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.asterix.dataflow.data.nontagged.serde;
  
  import java.lang.reflect.Constructor;
  import java.lang.reflect.Field;
  import java.util.Set;
  
  import org.apache.hyracks.api.dataflow.value.ISerializerDeserializer;
  import org.junit.Test;
  import org.reflections.Reflections;
  
  public class SimpleSerializerDeserializerTest {
  
      @SuppressWarnings("rawtypes")
      @Test
      public void test() {
          Reflections reflections = new Reflections("org.apache.asterix.dataflow.data.nontagged.serde");
          Set<Class<? extends ISerializerDeserializer>> allClasses =
                  reflections.getSubTypesOf(ISerializerDeserializer.class);
  
          for (Class<? extends ISerializerDeserializer> cl : allClasses) {
              String className = cl.getName();
              if (className.endsWith("ARecordSerializerDeserializer")
                      || className.endsWith("AUnorderedListSerializerDeserializer")
                      || className.endsWith("AOrderedListSerializerDeserializer")
                      || className.endsWith("AStringSerializerDeserializer")) {
                  // Serializer/Deserializer for complex types can have (immutable) states.
                  continue;
              }
  
              // Verifies the class does not have non-static fields.
              for (Field field : cl.getDeclaredFields()) {
                  if (!java.lang.reflect.Modifier.isStatic(field.getModifiers())) {
                      throw new IllegalStateException(
                              "The serializer/deserializer " + cl.getName() + " is not stateless!");
                  }
              }
  
              // Verifies the class follows the singleton pattern.
              for (Constructor constructor : cl.getDeclaredConstructors()) {
                  if (!java.lang.reflect.Modifier.isPrivate(constructor.getModifiers())) {
                      throw new IllegalStateException("The serializer/deserializer " + cl.getName()
                              + " is not implemented as a singleton class!");
                  }
              }
          }
      }
  }
  