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.defaults;
  
  import org.apache.causeway.commons.collections.Can;
  import org.apache.causeway.core.metamodel.facetapi.Facet;
  import org.apache.causeway.core.metamodel.interactions.managed.ParameterNegotiationModel;
  import org.apache.causeway.core.metamodel.object.ManagedObject;
  import org.apache.causeway.core.metamodel.spec.feature.ObjectActionParameter;
  
  import org.jspecify.annotations.NonNull;
  
  /**
   * Obtain defaults for each of the parameters of the action.
   *
   * <p>
   * In the standard Apache Causeway Programming Model, corresponds to invoking the
   * <tt>defaultsNXxx(...)</tt> support method for an action (where N is the
   * 0-based parameter number).
   */
  public interface ActionParameterDefaultsFacet extends Facet {
  
      /**
       * default parameter value (scalar or non-scalar), depending on other pending parameters
       * @implNote this is low level, meant to be called only by
       * instances of {@link ObjectActionParameter}, other callers should
       * rather use {@link ObjectActionParameter#getDefault(ParameterNegotiationModel)}
       */
      Can<ManagedObject> getDefault(@NonNull ParameterNegotiationModel pendingArgs);
  }
  