Beispiel #1
0
// unmarshalFact decodes a fact from it's binary representation. The domain and
// transaction ID are passed in since they are not encoded with the fact itself.
// This is because facts are stored relative to a domain and a transaction.
func unmarshalFact(m *ProtoFact, b []byte, d string, t uint64, f *origins.Fact) error {
	m.Reset()

	if err := proto.Unmarshal(b, m); err != nil {
		return err
	}

	f.Domain = d
	f.Transaction = t

	f.Entity = &origins.Ident{
		Domain: m.GetEntityDomain(),
		Name:   m.GetEntity(),
	}

	f.Attribute = &origins.Ident{
		Domain: m.GetAttributeDomain(),
		Name:   m.GetAttribute(),
	}

	f.Value = &origins.Ident{
		Domain: m.GetValueDomain(),
		Name:   m.GetValue(),
	}

	f.Time = chrono.MicroTime(m.GetTime())

	if m.GetAdded() {
		f.Operation = origins.Assertion
	} else {
		f.Operation = origins.Retraction
	}

	return nil
}
Beispiel #2
0
// Facts encodes the schema as facts. This is primarily used for programmatically
// creating a schema and then writing the facts to storage for later use.
func (s *Schema) Facts() origins.Facts {
	var (
		err    error
		attr   *Attribute
		fact   *origins.Fact
		facts  origins.Facts
		buf    = origins.NewBuffer(nil)
		entity *origins.Ident
	)

	for _, attr = range s.attrs {
		entity = &origins.Ident{
			Domain: attr.Domain,
			Name:   attr.Name,
		}

		if facts, err = origins.Reflect(attr); err != nil {
			panic(err)
		}

		for _, fact = range facts {
			fact.Domain = s.Domain
			fact.Entity = entity

			// Fill in the defaults.
			if fact.Attribute.Domain == "" {
				fact.Attribute.Domain = fact.Domain
			}

			buf.Write(fact)
		}
	}

	return buf.Facts()
}