hyracks-storage-am-common/src/main/java/edu/uci/ics/hyracks/storage/am/common/dataflow/TreeIndexFileEnlistmentOperatorNodePushable.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.common.dataflow;

import edu.uci.ics.hyracks.api.comm.IFrameWriter;
import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
import edu.uci.ics.hyracks.api.dataflow.value.RecordDescriptor;
import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
import edu.uci.ics.hyracks.dataflow.std.base.AbstractOperatorNodePushable;

public class TreeIndexFileEnlistmentOperatorNodePushable extends
		AbstractOperatorNodePushable {

	private final TreeIndexOpHelper treeIndexOpHelper;

	public TreeIndexFileEnlistmentOperatorNodePushable(
			AbstractTreeIndexOperatorDescriptor opDesc,
			IHyracksTaskContext ctx, int partition) {
		treeIndexOpHelper = opDesc.getTreeIndexOpHelperFactory()
				.createTreeIndexOpHelper(opDesc, ctx, partition,
						IndexHelperOpenMode.ENLIST);
	}

	@Override
	public void deinitialize() throws HyracksDataException {
	}

	@Override
	public int getInputArity() {
		return 0;
	}

	@Override
	public IFrameWriter getInputFrameWriter(int index) {
		return null;
	}

	@Override
	public void initialize() throws HyracksDataException {
		try {
			treeIndexOpHelper.init();
		} finally {
			treeIndexOpHelper.deinit();
		}
	}

	@Override
	public void setOutputFrameWriter(int index, IFrameWriter writer,
			RecordDescriptor recordDesc) {
	}
}