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x_marshaler.go
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/
x_marshaler.go
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package birch
// Marshaler describes types that know how to marshal a document
// representation of themselves into bson. Do not use this interface
// for types that would marshal themselves into values.
type Marshaler interface {
MarshalBSON() ([]byte, error)
}
// Unmarshaler describes types that can take a byte slice
// representation of bson and poulate themselves from this data.
type Unmarshaler interface {
UnmarshalBSON([]byte) error
}
// DocumentMarshaler describes types that are able to produce Document
// represntations of themselves.
type DocumentMarshaler interface {
MarshalDocument() (*Document, error)
}
// DocumentUnmarshaler describes a type that can populate itself from
// a document.
type DocumentUnmarshaler interface {
UnmarshalDocument(*Document) error
}
// MarshalDocumentBSON provides a convience function to convert
// document marshalers directly to bson.
func MarshalDocumentBSON(dm DocumentMarshaler) ([]byte, error) {
doc, err := dm.MarshalDocument()
if err != nil {
return nil, err
}
out, err := doc.MarshalBSON()
if err != nil {
return nil, err
}
return out, nil
}