Cosmetic changes

[libs/datafile.git] / source / collection.cpp

diff --git a/source/collection.cpp b/source/collection.cpp
index a16ae5a9dc2e7a9f70f638093348b59c8bd561eb..e1c25ddc914e6afd0f2be1b8e4ef198846c5c209 100644 (file)
--- a/source/collection.cpp
+++ b/source/collection.cpp
@@ -1,3 +1,5 @@
+#include <set>
+#include <msp/core/algorithm.h>
 #include "collection.h"
 
 using namespace std;
@@ -7,42 +9,170 @@ namespace DataFile {
 
 Collection::~Collection()
 {
-       for(TypeList::iterator i = types.begin(); i!=types.end(); ++i)
-               delete *i;
+       for(CollectionItemTypeBase *t: types)
+               delete t;
 }
 
-void Collection::add_future(const std::string &name)
+void Collection::add_var(const string &name, const CollectionItemTypeBase *type, const Variant &var)
 {
-       if(items.count(name))
-               throw key_error(typeid(ItemMap));
+       insert_unique(items, name, var);
+       try
+       {
+               if(type)
+                       type->notify_item(name, var);
+       }
+       catch(...)
+       {
+               remove_existing(items, name);
+               throw;
+       }
+}
+
+const Variant &Collection::get_var(const string &name, const CollectionItemTypeBase *type)
+{
+       const Variant *var = find_var(name, type);
+       if(var)
+               return *var;
 
-       for(TypeList::const_iterator i=types.begin(); i!=types.end(); ++i)
-               if((*i)->match_name(name))
+       throw key_error(name);
+}
+
+const Variant *Collection::find_var(const string &name, const CollectionItemTypeBase *type)
+{
+       ItemMap::iterator i = items.find(name);
+       if(i!=items.end())
+               return &i->second;
+
+       if(type)
+       {
+               bool loaded = false;
+               if(type->can_create())
+               {
+                       type->create_item(*this, name);
+                       loaded = items.count(name);
+               }
+               for(auto j=sources.begin(); (!loaded && j!=sources.end()); ++j)
                {
-                       items.insert(ItemMap::value_type(name, (*i)->create_future()));
-                       return;
+                       (*j)->load(*this, *type, name);
+                       loaded = items.count(name);
                }
+               if(!loaded && fallback)
+                       if(CollectionItemTypeBase *fb_type = fallback->get_type(*type))
+                               if(fallback->get_status(name, *fb_type))
+                                       return fallback->find_var(name, fb_type);
+       }
+
+       i = items.find(name);
+       return (i!=items.end() ? &i->second : nullptr);
+}
+
+void Collection::gather_items(vector<const Variant *> *vars, list<string> *names, const CollectionItemTypeBase &type, bool include_sources) const
+{
+       for(const auto &kvp: items)
+               if(type.check_item_type(kvp.second))
+               {
+                       if(vars)
+                               vars->push_back(&kvp.second);
+                       if(names)
+                               names->push_back(kvp.first);
+               }
+
+       if(include_sources && names)
+               gather_names_from_sources(*names, type);
+}
+
+unsigned Collection::get_status(const string &name, const CollectionItemTypeBase &type) const
+{
+       ItemMap::const_iterator i = items.find(name);
+       if(i==items.end())
+       {
+               auto j = find_if(sources, [&name, &type](const CollectionSource *s){ return s->is_loadable(type, name); });
+               if(j!=sources.end())
+                       return 2;
+               if(fallback)
+                       if(CollectionItemTypeBase *fb_type = fallback->get_type(type))
+                               return fallback->get_status(name, *fb_type);
+               return 0;
+       }
+
+       return type.check_item_type(i->second);
+}
 
-       /* XXX throw something?  If we do, DirectoryCollection needs some way to
-       check if a name matches any item type. */
+CollectionItemTypeBase *Collection::get_type(const CollectionItemTypeBase &type) const
+{
+       for(CollectionItemTypeBase *t: types)
+               if(t->is_same_type(type))
+                       return t;
+       return nullptr;
+}
+
+CollectionItemTypeBase *Collection::get_type_for_item(const Variant &var) const
+{
+       for(CollectionItemTypeBase *t: types)
+               if(t->check_item_type(var))
+                       return t;
+       return nullptr;
+}
+
+void Collection::add_source(const CollectionSource &s)
+{
+       sources.push_back(&s);
+}
+
+IO::Seekable *Collection::open_raw(const string &name) const
+{
+       for(const CollectionSource *s: sources)
+               if(IO::Seekable *io = s->open(name))
+                       return io;
+
+       return nullptr;
+}
+
+void Collection::gather_names_from_sources(list<string> &names, const CollectionItemTypeBase &type) const
+{
+       set<string> new_names;
+       for(const CollectionSource *s: sources)
+               for(const string &n: s->get_names(type))
+                       if(!items.count(n))
+                               new_names.insert(n);
+       names.insert(names.end(), new_names.begin(), new_names.end());
+}
+
+void Collection::load_items_from_sources(const CollectionItemTypeBase &type)
+{
+       for(const CollectionSource *s: sources)
+               for(const string &n: s->get_names(type))
+                       if(!items.count(n))
+                       {
+                               bool loaded = false;
+                               if(type.can_create())
+                               {
+                                       type.create_item(*this, n);
+                                       loaded = items.count(n);
+                               }
+                               if(!loaded)
+                                       s->load(*this, type, n);
+                       }
+}
+
+void Collection::set_fallback(Collection *f)
+{
+       fallback = f;
 }
 
 
 Collection::Loader::Loader(Collection &c):
        coll(c)
 {      
-       for(TypeList::const_iterator i = coll.types.begin(); i!=coll.types.end(); ++i)
-               (*i)->add_to_loader(*this);
+       for(const CollectionItemTypeBase *t: coll.types)
+               t->add_to_loader(*this);
 }
 
 
-CollectionItemTypeBase::CollectionItemTypeBase():
-       tag(0)
-{ }
-
 CollectionItemTypeBase::~CollectionItemTypeBase()
 {
-       delete tag;
+       for(ExtractorBase *e: extractors)
+               delete e;
 }
 
 void CollectionItemTypeBase::set_keyword(const string &k)
@@ -59,8 +189,8 @@ void CollectionItemTypeBase::add_suffix(const string &s)
 
 bool CollectionItemTypeBase::match_name(const string &name) const
 {
-       for(vector<string>::const_iterator i=suffixes.begin(); i!=suffixes.end(); ++i)
-               if(name.size()>i->size() && !name.compare(name.size()-i->size(), string::npos, *i))
+       for(const string &s: suffixes)
+               if(name.size()>s.size() && !name.compare(name.size()-s.size(), string::npos, s))
                        return true;
        return false;
 }