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.navchild;
  
  import java.lang.invoke.MethodHandle;
  import java.lang.invoke.MethodHandles;
  import java.util.Optional;
  
  import org.apache.causeway.commons.functional.Try;
  import org.apache.causeway.commons.internal.reflection._GenericResolver.ResolvedMethod;
  import org.apache.causeway.core.metamodel.facetapi.Facet;
  import org.apache.causeway.core.metamodel.facetapi.FacetHolder;
  
  /**
   * Provides a MethodHandle and its associated Dewey order.
   *
   * @since 3.2
   */
  public sealed interface NavigableSubtreeSequenceFacet
  extends Facet
  permits NavigableSubtreeSequenceFacetRecord {
  
      String sequence();
      MethodHandle methodHandle();
  
      // -- FACTORY
  
      static Optional<NavigableSubtreeSequenceFacet> create(
          /**
           * Informal text, describing the origin of this facet.
           */
          final String origin,
          final Class<?> cls,
          final Optional<ResolvedMethod> resolvedMethod,
          final String sequence,
          final FacetHolder facetHolder) {
  
          return resolvedMethod
              .map(ResolvedMethod::method)
              .flatMap(method->Try.call(()->MethodHandles
                      .privateLookupIn(cls, MethodHandles.lookup())
                      .unreflect(method))
                  .ifFailure(e->e.printStackTrace())
                  .getValue()
                  .map(mh->new NavigableSubtreeSequenceFacetRecord(sequence, mh, origin, facetHolder)));
      }
  
  }
  