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.interactions.managed;
  
  import java.util.Optional;
  
  import org.jspecify.annotations.NonNull;
  
  import org.apache.causeway.commons.collections.Can;
  import org.apache.causeway.core.metamodel.object.ManagedObject;
  import org.apache.causeway.core.metamodel.spec.feature.ObjectActionParameter;
  
  public sealed interface ManagedParameter
  extends
      ManagedValue,
      ManagedFeature
  permits ParameterNegotiationModel.ParameterModel {
  
      ObjectActionParameter metaModel();
      @Override default ObjectActionParameter getMetaModel() { return metaModel(); }
  
      int paramIndex();
      ParameterNegotiationModel negotiationModel();
  
      /**
       * @return non-empty if not usable/editable (meaning if read-only)
       */
      Optional<InteractionVeto> checkUsability(@NonNull Can<ManagedObject> params);
  
  }
  