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   * 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 java.io.IOException;
  import java.nio.ByteBuffer;
  import java.util.Random;
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.atomic.AtomicReference;
  import java.util.function.Function;
  
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import org.apache.cassandra.config.DatabaseDescriptor;
  import org.apache.cassandra.db.Clustering;
  import org.apache.cassandra.db.SerializationHeader;
  import org.apache.cassandra.db.filter.ColumnFilter;
  import org.apache.cassandra.db.marshal.BytesType;
  import org.apache.cassandra.db.marshal.IntegerType;
  import org.apache.cassandra.io.util.DataInputBuffer;
  import org.apache.cassandra.io.util.DataOutputBuffer;
  import org.apache.cassandra.net.MessagingService;
  import org.apache.cassandra.schema.TableMetadata;
  
  import static org.assertj.core.api.Assertions.assertThatIOException;
  import static org.junit.Assert.assertEquals;
  
  public class UnfilteredSerializerTest
  {
      private static TableMetadata md;
  
      @BeforeClass
      public static void beforeClass()
      {
          DatabaseDescriptor.daemonInitialization();
  
          md = TableMetadata.builder("ks", "cf")
                            .addPartitionKeyColumn("pk", IntegerType.instance)
                            .addRegularColumn("v1", BytesType.instance)
                            .addRegularColumn("v2", BytesType.instance)
                            .build();
      }
  
      @Test
      public void testRowSerDe() throws IOException
      {
          // test serialization and deserialization of a row body
          testRowBodySerDe(10, Function.identity());
      }
  
      @Test
      public void testRowSerDeWithCorruption() throws IOException
      {
          // test serialization and deserialization of a row body when the row is corrupted in the way that the actual
          // row content is larger than the row size serialized in the preamble
          ByteBuffer largeRow = getSerializedRow(50);
          assertThatIOException().isThrownBy(() -> testRowBodySerDe(10, buf -> replaceRowContent(buf, largeRow)))
                                 .withMessageMatching("EOF after \\d+ bytes out of 50");
      }
  
      public static void testRowBodySerDe(int cellSize, Function<ByteBuffer, ByteBuffer> transform) throws IOException
      {
          Random random = new Random();
          ByteBuffer data1 = ByteBuffer.allocate(cellSize);
          ByteBuffer data2 = ByteBuffer.allocate(cellSize);
          random.nextBytes(data1.array());
          random.nextBytes(data2.array());
  
          Row.Builder builder = BTreeRow.sortedBuilder();
          builder.newRow(Clustering.EMPTY);
          builder.addCell(BufferCell.live(md.regularColumns().getSimple(0), TimeUnit.MILLISECONDS.toMicros(System.currentTimeMillis()), data1.duplicate()));
          builder.addCell(BufferCell.live(md.regularColumns().getSimple(1), TimeUnit.MILLISECONDS.toMicros(System.currentTimeMillis()), data2.duplicate()));
          Row writtenRow = builder.build();
  
          try (DataOutputBuffer out = new DataOutputBuffer())
          {
              UnfilteredSerializer.serializer.serialize(writtenRow, new SerializationHelper(SerializationHeader.makeWithoutStats(md)), out, 0, MessagingService.current_version);
              out.flush();
              try (DataInputBuffer in = new DataInputBuffer(transform.apply(out.asNewBuffer()), false))
              {
                  builder = BTreeRow.sortedBuilder();
                  DeserializationHelper helper = new DeserializationHelper(md, MessagingService.current_version, DeserializationHelper.Flag.LOCAL, ColumnFilter.all(md));
                  Unfiltered readRow = UnfilteredSerializer.serializer.deserialize(in, SerializationHeader.makeWithoutStats(md), helper, builder);
                  assertEquals(writtenRow, readRow);
              }
          }
      }
  
      private ByteBuffer getSerializedRow(int cellSize) throws IOException
      {
          AtomicReference<ByteBuffer> rowData = new AtomicReference<>();
          testRowBodySerDe(cellSize, buf -> {
              rowData.set(buf.duplicate());
              return buf;
          });
          return rowData.get();
      }
  
      private static ByteBuffer replaceRowContent(ByteBuffer original, ByteBuffer replacement)
      {
          try (DataOutputBuffer out = new DataOutputBuffer();
               DataInputBuffer origIn = new DataInputBuffer(original, true);
               DataInputBuffer replIn = new DataInputBuffer(replacement, false))
          {
              out.writeByte(origIn.readByte()); // flag
              out.writeUnsignedVInt(origIn.readUnsignedVInt()); // row size
              replIn.readByte(); // skip flag
              replIn.readUnsignedVInt(); // skip row size
              out.write(replacement);
              out.close();
              return out.asNewBuffer();
          }
          catch (IOException ex)
          {
              throw new RuntimeException(ex);
          }
      }
  }
  