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.index.sai.memory;
  
  import java.util.SortedSet;
  
  import org.apache.cassandra.db.PartitionPosition;
  import org.apache.cassandra.dht.AbstractBounds;
  import org.apache.cassandra.index.sai.utils.PrimaryKey;
  
  /**
   * An {@link InMemoryKeyRangeIterator} that filters the returned {@link PrimaryKey}s based on the provided keyRange
   */
  public class FilteringInMemoryKeyRangeIterator extends InMemoryKeyRangeIterator
  {
      private final AbstractBounds<PartitionPosition> keyRange;
  
      public FilteringInMemoryKeyRangeIterator(SortedSet<PrimaryKey> keys, AbstractBounds<PartitionPosition> keyRange)
      {
          super(keys);
          this.keyRange = keyRange;
      }
  
      @Override
      protected PrimaryKey computeNext()
      {
          PrimaryKey key = computeNextKey();
          while (key != null && !keyRange.contains(key.partitionKey()))
              key = computeNextKey();
          return key == null ? endOfData() : key;
      }
  }
  