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.util;
  
  import org.apache.avro.Schema;
  import org.apache.beam.sdk.extensions.avro.coders.AvroCoder;
  import org.apache.beam.sdk.extensions.avro.io.AvroDatumFactory;
  import org.apache.beam.sdk.util.SerializableUtils;
  import org.apache.beam.sdk.util.StringUtils;
  import org.apache.beam.sdk.util.construction.SdkComponents;
  
  /** A {@link CloudObjectTranslator} for {@link AvroCoder}. */
  @SuppressWarnings({
    "rawtypes" // TODO(https://github.com/apache/beam/issues/20447)
  })
  class AvroCoderCloudObjectTranslator implements CloudObjectTranslator<AvroCoder> {
    private static final String DATUM_FACTORY_FIELD = "datum_factory";
    private static final String SCHEMA_FIELD = "schema";
    // deprecated fields
    private static final String TYPE_FIELD = "type";
    private static final String REFLECT_API_FIELD = "reflect_api";
  
    @Override
    public CloudObject toCloudObject(AvroCoder target, SdkComponents sdkComponents) {
      CloudObject base = CloudObject.forClass(AvroCoder.class);
      byte[] serializedDatumFactory =
          SerializableUtils.serializeToByteArray(target.getDatumFactory());
      Structs.addString(
          base, DATUM_FACTORY_FIELD, StringUtils.byteArrayToJsonString(serializedDatumFactory));
      Structs.addString(base, SCHEMA_FIELD, target.getSchema().toString());
      return base;
    }
  
    @Override
    public AvroCoder<?> fromCloudObject(CloudObject cloudObject) {
      String schemaString = Structs.getString(cloudObject, SCHEMA_FIELD);
      Schema.Parser parser = new Schema.Parser();
      Schema schema = parser.parse(schemaString);
      AvroDatumFactory<?> datumFactory;
      if (cloudObject.containsKey(TYPE_FIELD)) {
        // coder was created with an older beam version. use default datum factory
        try {
          String className = Structs.getString(cloudObject, TYPE_FIELD);
          Class<?> type = Class.forName(className);
          boolean useReflectApi = Structs.getBoolean(cloudObject, REFLECT_API_FIELD);
          datumFactory = AvroDatumFactory.of(type, useReflectApi);
        } catch (ClassNotFoundException e) {
          throw new IllegalArgumentException(e);
        }
      } else {
        byte[] deserializedDatumFactory =
            StringUtils.jsonStringToByteArray(Structs.getString(cloudObject, DATUM_FACTORY_FIELD));
        datumFactory =
            (AvroDatumFactory)
                SerializableUtils.deserializeFromByteArray(
                    deserializedDatumFactory, DATUM_FACTORY_FIELD);
      }
      return AvroCoder.of(datumFactory, schema);
    }
  
    @Override
    public Class<? extends AvroCoder> getSupportedClass() {
      return AvroCoder.class;
    }
  
    @Override
    public String cloudObjectClassName() {
      return CloudObject.forClass(AvroCoder.class).getClassName();
    }
  }
  