forked from cayleygraph/cayley
/
quad.go
191 lines (180 loc) · 4.23 KB
/
quad.go
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package proto
import (
"fmt"
"time"
"github.com/cayleygraph/cayley/quad"
)
// MakeValue converts quad.Value to its protobuf representation.
func MakeValue(qv quad.Value) *Value {
if qv == nil {
return nil
}
switch v := qv.(type) {
case quad.Raw:
return &Value{&Value_Raw{[]byte(v)}}
case quad.String:
return &Value{&Value_Str{string(v)}}
case quad.IRI:
return &Value{&Value_Iri{string(v)}}
case quad.BNode:
return &Value{&Value_Bnode{string(v)}}
case quad.TypedString:
return &Value{&Value_TypedStr{&Value_TypedString{
Value: string(v.Value),
Type: string(v.Type),
}}}
case quad.LangString:
return &Value{&Value_LangStr{&Value_LangString{
Value: string(v.Value),
Lang: v.Lang,
}}}
case quad.Int:
return &Value{&Value_Int{int64(v)}}
case quad.Float:
return &Value{&Value_Float_{float64(v)}}
case quad.Bool:
return &Value{&Value_Boolean{bool(v)}}
case quad.Time:
t := time.Time(v)
seconds := t.Unix()
nanos := int32(t.Sub(time.Unix(seconds, 0)))
return &Value{&Value_Time{&Value_Timestamp{
Seconds: seconds,
Nanos: nanos,
}}}
default:
panic(fmt.Errorf("unsupported type: %T", qv))
}
}
// MarshalValue is a helper for serialization of quad.Value.
func MarshalValue(v quad.Value) ([]byte, error) {
if v == nil {
return nil, nil
}
return MakeValue(v).Marshal()
}
// UnmarshalValue is a helper for deserialization of quad.Value.
func UnmarshalValue(data []byte) (quad.Value, error) {
if len(data) == 0 {
return nil, nil
}
var v Value
if err := v.Unmarshal(data); err != nil {
return nil, err
}
return v.ToNative(), nil
}
// ToNative converts protobuf Value to quad.Value.
func (m *Value) ToNative() (qv quad.Value) {
if m == nil {
return nil
}
switch v := m.Value.(type) {
case *Value_Raw:
return quad.Raw(v.Raw)
case *Value_Str:
return quad.String(v.Str)
case *Value_Iri:
return quad.IRI(v.Iri)
case *Value_Bnode:
return quad.BNode(v.Bnode)
case *Value_TypedStr:
return quad.TypedString{
Value: quad.String(v.TypedStr.Value),
Type: quad.IRI(v.TypedStr.Type),
}
case *Value_LangStr:
return quad.LangString{
Value: quad.String(v.LangStr.Value),
Lang: v.LangStr.Lang,
}
case *Value_Int:
return quad.Int(v.Int)
case *Value_Float_:
return quad.Float(v.Float_)
case *Value_Boolean:
return quad.Bool(v.Boolean)
case *Value_Time:
var t time.Time
if v.Time == nil {
t = time.Unix(0, 0).UTC()
} else {
t = time.Unix(v.Time.Seconds, int64(v.Time.Nanos)).UTC()
}
return quad.Time(t)
default:
panic(fmt.Errorf("unsupported type: %T", m.Value))
}
}
// GetNativeValue returns the value stored in Node.
func (m *NodeData) GetNativeValue() quad.Value {
if m == nil {
return nil
} else if m.Value == nil {
if m.Name == "" {
return nil
}
return quad.Raw(m.Name)
}
return m.Value.ToNative()
}
func (m *NodeData) Upgrade() {
if m.Value == nil {
m.Value = MakeValue(quad.Raw(m.Name))
m.Name = ""
}
}
// MakeQuad converts quad.Quad to its protobuf representation.
func MakeQuad(q quad.Quad) *Quad {
return &Quad{
SubjectValue: MakeValue(q.Subject),
PredicateValue: MakeValue(q.Predicate),
ObjectValue: MakeValue(q.Object),
LabelValue: MakeValue(q.Label),
}
}
// ToNative converts protobuf Quad to quad.Quad.
func (m *Quad) ToNative() (q quad.Quad) {
if m == nil {
return
}
if m.SubjectValue != nil {
q.Subject = m.SubjectValue.ToNative()
} else if m.Subject != "" {
q.Subject = quad.Raw(m.Subject)
}
if m.PredicateValue != nil {
q.Predicate = m.PredicateValue.ToNative()
} else if m.Predicate != "" {
q.Predicate = quad.Raw(m.Predicate)
}
if m.ObjectValue != nil {
q.Object = m.ObjectValue.ToNative()
} else if m.Object != "" {
q.Object = quad.Raw(m.Object)
}
if m.LabelValue != nil {
q.Label = m.LabelValue.ToNative()
} else if m.Label != "" {
q.Label = quad.Raw(m.Label)
}
return
}
func (m *Quad) Upgrade() {
if m.SubjectValue == nil {
m.SubjectValue = MakeValue(quad.Raw(m.Subject))
m.Subject = ""
}
if m.PredicateValue == nil {
m.PredicateValue = MakeValue(quad.Raw(m.Predicate))
m.Predicate = ""
}
if m.ObjectValue == nil {
m.ObjectValue = MakeValue(quad.Raw(m.Object))
m.Object = ""
}
if m.LabelValue == nil && m.Label != "" {
m.LabelValue = MakeValue(quad.Raw(m.Label))
m.Label = ""
}
}