// Convert implements the Converter interface for JSON input. It converts a
// JSONConverter struct to a BSON document.
func (c JSONConverter) Convert() (bson.D, error) {
document, err := json.UnmarshalBsonD(c.data)
if err != nil {
return nil, fmt.Errorf("error unmarshaling bytes on document #%v: %v", c.index, err)
}
log.Logvf(log.DebugHigh, "got line: %v", document)
bsonD, err := bsonutil.GetExtendedBsonD(document)
if err != nil {
return nil, fmt.Errorf("error getting extended BSON for document #%v: %v", c.index, err)
}
log.Logvf(log.DebugHigh, "got extended line: %#v", bsonD)
return bsonD, nil
}
// MetadataFromJSON takes a slice of JSON bytes and unmarshals them into usable
// collection options and indexes for restoring collections.
func (restore *MongoRestore) MetadataFromJSON(jsonBytes []byte) (bson.D, []IndexDocument, error) {
if len(jsonBytes) == 0 {
// skip metadata parsing if the file is empty
return nil, nil, nil
}
meta := &Metadata{}
err := json.Unmarshal(jsonBytes, meta)
if err != nil {
return nil, nil, err
}
// first get the ordered key information for each index,
// then merge it with a set of options stored as a map
metaAsMap := metaDataMapIndex{}
err = json.Unmarshal(jsonBytes, &metaAsMap)
if err != nil {
return nil, nil, fmt.Errorf("error unmarshalling metadata as map: %v", err)
}
for i := range meta.Indexes {
// remove "key" from the map so we can decode it properly later
delete(metaAsMap.Indexes[i], "key")
// parse extra index fields
meta.Indexes[i].Options = metaAsMap.Indexes[i]
if err := bsonutil.ConvertJSONDocumentToBSON(meta.Indexes[i].Options); err != nil {
return nil, nil, fmt.Errorf("extended json error: %v", err)
}
// parse the values of the index keys, so we can support extended json
for pos, field := range meta.Indexes[i].Key {
meta.Indexes[i].Key[pos].Value, err = bsonutil.ParseJSONValue(field.Value)
if err != nil {
return nil, nil, fmt.Errorf("extended json in '%v' field: %v", field.Name, err)
}
}
}
// parse the values of options fields, to support extended json
meta.Options, err = bsonutil.GetExtendedBsonD(meta.Options)
if err != nil {
return nil, nil, fmt.Errorf("extended json in 'options': %v", err)
}
return meta.Options, meta.Indexes, nil
}