hyracks-storage-am-rtree/src/main/java/edu/uci/ics/hyracks/storage/am/rtree/dataflow/RTreeOpHelper.java

/*
 * 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.rtree.dataflow;

import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
import edu.uci.ics.hyracks.api.dataflow.value.IBinaryComparator;
import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
import edu.uci.ics.hyracks.storage.am.common.api.IFreePageManager;
import edu.uci.ics.hyracks.storage.am.common.api.IPrimitiveValueProvider;
import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndex;
import edu.uci.ics.hyracks.storage.am.common.api.ITreeIndexMetaDataFrameFactory;
import edu.uci.ics.hyracks.storage.am.common.dataflow.ITreeIndexOperatorDescriptorHelper;
import edu.uci.ics.hyracks.storage.am.common.dataflow.IndexHelperOpenMode;
import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexOpHelper;
import edu.uci.ics.hyracks.storage.am.common.frames.LIFOMetaDataFrameFactory;
import edu.uci.ics.hyracks.storage.am.common.freepage.LinkedListFreePageManager;
import edu.uci.ics.hyracks.storage.am.common.ophelpers.MultiComparator;
import edu.uci.ics.hyracks.storage.am.rtree.impls.RTree;
import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;

public class RTreeOpHelper extends TreeIndexOpHelper {

	public RTreeOpHelper(ITreeIndexOperatorDescriptorHelper opDesc,
			IHyracksTaskContext ctx, int partition, IndexHelperOpenMode mode) {
		super(opDesc, ctx, partition, mode);
	}

	public ITreeIndex createTreeIndex() throws HyracksDataException {
		IBufferCache bufferCache = opDesc.getStorageManager().getBufferCache(
				ctx);
		ITreeIndexMetaDataFrameFactory metaDataFrameFactory = new LIFOMetaDataFrameFactory();
		IFreePageManager freePageManager = new LinkedListFreePageManager(
				bufferCache, indexFileId, 0, metaDataFrameFactory);

		return new RTree(bufferCache, freePageManager,
				opDesc.getTreeIndexInteriorFactory(),
				opDesc.getTreeIndexLeafFactory(), cmp);
	}

	public MultiComparator createMultiComparator(IBinaryComparator[] comparators)
			throws HyracksDataException {
		IPrimitiveValueProvider[] keyValueProvider = new IPrimitiveValueProvider[opDesc
				.getTreeIndexValueProviderFactories().length];
		for (int i = 0; i < opDesc.getTreeIndexComparatorFactories().length; i++) {
			keyValueProvider[i] = opDesc.getTreeIndexValueProviderFactories()[i]
					.createPrimitiveValueProvider();
		}
		return new MultiComparator(opDesc.getTreeIndexTypeTraits(),
				comparators, keyValueProvider);
	}
}