How to use

createSearchCursor

method

in

org.apache.hyracks.storage.am.lsm.common.api.ILSMIndexAccessor

public void open() throws HyracksDataException {
  // Open the index and get the instance
  indexDataflowHelper.open();
  index = (ExternalBTree) indexDataflowHelper.getIndexInstance();
  // Create search key and search predicate objects
  searchKey = new ArrayTupleReference();
  searchKeyTupleBuilder = new ArrayTupleBuilder(FilesIndexDescription.FILE_KEY_SIZE);
  searchKeyTupleBuilder.reset();
  searchKeyTupleBuilder.addField(intSerde, currentFileNumber);
  searchKey.reset(searchKeyTupleBuilder.getFieldEndOffsets(), searchKeyTupleBuilder.getByteArray());
  MultiComparator searchCmp = BTreeUtils.getSearchMultiComparator(index.getComparatorFactories(), searchKey);
  searchPredicate = new RangePredicate(searchKey, searchKey, true, true, searchCmp, searchCmp);
  // create the accessor  and the cursor using the passed version
  ISearchOperationCallback searchCallback = searchCallbackFactory
      .createSearchOperationCallback(indexDataflowHelper.getResource().getId(), ctx, null);
  fileIndexAccessor = index.createAccessor(searchCallback, version);
  fileIndexSearchCursor = fileIndexAccessor.createSearchCursor(false);
}

Assert.assertEquals("Check disk components", 3, btree.getDiskComponents().size());
IIndexCursor cursor = accessor.createSearchCursor(false);
accessor.scanDiskComponents(cursor);