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writer : W) -> Result<(), Box> + where W : Write { + for a in self.entries.iter(){ + let d = bson::to_document(a)?; + d.to_writer(&mut writer)?; + } + Ok(()) + } + +} + +impl Collection +where +T: DeserializeOwned +{ + fn load(&mut self, mut file: File) -> Result<(), Box>{ + let n = file.metadata()?.len(); + let mut reader = BufReader::new(file); + let mut current_position = reader.stream_position()?; + while current_position < n{ + let d = Document::from_reader(&mut reader)?; + let h: T = bson::from_document(d)?; + self.entries.push(h); + current_position = reader.stream_position()?; + } + Ok(()) + + } +} \ No newline at end of file