content: /*
   * 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
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  package org.apache.beam.runners.dataflow.worker;
  
  import static com.google.api.client.util.Preconditions.checkArgument;
  import static org.apache.beam.runners.dataflow.util.Structs.getLong;
  import static org.apache.beam.runners.dataflow.util.Structs.getString;
  
  import com.google.auto.service.AutoService;
  import java.util.Map;
  import org.apache.beam.runners.dataflow.util.CloudObject;
  import org.apache.beam.runners.dataflow.worker.util.WorkerPropertyNames;
  import org.apache.beam.runners.dataflow.worker.util.common.worker.NativeReader;
  import org.apache.beam.sdk.coders.Coder;
  import org.apache.beam.sdk.options.PipelineOptions;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.ImmutableMap;
  import org.checkerframework.checker.nullness.qual.Nullable;
  
  /** Creates an {@link AvroByteReader} from a CloudObject spec. */
  @SuppressWarnings({
    "rawtypes", // TODO(https://github.com/apache/beam/issues/20447)
    "nullness" // TODO(https://github.com/apache/beam/issues/20497)
  })
  public class AvroByteReaderFactory implements ReaderFactory {
  
    /** A {@link ReaderFactory.Registrar} for Avro byte sources. */
    @AutoService(ReaderFactory.Registrar.class)
    public static class Registrar implements ReaderFactory.Registrar {
  
      @Override
      public Map<String, ReaderFactory> factories() {
        return ImmutableMap.of("AvroSource", new AvroByteReaderFactory());
      }
    }
  
    public AvroByteReaderFactory() {}
  
    @Override
    public NativeReader<?> create(
        CloudObject spec,
        @Nullable Coder<?> coder,
        @Nullable PipelineOptions options,
        @Nullable DataflowExecutionContext executionContext,
        DataflowOperationContext operationContext)
        throws Exception {
      checkArgument(coder != null, "coder must not be null");
      checkArgument(options != null, "options must not be null");
      return create(spec, coder, options);
    }
  
    NativeReader<?> create(CloudObject spec, Coder<?> coder, PipelineOptions options)
        throws Exception {
      String filename = getString(spec, WorkerPropertyNames.FILENAME);
      long startOffset = getLong(spec, WorkerPropertyNames.START_OFFSET, 0L);
      long endOffset = getLong(spec, WorkerPropertyNames.END_OFFSET, Long.MAX_VALUE);
      return new AvroByteReader<>(filename, startOffset, endOffset, coder, options);
    }
  }
  