hyracks/hyracks-storage-am-invertedindex/src/main/java/edu/uci/ics/hyracks/storage/am/invertedindex/dataflow/InvertedIndexCreateOperatorNodePushable.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.invertedindex.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;
import edu.uci.ics.hyracks.storage.am.common.dataflow.TreeIndexDataflowHelper;

public class InvertedIndexCreateOperatorNodePushable extends AbstractOperatorNodePushable {
    private final TreeIndexDataflowHelper btreeDataflowHelper;
    private final InvertedIndexDataflowHelper invIndexDataflowHelper;

    public InvertedIndexCreateOperatorNodePushable(AbstractInvertedIndexOperatorDescriptor opDesc,
            IHyracksTaskContext ctx, int partition) {
        btreeDataflowHelper = (TreeIndexDataflowHelper) opDesc.getIndexDataflowHelperFactory()
                .createIndexDataflowHelper(opDesc, ctx, partition);
        invIndexDataflowHelper = new InvertedIndexDataflowHelper(btreeDataflowHelper, opDesc, ctx, partition);
    }

    @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 {
    	// BTree.
    	try {
    		btreeDataflowHelper.init(true);
    	} finally {
    		btreeDataflowHelper.deinit();
    	}
    	// Inverted Index.
    	try {
    		invIndexDataflowHelper.init(true);
    	} finally {
    		invIndexDataflowHelper.deinit();
    	}
    }

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