Hello Robert,
it compiles by making m_offlineMode mutable :)
I can live without it by simply putting the bools into the archive
like
ar & true
ar & true
( Someone said this works, didnt try it though)
I can assure you I know what I am doing. I need to alter the state of the
program depending on whether I am using something loaded from disk or not.
Of course, there would be other ways but this seems to be most elegant to me ...
Since I am deserializing the same vars in the same sequence as I am serializing, there
shouldnt be a problem. (Or is there ? The bools I am changing during save() affect the maps in no way ...)
kind regards,
Oliver
I can't imagin how something likem_offlineMode = true;even compiles given that save is a "const" function.If you can't live without this, it suggests that your saving operationis altering the thing its saving - which would conflict with thethe idea that only one copy of anything is actually saved.From looking at this - that's the only think I can ay.Robert Ramey"Oliver Kania" <kania.oliver@googlemail.com> wrote in message news:1262c4ee0711090524w3a2e1a8i3355283c8c65ed98@mail.gmail.com...I have the following two data structures:
std::map<const std::string, boost::shared_ptr< C >, jedox::util::CaseInsensitiv > m_LookupName;
std::map<unsigned int, boost::shared_ptr< C > > m_LookupId;
Before serialization, the shared pointer - values of the maps do point to sth. meaningful.
Afterwards, however, they point to data-structures with meaningless content.
The keys (strings / ints) are serialized / unserialized correctly.
I guess its a general problem with serializing shared pointers contained in a std::map as values !?
BTW: the structures the shared pointers point to do have a serialization method themselves and I a
assume that it is called when serializing the map.
I serialize / unserialize as follows:
template<class Archive>
void save( Archive &ar, unsigned int version) const{
m_offlineMode = true;
bool oldCachedAll = m_CachedAll;
m_CachedAll = true;
ar & m_CachedAll;
ar & m_offlineMode;
// do not serialize the lock -- use the default constructor.
// we assume that no iterators that lock the cache do exist when serializing.
// ar & m_Lock;
ar & m_LookupId; // 1st structure
ar & m_LookupName; // 2nd structure
ar & m_SequenceNumber;
//reset old state for the case we want to continue working
m_CachedAll = oldCachedAll;
m_offlineMode = false;
}
template<class Archive>
void load( Archive &ar, unsigned int version) {
ar & m_CachedAll;
ar & m_offlineMode;
// do not serialize the lock -- use the default constructor.
// we assume that no iterators that lock the cache do exist when serializing.
// ar & m_Lock;
ar & m_LookupId;
ar & m_LookupName;
ar & m_SequenceNumber;
//reset old state for the case we want to continue working
}
kind regards, Oliver
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