How to use

recursivelyRegisterGenericType

method

in

org.apache.flink.api.java.typeutils.runtime.kryo.Serializers

private static void recursivelyRegisterGenericType(Type fieldType, ExecutionConfig config, Set<Class<?>> alreadySeen) {
  if (fieldType instanceof ParameterizedType) {
    // field has generics
    ParameterizedType parameterizedFieldType = (ParameterizedType) fieldType;
    
    for (Type t: parameterizedFieldType.getActualTypeArguments()) {
      if (TypeExtractionUtils.isClassType(t) ) {
        recursivelyRegisterType(TypeExtractionUtils.typeToClass(t), config, alreadySeen);
      }
    }
    recursivelyRegisterGenericType(parameterizedFieldType.getRawType(), config, alreadySeen);
  }
  else if (fieldType instanceof GenericArrayType) {
    GenericArrayType genericArrayType = (GenericArrayType) fieldType;
    recursivelyRegisterGenericType(genericArrayType.getGenericComponentType(), config, alreadySeen);
  }
  else if (fieldType instanceof Class) {
    Class<?> clazz = (Class<?>) fieldType;
    recursivelyRegisterType(clazz, config, alreadySeen);
  }
}

public static void recursivelyRegisterType(Class<?> type, ExecutionConfig config, Set<Class<?>> alreadySeen) {
  // don't register or remember primitives
  if (type == null || type.isPrimitive() || type == Object.class) {
    return;
  }
  
  // prevent infinite recursion for recursive types
  if (!alreadySeen.add(type)) {
    return;
  }
  
  if (type.isArray()) {
    recursivelyRegisterType(type.getComponentType(), config, alreadySeen);
  }
  else {
    config.registerKryoType(type);
    // add serializers for Avro type if necessary
    AvroUtils.getAvroUtils().addAvroSerializersIfRequired(config, type);
    Field[] fields = type.getDeclaredFields();
    for (Field field : fields) {
      if (Modifier.isStatic(field.getModifiers()) || Modifier.isTransient(field.getModifiers())) {
        continue;
      }
      Type fieldType = field.getGenericType();
      recursivelyRegisterGenericType(fieldType, config, alreadySeen);
    }
  }
}

private static void recursivelyRegisterGenericType(Type fieldType, ExecutionConfig config, Set<Class<?>> alreadySeen) {
  if (fieldType instanceof ParameterizedType) {
    // field has generics
    ParameterizedType parameterizedFieldType = (ParameterizedType) fieldType;
    
    for (Type t: parameterizedFieldType.getActualTypeArguments()) {
      if (TypeExtractionUtils.isClassType(t) ) {
        recursivelyRegisterType(TypeExtractionUtils.typeToClass(t), config, alreadySeen);
      }
    }
    recursivelyRegisterGenericType(parameterizedFieldType.getRawType(), config, alreadySeen);
  }
  else if (fieldType instanceof GenericArrayType) {
    GenericArrayType genericArrayType = (GenericArrayType) fieldType;
    recursivelyRegisterGenericType(genericArrayType.getGenericComponentType(), config, alreadySeen);
  }
  else if (fieldType instanceof Class) {
    Class<?> clazz = (Class<?>) fieldType;
    recursivelyRegisterType(clazz, config, alreadySeen);
  }
}

private static void recursivelyRegisterGenericType(Type fieldType, ExecutionConfig config, Set<Class<?>> alreadySeen) {
  if (fieldType instanceof ParameterizedType) {
    // field has generics
    ParameterizedType parameterizedFieldType = (ParameterizedType) fieldType;
    
    for (Type t: parameterizedFieldType.getActualTypeArguments()) {
      if (TypeExtractionUtils.isClassType(t) ) {
        recursivelyRegisterType(TypeExtractionUtils.typeToClass(t), config, alreadySeen);
      }
    }
    recursivelyRegisterGenericType(parameterizedFieldType.getRawType(), config, alreadySeen);
  }
  else if (fieldType instanceof GenericArrayType) {
    GenericArrayType genericArrayType = (GenericArrayType) fieldType;
    recursivelyRegisterGenericType(genericArrayType.getGenericComponentType(), config, alreadySeen);
  }
  else if (fieldType instanceof Class) {
    Class<?> clazz = (Class<?>) fieldType;
    recursivelyRegisterType(clazz, config, alreadySeen);
  }
}

public static void recursivelyRegisterType(Class<?> type, ExecutionConfig config, Set<Class<?>> alreadySeen) {
  // don't register or remember primitives
  if (type == null || type.isPrimitive() || type == Object.class) {
    return;
  }
  
  // prevent infinite recursion for recursive types
  if (!alreadySeen.add(type)) {
    return;
  }
  
  if (type.isArray()) {
    recursivelyRegisterType(type.getComponentType(), config, alreadySeen);
  }
  else {
    config.registerKryoType(type);
    // add serializers for Avro type if necessary
    AvroUtils.getAvroUtils().addAvroSerializersIfRequired(config, type);
    Field[] fields = type.getDeclaredFields();
    for (Field field : fields) {
      if (Modifier.isStatic(field.getModifiers()) || Modifier.isTransient(field.getModifiers())) {
        continue;
      }
      Type fieldType = field.getGenericType();
      recursivelyRegisterGenericType(fieldType, config, alreadySeen);
    }
  }
}

public static void recursivelyRegisterType(Class<?> type, ExecutionConfig config, Set<Class<?>> alreadySeen) {
  // don't register or remember primitives
  if (type == null || type.isPrimitive() || type == Object.class) {
    return;
  }
  
  // prevent infinite recursion for recursive types
  if (!alreadySeen.add(type)) {
    return;
  }
  
  if (type.isArray()) {
    recursivelyRegisterType(type.getComponentType(), config, alreadySeen);
  }
  else {
    config.registerKryoType(type);
    // add serializers for Avro type if necessary
    AvroUtils.getAvroUtils().addAvroSerializersIfRequired(config, type);
    Field[] fields = type.getDeclaredFields();
    for (Field field : fields) {
      if (Modifier.isStatic(field.getModifiers()) || Modifier.isTransient(field.getModifiers())) {
        continue;
      }
      Type fieldType = field.getGenericType();
      recursivelyRegisterGenericType(fieldType, config, alreadySeen);
    }
  }
}