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package storage
import "io"
// Storage implements an interface for reading, but not writing, objects in an
// object database.
type Storage interface {
// Open returns a handle on an existing object keyed by the given object
// ID. It returns an error if that file does not already exist.
Open(oid []byte) (f io.ReadCloser, err error)
// Close closes the filesystem, after which no more operations are
// allowed.
Close() error
// Compressed indicates whether data read from this storage source will
// be zlib-compressed.
IsCompressed() bool
}
// WritableStorage implements an interface for reading and writing objects in
// an object database.
type WritableStorage interface {
Storage
// Store copies the data given in "r" to the unique object path given by
// "oid". It returns an error if that file already exists (acting as if
// the `os.O_EXCL` mode is given in a bitmask to os.Open).
Store(oid []byte, r io.Reader) (n int64, err error)
}
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