func HandleGet(fn Handler, key cas.Key, typ string, level uint8) (*chunks.Chunk, error) {
if key.IsSpecial() {
if key == cas.Empty {
chunk := MakeChunk(typ, level, nil)
return chunk, nil
}
return nil, cas.NotFound{
Type: typ,
Level: level,
Key: key,
}
}
data, err := fn(key, typ, level)
if err != nil {
return nil, err
}
if data == nil {
return nil, cas.NotFound{
Type: typ,
Level: level,
Key: key,
}
}
chunk := MakeChunk(typ, level, data)
return chunk, nil
}
