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.viewer.wicket.model.models.coll;
  
  import java.util.Optional;
  
  import org.apache.wicket.model.IModel;
  
  import org.apache.causeway.core.metamodel.tabular.DataRow;
  import org.apache.causeway.core.metamodel.tabular.DataTableInteractive;
  
  public record DataRowWkt(
      int rowIndex,
      CollectionModel collectionModel)
  implements IModel<DataRow> {
  
      @Override
      public DataRow getObject() {
          return dataRow().orElse(null);
      }
  
      public Optional<DataRow> dataRow() {
          return dataTable().lookupDataRow(rowIndex);
      }
  
      /**
       * Whether it is safe (free of side-effects) to load/access given model's object.
       * <p>
       * As of [CAUSEWAY-3658], don't call
       * {@link org.apache.causeway.viewer.wicket.model.models.coll.DataRowWkt#getObject()},
       * when the model's object is not transiently already loaded, because otherwise it would
       * enforce a page-reload as side-effect.
       */
      public boolean isTableDataLoaded() {
          return collectionModel().isTableDataLoaded();
      }
  
      // -- HELPER
  
      private DataTableInteractive dataTable() {
          return collectionModel().getObject();
      }
  
  }
  