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);