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.param.parameter.mandatory;
  
  import java.util.Optional;
  
  import org.jspecify.annotations.Nullable;
  
  import org.apache.causeway.core.metamodel.facetapi.FacetHolder;
  import org.apache.causeway.core.metamodel.facets.FacetedMethodParameter;
  import org.apache.causeway.core.metamodel.facets.objectvalue.mandatory.MandatoryFacet;
  import org.apache.causeway.core.metamodel.facets.objectvalue.mandatory.MandatoryFacetAbstract;
  
  /**
   * Derived by presence of an {@link Nullable} annotation on parameter.
   *
   * <p>
   * This implementation indicates that the {@link FacetHolder} is <i>not</i>
   * mandatory, as per {@link #getSemantics()}.
   */
  public class MandatoryFacetInvertedByNullableAnnotationOnParameter
  extends MandatoryFacetAbstract {
  
      public static Optional<MandatoryFacet> create(
              final boolean hasNullable,
              final Class<?> parameterType,
              final FacetedMethodParameter holder) {
  
          if(!hasNullable) {
              return Optional.empty();
          }
          if(parameterType.isPrimitive()) {
              return Optional.empty();
          }
          return Optional.of(new MandatoryFacetInvertedByNullableAnnotationOnParameter(holder));
      }
  
      private MandatoryFacetInvertedByNullableAnnotationOnParameter(final FacetHolder holder) {
          super(Semantics.OPTIONAL, holder);
      }
  
  }
  