asterixdb/asterix-external-data/src/main/java/org/apache/asterix/external/dataflow/IndexingDataFlowController.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 at
 *
 *   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 org.apache.asterix.external.dataflow;

import java.io.IOException;

import org.apache.asterix.external.api.IExternalIndexer;
import org.apache.asterix.external.api.IRecordDataParser;
import org.apache.asterix.external.api.IRecordReader;
import org.apache.hyracks.api.context.IHyracksTaskContext;
import org.apache.hyracks.api.exceptions.HyracksDataException;
import org.apache.hyracks.dataflow.common.comm.io.ArrayTupleBuilder;

public class IndexingDataFlowController<T> extends RecordDataFlowController<T> {
    private final IExternalIndexer indexer;

    public IndexingDataFlowController(IHyracksTaskContext ctx, IRecordDataParser<T> dataParser,
            IRecordReader<? extends T> recordReader, IExternalIndexer indexer) throws IOException {
        super(ctx, dataParser, recordReader, 1 + indexer.getNumberOfFields());
        this.indexer = indexer;
    }

    @Override
    protected void appendOtherTupleFields(ArrayTupleBuilder tb) throws HyracksDataException {
        try {
            indexer.index(tb);
        } catch (IOException e) {
            throw HyracksDataException.create(e);
        }
    }
}