#ifndef MSP_DATAFILE_COLLECTION_H_
#define MSP_DATAFILE_COLLECTION_H_
+#include <type_traits>
#include <msp/core/attributes.h>
#include <msp/core/maputils.h>
+#include <msp/core/noncopyable.h>
#include <msp/core/refptr.h>
#include "collectionsource.h"
#include "loader.h"
between the collections, and are only deleted when all collections in the chain
have been destroyed.
*/
-class Collection
+class Collection: private NonCopyable
{
public:
/**
private:
typedef std::map<std::string, Variant> ItemMap;
- typedef std::vector<CollectionItemTypeBase *> TypeList;
- typedef std::vector<const CollectionSource *> SourceList;
- TypeList types;
+ std::vector<CollectionItemTypeBase *> types;
ItemMap items;
- SourceList sources;
+ std::vector<const CollectionSource *> sources;
Collection *fallback;
- Collection(const Collection &);
- Collection &operator=(const Collection &);
public:
Collection();
virtual ~Collection();
if(!item)
throw std::invalid_argument("Collection::add(item)");
- RefPtr<typename RemoveConst<T>::Type> ptr(item);
+ typedef typename std::remove_cv<T>::type NCT;
+ RefPtr<NCT> ptr(item);
try
{
- insert_unique(items, name, ptr);
+ add_var(name, get_type<NCT>(name), ptr);
}
catch(...)
{
template<typename T>
T &get(const std::string &name) const
{
- return extract<typename RemoveConst<T>::Type>(get_item(items, name));
+ return extract<typename std::remove_cv<T>::type>(get_item(items, name));
}
/** Gets a typed object from the collection. If the name is not found,
template<typename T>
T &get(const std::string &name)
{
- typedef typename RemoveConst<T>::Type NCT;
+ typedef typename std::remove_cv<T>::type NCT;
return extract<NCT>(get_var(name, get_type<NCT>(name)));
}
+ /** Finds a typed object in the collection. Returns null if the name does
+ not exist. Throws if the name exists but the object is of an incorrect
+ type. */
+ template<typename T>
+ T *find(const std::string &name) const
+ {
+ ItemMap::const_iterator i = items.find(name);
+ return (i!=items.end() ? extract<typename std::remove_cv<T>::type>(i->second) : 0);
+ }
+
+ template<typename T>
+ T *find(const std::string &name)
+ {
+ typedef typename std::remove_cv<T>::type NCT;
+ const Variant *var = find_var(name, get_type<NCT>(name));
+ return (var ? &extract<NCT>(*var) : 0);
+ }
+
private:
+ void add_var(const std::string &, const CollectionItemTypeBase *, const Variant &);
const Variant &get_var(const std::string &, const CollectionItemTypeBase *);
+ const Variant *find_var(const std::string &, const CollectionItemTypeBase *);
template<typename T>
T &extract(const Variant &var) const;
std::list<T *> extract_list(const std::vector<const Variant *> &vars) const
{
std::list<T *> result;
- for(std::vector<const Variant *>::const_iterator i=vars.begin(); i!=vars.end(); ++i)
- result.push_back(&extract<T>(**i));
+ for(const Variant *v: vars)
+ result.push_back(&extract<T>(*v));
return result;
}
std::list<std::string> get_names() const
{
std::list<std::string> names;
- gather_items<typename RemoveConst<T>::Type>(0, &names, 0, false);
+ gather_items<typename std::remove_cv<T>::type>(0, &names, 0, false);
return names;
}
std::list<std::string> get_names()
{
std::list<std::string> names;
- gather_items<typename RemoveConst<T>::Type>(0, &names, 0, true);
+ gather_items<typename std::remove_cv<T>::type>(0, &names, 0, true);
return names;
}
std::list<T *> get_list() const
{
std::vector<const Variant *> vars;
- gather_items<typename RemoveConst<T>::Type>(&vars, 0, 0, false);
+ gather_items<typename std::remove_cv<T>::type>(&vars, 0, 0, false);
return extract_list<T>(vars);
}
template<typename T>
std::list<T *> get_list()
{
- CollectionItemTypeBase *type = get_type<typename RemoveConst<T>::Type>();
+ CollectionItemTypeBase *type = get_type<typename std::remove_cv<T>::type>();
if(type)
load_items_from_sources(*type);
std::vector<const Variant *> vars;
- gather_items<typename RemoveConst<T>::Type>(&vars, 0, type, true);
+ gather_items<typename std::remove_cv<T>::type>(&vars, 0, type, true);
return extract_list<T>(vars);
}
/// Checks whether a typed object exists in the collection.
template<typename T>
bool contains(const std::string &name) const
- { return get_status<typename RemoveConst<T>::Type>(name)==1; }
+ { return get_status<typename std::remove_cv<T>::type>(name)==1; }
/** Checks whether a typed object exists in the collection or is loadable
from a source. */
template<typename T>
bool contains(const std::string &name)
- { return get_status<typename RemoveConst<T>::Type>(name)>0; }
+ { return get_status<typename std::remove_cv<T>::type>(name)>0; }
/// Returns the name of an item in the collection.
template<typename T>
const std::string &get_name(T *d) const
{
- typedef RefPtr<typename RemoveConst<T>::Type> RPNCT;
+ typedef RefPtr<typename std::remove_cv<T>::type> RPNCT;
- for(ItemMap::const_iterator i=items.begin(); i!=items.end(); ++i)
- if(i->second.check_type<RPNCT>())
- if(i->second.value<RPNCT>().get()==d)
- return i->first;
+ for(const auto &kvp: items)
+ if(kvp.second.check_type<RPNCT>())
+ if(kvp.second.value<RPNCT>().get()==d)
+ return kvp.first;
// XXX Need better exception class
throw std::runtime_error("Item not found in collection");
object when done with it. */
IO::Seekable *open_raw(const std::string &) const;
-protected:
- // Deprecated. Use open_raw instead.
