7d18978492
This is a shortcut for those that are not using the label field. It can become very verbose always calling Quad with an empty string as the last parameter.
57 lines
1.2 KiB
Go
57 lines
1.2 KiB
Go
package cayley
|
|
|
|
import (
|
|
"github.com/google/cayley/graph"
|
|
_ "github.com/google/cayley/graph/memstore"
|
|
"github.com/google/cayley/graph/path"
|
|
"github.com/google/cayley/quad"
|
|
_ "github.com/google/cayley/writer"
|
|
)
|
|
|
|
type Iterator graph.Iterator
|
|
type QuadStore graph.QuadStore
|
|
type QuadWriter graph.QuadWriter
|
|
|
|
type Path path.Path
|
|
|
|
var (
|
|
StartMorphism = path.StartMorphism
|
|
StartPath = path.StartPath
|
|
|
|
RawNext = graph.Next
|
|
NewTransaction = graph.NewTransaction
|
|
)
|
|
|
|
type Handle struct {
|
|
graph.QuadStore
|
|
graph.QuadWriter
|
|
}
|
|
|
|
func Triple(subject, predicate, object string) quad.Quad {
|
|
return quad.Quad{subject, predicate, object, ""}
|
|
}
|
|
|
|
func Quad(subject, predicate, object, label string) quad.Quad {
|
|
return quad.Quad{subject, predicate, object, label}
|
|
}
|
|
|
|
func NewGraph(name, dbpath string, opts graph.Options) (*Handle, error) {
|
|
qs, err := graph.NewQuadStore(name, dbpath, opts)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
qw, err := graph.NewQuadWriter("single", qs, nil)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &Handle{qs, qw}, nil
|
|
}
|
|
|
|
func NewMemoryGraph() (*Handle, error) {
|
|
return NewGraph("memstore", "", nil)
|
|
}
|
|
|
|
func (h *Handle) Close() {
|
|
h.QuadStore.Close()
|
|
h.QuadWriter.Close()
|
|
}
|