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   *  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.causeway.core.metamodel.postprocessors.all.i18n;
  
  import jakarta.inject.Inject;
  
  import org.springframework.util.StringUtils;
  
  import org.apache.causeway.commons.collections.Can;
  import org.apache.causeway.core.metamodel.context.MetaModelContext;
  import org.apache.causeway.core.metamodel.facetapi.FacetUtil;
  import org.apache.causeway.core.metamodel.facets.all.i8n.noun.Noun;
  import org.apache.causeway.core.metamodel.facets.all.named.ObjectNamedFacet;
  import org.apache.causeway.core.metamodel.facets.all.named.ObjectNamedFacetSynthesized;
  import org.apache.causeway.core.metamodel.postprocessors.MetaModelPostProcessorAbstract;
  import org.apache.causeway.core.metamodel.spec.ObjectSpecification;
  
  public class SynthesizeObjectNamingPostProcessor
  extends MetaModelPostProcessorAbstract {
  
      @Inject
      public SynthesizeObjectNamingPostProcessor(final MetaModelContext metaModelContext) {
          super(metaModelContext);
      }
  
      @Override
      public void postProcessObject(final ObjectSpecification objectSpecification) {
  
          final boolean canProcess = objectSpecification.isEntityOrViewModelOrAbstract()
                  || objectSpecification.isInjectable();
          if(!canProcess) return;
  
          var topRank = objectSpecification
                  .getFacetRanking(ObjectNamedFacet.class) // don't use lookupFacet, as that would search up the
                                                           // inheritance hierarchy (which we don't want here)
                  .map(facetRanking->facetRanking.getTopRank(ObjectNamedFacet.class))
                  .orElse(Can.empty())
                  .reverse(); // historically last have higher precedence, so when reverted we can use findFirst logic
  
          var singular = topRank
                  .stream()
                  .filter(objectNamedFacet->objectNamedFacet.isNounPresent())
                  .findFirst()
                  .map(ObjectNamedFacet::singular)
                  .filter(StringUtils::hasText)
                  .orElseGet(()->getSingularFallbackNoun(objectSpecification));
  
          FacetUtil.addFacet(
                  new ObjectNamedFacetSynthesized(new Noun(singular), objectSpecification));
      }
  
      // -- HELEPR
  
      private String getSingularFallbackNoun(final ObjectSpecification spec) {
          return spec.getFeatureIdentifier().getClassNaturalName();
      }
  
  }
  