B (1.5) depends on a version of #D incompatible with what is expected by the latest matching version of #C. Hence the conflict manager blacklists #B;1.5, and the version range [1.0,1.5] is resolved again to end up with #B;1.4 which depends on #D;1.5, which is fine to work with #C;2.5.

    • Constructor Detail

      • LatestCompatibleConflictManager

        public LatestCompatibleConflictManager()
      • LatestCompatibleConflictManager

        public LatestCompatibleConflictManager​(java.lang.String name,
                                               LatestStrategy strategy)
    • Method Detail

      • resolveConflicts

        public java.util.Collection<IvyNode> resolveConflicts​(IvyNode parent,
                                                              java.util.Collection<IvyNode> conflicts)
        Description copied from interface: ConflictManager
        Resolves the eventual conflicts found in the given collection of IvyNode. This method return a Collection of IvyNode which have not been evicted. The given conflicts Collection contains at least one IvyNode. This method can be called with IvyNodes which are not yet loaded. If this conflict manager is not able to resolve conflicts with the current data found in the IvyNodes and need them to be fully loaded, it will return null to indicate that no conflict resolution has been done.
        Specified by:
        resolveConflicts in interface ConflictManager
        Overrides:
        resolveConflicts in class LatestConflictManager
        Parameters:
        parent - the ivy node parent for which the conflict is to be resolved
        conflicts - the collection of IvyNode to check for conflicts
        Returns:
        a Collection of IvyNode which have not been evicted, or null if conflict management resolution is not possible yet
      • handleUnsolvableConflict

        protected void handleUnsolvableConflict​(IvyNode parent,
                                                java.util.Collection<IvyNode> conflicts,
                                                IvyNode node1,
                                                IvyNode node2)
      • handleAllBlacklistedRevisions

        public void handleAllBlacklistedRevisions​(DependencyDescriptor dd,
                                                  java.util.Collection<ModuleRevisionId> foundBlacklisted)
        Description copied from interface: ConflictManager
        Method called when all revisions available for a version constraint have been blacklisted, and thus the dependency can't be resolved.

        This will never happen if the conflict manager doesn't blacklist any module, so providing an empty implementation in this case is fine.

        Specified by:
        handleAllBlacklistedRevisions in interface ConflictManager
        Overrides:
        handleAllBlacklistedRevisions in class AbstractConflictManager
        Parameters:
        dd - the dependency descriptor for which all revisions are blacklisted.
        foundBlacklisted - the list of all ModuleRevisionId found which are blacklisted