func edgeKindLess(kind1, kind2 string) bool {
// General ordering:
// anchor edge kinds before non-anchor edge kinds
// forward edges before reverse edges
// edgeOrdering[i] (and variants) before edgeOrdering[i+1:]
// edge variants after root edge kind (ordered lexicographically)
// otherwise, order lexicographically
if kind1 == kind2 {
return false
} else if a1, a2 := schema.IsAnchorEdge(kind1), schema.IsAnchorEdge(kind2); a1 != a2 {
return a1
} else if d1, d2 := schema.EdgeDirection(kind1), schema.EdgeDirection(kind2); d1 != d2 {
return d1 == schema.Forward
}
kind1, kind2 = schema.Canonicalize(kind1), schema.Canonicalize(kind2)
for _, kind := range edgeOrdering {
if kind1 == kind {
return true
} else if kind2 == kind {
return false
} else if v1, v2 := schema.IsEdgeVariant(kind1, kind), schema.IsEdgeVariant(kind2, kind); v1 != v2 {
return v1
} else if v1 {
return kind1 < kind2
}
}
return kind1 < kind2
}
func isRefKind(requestedKind xpb.CrossReferencesRequest_ReferenceKind, edgeKind string) bool {
switch requestedKind {
case xpb.CrossReferencesRequest_NO_REFERENCES:
return false
case xpb.CrossReferencesRequest_ALL_REFERENCES:
return schema.IsEdgeVariant(edgeKind, revRefEdge)
default:
panic("unhandled CrossReferencesRequest_ReferenceKind")
}
}
func isDocKind(requestedKind xpb.CrossReferencesRequest_DocumentationKind, edgeKind string) bool {
switch requestedKind {
case xpb.CrossReferencesRequest_NO_DOCUMENTATION:
return false
case xpb.CrossReferencesRequest_ALL_DOCUMENTATION:
return schema.IsEdgeVariant(edgeKind, revDocumentsEdge)
default:
panic("unhandled CrossDocumentationRequest_DocumentationKind")
}
}
func isDefKind(requestedKind xpb.CrossReferencesRequest_DefinitionKind, edgeKind string) bool {
switch requestedKind {
case xpb.CrossReferencesRequest_NO_DEFINITIONS:
return false
case xpb.CrossReferencesRequest_FULL_DEFINITIONS:
return edgeKind == revDefinesEdge
case xpb.CrossReferencesRequest_BINDING_DEFINITIONS:
return edgeKind == revDefinesBindingEdge
case xpb.CrossReferencesRequest_ALL_DEFINITIONS:
return schema.IsEdgeVariant(edgeKind, revDefinesEdge)
default:
panic("unhandled CrossReferencesRequest_DefinitionKind")
}
}