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 java.util.Optional;
  
  import org.apache.causeway.commons.collections.Can;
  import org.apache.causeway.commons.internal.base._Casts;
  import org.apache.causeway.core.metamodel.progmodel.ProgrammingModel;
  import org.apache.causeway.core.metamodel.spec.ObjectSpecification;
  import org.apache.causeway.core.metamodel.spec.feature.MixedIn;
  import org.apache.causeway.core.metamodel.specloader.SpecificationLoader;
  import org.apache.causeway.core.metamodel.specloader.validator.MetaModelValidator;
  
  import lombok.experimental.UtilityClass;
  import lombok.extern.log4j.Log4j2;
  
  @UtilityClass
  @Log4j2
  class _ValidateUtil{
  
      void runValidators(
              final ProgrammingModel programmingModel,
              final SpecificationLoader specLoader) {
  
          log.debug("Running MetaModelValidators ...");
  
          var snapshot = specLoader.snapshotSpecifications();
  
          programmingModel.streamValidators()
          .filter(MetaModelValidator::isEnabled)
          .forEach(validator -> {
              log.debug("Running validator: {}", validator);
              try {
                  runValidator(validator, snapshot);
              } catch (Throwable t) {
                  log.error(t);
                  throw t;
              } finally {
                  log.debug("Done validator: {}", validator);
              }
          });
  
          log.debug("Done running MetaModelValidators.");
      }
  
      // -- HELPER
  
      private void runValidator(final MetaModelValidator validator, final Can<? extends ObjectSpecification> snapshot) {
  
          var actionValidator = _Casts.castTo(MetaModelValidator.ActionValidator.class, validator);
          var parameterValidator = _Casts.castTo(MetaModelValidator.ParameterValidator.class, validator);
          var propertyValidator = _Casts.castTo(MetaModelValidator.PropertyValidator.class, validator);
          var collectionValidator = _Casts.castTo(MetaModelValidator.CollectionValidator.class, validator);
  
          validator.validateEnter();
          snapshot
              .stream()
              .filter(validator.getFilter())
              .forEach(objSpec->runValidator(validator,
                      actionValidator, parameterValidator, propertyValidator, collectionValidator, objSpec));
          validator.validateExit();
      }
  
      private void runValidator(
              final MetaModelValidator objValidator,
              final Optional<MetaModelValidator.ActionValidator> actionValidator,
              final Optional<MetaModelValidator.ParameterValidator> parameterValidator,
              final Optional<MetaModelValidator.PropertyValidator> propertyValidator,
              final Optional<MetaModelValidator.CollectionValidator> collectionValidator,
              final ObjectSpecification objSpec) {
  
          objValidator.validateObjectEnter(objSpec);
  
          actionValidator
          .ifPresentOrElse(
                  validator->
                      objSpec.streamRuntimeActions(MixedIn.INCLUDED)
                      .forEach(act->{
                          parameterValidator.ifPresent(paramValidator->
                              act.streamParameters().forEach(param ->
                                  paramValidator.validateParameter(objSpec, act, param)));
                          validator.validateAction(objSpec, act);
                      }),
                  ()->
                      parameterValidator.ifPresent(paramValidator->
                          objSpec.streamRuntimeActions(MixedIn.INCLUDED)
                          .forEach(act->
                                  act.streamParameters().forEach(param ->
                                      paramValidator.validateParameter(objSpec, act, param))))
                  );
  
          propertyValidator
          .ifPresent(validator->{
              objSpec.streamProperties(MixedIn.INCLUDED)
              .forEach(prop->validator.validateProperty(objSpec, prop));
          });
  
          collectionValidator
          .ifPresent(validator->{
              objSpec.streamCollections(MixedIn.INCLUDED)
              .forEach(coll->validator.validateCollection(objSpec, coll));
          });
  
          objValidator.validateObjectExit(objSpec);
      }
  
  }
  