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.util.construction;
  
  import com.google.auto.service.AutoService;
  import java.util.Map;
  import org.apache.beam.model.pipeline.v1.RunnerApi;
  import org.apache.beam.model.pipeline.v1.RunnerApi.FunctionSpec;
  import org.apache.beam.model.pipeline.v1.RunnerApi.GroupIntoBatchesPayload;
  import org.apache.beam.sdk.runners.AppliedPTransform;
  import org.apache.beam.sdk.transforms.GroupIntoBatches;
  import org.apache.beam.sdk.transforms.PTransform;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.ImmutableMap;
  
  @SuppressWarnings({
    "nullness", // TODO(https://github.com/apache/beam/issues/20497)
    "rawtypes", // TODO(https://github.com/apache/beam/issues/20447)
  })
  public class GroupIntoBatchesTranslation {
    /**
     * A translator registered to translate {@link GroupIntoBatches} objects to protobuf
     * representation.
     */
    static class GroupIntoBatchesTranslator
        implements PTransformTranslation.TransformPayloadTranslator<GroupIntoBatches<?, ?>> {
      @Override
      public String getUrn() {
        return PTransformTranslation.GROUP_INTO_BATCHES_URN;
      }
  
      @Override
      public RunnerApi.FunctionSpec translate(
          AppliedPTransform<?, ?, GroupIntoBatches<?, ?>> transform, SdkComponents components) {
        return FunctionSpec.newBuilder()
            .setUrn(getUrn(transform.getTransform()))
            .setPayload(
                getPayloadFromParameters(transform.getTransform().getBatchingParams()).toByteString())
            .build();
      }
    }
  
    /**
     * A translator registered to translate {@link GroupIntoBatches.WithShardedKey} objects to
     * protobuf representation.
     */
    static class ShardedGroupIntoBatchesTranslator
        implements PTransformTranslation.TransformPayloadTranslator<
            GroupIntoBatches<?, ?>.WithShardedKey> {
      @Override
      public String getUrn() {
        return PTransformTranslation.GROUP_INTO_BATCHES_WITH_SHARDED_KEY_URN;
      }
  
      @Override
      public FunctionSpec translate(
          AppliedPTransform<?, ?, GroupIntoBatches<?, ?>.WithShardedKey> transform,
          SdkComponents components) {
        return FunctionSpec.newBuilder()
            .setUrn(getUrn(transform.getTransform()))
            .setPayload(
                getPayloadFromParameters(transform.getTransform().getBatchingParams()).toByteString())
            .build();
      }
    }
  
    private static GroupIntoBatchesPayload getPayloadFromParameters(
        GroupIntoBatches.BatchingParams params) {
      return RunnerApi.GroupIntoBatchesPayload.newBuilder()
          .setBatchSize(params.getBatchSize())
          .setBatchSizeBytes(params.getBatchSizeBytes())
          .setMaxBufferingDurationMillis(params.getMaxBufferingDuration().getMillis())
          .build();
    }
  
    /** Registers {@link GroupIntoBatchesTranslator} and {@link ShardedGroupIntoBatchesTranslator}. */
    @AutoService(TransformPayloadTranslatorRegistrar.class)
    public static class Registrar implements TransformPayloadTranslatorRegistrar {
      @Override
      public Map<
              ? extends Class<? extends PTransform>,
              ? extends PTransformTranslation.TransformPayloadTranslator>
          getTransformPayloadTranslators() {
        return ImmutableMap
            .<Class<? extends PTransform>, PTransformTranslation.TransformPayloadTranslator>builder()
            .put(GroupIntoBatches.class, new GroupIntoBatchesTranslator())
            .put(GroupIntoBatches.WithShardedKey.class, new ShardedGroupIntoBatchesTranslator())
            .build();
      }
    }
  }
  