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.web.admin;
  
  import java.util.Collection;
  import java.util.Map;
  import java.util.TreeMap;
  
  import javax.inject.Inject;
  import javax.inject.Singleton;
  
  import org.n52.iceland.cache.ContentCacheController;
  import org.n52.sos.cache.SosContentCache;
  import org.n52.sos.util.GeometryHandler;
  import org.springframework.stereotype.Component;
  
  /**
   * Class to get a summary of the cache objects.
   *
   * @since 4.0.0
   *
   */
  @Component
  @Singleton
  public final class CacheSummaryHandler {
  
      public static final String LAST_UPDATE_TIME = "last_update";
      public static final String MIN_PHENOMENON_TIME = "min_phenomenon_time";
      public static final String MAX_PHENOMENON_TIME = "max_phenomenon_time";
      public static final String MIN_RESULT_TIME = "min_result_time";
      public static final String MAX_RESULT_TIME = "max_result_time";
      public static final String GLOBAL_ENVELOPE = "global_envelope";
      public static final String NUM_OFFERINGS = "num_offerings";
      public static final String NUM_PROCEDURES = "num_procedures";
      public static final String NUM_OBSERVABLE_PROPERTIES = "num_observable_properties";
      public static final String NUM_FEATURES_OF_INTEREST = "num_features_of_interest";
      public static final String NUM_FEATURE_OF_INTEREST_TYPES = "num_feature_of_interest_types";
      public static final String NUM_OBSERVATION_TYPES = "num_observation_types";
      public static final String NUM_RELATED_FEATURES = "num_related_features";
      public static final String NUM_RESULT_TEMPLATES = "num_result_templates";
      public static final String DEFAULT_EPSG = "default_epsg";
      public static final String NUM_EPSGS = "num_epsgs";
  
      @Inject
      private GeometryHandler geometryHandler;
  
  
      private CacheSummaryHandler() {
  
      }
  
      public Map<String, String> getCacheValues(ContentCacheController cacheController) {
          SosContentCache cache = (SosContentCache) cacheController.getCache();
          Map<String, String> values = new TreeMap<>();
          values.put(LAST_UPDATE_TIME, nullSafeToString(cache.getLastUpdateTime()));
          values.put(MIN_PHENOMENON_TIME, nullSafeToString(cache.getMinPhenomenonTime()));
          values.put(MAX_PHENOMENON_TIME, nullSafeToString(cache.getMaxPhenomenonTime()));
          values.put(MIN_RESULT_TIME, nullSafeToString(cache.getMinResultTime()));
          values.put(MAX_RESULT_TIME, nullSafeToString(cache.getMaxResultTime()));
          values.put(GLOBAL_ENVELOPE, nullSafeToString(cache.getGlobalEnvelope()));
          values.put(NUM_OFFERINGS, nullSafeToString(cache.getOfferings()));
          values.put(NUM_PROCEDURES, nullSafeToString(cache.getProcedures()));
          values.put(NUM_OBSERVABLE_PROPERTIES, nullSafeToString(cache.getObservableProperties()));
          values.put(NUM_FEATURES_OF_INTEREST, nullSafeToString(cache.getFeaturesOfInterest()));
          values.put(NUM_FEATURE_OF_INTEREST_TYPES, nullSafeToString(cache.getFeatureOfInterestTypes()));
          values.put(NUM_OBSERVATION_TYPES, nullSafeToString(cache.getObservationTypes()));
          values.put(NUM_RELATED_FEATURES, nullSafeToString(cache.getRelatedFeatures()));
          values.put(NUM_RESULT_TEMPLATES, nullSafeToString(cache.getResultTemplates()));
          values.put(DEFAULT_EPSG, Integer.toString(cache.getDefaultEPSGCode()));
          values.put(NUM_EPSGS, nullSafeToString(geometryHandler.getSupportedCRS()));
          return values;
      }
  
      private String nullSafeToString(Object obj) {
          if (obj == null) {
              return "null";
          } else if (obj instanceof Collection) {
              return Integer.toString(((Collection<?>) obj).size());
          } else {
              return obj.toString();
          }
      }
  }
  