首先告訴提振該功能是抽象的,並不總是需要:
BOOST_SERIALIZATION_ASSUME_ABSTRACT(Feature);
序列化方法應該或多或少是這樣的:
template<class Archive>
void Feature::serialize(Archive & ar, const unsigned int version)
{
ar & BOOST_SERIALIZATION_NVP(some_member);
}
template<typename T,class Archive>
void GenericFeature<T>::serialize(Archive & ar, const unsigned int version)
{
ar & boost::serialization::base_object<Feature>(*this); //serialize base class
ar & BOOST_SERIALIZATION_NVP(some_other_member);
}
現在棘手的問題是註冊類在序列化/反序列化:
boost::archive::text_iarchive inputArchive(somesstream);
boost::archive::text_oarchive outputArchive(somesstream);
//something to serialize
Feature* one = new GenericFeature<SomeType1>();
Feature* two = new GenericFeature<SomeType2>();
Feature* three = new GenericFeature<SomeType3>();
//register our class, must be all of posible template specyfication
outputArchive.template register_type< GenericFeature<SomeType1> >();
outputArchive.template register_type< GenericFeature<SomeType2> >();
outputArchive.template register_type< GenericFeature<SomeType3> >();
// now simply serialize ;-]
outputArchive << one << two << three;
// register class in deserialization
// must be the same template specification as in serialize
// and in the same correct order or i'm get it wrong ;-D
inputArchive.template register_type< GenericFeature<SomeType1> >();
inputArchive.template register_type< GenericFeature<SomeType2> >();
inputArchive.template register_type< GenericFeature<SomeType3> >();
Feature* another_one;
Feature* another_two;
Feature* another_three;
// and deserialize ;-]
inputArchive >> another_one >> another_two >> another_three;
如果你需要隱藏明確登記somewh並且使它更加自動化,有一種想法是製作特殊的函子模板,它註冊一個派生類,創建所有可用類並放入一個列表中,Feature類的一個靜態方法將它們全部註冊。然而問題是你需要註冊所有版本的檔案,現在我不知道多態檔案是否能夠完成這項工作。
我認爲第一個代碼框的第11行有一個錯誤。如果我沒有弄錯,你應該在「boost :: serialization :: base_object」的左邊有「ar&」。雖然很好的答案! – 2010-11-18 01:21:18
@lionbest:你不應該使用'BOOST_SERIALIZATION_BASE_OBJECT_NVP'而不是'boost :: serialization :: base_object(* this);' –
Cookie
2011-08-22 10:23:08
我想你可能想要指定名稱,如果你有多個基類。我不認爲這個宏需要在這裏,但確定你可能想要一個。 – Arpegius 2011-08-23 09:30:53