| /* |
| * Copyright 2009-2010 by The Regents of the University of California |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * you may obtain a copy of the License from |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package edu.uci.ics.hyracks.storage.am.lsm.invertedindex.ondisk; |
| |
| import edu.uci.ics.hyracks.storage.am.btree.impls.BTree; |
| import edu.uci.ics.hyracks.storage.am.btree.impls.RangePredicate; |
| import edu.uci.ics.hyracks.storage.am.common.api.IIndexAccessor; |
| import edu.uci.ics.hyracks.storage.am.common.api.IIndexCursor; |
| import edu.uci.ics.hyracks.storage.am.common.api.IIndexOperationContext; |
| import edu.uci.ics.hyracks.storage.am.common.impls.NoOpOperationCallback; |
| import edu.uci.ics.hyracks.storage.am.common.ophelpers.IndexOperation; |
| import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator; |
| |
| public class OnDiskInvertedIndexOpContext implements IIndexOperationContext { |
| |
| public final RangePredicate btreePred = new RangePredicate(null, null, true, true, null, null); |
| public IIndexAccessor btreeAccessor; |
| public IIndexCursor btreeCursor; |
| public MultiComparator searchCmp; |
| // For prefix search on partitioned indexes. |
| public MultiComparator prefixSearchCmp; |
| |
| public OnDiskInvertedIndexOpContext(BTree btree) { |
| // TODO: Ignore opcallbacks for now. |
| btreeAccessor = btree.createAccessor(NoOpOperationCallback.INSTANCE, NoOpOperationCallback.INSTANCE); |
| btreeCursor = btreeAccessor.createSearchCursor(); |
| searchCmp = MultiComparator.createIgnoreFieldLength(btree.getComparatorFactories()); |
| if (btree.getComparatorFactories().length > 1) { |
| prefixSearchCmp = MultiComparator.create(btree.getComparatorFactories(), 0, 1); |
| } |
| } |
| |
| @Override |
| public void reset() { |
| // Nothing to be done here, only search operation supported. |
| } |
| |
| @Override |
| public void setOperation(IndexOperation newOp) { |
| // Nothing to be done here, only search operation supported. |
| } |
| |
| @Override |
| public IndexOperation getOperation() { |
| return IndexOperation.SEARCH; |
| } |
| } |