Method set_data

parquet/src/column/reader/decoder.rs:199–229

(
        &mut self,
        mut encoding: Encoding,
        data: Bytes,
        num_levels: usize,
        num_values: Option<usize>,
    )

    }

    fn set_data(
        &mut self,
        mut encoding: Encoding,
        data: Bytes,
        num_levels: usize,
        num_values: Option<usize>,
    ) -> Result<()> {
        if encoding == Encoding::PLAIN_DICTIONARY {
            encoding = Encoding::RLE_DICTIONARY;
        }

        let decoder = if encoding == Encoding::RLE_DICTIONARY {
            self.decoders[encoding as usize]
                .as_mut()
                .expect("Decoder for dict should have been set")
        } else {
            let slot = encoding as usize;
            if self.decoders[slot].is_none() {
                let data_decoder = get_decoder::<T>(self.descr.clone(), encoding)?;
                self.decoders[slot] = Some(data_decoder);
                self.decoder_mask.insert(encoding);
            }
            self.decoders[slot]
                .as_mut()
                .expect("decoder should have been inserted")
        };

        decoder.set_data(data, num_values.unwrap_or(num_levels))?;
        self.current_encoding = Some(encoding);
        Ok(())
    }

    fn read(&mut self, out: &mut Self::Buffer, num_values: usize) -> Result<usize> {
        let encoding = self