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   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
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   *
   *     http://www.apache.org/licenses/LICENSE-2.0
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   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
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   * See the License for the specific language governing permissions and
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  package org.apache.cassandra.db.aggregation;
  
  import java.nio.ByteBuffer;
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.Collections;
  
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import org.apache.cassandra.config.DatabaseDescriptor;
  import org.apache.cassandra.cql3.ColumnIdentifier;
  import org.apache.cassandra.cql3.terms.Constants.Literal;
  import org.apache.cassandra.cql3.QueryOptions;
  import org.apache.cassandra.cql3.VariableSpecifications;
  import org.apache.cassandra.cql3.functions.ScalarFunction;
  import org.apache.cassandra.cql3.functions.TimeFcts;
  import org.apache.cassandra.cql3.selection.Selectable;
  import org.apache.cassandra.cql3.selection.Selector;
  import org.apache.cassandra.db.Clustering;
  import org.apache.cassandra.db.ClusteringComparator;
  import org.apache.cassandra.db.DecoratedKey;
  import org.apache.cassandra.db.marshal.AbstractType;
  import org.apache.cassandra.db.marshal.Int32Type;
  import org.apache.cassandra.db.marshal.ReversedType;
  import org.apache.cassandra.db.marshal.TimestampType;
  import org.apache.cassandra.schema.ColumnMetadata;
  import org.apache.cassandra.schema.TableMetadata;
  
  import static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertTrue;
  
  public class GroupMakerTest
  {
      @BeforeClass
      public static void setupDD()
      {
          DatabaseDescriptor.daemonInitialization();
      }
  
      @Test
      public void testIsNewGroupWithClusteringColumns()
      {
          ClusteringComparator comparator = newComparator(false, false, false);
          GroupMaker groupMaker = GroupMaker.newPkPrefixGroupMaker(comparator, 2);
  
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering(1, 1, 1)));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering(1, 1, 2)));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering(1, 1, 3)));
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering(1, 2, 1)));
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering(1, 3, 1)));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering(1, 3, 2)));
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering(2, 1, 1)));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering(2, 1, 2)));
  
          assertTrue(groupMaker.isNewGroup(partitionKey(2), clustering(2, 2, 1)));
      }
  
      @Test
      public void testIsNewGroupWithOneClusteringColumnsPrefix()
      {
          ClusteringComparator comparator = newComparator(false, false, false);
          GroupMaker groupMaker = GroupMaker.newPkPrefixGroupMaker(comparator, 1);
  
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering(1, 1, 1)));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering(1, 1, 2)));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering(1, 1, 3)));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering(1, 2, 1)));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering(1, 3, 1)));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering(1, 3, 2)));
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering(2, 1, 1)));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering(2, 1, 2)));
  
          assertTrue(groupMaker.isNewGroup(partitionKey(2), clustering(2, 2, 1)));
      }
  
      @Test
      public void testIsNewGroupWithReversedClusteringColumns()
      {
          ClusteringComparator comparator = newComparator(true, true, true);
  
          GroupMaker groupMaker = GroupMaker.newPkPrefixGroupMaker(comparator, 2);
  
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering(1, 3, 2)));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering(1, 3, 1)));
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering(1, 2, 1)));
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering(1, 1, 3)));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering(1, 1, 2)));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering(1, 1, 1)));
  
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering(2, 1, 2)));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering(2, 1, 1)));
  
          assertTrue(groupMaker.isNewGroup(partitionKey(2), clustering(2, 2, 1)));
      }
  
      @Test
      public void testIsNewGroupWithOneReversedClusteringColumns()
      {
          ClusteringComparator comparator = newComparator(true, false, false);
  
          GroupMaker groupMaker = GroupMaker.newPkPrefixGroupMaker(comparator, 2);
  
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering(1, 3, 1)));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering(1, 3, 2)));
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering(1, 2, 1)));
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering(1, 1, 1)));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering(1, 1, 2)));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering(1, 1, 3)));
  
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering(2, 1, 1)));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering(2, 1, 2)));
  
          assertTrue(groupMaker.isNewGroup(partitionKey(2), clustering(2, 2, 1)));
      }
  
      @Test
      public void testIsNewGroupWithStaticClusteringColumns()
      {
          ClusteringComparator comparator = newComparator(false, false, false);
          GroupMaker groupMaker = GroupMaker.newPkPrefixGroupMaker(comparator, 2);
  
