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.HashMap;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Map;
  import java.util.Random;
  import java.util.Set;
  
  import org.junit.AfterClass;
  import org.junit.Assert;
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import org.apache.cassandra.cql3.CQL3Type;
  
  import static org.apache.cassandra.db.marshal.ValueAccessors.ACCESSORS;
  
  public class CollectionTypesTest
  {
  
      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 CollectionType> { T createType(AbstractType<?> keyType, AbstractType<?> valType); }
      interface ValueFactory<T> { T createValue(ValueGenerator keyGen, ValueGenerator valGen, int size, Random random); }
  
      static <CT extends CollectionType, T> void testSerializationDeserialization(TypeFactory<CT> typeFactory, ValueFactory<T> valueFactory, ValueGenerator keyType)
      {
          for (ValueGenerator valueType : ValueGenerator.GENERATORS)
          {
              CT type = typeFactory.createType(keyType != null ? keyType.getType() : null, valueType.getType());
              CQL3Type.Collection cql3Type = new CQL3Type.Collection(type);
  
              for (int i=0; i<500; i++)
              {
                  Random random = new Random(i);
                  int size = random.nextInt(1000);
                  T expected = valueFactory.createValue(keyType, valueType, size, random);
  
                  for (ValueAccessor<Object> srcAccessor : ACCESSORS)
                  {
                      ByteBuffer srcBuffer = type.decompose(expected);
                      Object srcBytes = srcAccessor.convert(srcBuffer, ByteBufferAccessor.instance);
                      String srcString = type.getString(srcBytes, srcAccessor);
  
                      for (ValueAccessor<Object> dstAccessor : ACCESSORS)
                      {
                          Object dstBytes = dstAccessor.convert(srcBytes, srcAccessor);
                          String dstString = type.getString(dstBytes, dstAccessor);
                          T composed = (T) type.compose(dstBytes, dstAccessor);
                          Assert.assertEquals(expected, composed);
                          ValueAccessors.assertDataEquals(srcBytes, srcAccessor, dstBytes, dstAccessor);
                          Assert.assertEquals(srcString, dstString);
                      }
                  }
                  allocator.releaseMemory();
              }
          }
      }
  
      static <CT extends CollectionType, T> void testSerializationDeserialization(TypeFactory<CT> typeFactory, ValueFactory<T> valueFactory)
      {
          for (ValueGenerator keyType : ValueGenerator.GENERATORS)
              testSerializationDeserialization(typeFactory, valueFactory, keyType);
  
      }
  
      private static List<Object> randomList(ValueGenerator keyGen, ValueGenerator valGen, int size, Random random)
      {
          List<Object> list = new ArrayList<>();
          for (int k=0; k<size; k++)
              list.add(valGen.nextValue(random));
          return list;
      }
  
      @Test
      public void list()
      {
          testSerializationDeserialization((k, v) -> ListType.getInstance(v, false), CollectionTypesTest::randomList, null);
      }
  
      private static Map<Object, Object> randomMap(ValueGenerator keyGen, ValueGenerator valGen, int size, Random random)
      {
          Map<Object, Object> map = new HashMap<>();
          for (int k=0; k<size; k++)
              map.put(keyGen.nextValue(random), valGen.nextValue(random));
          return map;
      }
  
      @Test
      public void map()
      {
          testSerializationDeserialization((k, v) -> MapType.getInstance(k, v, false), CollectionTypesTest::randomMap);
      }
  
      private static Set<Object> randomSet(ValueGenerator keyGen, ValueGenerator valGen, int size, Random random)
      {
          Set<Object> set = new HashSet<>();
          for (int k=0; k<size; k++)
              set.add(valGen.nextValue(random));
          return set;
      }
  
      @Test
      public void set()
      {
          testSerializationDeserialization((k, v) -> SetType.getInstance(v, false), CollectionTypesTest::randomSet, null);
      }
  }
  