Method deserialize

src/models/tf_idf_index.rs:369–401

(root_path: PathBuf)

    }

    pub fn deserialize(root_path: PathBuf) -> Result<Self, BufIoError> {
        let dim_file = OpenOptions::new()
            .read(true)
            .write(true)
            .create(true)
            .truncate(false)
            .open(root_path.join("index-tree.dim"))?;
        let node_size = TFIDFIndexNode::get_serialized_size();
        let dim_bufman = Arc::new(BufferManager::new(dim_file, node_size as usize * 1000)?);
        let offset_counter = AtomicU32::new(dim_bufman.file_size() as u32);
        let data_bufmans = Arc::new(BufferManagerFactory::new(
            root_path.clone().into(),
            |root, version: &VersionNumber| root.join(format!("{}.idat", **version)),
            8192,
        ));
        let cache = TFIDFIndexCache::new(dim_bufman, data_bufmans, offset_counter);
        let root = TFIDFIndexNode::deserialize(
            &cache.dim_bufman,
            &cache.data_bufmans,
            FileOffset(4),
            VersionNumber::from(u32::MAX), // not used
            &cache,
        )?;
        let cursor = cache.dim_bufman.open_cursor()?;
        let total_documents_count = AtomicU32::new(cache.dim_bufman.read_u32_with_cursor(cursor)?);
        cache.dim_bufman.close_cursor(cursor)?;

        Ok(Self {
            root,
            cache,
            total_documents_count,
        })
    }
}