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
   * limitations under the License.
   */
  package org.apache.beam.sdk.extensions.avro.io;
  
  import java.util.Map;
  import org.apache.avro.Schema;
  import org.apache.avro.file.CodecFactory;
  import org.apache.beam.sdk.io.FileBasedSink.DynamicDestinations;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.ImmutableMap;
  import org.checkerframework.checker.nullness.qual.Nullable;
  
  /**
   * A specialization of {@link DynamicDestinations} for {@link AvroIO}. In addition to dynamic file
   * destinations, this allows specifying other AVRO properties (schema, metadata, codec, datum
   * writer) per destination.
   */
  public abstract class DynamicAvroDestinations<UserT, DestinationT, OutputT>
      extends DynamicDestinations<UserT, DestinationT, OutputT> {
    /** Return an AVRO schema for a given destination. */
    public abstract Schema getSchema(DestinationT destination);
  
    /** Return AVRO file metadata for a given destination. */
    public Map<String, Object> getMetadata(DestinationT destination) {
      return ImmutableMap.of();
    }
  
    /** Return an AVRO codec for a given destination. */
    public CodecFactory getCodec(DestinationT destination) {
      return AvroIO.TypedWrite.DEFAULT_CODEC;
    }
  
    /**
     * Return a {@link AvroSink.DatumWriterFactory} for a given destination. If provided, it will be
     * used to created {@link org.apache.avro.io.DatumWriter} instances as required.
     */
    public AvroSink.@Nullable DatumWriterFactory<OutputT> getDatumWriterFactory(
        DestinationT destinationT) {
      return null;
    }
  }
  