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.spec.impl;
  
  import org.apache.causeway.core.metamodel.facets.actions.contributing.ContributingFacet;
  import org.apache.causeway.core.metamodel.facets.all.hide.HiddenFacet;
  import org.apache.causeway.core.metamodel.spec.feature.ObjectAction;
  
  import org.jspecify.annotations.NonNull;
  
  /** package private utility */
  final class _SpecPredicates {
  
      // -- LOWER LEVEL
  
      static boolean isGetterCandidate(final @NonNull ObjectAction action) {
          if(action.getParameterCount() != 0) {
              return false;
          }
          if(!action.hasReturn()) {
              return false;
          }
          return true;
      }
  
      // -- HIGHER LEVEL - MIXINS
  
      static boolean isMixedInAction(final @NonNull ObjectAction mixinAction) {
          if(HiddenFacet.isAlwaysHidden(mixinAction)) {
              return false;
          }
          if(ContributingFacet.isActionContributionVetoed(mixinAction)) {
              return false;
          }
          return true;
      }
  
      static boolean isMixedInAssociation(final @NonNull ObjectAction mixinAction) {
          if(!isGetterCandidate(mixinAction)) {
              return false;
          }
          if(!mixinAction.getSemantics().isSafeInNature()) {
              return false;
          }
          if(HiddenFacet.isAlwaysHidden(mixinAction)) {
              return false;
          }
          if(ContributingFacet.isAssociationContributionVetoed(mixinAction)) {
              return false;
          }
          /* [CAUSEWAY-3531] if neither contribution AS_ACTION nor contribution AS_ASSOCIATION are vetoed,
           * then let the contribution AS_ACTION win */
          if(!ContributingFacet.isActionContributionVetoed(mixinAction)) {
              return false;
          }
          return true;
      }
  
  }
  