Examples with BTreeIndex io.hetu.core.plugin.heuristicindex.index.btree.BTreeIndex used on opensource projects

Example 1 with BTreeIndex

use of io.hetu.core.plugin.heuristicindex.index.btree.BTreeIndex in project hetu-core by openlookeng.

the class HeuristicIndexClient method readPartitionIndex.

@Override
public List<IndexMetadata> readPartitionIndex(String path) throws IOException {
    Path indexKeyPath = Paths.get(path);
    Path absolutePath = Paths.get(this.root.toString(), path);
    String tableName = indexKeyPath.subpath(0, 1).toString();
    String column = indexKeyPath.subpath(1, 2).toString();
    List<IndexMetadata> result = new ArrayList<>();
    if (fs.exists(absolutePath)) {
        List<Path> paths = fs.walk(absolutePath).filter(p -> !fs.isDirectory(p)).collect(Collectors.toList());
        for (Path filePath : paths) {
            BTreeIndex index = new BTreeIndex();
            InputStream inputStream = fs.newInputStream(filePath);
            index.deserialize(inputStream);
            IndexMetadata indexMetadata = new IndexMetadata(index, tableName, new String[] { column }, root.toString(), filePath.toString(), 0L, 0L);
            result.add(indexMetadata);
        }
        return result;
    } else {
        LOG.debug("File path doesn't exists" + absolutePath);
        return ImmutableList.of();
    }
}