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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.facets.param.support;
  
  import java.util.function.UnaryOperator;
  
  import org.apache.causeway.commons.collections.Can;
  import org.apache.causeway.core.config.progmodel.ProgrammingModelConstants.MemberSupportPrefix;
  import org.apache.causeway.core.metamodel.context.MetaModelContext;
  import org.apache.causeway.core.metamodel.facetapi.FeatureType;
  import org.apache.causeway.core.metamodel.facets.FacetedMethodParameter;
  import org.apache.causeway.core.metamodel.facets.ParameterSupport;
  import org.apache.causeway.core.metamodel.facets.ParameterSupport.ParamSupportingMethodSearchRequest;
  import org.apache.causeway.core.metamodel.facets.ParameterSupport.ParamSupportingMethodSearchRequest.ParamSupportingMethodSearchRequestBuilder;
  import org.apache.causeway.core.metamodel.facets.ParameterSupport.ParamSupportingMethodSearchResult;
  import org.apache.causeway.core.metamodel.facets.ParameterSupport.SearchAlgorithm;
  import org.apache.causeway.core.metamodel.facets.members.support.MemberAndPropertySupportFacetFactoryAbstract;
  
  import org.jspecify.annotations.NonNull;
  
  public abstract class ActionParameterSupportFacetFactoryAbstract
  extends MemberAndPropertySupportFacetFactoryAbstract {
  
      private final UnaryOperator<ParamSupportingMethodSearchRequest.ParamSupportingMethodSearchRequestBuilder>
          searchRefiner;
  
      protected ActionParameterSupportFacetFactoryAbstract(
              final @NonNull MetaModelContext mmc,
              final @NonNull MemberSupportPrefix memberSupportPrefix) {
          this(mmc, memberSupportPrefix, UnaryOperator.identity());
      }
  
      protected ActionParameterSupportFacetFactoryAbstract(
              final @NonNull MetaModelContext mmc,
              final @NonNull MemberSupportPrefix memberSupportPrefix,
              final @NonNull UnaryOperator<ParamSupportingMethodSearchRequestBuilder> searchRefiner) {
          super(mmc, FeatureType.ACTIONS_ONLY, memberSupportPrefix);
          this.searchRefiner = searchRefiner;
      }
  
      @Override
      public final void process(final ProcessMethodContext processMethodContext) {
          var facetedMethod = processMethodContext.getFacetHolder();
          var parameters = facetedMethod.parameters();
  
          if (parameters.isEmpty()) return;
  
          var methodNameCandidates = memberSupportPrefix.getMethodNamePrefixes()
                  .flatMap(processMethodContext::parameterSupportCandidates);
  
          var searchRequest = searchRefiner
                  .apply(
                      ParameterSupport.ParamSupportingMethodSearchRequest.builder()
                          .processMethodContext(processMethodContext)
                          .paramIndexToMethodNameProviders(methodNameCandidates)
                          // default, can be overwritten
                          .searchAlgorithms(Can.of(SearchAlgorithm.PAT, SearchAlgorithm.SWEEP))
                          .returnTypePattern(memberSupportPrefix.getSupportMethodReturnType()))
                  .build();
  
          ParameterSupport.findParamSupportingMethods(searchRequest, searchResult -> {
              processMethodContext.removeMethod(searchResult.supportingMethod());
              var paramIndex = searchResult.paramIndex();
              // add facets directly to parameters, not to actions
              var paramAsHolder = parameters.getElseFail(paramIndex);
              onSearchResult(paramAsHolder, searchResult);
          });
      }
  
      protected abstract void onSearchResult(
              FacetedMethodParameter paramAsHolder,
              ParamSupportingMethodSearchResult searchResult);
  
  }
  