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 static org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.base.Preconditions.checkState;
  
  import java.util.List;
  import java.util.Map;
  import java.util.function.Function;
  import org.apache.beam.model.pipeline.v1.RunnerApi;
  import org.apache.beam.model.pipeline.v1.RunnerApi.StandardDisplayData;
  import org.apache.beam.sdk.transforms.display.DisplayData;
  import org.apache.beam.vendor.grpc.v1p69p0.com.google.protobuf.ByteString;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.ImmutableList;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.ImmutableMap;
  
  /** Utilities for going to/from DisplayData protos. */
  @SuppressWarnings({
    "nullness" // TODO(https://github.com/apache/beam/issues/20497)
  })
  public class DisplayDataTranslation {
    public static final String LABELLED = "beam:display_data:labelled:v1";
  
    static {
      checkState(LABELLED.equals(BeamUrns.getUrn(StandardDisplayData.DisplayData.LABELLED)));
    }
  
    private static final Map<String, Function<DisplayData.Item, ByteString>>
        WELL_KNOWN_URN_TRANSLATORS = ImmutableMap.of(LABELLED, DisplayDataTranslation::translate);
  
    public static List<RunnerApi.DisplayData> toProto(DisplayData displayData) {
      ImmutableList.Builder<RunnerApi.DisplayData> builder = ImmutableList.builder();
      for (DisplayData.Item item : displayData.items()) {
        Function<DisplayData.Item, ByteString> translator =
            WELL_KNOWN_URN_TRANSLATORS.get(item.getKey());
        String urn;
        if (translator != null) {
          urn = item.getKey();
        } else {
          urn = LABELLED;
          translator = DisplayDataTranslation::translate;
        }
        builder.add(
            RunnerApi.DisplayData.newBuilder()
                .setUrn(urn)
                .setPayload(translator.apply(item))
                .build());
      }
      return builder.build();
    }
  
    private static ByteString translate(DisplayData.Item item) {
      String label = item.getLabel() == null ? item.getKey() : item.getLabel();
      String namespace = item.getNamespace() == null ? "" : item.getNamespace().getName();
      RunnerApi.LabelledPayload.Builder builder =
          RunnerApi.LabelledPayload.newBuilder()
              .setKey(item.getKey())
              .setLabel(label)
              .setNamespace(namespace);
      Object valueObj = item.getValue() == null ? item.getShortValue() : item.getValue();
      if (valueObj instanceof Boolean) {
        builder.setBoolValue((Boolean) valueObj);
      } else if (valueObj instanceof Integer || valueObj instanceof Long) {
        builder.setIntValue((Long) valueObj);
      } else if (valueObj instanceof Number) {
        builder.setDoubleValue(((Number) valueObj).doubleValue());
      } else {
        builder.setStringValue(String.valueOf(valueObj));
      }
      return builder.build().toByteString();
    }
  }
  