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.db.marshal;
  
  import java.nio.ByteBuffer;
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.List;
  import java.util.Random;
  
  import org.junit.AfterClass;
  import org.junit.Assert;
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import org.apache.cassandra.cql3.FieldIdentifier;
  import org.apache.cassandra.utils.ByteBufferUtil;
  
  import static org.apache.cassandra.db.marshal.ValueAccessors.ACCESSORS;
  
  public class CompositeAndTupleTypesTest
  {
  
      private static final TestNativeDataAllocator allocator = new TestNativeDataAllocator();
      @BeforeClass
      public static void setSetMemoryAllocator()
      {
          NativeAccessor.setNativeMemoryAllocator(allocator);
      }
  
      @AfterClass
      public static void releaseMemory()
      {
          allocator.close();
      }
  
      interface TypeFactory<T extends AbstractType<?>> { T createType(List<AbstractType<?>> types); }
      interface ValueCombiner<V> { V combine(AbstractType<?> type, ValueAccessor<V> accessor, V[] values); }
  
      public static Object[] createValues(ValueGenerator[] generators, Random random)
      {
          Object[] values = new Object[generators.length];
          for (int i=0; i<generators.length; i++)
              values[i] = generators[i].nextValue(random);
          return values;
      }
  
      public static ByteBuffer[] decompose(ValueGenerator[] generators, Object[] values)
      {
          assert generators.length == values.length;
          ByteBuffer[] decomposed = new ByteBuffer[generators.length];
          for (int i=0; i<generators.length; i++)
          {
              decomposed[i] = ((AbstractType<Object>) generators[i].getType()).decompose(values[i]);
          }
          return decomposed;
      }
  
      public static <S, D> D[] convert(S[] src, ValueAccessor<S> srcAccessor, ValueAccessor<D> dstAccessor)
      {
          D[] dst = dstAccessor.createArray(src.length);
          for (int i=0; i<src.length; i++)
              dst[i] = dstAccessor.convert(src[i], srcAccessor);
          return dst;
      }
  
      public static <V> Object[] compose(ValueGenerator[] generators, V[] values, ValueAccessor<V> accessor)
      {
          assert generators.length == values.length;
  
          Object[] composed = new Object[generators.length];
          for (int i=0; i<generators.length; i++)
          {
              composed[i] = ((AbstractType<Object>) generators[i].getType()).compose(values[i], accessor);
          }
          return composed;
      }
  
      public <AT extends AbstractType<?>> void testSerializationDeserialization(TypeFactory<AT> typeFactory, ValueCombiner combiner)
      {
          for (int i=0; i<100; i++)
          {
              Random random = new Random(i);
              ValueGenerator[] generators = ValueGenerator.randomGenerators(random, 100);
              AT type = typeFactory.createType(ValueGenerator.toTypes(generators));
  
              for (int j=0; j<100; j++)
              {
                  Object[] expected = createValues(generators, random);
                  for (ValueAccessor<Object> srcAccessor : ACCESSORS)
                  {
                      ByteBuffer[] srcBuffers = decompose(generators, expected);
                      Object[] srcValues = convert(srcBuffers, ByteBufferAccessor.instance, srcAccessor);
                      Object srcJoined = combiner.combine(type, srcAccessor, srcValues);
                      String srcString  = type.getString(srcJoined, srcAccessor);
  
                      for (ValueAccessor<Object> dstAccessor : ACCESSORS)
                      {
                          // convert data types and deserialize with
                          Object[] dstValues = convert(srcValues, srcAccessor, dstAccessor);
                          Object dstJoined = combiner.combine(type, dstAccessor, dstValues);
                          String dstString = type.getString(dstJoined, dstAccessor);
  
                          Object[] composed = compose(generators, dstValues, dstAccessor);
                          Assert.assertArrayEquals(expected, composed);
                          ValueAccessors.assertDataEquals(srcJoined, srcAccessor, dstJoined, dstAccessor);
                          Assert.assertEquals(srcString, dstString);
                      }
                  }
                  allocator.releaseMemory();
              }
          }
      }
  
      @Test
      public void tuple()
      {
          testSerializationDeserialization(TupleType::new, getTupleValueCombiner());
      }
  
      private static <V> ValueCombiner<V> getTupleValueCombiner()
      {
          return (type, accessor, values) -> TupleType.pack(accessor, Arrays.asList(values));
      }
  
      @Test
      public void userType()
      {
          TypeFactory<UserType> factory = types -> {
              List<FieldIdentifier> names = new ArrayList<>(types.size());
              for (int i=0; i<types.size(); i++)
              {
                  names.add(FieldIdentifier.forUnquoted("t" + i));
              }
              return new UserType("ks", ByteBufferUtil.bytes("user_type"), names, types, false);
          };
          testSerializationDeserialization(factory, getTupleValueCombiner());
      }
  
      @Test
      public void composite()
      {
          testSerializationDeserialization(CompositeType::new, (type, accessor, values) -> CompositeType.build(accessor, values));
      }
  }
  