content: /*
   * Copyright (C) 2012-2023 52°North Spatial Information Research GmbH
   *
   * This program is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 as published
   * by the Free Software Foundation.
   *
   * If the program is linked with libraries which are licensed under one of
   * the following licenses, the combination of the program with the linked
   * library is not considered a "derivative work" of the program:
   *
   *     - Apache License, version 2.0
   *     - Apache Software License, version 1.0
   *     - GNU Lesser General Public License, version 3
   *     - Mozilla Public License, versions 1.0, 1.1 and 2.0
   *     - Common Development and Distribution License (CDDL), version 1.0
   *
   * Therefore the distribution of the program linked with libraries licensed
   * under the aforementioned licenses, is permitted by the copyright holders
   * if the distribution is compliant with both the GNU General Public
   * License version 2 and the aforementioned licenses.
   *
   * This program is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
   * Public License for more details.
   */
  package org.n52.sos.ds;
  
  import java.util.Collection;
  import java.util.List;
  import java.util.Map;
  import java.util.stream.Collectors;
  
  import org.hibernate.Session;
  import org.n52.io.request.IoParameters;
  import org.n52.sensorweb.server.db.old.dao.DbQuery;
  import org.n52.series.db.beans.DatasetEntity;
  import org.n52.series.db.old.dao.DatasetDao;
  import org.n52.shetland.ogc.ows.exception.OwsExceptionReport;
  import org.n52.shetland.ogc.sos.SosResultEncoding;
  import org.n52.shetland.ogc.sos.SosResultStructure;
  import org.n52.shetland.ogc.swe.SweDataRecord;
  import org.n52.sos.ds.utils.HibernateUnproxy;
  import org.n52.sos.ds.utils.ResultHandlingHelper;
  import org.n52.sos.exception.sos.concrete.NoSweCommonEncodingForOfferingObservablePropertyCombination;
  import org.n52.svalbard.util.SweHelper;
  
  import com.google.common.collect.Maps;
  
  public interface AbstractResultHandler extends HibernateUnproxy, ApiQueryHelper {
  
      SweHelper getSweHelper();
  
      ResultHandlingHelper getResultHandlingHelper();
  
      default SosResultEncoding createSosResultEncoding() {
          return new SosResultEncoding(getSweHelper().createDefaultTextEncoding());
      }
  
      default SosResultStructure generateSosResultStructure(String observedProperty, String offering,
              Collection<String> featureIdentifier, Session session) throws OwsExceptionReport {
  
          List<DatasetEntity> datasets = new DatasetDao<>(session)
                  .getAllInstances(createDbQuery(observedProperty, offering, featureIdentifier));
          if (datasets != null && !datasets.isEmpty()) {
              boolean procedure = checkForProcedures(datasets);
              boolean feature = checkForFeatures(datasets);
              DatasetEntity dataset = datasets.get(0);
              if (dataset.getFirstObservation() != null) {
                  SweDataRecord createRecord = getResultHandlingHelper().createDataRecordForResultTemplate(
                          unproxy(dataset.getFirstObservation(), session), procedure, feature);
                  return new SosResultStructure(createRecord);
              }
          }
          throw new NoSweCommonEncodingForOfferingObservablePropertyCombination(offering, observedProperty);
      }
  
      default boolean checkForProcedures(List<DatasetEntity> series) {
          return series.stream()
                  .map(d -> d.getProcedure()
                          .getId())
                  .collect(Collectors.toSet())
                  .size() > 1;
      }
  
      default boolean checkForFeatures(List<DatasetEntity> series) {
          return series.stream()
                  .map(d -> d.getFeature()
                          .getId())
                  .collect(Collectors.toSet())
                  .size() > 1;
      }
  
      default DbQuery createDbQuery(String observedProperty, String offering, Collection<String> featureIdentifier) {
          Map<String, String> map = Maps.newHashMap();
          if (featureIdentifier != null && !featureIdentifier.isEmpty()) {
              map.put(IoParameters.FEATURES, listToString(featureIdentifier));
          }
          if (observedProperty != null && !observedProperty.isEmpty()) {
              map.put(IoParameters.PHENOMENA, listToString(observedProperty));
          }
          if (offering != null && !offering.isEmpty()) {
              map.put(IoParameters.OFFERINGS, listToString(offering));
          }
          map.put(IoParameters.MATCH_DOMAIN_IDS, Boolean.toString(true));
          return createDbQuery(IoParameters.createFromSingleValueMap(map));
      }
  }
  