getindexrequest elasticsearch

public List<String> getIndexListWithPrefix(Object object) {

    LOG.info("Retrieving index list with prefix: {}", object.toString());
    String[] indices = client.admin().indices().getIndex(new GetIndexRequest()).actionGet().getIndices();

    ArrayList<String> indexList = new ArrayList<>();
    int length = indices.length;
    for (int i = 0; i < length; i++) {
      String indexName = indices[i];
      if (indexName.startsWith(object.toString())) {
        indexList.add(indexName);
      }
    }

    return indexList;
  }GetIndexRequest request = new GetIndexRequest("index");