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.utils;
  
  import java.util.Iterator;
  import java.util.Map;
  import java.util.TreeMap;
  import java.util.TreeSet;
  
  import org.apache.cassandra.db.DecoratedKey;
  import org.apache.cassandra.db.ReadCommand;
  import org.apache.cassandra.db.RegularAndStaticColumns;
  import org.apache.cassandra.db.partitions.PartitionIterator;
  import org.apache.cassandra.db.rows.Row;
  import org.apache.cassandra.db.rows.RowIterator;
  import org.apache.cassandra.db.rows.Unfiltered;
  import org.apache.cassandra.schema.TableMetadata;
  
  public class InMemoryPartitionIterator implements PartitionIterator
  {
      private final ReadCommand command;
      private final Iterator<Map.Entry<PartitionInfo, TreeSet<Unfiltered>>> partitions;
  
      public InMemoryPartitionIterator(ReadCommand command, TreeMap<PartitionInfo, TreeSet<Unfiltered>> rowsByPartitions)
      {
          this.command = command;
          this.partitions = rowsByPartitions.entrySet().iterator();
      }
  
      @Override
      public void close()
      {
      }
  
      @Override
      public boolean hasNext()
      {
          return partitions.hasNext();
      }
  
      @Override
      public RowIterator next()
      {
          return new InMemoryRowIterator(partitions.next());
      }
  
  
      private class InMemoryRowIterator implements RowIterator
      {
          private final PartitionInfo partitionInfo;
          private final Iterator<Unfiltered> rows;
  
          public InMemoryRowIterator(Map.Entry<PartitionInfo, TreeSet<Unfiltered>> rows)
          {
              this.partitionInfo = rows.getKey();
              this.rows = rows.getValue().iterator();
          }
  
          @Override
          public void close()
          {
          }
  
          @Override
          public boolean hasNext()
          {
              return rows.hasNext();
          }
  
          @Override
          public Row next()
          {
              return (Row) rows.next();
          }
  
          @Override
          public TableMetadata metadata()
          {
              return command.metadata();
          }
  
          @Override
          public boolean isReverseOrder()
          {
              return command.isReversed();
          }
  
          @Override
          public RegularAndStaticColumns columns()
          {
              return command.metadata().regularAndStaticColumns();
          }
  
          @Override
          public DecoratedKey partitionKey()
          {
              return partitionInfo.key;
          }
  
          @Override
          public Row staticRow()
          {
              return partitionInfo.staticRow;
          }
      }
  }
  