//
// writeEmbeddedMap serializes the EMBEDDEDMAP type. Currently, OrientDB only uses string
// types for the map keys, so that is an assumption of this method as well.
//
func (serde ORecordSerializerV0) writeEmbeddedMap(buf *obuf.WriteBuf, m oschema.OEmbeddedMap) error {
// number of entries in the map
err := varint.EncodeAndWriteVarInt32(buf, int32(m.Len()))
if err != nil {
return oerror.NewTrace(err)
}
ptrPos := make([]int, 0, m.Len()) // position in buf where data ptr int needs to be written
// TODO: do the map entries have to be written in any particular order? I will assume no for now
keys, vals, types := m.All()
/* ---[ write embedded map header ]--- */
for i, k := range keys {
// key type
err = rw.WriteByte(buf, byte(oschema.STRING))
if err != nil {
return oerror.NewTrace(err)
}
// write the key value
err = varint.WriteString(buf, k)
if err != nil {
return oerror.NewTrace(err)
}
ptrPos = append(ptrPos, buf.Len())
buf.Skip(4) // placeholder integer for data ptr
dataType := types[i]
if dataType == oschema.UNKNOWN {
dataType = getDataType(vals[i]) // TODO: not sure this is necessary
}
// write data type of the data
err = rw.WriteByte(buf, byte(dataType))
if err != nil {
return oerror.NewTrace(err)
}
}
/* ---[ write embedded map data values ]--- */
for i := 0; i < len(vals); i++ {
currPos := buf.Len()
buf.Seek(uint(ptrPos[i]))
err = rw.WriteInt(buf, int32(currPos))
if err != nil {
return oerror.NewTrace(err)
}
buf.Seek(uint(currPos))
err = serde.writeDataValue(buf, vals[i], types[i])
if err != nil {
return oerror.NewTrace(err)
}
}
return nil
}
//
// serializeDocument writes the classname and the serialized record
// (header and data sections) of the ODocument to the obuf.WriteBuf.
//
// Because this method writes the classname but NOT the serialization
// version, this method is safe for recursive calls for EMBEDDED types.
//
func (serde ORecordSerializerV0) serializeDocument(wbuf *obuf.WriteBuf, doc *oschema.ODocument) error {
err := varint.WriteString(wbuf, doc.Classname)
if err != nil {
return oerror.NewTrace(err)
}
ogl.Debugf("serdebuf A: %v\n", wbuf.Bytes()) // DEBUG
ogl.Debugf("doc A: %v\n", doc) // DEBUG
return serde.writeSerializedRecord(wbuf, doc)
}
//
// Serialization format for EMBEDDEDLIST and EMBEDDEDSET
// +-------------+------------+-------------------+
// |size:varInt | type:Otype | items:item_data[] |
// +-------------+------------+-------------------+
//
// The item_data data structure is:
// +------------------+--------------+
// | data_type:OType | data:byte[] |
// +------------------+--------------+
//
func (serde ORecordSerializerV0) serializeEmbeddedCollection(buf *obuf.WriteBuf, ls oschema.OEmbeddedList) error {
err := varint.EncodeAndWriteVarInt32(buf, int32(ls.Len()))
if err != nil {
return oerror.NewTrace(err)
}
// following the lead of the Java driver, you don't specify the type of the list overall
// (I tried to and it doesn't work, at least with OrientDB-2.0.1)
err = rw.WriteByte(buf, byte(oschema.ANY))
if err != nil {
return oerror.NewTrace(err)
}
for _, val := range ls.Values() {
buf.WriteByte(byte(ls.Type()))
err = serde.writeDataValue(buf, val, ls.Type())
if err != nil {
return oerror.NewTrace(err)
}
}
return nil
}
//
// In Progress attempt to rewrite writeSerializedRecord and related fns
// using a seekable/skipping WriteBuf
//
func (serde ORecordSerializerV0) writeSerializedRecord(wbuf *obuf.WriteBuf, doc *oschema.ODocument) (err error) {
nfields := len(doc.FieldNames())
ptrPos := make([]int, 0, nfields) // position in buf where data ptr int needs to be written
currDB := serde.dbc.GetCurrDB()
oclass, ok := currDB.Classes[doc.Classname]
docFields := doc.GetFields()
for _, fld := range docFields {
var oprop *oschema.OProperty
if ok {
oprop = oclass.Properties[fld.Name]
}
// FROM THE JAVA CLIENT:
// if (properties[i] != null) {
// OVarIntSerializer.write(bytes, (properties[i].getId() + 1) * -1);
// if (properties[i].getType() != OType.ANY)
// pos[i] = bytes.alloc(OIntegerSerializer.INT_SIZE);
// else
// pos[i] = bytes.alloc(OIntegerSerializer.INT_SIZE + 1); // TODO: why does ANY required an additional byte?
// } else {
// writeString(bytes, entry.getKey());
// pos[i] = bytes.alloc(OIntegerSerializer.INT_SIZE + 1);
if oprop != nil {
// if property is known in the global properties, then
// just write its encoded id
varint.EncodeAndWriteVarInt32(wbuf, encodeFieldIDForHeader(oprop.ID))
ptrPos = append(ptrPos, wbuf.Len())
wbuf.Skip(4)
// Note: no need to write property type when writing property ID
} else {
// property Name
err = varint.WriteString(wbuf, fld.Name)
if err != nil {
return oerror.NewTrace(err)
}
ptrPos = append(ptrPos, wbuf.Len())
wbuf.Skip(4)
// property Type
err = rw.WriteByte(wbuf, byte(fld.Type))
if err != nil {
return oerror.NewTrace(err)
}
}
}
wbuf.WriteByte(0) // End of Header sentinel
// now write out the data values
for i, fld := range docFields {
currPos := wbuf.Len()
wbuf.Seek(uint(ptrPos[i]))
err = rw.WriteInt(wbuf, int32(currPos))
if err != nil {
return oerror.NewTrace(err)
}
wbuf.Seek(uint(currPos))
err = serde.writeDataValue(wbuf, fld.Value, fld.Type)
if err != nil {
return oerror.NewTrace(err)
}
}
return nil
}
