barak/cayley
1
0
Fork 0
Code Issues Pull requests Releases Wiki Activity

Alpha attempt at in and out predicates.

Browse source
This commit is contained in:
Allon Hadaya 2015-04-26 16:07:15 -04:00
parent 86ae24f59d
commit f775756ad1
3 changed files with 29 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

13
query/gremlin/build_iterator.go
View file

@ -139,6 +139,15 @@ func buildInOutIterator(obj *otto.Object, qs graph.QuadStore, base graph.Iterato
return iterator.NewHasA(qs, and, out)
}
func buildInOutPredicateIterator(obj *otto.Object, qs graph.QuadStore, base graph.Iterator, isReverse bool) graph.Iterator {
dir := quad.Subject
if isReverse {
dir = quad.Object
}
lto := iterator.NewLinksTo(qs, base, dir)
return iterator.NewHasA(qs, lto, quad.Predicate)
}
func buildIteratorTreeHelper(obj *otto.Object, qs graph.QuadStore, base graph.Iterator) graph.Iterator {
// TODO: Better error handling
var (
@ -315,6 +324,10 @@ func buildIteratorTreeHelper(obj *otto.Object, qs graph.QuadStore, base graph.It
and.AddSubIterator(subIt)
and.AddSubIterator(notIt)
it = and
case "in_predicates":
it = buildInOutPredicateIterator(obj, qs, subIt, true)
case "out_predicates":
it = buildInOutPredicateIterator(obj, qs, subIt, false)
}
if it == nil {
panic("Iterator building does not catch the output iterator in some case.")