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering(1, 1, 1)));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering(1, 1, 2)));
  
          assertTrue(groupMaker.isNewGroup(partitionKey(2), Clustering.STATIC_CLUSTERING));
          assertTrue(groupMaker.isNewGroup(partitionKey(3), Clustering.STATIC_CLUSTERING));
          assertTrue(groupMaker.isNewGroup(partitionKey(4), clustering(1, 1, 2)));
      }
  
      @Test
      public void testIsNewGroupWithOnlyPartitionKeyComponents()
      {
          ClusteringComparator comparator = newComparator(false, false, false);
          GroupMaker goupMaker = GroupMaker.newPkPrefixGroupMaker(comparator, 2);
  
          assertTrue(goupMaker.isNewGroup(partitionKey(1, 1), clustering(1, 1, 1)));
          assertFalse(goupMaker.isNewGroup(partitionKey(1, 1), clustering(1, 1, 2)));
  
          assertTrue(goupMaker.isNewGroup(partitionKey(1, 2), clustering(1, 1, 2)));
          assertTrue(goupMaker.isNewGroup(partitionKey(1, 2), clustering(2, 2, 2)));
  
          assertTrue(goupMaker.isNewGroup(partitionKey(2, 2), clustering(1, 1, 2)));
      }
  
      @Test
      public void testIsNewGroupWithFunction()
      {
          GroupMaker groupMaker = newSelectorGroupMaker(false);
  
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:10:00 UTC")));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:12:00 UTC")));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:14:00 UTC")));
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:15:00 UTC")));
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:21:00 UTC")));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:22:00 UTC")));
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:26:00 UTC")));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:26:20 UTC")));
  
          assertTrue(groupMaker.isNewGroup(partitionKey(2), clustering("2016-09-27 16:26:20 UTC")));
          assertTrue(groupMaker.isNewGroup(partitionKey(2), clustering("2016-09-27 16:30:00 UTC")));
      }
  
      @Test
      public void testIsNewGroupWithFunctionAndReversedOrder()
      {
          GroupMaker groupMaker = newSelectorGroupMaker(true);
  
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:26:20 UTC")));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:26:00 UTC")));
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:22:00 UTC")));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:21:00 UTC")));
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:15:00 UTC")));
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:14:00 UTC")));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:12:00 UTC")));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:10:00 UTC")));
  
          assertTrue(groupMaker.isNewGroup(partitionKey(2), clustering("2016-09-27 16:30:00 UTC")));
          assertTrue(groupMaker.isNewGroup(partitionKey(2), clustering("2016-09-27 16:26:20 UTC")));
      }
  
      @Test
      public void testIsNewGroupWithFunctionWithStaticColumn()
      {
          GroupMaker groupMaker = newSelectorGroupMaker(false);
  
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:10:00 UTC")));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:12:00 UTC")));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:14:00 UTC")));
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:15:00 UTC")));
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:21:00 UTC")));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:22:00 UTC")));
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:26:00 UTC")));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:26:20 UTC")));
  
          assertTrue(groupMaker.isNewGroup(partitionKey(2), Clustering.STATIC_CLUSTERING));
          assertTrue(groupMaker.isNewGroup(partitionKey(3), Clustering.STATIC_CLUSTERING));
          assertTrue(groupMaker.isNewGroup(partitionKey(4), clustering("2016-09-27 16:26:20 UTC")));
          assertTrue(groupMaker.isNewGroup(partitionKey(4), clustering("2016-09-27 16:30:00 UTC")));
      }
  
      @Test
      public void testIsNewGroupWithFunctionAndReversedOrderWithStaticColumns()
      {
          GroupMaker groupMaker = newSelectorGroupMaker(true);
  
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:26:20 UTC")));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:26:00 UTC")));
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:22:00 UTC")));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:21:00 UTC")));
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:15:00 UTC")));
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:14:00 UTC")));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:12:00 UTC")));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering("2016-09-27 16:10:00 UTC")));
  
          assertTrue(groupMaker.isNewGroup(partitionKey(2), Clustering.STATIC_CLUSTERING));
          assertTrue(groupMaker.isNewGroup(partitionKey(3), Clustering.STATIC_CLUSTERING));
          assertTrue(groupMaker.isNewGroup(partitionKey(4), clustering("2016-09-27 16:30:00 UTC")));
          assertTrue(groupMaker.isNewGroup(partitionKey(4), clustering("2016-09-27 16:26:20 UTC")));
      }
  
