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.DeletionPurger;
  import org.apache.cassandra.db.rows.*;
  
  public final class Filter extends Transformation
  {
      private final long nowInSec;
      private final boolean enforceStrictLiveness;
  
      public Filter(long nowInSec, boolean enforceStrictLiveness)
      {
          this.nowInSec = nowInSec;
          this.enforceStrictLiveness = enforceStrictLiveness;
      }
  
      @Override
      protected RowIterator applyToPartition(BaseRowIterator iterator)
      {
          return iterator instanceof UnfilteredRows
               ? new FilteredRows(this, (UnfilteredRows) iterator)
               : new FilteredRows((UnfilteredRowIterator) iterator, this);
      }
  
      @Override
      protected Row applyToStatic(Row row)
      {
          if (row.isEmpty())
              return Rows.EMPTY_STATIC_ROW;
  
          row = row.purge(DeletionPurger.PURGE_ALL, nowInSec, enforceStrictLiveness);
          return row == null ? Rows.EMPTY_STATIC_ROW : row;
      }
  
      @Override
      protected Row applyToRow(Row row)
      {
          return row.purge(DeletionPurger.PURGE_ALL, nowInSec, enforceStrictLiveness);
      }
  
      @Override
      protected RangeTombstoneMarker applyToMarker(RangeTombstoneMarker marker)
      {
          return null;
      }
  }
  