org.apache.hudi.io.storage.HoodieAvroFileReaderBase Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* 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,
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* See the License for the specific language governing permissions and
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*/
package org.apache.hudi.io.storage;
import org.apache.avro.Schema;
import org.apache.avro.generic.IndexedRecord;
import org.apache.hudi.common.model.HoodieAvroIndexedRecord;
import org.apache.hudi.common.model.HoodieRecord;
import org.apache.hudi.common.util.ClosableIterator;
import org.apache.hudi.common.util.MappingIterator;
import java.io.IOException;
import static org.apache.hudi.common.util.TypeUtils.unsafeCast;
/**
* Base class for every {@link HoodieAvroFileReader}
*/
abstract class HoodieAvroFileReaderBase implements HoodieAvroFileReader {
@Override
public ClosableIterator> getRecordIterator(Schema readerSchema, Schema requestedSchema) throws IOException {
ClosableIterator iterator = getIndexedRecordIterator(readerSchema, requestedSchema);
return new MappingIterator<>(iterator, data -> unsafeCast(new HoodieAvroIndexedRecord(data)));
}
protected ClosableIterator getIndexedRecordIterator(Schema readerSchema) throws IOException {
return getIndexedRecordIterator(readerSchema, readerSchema);
}
protected abstract ClosableIterator getIndexedRecordIterator(Schema readerSchema, Schema requestedSchema) throws IOException;
}