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;
  
  import java.util.function.BiConsumer;
  
  import org.apache.causeway.commons.collections.Can;
  import org.apache.causeway.commons.internal.base._Casts;
  import org.apache.causeway.commons.internal.reflection._GenericResolver.ResolvedMethod;
  import org.apache.causeway.commons.internal.reflection._MethodFacades.MethodFacade;
  import org.apache.causeway.core.metamodel.facets.ImperativeFacet.Intent;
  import org.apache.causeway.core.metamodel.object.ManagedObject;
  import org.apache.causeway.core.metamodel.object.ManagedObjects;
  import org.apache.causeway.core.metamodel.object.MmInvokeUtils;
  
  public record ImperativeAspect(
      Can<MethodFacade> methods,
      Intent intent) {
  
      // -- FACTORIES
  
      public static ImperativeAspect singleRegularMethod(final ResolvedMethod method, final Intent intent) {
          return new ImperativeAspect(ImperativeFacet.singleRegularMethod(method), intent);
      }
  
      // --
  
      public void visitAttributes(final BiConsumer<String, Object> visitor) {
          visitor.accept("methods", methods().join(", "));
          methods().forEach(method->
              visitor.accept(
                      "intent." + method.getName(), intent));
      }
  
      public Object invokeSingleMethod(final ManagedObject domainObject) {
          var method = methods.getFirstElseFail().asMethodElseFail(); // expected regular, as the factories only creates regular
          final Object returnValue = MmInvokeUtils.invokeNoArg(method.method(), domainObject);
          return returnValue;
      }
  
      public <T> T eval(
              final ManagedObject domainObject,
              final T fallback) {
          if(ManagedObjects.isNullOrUnspecifiedOrEmpty(domainObject)) return fallback;
  
          try {
              return _Casts.uncheckedCast(invokeSingleMethod(domainObject));
          } catch (final RuntimeException ex) {
              return fallback;
          }
      }
  
  }
  