ArtifactResolutionException.java

            catch ( ArtifactResolutionException e )
            {
                if ( e.getCause() instanceof ArtifactNotFoundException )
                {
                    missingDescriptor( session, trace, a, (Exception) e.getCause() );
                    if ( ( getPolicy( session, a, request ) & ArtifactDescriptorPolicy.IGNORE_MISSING ) != 0 )
                    {
                        return null;
                    }
                }
                result.addException( e );
                throw new ArtifactDescriptorException( result );
            }

============================0

            catch ( org.eclipse.aether.resolution.ArtifactResolutionException e )
            {
                if ( e.getCause() instanceof org.eclipse.aether.transfer.ArtifactNotFoundException )
                {
                    throw new ArtifactNotFoundException( e.getMessage(), artifact, remoteRepositories, e );
                }
                else
                {
                    throw new ArtifactResolutionException( e.getMessage(), artifact, remoteRepositories, e );
                }
            }


=============================

        catch ( org.eclipse.aether.resolution.ArtifactResolutionException e )
        {
            if ( e.getResults().get( 0 ).isMissing() && allowStubModel )
            {
                return build( null, createStubModelSource( artifact ), config );
            }
            throw new ProjectBuildingException( artifact.getId(),
                                                "Error resolving project artifact: " + e.getMessage(), e );
        }

==============================

    private void process( DefaultDependencyResolutionResult result, Collection<ArtifactResult> results )
    {
        for ( ArtifactResult ar : results )
        {
            DependencyNode node = ar.getRequest().getDependencyNode();
            if ( ar.isResolved() )
            {
                result.addResolvedDependency( node.getDependency() );
            }
            else
            {
                result.setResolutionErrors( node.getDependency(), ar.getExceptions() );
            }
        }
    }


==============================

            if (e.getCause() instanceof ArtifactNotFoundException) {
                throw new SiteToolException("The skin does not exist", e.getCause());
            }