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.rows;
  
  import org.apache.cassandra.db.DataRange;
  import org.apache.cassandra.db.DecoratedKey;
  import org.apache.cassandra.db.Slices;
  import org.apache.cassandra.db.filter.ColumnFilter;
  import org.apache.cassandra.db.partitions.UnfilteredPartitionIterator;
  import org.apache.cassandra.io.sstable.SSTableReadsListener;
  
  /**
   * Common data access interface for sstables and memtables.
   */
  public interface UnfilteredSource
  {
      /**
       * Returns a row iterator for the given partition, applying the specified row and column filters.
       *
       * @param key the partition key
       * @param slices the row ranges to return
       * @param columnFilter filter to apply to all returned partitions
       * @param reversed true if the content should be returned in reverse order
       * @param listener a listener used to handle internal read events
       */
      UnfilteredRowIterator rowIterator(DecoratedKey key,
                                        Slices slices,
                                        ColumnFilter columnFilter,
                                        boolean reversed,
                                        SSTableReadsListener listener);
  
      default UnfilteredRowIterator rowIterator(DecoratedKey key)
      {
          return rowIterator(key, Slices.ALL, ColumnFilter.NONE, false, SSTableReadsListener.NOOP_LISTENER);
      }
  
      /**
       * Returns a partition iterator for the given data range.
       *
       * @param columnFilter filter to apply to all returned partitions
       * @param dataRange the partition and clustering range queried
       * @param listener a listener used to handle internal read events
       */
      UnfilteredPartitionIterator partitionIterator(ColumnFilter columnFilter,
                                                    DataRange dataRange,
                                                    SSTableReadsListener listener);
  
      /** Minimum timestamp of all stored data */
      long getMinTimestamp();
  
      /** Minimum local deletion time in the memtable */
      long getMinLocalDeletionTime();
  }
  