asterixdb/asterix-external-data/src/main/java/org/apache/asterix/external/input/record/reader/gcs/GCSReaderFactory.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.input.record.reader.gcs;

import java.util.Collections;
import java.util.List;
import java.util.Map;

import org.apache.asterix.external.input.record.reader.stream.StreamRecordReaderFactory;
import org.apache.asterix.external.provider.StreamRecordReaderProvider;
import org.apache.asterix.external.util.ExternalDataConstants;
import org.apache.hyracks.algebricks.common.constraints.AlgebricksAbsolutePartitionConstraint;
import org.apache.hyracks.algebricks.common.exceptions.AlgebricksException;
import org.apache.hyracks.api.application.IServiceContext;
import org.apache.hyracks.api.exceptions.HyracksDataException;
import org.apache.hyracks.api.exceptions.IWarningCollector;

public class GCSReaderFactory extends StreamRecordReaderFactory {

    private static final long serialVersionUID = 1L;

    private static final List<String> recordReaderNames =
            Collections.singletonList(ExternalDataConstants.KEY_ADAPTER_NAME_GCS);

    @Override
    public List<String> getRecordReaderNames() {
        return recordReaderNames;
    }

    @Override
    public DataSourceType getDataSourceType() {
        return DataSourceType.RECORDS;
    }

    @Override
    public Class<?> getRecordClass() {
        return char[].class;
    }

    @Override
    public AlgebricksAbsolutePartitionConstraint getPartitionConstraint() throws AlgebricksException {
        return streamFactory.getPartitionConstraint();
    }

    @Override
    public void configure(IServiceContext ctx, Map<String, String> configuration, IWarningCollector warningCollector)
            throws AlgebricksException, HyracksDataException {
        this.configuration = configuration;

        // Stream factory
        streamFactory = new GCSInputStreamFactory();
        streamFactory.configure(ctx, configuration, warningCollector);

        // record reader
        recordReaderClazz = StreamRecordReaderProvider.getRecordReaderClazz(configuration);
    }
}