- DEPRECATED IO::Seekable *open_from_sources(const std::string &n) { return open_raw(n); }
-
private:
void gather_names_from_sources(std::list<std::string> &, const CollectionItemTypeBase &) const;
virtual bool can_create() const = 0;
virtual void create_item(Collection &, const std::string &) const = 0;
virtual void load_item(Collection &, Parser &, const std::string &) const = 0;
+ virtual void notify_item(Collection &, const std::string &, const Variant &) const = 0;
template<typename T>
bool can_extract() const
{
- for(std::vector<ExtractorBase *>::const_iterator i=extractors.begin(); i!=extractors.end(); ++i)
- if(dynamic_cast<Extractor<T> *>(*i))
+ for(ExtractorBase *e: extractors)
+ if(dynamic_cast<Extractor<T> *>(e))
return true;
return false;
}
template<typename T>
T *extract(const Variant &var) const
{
- for(std::vector<ExtractorBase *>::const_iterator i=extractors.begin(); i!=extractors.end(); ++i)
- if(Extractor<T> *ex = dynamic_cast<Extractor<T> *>(*i))
+ for(ExtractorBase *e: extractors)
+ if(Extractor<T> *ex = dynamic_cast<Extractor<T> *>(e))
return &ex->extract(var);
return 0;
}
{ return (dynamic_cast<C &>(coll).*func)(name); }
};
+ struct NotifyeeBase
+ {
+ virtual ~NotifyeeBase() { }
+
+ virtual void notify(Collection &, const std::string &, T &) const = 0;
+ };
+
+ template<typename C>
+ struct Notifyee: NotifyeeBase
+ {
+ typedef void (C::*FuncPtr)(const std::string &, T &);
+
+ FuncPtr func;
+
+ Notifyee(FuncPtr f): func(f) { }
+
+ virtual void notify(Collection &coll, const std::string &name, T &item) const
+ { (dynamic_cast<C &>(coll).*func)(name, item); }
+ };
+
template<typename B>
struct Extractor: CollectionItemTypeBase::Extractor<B>
{
};
CreatorBase *creat;
+ std::vector<NotifyeeBase *> notif;
public:
CollectionItemType():
~CollectionItemType()
{
delete creat;
+ for(NotifyeeBase *n: notif)
+ delete n;
}
/** Sets a datafile keyword for this item type. The Collection's loader
return *this;
}
+ template<typename C>
+ CollectionItemType ¬ify(void (C::*func)(const std::string &, T &))
+ {
+ notif.push_back(new Notifyee<C>(func));
+ return *this;
+ }
+
virtual bool is_same_type(const CollectionItemTypeBase &other) const
{ return dynamic_cast<const CollectionItemType<T> *>(&other); }
{
throw std::runtime_error("this type cannot be loaded");
}
+
+ virtual void notify_item(Collection &coll, const std::string &name, const Variant &var) const
+ {
+ RefPtr<T> obj = var.value<RefPtr<T> >();
+ for(NotifyeeBase *n: notif)
+ n->notify(coll, name, *obj);
+ }
};
template<typename T>
typename CollectionItemTypeChooser<T>::Type &Collection::modify_type()
{
- for(TypeList::const_iterator j=types.begin(); j!=types.end(); ++j)
- if(CollectionItemType<T> *t = dynamic_cast<CollectionItemType<T> *>(*j))
- return *t;
+ for(CollectionItemTypeBase *t: types)
+ if(CollectionItemType<T> *tt = dynamic_cast<CollectionItemType<T> *>(t))
+ return *tt;
throw std::logic_error("type not found in collection");
}
template<typename T>
CollectionItemTypeBase *Collection::get_type(const std::string &name) const
{
- for(TypeList::const_iterator j=types.begin(); j!=types.end(); ++j)
- if(dynamic_cast<CollectionItemType<T> *>(*j))
- return *j;
+ for(CollectionItemTypeBase *t: types)
+ if(dynamic_cast<CollectionItemType<T> *>(t))
+ return t;
CollectionItemTypeBase *type = 0;
- for(TypeList::const_iterator j=types.begin(); j!=types.end(); ++j)
- if((*j)->can_extract<T>())
+ for(CollectionItemTypeBase *t: types)
+ if(t->can_extract<T>())
{
- if(!name.empty() && (*j)->match_name(name))
- return *j;
- type = *j;
+ if(!name.empty() && t->match_name(name))
+ return t;
+ type = t;
}
return type;
}
projects / libs / datafile.git / blobdiff