// from GSON project, simplified
// (Note: There is a ParameterizedTypeImpl in the JDK, but it is not public
// and has a different constructor signature)
static persistable final class ParameterizedTypeImpl implements ParameterizedType {
  private /*final*/ Type ownerType;
  private /*final*/ Type rawType;
  private /*final*/ Type[] typeArguments;

  *(Type *ownerType, Type *rawType, Type... *typeArguments) {}

  public Type[] getActualTypeArguments() {
    return typeArguments;
  }

  public Type getRawType() {
    return rawType;
  }

  public Type getOwnerType() {
    return ownerType;
  }

  @Override public boolean equals(Object other) {
    if (other cast ParameterizedType)
      ret eq(ownerType, other.getOwnerType())
        && eq(rawType, other.getRawType())
        && eq(asList(typeArguments), asList(other.getActualTypeArguments()));
    false;
  }

  @Override public int hashCode() {
    return Arrays.hashCode(typeArguments)
        ^ rawType.hashCode()
        ^ _hashCode(ownerType);
  }

  @Override public String toString() {
    int length = typeArguments.length;
    if (length == 0)
      ret typeToString(rawType);

    new StringBuilder stringBuilder;
    stringBuilder.append(typeToString(rawType)).append("<").append(typeToString(typeArguments[0]));
    for (int i = 1; i < length; i++) {
      stringBuilder.append(", ").append(typeToString(typeArguments[i]));
    }
    ret stringBuilder.append(">").toString();
  }
  
  static S typeToString(Type type) {
    return type instanceof Class ? ((Class<?>) type).getName() : type.toString();
  }
}