      @Test
      public void testIsNewGroupWithPrefixAndFunction()
      {
          GroupMaker groupMaker = newSelectorGroupMaker(false, false);
  
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering(1, "2016-09-27 16:10:00 UTC")));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering(1, "2016-09-27 16:12:00 UTC")));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering(1, "2016-09-27 16:14:00 UTC")));
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering(1, "2016-09-27 16:15:00 UTC")));
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering(2, "2016-09-27 16:16:00 UTC")));
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering(2, "2016-09-27 16:22:00 UTC")));
          assertTrue(groupMaker.isNewGroup(partitionKey(1), clustering(2, "2016-09-27 16:26:00 UTC")));
          assertFalse(groupMaker.isNewGroup(partitionKey(1), clustering(2, "2016-09-27 16:26:20 UTC")));
  
          assertTrue(groupMaker.isNewGroup(partitionKey(2), clustering(1, "2016-09-27 16:26:20 UTC")));
          assertTrue(groupMaker.isNewGroup(partitionKey(2), clustering(1, "2016-09-27 16:30:00 UTC")));
      }
  
      private static DecoratedKey partitionKey(int... components)
      {
          ByteBuffer buffer = ByteBuffer.allocate(components.length * 4);
          for (int component : components)
          {
              buffer.putInt(component);
          }
          buffer.flip();
          return DatabaseDescriptor.getPartitioner().decorateKey(buffer);
      }
  
      private static Clustering<?> clustering(int... components)
      {
          return Clustering.make(toByteBufferArray(components));
      }
  
      private static Clustering<?> clustering(String timeComponent)
      {
          ByteBuffer buffer = TimestampType.instance.fromString(timeComponent);
          return Clustering.make(buffer);
      }
  
      private static Clustering<?> clustering(int component, String timeComponent)
      {
          ByteBuffer first = Int32Type.instance.decompose(component);
          ByteBuffer second = TimestampType.instance.fromString(timeComponent);
          return Clustering.make(first, second);
      }
  
      private static ByteBuffer[] toByteBufferArray(int[] values)
      {
          ByteBuffer[] buffers = new ByteBuffer[values.length];
  
          for (int i = 0; i < values.length; i++)
          {
              buffers[i] = Int32Type.instance.decompose(values[i]);
          }
  
          return buffers;
      }
  
      private static ClusteringComparator newComparator(boolean... reversed)
      {
          AbstractType<?>[] types = new AbstractType<?>[reversed.length];
          for (int i = 0, m = reversed.length; i < m; i++)
              types[i] = reversed[i] ? ReversedType.getInstance(Int32Type.instance) : Int32Type.instance;
  
          return new ClusteringComparator(types);
      }
  
      private GroupMaker newSelectorGroupMaker(boolean... reversed)
      {
          TableMetadata.Builder builder = TableMetadata.builder("keyspace", "test")
                                                       .addPartitionKeyColumn("partition_key", Int32Type.instance);
  
          int last = reversed.length - 1;
          for (int i = 0; i < reversed.length; i++)
          {
              AbstractType<?> type = i == last ? TimestampType.instance : Int32Type.instance;
              builder.addClusteringColumn("clustering" + i, reversed[i] ? ReversedType.getInstance(type) : type);
          }
  
          TableMetadata table = builder.build();
  
          ColumnMetadata column = table.getColumn(new ColumnIdentifier("clustering" + last, false));
  
          Selectable.WithTerm duration = new Selectable.WithTerm(Literal.duration("5m"));
          Selectable.WithTerm startTime = new Selectable.WithTerm(Literal.string("2016-09-27 16:00:00 UTC"));
          ScalarFunction function = TimeFcts.FloorTimestampFunction.newInstanceWithStartTimeArgument();
  
          Selectable.WithFunction selectable = new Selectable.WithFunction(function, Arrays.asList(column, duration, startTime));
          Selector.Factory factory = selectable.newSelectorFactory(table, null, new ArrayList<>(), VariableSpecifications.empty());
          Selector selector = factory.newInstance(QueryOptions.DEFAULT);
  
          return GroupMaker.newSelectorGroupMaker(table.comparator, reversed.length, selector, Collections.singletonList(column));
      }
  }
  