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 limitations
   *  under the License.
   */
  package org.apache.causeway.core.metamodel.facets.object;
  
  import jakarta.inject.Inject;
  
  import org.apache.causeway.applib.Identifier;
  import org.apache.causeway.applib.annotation.DomainObject;
  import org.apache.causeway.applib.id.LogicalType;
  import org.apache.causeway.core.metamodel.context.MetaModelContext;
  import org.apache.causeway.core.metamodel.facetapi.FeatureType;
  import org.apache.causeway.core.metamodel.facets.FacetFactoryAbstract;
  import org.apache.causeway.core.metamodel.specloader.validator.ValidationFailure;
  
  public class ViewModelSemanticCheckingFacetFactory
  extends FacetFactoryAbstract {
  
      @Inject
      public ViewModelSemanticCheckingFacetFactory(final MetaModelContext mmc) {
          super(mmc, FeatureType.OBJECTS_ONLY);
      }
  
      @Override
      public void process(final ProcessClassContext processClassContext) {
  
          var cls = processClassContext.getCls();
  
          final boolean implementsViewModel = org.apache.causeway.applib.ViewModel.class.isAssignableFrom(cls);
          if(!implementsViewModel){
              return;
          }
  
          if(getConfiguration().getApplib().getAnnotation().getViewModel().getValidation().getSemanticChecking().isEnable()) {
              checkViewModelSemantics(processClassContext);
          }
      }
  
      // -- HELPER
  
      private void checkViewModelSemantics(final ProcessClassContext processClassContext) {
          var cls = processClassContext.getCls();
          var facetHolder = processClassContext.getFacetHolder();
  
          final DomainObject domainObject = processClassContext.synthesizeOnType(DomainObject.class).orElse(null);
          final boolean annotatedWithDomainObject = domainObject != null;
  
          if(annotatedWithDomainObject
                  && (domainObject.nature().isBean()
                          || domainObject.nature().isEntity())) {
              ValidationFailure.raise(
                      facetHolder.getSpecificationLoader(),
                      Identifier.classIdentifier(LogicalType.fqcn(cls)),
                      String.format(
                          "Inconsistent view model / domain object nature semantics; %1$s should not implement "
                          + "%2$s and be annotated with @%3$s specifying a nature that conflicts with view-model semantics",
                          cls.getName(),
                          org.apache.causeway.applib.ViewModel.class.getSimpleName(),
                          DomainObject.class.getSimpleName())
                      );
          }
      }
  
  }
  