content: /*
   * Copyright © 2018-2025 Commonwealth Scientific and Industrial Research
   * Organisation (CSIRO) ABN 41 687 119 230.
   *
   * Licensed 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 au.csiro.pathling.library;
  
  import ca.uhn.fhir.context.FhirVersionEnum;
  import jakarta.annotation.Nonnull;
  import java.io.Serial;
  import java.util.Iterator;
  import java.util.stream.StreamSupport;
  import org.apache.spark.api.java.function.MapPartitionsFunction;
  import org.hl7.fhir.instance.model.api.IBaseResource;
  
  /**
   * Encodes a partition of resources into strings, based upon a specified FHIR encoding type.
   *
   * @param <T> the type of resource to encode
   * @author John Grimes
   */
  class DecodeResourceMapPartitions<T extends IBaseResource> implements
      MapPartitionsFunction<T, String> {
  
    @Serial
    private static final long serialVersionUID = -13742787546282853L;
  
    @Nonnull
    protected final FhirVersionEnum fhirVersion;
  
    @Nonnull
    protected final String outputMimeType;
  
    public DecodeResourceMapPartitions(@Nonnull final FhirVersionEnum fhirVersion,
        @Nonnull final String outputMimeType) {
      this.fhirVersion = fhirVersion;
      this.outputMimeType = outputMimeType;
    }
  
    @Override
    public Iterator<String> call(final Iterator<T> iterator) {
      final ResourceParser parser = ResourceParser.build(fhirVersion, outputMimeType);
      final Iterable<T> iterable = () -> iterator;
      return StreamSupport.stream(iterable.spliterator(), false)
          .map(parser::encode)
          .iterator();
    }
  
  }
  