예제 #1
0
  @NotNull
  public Instantiator<?> findInstantiator(@NotNull Type type, @NotNull NamedTypeList types) {
    // First check if we have an immediate conversion registered. If so, we'll just use that.
    if (types.size() == 1) {
      TypeConversion conversion = findConversionFromDbValue(types.getType(0), type).orElse(null);
      if (conversion != null) return args -> conversion.convert(args.getSingleValue());
    }

    Class<?> cl = rawType(type);

    Instantiator<?> instantiator = findExplicitInstantiatorFor(cl, types).orElse(null);
    if (instantiator != null) return instantiator;

    if (!isPublic(cl.getModifiers()))
      throw new InstantiationFailureException(
          type
              + " can't be instantiated reflectively because it is not public or missing a @DalesbredConstructor-annotation");

    return candidateConstructorsSortedByDescendingParameterCount(cl)
        .map(ctor -> implicitInstantiatorFrom(ctor, types).orElse(null))
        .filter(Objects::nonNull)
        .findFirst()
        .orElseThrow(
            () ->
                new InstantiationFailureException(
                    "could not find a way to instantiate " + type + " with parameters " + types));
  }
예제 #2
0
  @Nullable
  public Object valueToDatabase(@Nullable Object value) {
    if (value == null) return null;

    TypeConversion conversion =
        typeConversionRegistry.findConversionToDb(value.getClass()).orElse(null);
    if (conversion != null) return conversion.convert(value);
    else if (value instanceof Enum<?>) return dialect.valueToDatabase(((Enum<?>) value).name());
    else return dialect.valueToDatabase(value);
  }
예제 #3
0
  @NotNull
  private static Optional<TypeConversion> findEnumConversion(@NotNull Type target) {
    if (isEnum(target)) {
      @SuppressWarnings("rawtypes")
      Class<? extends Enum> cl = rawType(target).asSubclass(Enum.class);

      return Optional.ofNullable(
          TypeConversion.fromNonNullFunction(value -> Enum.valueOf(cl, value.toString())));
    }

    return Optional.empty();
  }
예제 #4
0
  /**
   * Returns conversion for converting value of source to target, or returns null if there's no such
   * conversion.
   */
  @NotNull
  private Optional<TypeConversion> findConversionFromDbValue(
      @NotNull Type source, @NotNull Type target) {
    if (isAssignable(target, source)) return Optional.of(TypeConversion.identity());

    Optional<TypeConversion> directConversion =
        typeConversionRegistry.findConversionFromDbValue(source, target);
    if (directConversion.isPresent()) return directConversion;

    Optional<TypeConversion> arrayConversion = findArrayConversion(source, target);
    if (arrayConversion.isPresent()) return arrayConversion;

    Optional<TypeConversion> optionalConversion = findOptionalConversion(source, target);
    if (optionalConversion.isPresent()) return optionalConversion;

    Optional<TypeConversion> enumConversion = findEnumConversion(target);
    if (enumConversion.isPresent()) return enumConversion;

    return Optional.empty();
  }