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.cassandra.db.transform;
  
  import org.apache.cassandra.db.RegularAndStaticColumns;
  import org.apache.cassandra.db.rows.BaseRowIterator;
  import org.apache.cassandra.db.rows.RowIterator;
  import org.apache.cassandra.db.rows.UnfilteredRowIterator;
  
  import static org.apache.cassandra.db.transform.Transformation.add;
  import static org.apache.cassandra.db.transform.Transformation.mutable;
  
  /**
   * An interface for providing new row contents for a partition.
   *
   * The new contents are produced as a normal arbitrary RowIterator or UnfilteredRowIterator (as appropriate),
   * with matching staticRow, partitionKey and partitionLevelDeletion.
   *
   * The transforming iterator invokes this method when any current source is exhausted, then then inserts the
   * new contents as the new source.
   *
   * If the new source is itself a product of any transformations, the two transforming iterators are merged
   * so that control flow always occurs at the outermost point
   */
  public interface MoreRows<I extends BaseRowIterator<?>> extends MoreContents<I>
  {
  
      public static UnfilteredRowIterator extend(UnfilteredRowIterator iterator, MoreRows<? super UnfilteredRowIterator> more)
      {
          return add(mutable(iterator), more);
      }
  
      public static UnfilteredRowIterator extend(UnfilteredRowIterator iterator, MoreRows<? super UnfilteredRowIterator> more, RegularAndStaticColumns columns)
      {
          return add(Transformation.wrapIterator(iterator, columns), more);
      }
  
      public static RowIterator extend(RowIterator iterator, MoreRows<? super RowIterator> more)
      {
          return add(mutable(iterator), more);
      }
  
  }
  
  