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.runners.dataflow.util;
  
  import java.io.IOException;
  import org.apache.beam.model.pipeline.v1.SchemaApi;
  import org.apache.beam.sdk.schemas.Schema;
  import org.apache.beam.sdk.schemas.SchemaCoder;
  import org.apache.beam.sdk.schemas.SchemaTranslation;
  import org.apache.beam.sdk.transforms.SerializableFunction;
  import org.apache.beam.sdk.util.SerializableUtils;
  import org.apache.beam.sdk.util.StringUtils;
  import org.apache.beam.sdk.util.construction.SdkComponents;
  import org.apache.beam.sdk.values.TypeDescriptor;
  import org.apache.beam.vendor.grpc.v1p69p0.com.google.protobuf.util.JsonFormat;
  
  /** Translator for Schema coders. */
  @SuppressWarnings({
    "rawtypes" // TODO(https://github.com/apache/beam/issues/20447)
  })
  public class SchemaCoderCloudObjectTranslator implements CloudObjectTranslator<SchemaCoder> {
    private static final String SCHEMA = "schema";
    private static final String TYPE_DESCRIPTOR = "typeDescriptor";
    private static final String TO_ROW_FUNCTION = "toRowFunction";
    private static final String FROM_ROW_FUNCTION = "fromRowFunction";
  
    /** Convert to a cloud object. */
    @Override
    public CloudObject toCloudObject(SchemaCoder target, SdkComponents sdkComponents) {
      CloudObject base = CloudObject.forClass(SchemaCoder.class);
  
      Structs.addString(
          base,
          TYPE_DESCRIPTOR,
          StringUtils.byteArrayToJsonString(
              SerializableUtils.serializeToByteArray(target.getEncodedTypeDescriptor())));
      Structs.addString(
          base,
          TO_ROW_FUNCTION,
          StringUtils.byteArrayToJsonString(
              SerializableUtils.serializeToByteArray(target.getToRowFunction())));
      Structs.addString(
          base,
          FROM_ROW_FUNCTION,
          StringUtils.byteArrayToJsonString(
              SerializableUtils.serializeToByteArray(target.getFromRowFunction())));
  
      try {
        Structs.addString(
            base,
            SCHEMA,
            JsonFormat.printer()
                .omittingInsignificantWhitespace()
                .print(SchemaTranslation.schemaToProto(target.getSchema(), true)));
      } catch (Exception e) {
        throw new RuntimeException(e);
      }
      return base;
    }
  
    /** Convert from a cloud object. */
    @Override
    public SchemaCoder fromCloudObject(CloudObject cloudObject) {
      try {
        TypeDescriptor typeDescriptor =
            (TypeDescriptor)
                SerializableUtils.deserializeFromByteArray(
                    StringUtils.jsonStringToByteArray(
                        Structs.getString(cloudObject, TYPE_DESCRIPTOR)),
                    "typeDescriptor");
        SerializableFunction toRowFunction =
            (SerializableFunction)
                SerializableUtils.deserializeFromByteArray(
                    StringUtils.jsonStringToByteArray(
                        Structs.getString(cloudObject, TO_ROW_FUNCTION)),
                    "toRowFunction");
        SerializableFunction fromRowFunction =
            (SerializableFunction)
                SerializableUtils.deserializeFromByteArray(
                    StringUtils.jsonStringToByteArray(
                        Structs.getString(cloudObject, FROM_ROW_FUNCTION)),
                    "fromRowFunction");
        SchemaApi.Schema.Builder schemaBuilder = SchemaApi.Schema.newBuilder();
        JsonFormat.parser().merge(Structs.getString(cloudObject, SCHEMA), schemaBuilder);
        Schema schema = SchemaTranslation.schemaFromProto(schemaBuilder.build());
        return SchemaCoder.of(schema, typeDescriptor, toRowFunction, fromRowFunction);
      } catch (IOException e) {
        throw new RuntimeException(e);
      }
    }
  
    @Override
    public Class<? extends SchemaCoder> getSupportedClass() {
      return SchemaCoder.class;
    }
  
    @Override
    public String cloudObjectClassName() {
      return CloudObject.forClass(SchemaCoder.class).getClassName();
    }
  }
  