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.iterators;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.cassandra.dht.Murmur3Partitioner;
  import org.apache.cassandra.index.sai.SAITester;
  import org.apache.cassandra.index.sai.utils.PrimaryKey;
  
  public class LongIterator extends KeyRangeIterator
  {
      private final List<PrimaryKey> keys;
      private int currentIdx = 0;
  
      public static LongIterator newEmptyIterator()
      {
          return new LongIterator();
      }
  
      private LongIterator()
      {
          super(null, null, 0);
          keys = null;
      }
  
      public LongIterator(long[] tokens)
      {
          super(tokens.length == 0 ? null : fromToken(tokens[0]), tokens.length == 0 ? null : fromToken(tokens[tokens.length - 1]), tokens.length);
  
          this.keys = new ArrayList<>(tokens.length);
          for (long token : tokens)
              this.keys.add(fromToken(token));
      }
  
      @Override
      protected PrimaryKey computeNext()
      {
          if (currentIdx >= keys.size())
              return endOfData();
  
          return keys.get(currentIdx++);
      }
  
      @Override
      protected void performSkipTo(PrimaryKey nextKey)
      {
          for ( ; currentIdx < keys.size(); currentIdx++)
          {
              PrimaryKey key = keys.get(currentIdx);
              if (key.compareTo(nextKey, false) >= 0)
                  break;
          }
      }
  
      @Override
      public void close()
      {}
  
      public static PrimaryKey fromToken(long token)
      {
          return SAITester.TEST_FACTORY.create(new Murmur3Partitioner.LongToken(token));
      }
  
  
      public static List<Long> convert(KeyRangeIterator tokens)
      {
          List<Long> results = new ArrayList<>();
          while (tokens.hasNext())
              results.add(tokens.next().token().getLongValue());
  
          return results;
      }
  
      public static List<Long> convert(final long... nums)
      {
          return new ArrayList<>(nums.length)
          {{
              for (long n : nums)
                  add(n);
          }};
      }
  }
  