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.callbacks;
  
  import java.util.function.BiFunction;
  import java.util.stream.Stream;
  
  import jakarta.inject.Inject;
  
  import org.apache.causeway.commons.collections.Can;
  import org.apache.causeway.commons.internal.reflection._MethodFacades;
  import org.apache.causeway.commons.internal.reflection._MethodFacades.MethodFacade;
  import org.apache.causeway.core.config.progmodel.ProgrammingModelConstants.CallbackMethod;
  import org.apache.causeway.core.metamodel.context.MetaModelContext;
  import org.apache.causeway.core.metamodel.facetapi.FacetHolder;
  import org.apache.causeway.core.metamodel.facetapi.FeatureType;
  import org.apache.causeway.core.metamodel.methods.MethodFinder;
  import org.apache.causeway.core.metamodel.methods.MethodPrefixBasedFacetFactoryAbstract;
  
  public class CallbackFacetFactory
  extends MethodPrefixBasedFacetFactoryAbstract {
  
      @Inject
      public CallbackFacetFactory(final MetaModelContext mmc) {
          super(mmc, FeatureType.OBJECTS_ONLY, OrphanValidation.VALIDATE,
                  Stream.of(CallbackMethod.values())
                  .map(CallbackMethod::getMethodNames)
                  .flatMap(Can::stream)
                  .collect(Can.toCan()));
      }
  
      @Override
      public final void process(final ProcessClassContext processClassContext) {
          processCallback(processClassContext, CallbackMethod.CREATED, CreatedCallbackFacetViaMethod::new);
          processCallback(processClassContext, CallbackMethod.LOADED, LoadedCallbackFacetViaMethod::new);
          processCallback(processClassContext, CallbackMethod.PERSISTED, PersistedCallbackFacetViaMethod::new);
          processCallback(processClassContext, CallbackMethod.PERSISTING, PersistingCallbackFacetViaMethod::new);
          processCallback(processClassContext, CallbackMethod.REMOVING, RemovingCallbackFacetViaMethod::new);
          processCallback(processClassContext, CallbackMethod.UPDATED, UpdatedCallbackFacetViaMethod::new);
          processCallback(processClassContext, CallbackMethod.UPDATING, UpdatingCallbackFacetViaMethod::new);
      }
  
      private void processCallback(
              final ProcessClassContext processClassContext,
              final CallbackMethod callbackMethodEnum,
              final BiFunction<Can<MethodFacade>, FacetHolder, CallbackFacet> callbackFacetConstructor) {
          var cls = processClassContext.getCls();
          var facetHolder = processClassContext.getFacetHolder();
  
          var callbackMethods =
              MethodFinder
              .livecycleCallback(
                      cls,
                      callbackMethodEnum.getMethodNames(),
                      processClassContext.getIntrospectionPolicy())
              .withRequiredReturnType(void.class)
              .streamMethodsMatchingSignature(NO_ARG)
              .peek(processClassContext::removeMethod)
              .map(_MethodFacades::regular)
              .collect(Can.toCan());
  
          if(callbackMethods.isNotEmpty()) {
              addFacet(callbackFacetConstructor.apply(callbackMethods, facetHolder));
          }
  
      }
  
  }
  