#define LIBDCP_REF_H
#include "exceptions.h"
-#include "object.h"
+#include "asset.h"
#include "util.h"
#include <boost/shared_ptr.hpp>
#include <string>
namespace dcp {
/** @class Ref
- * @brief A reference to an object which is identified by a universally-unique identifier (UUID).
+ * @brief A reference to an asset which is identified by a universally-unique identifier (UUID).
*
* This class is a `pointer' to a thing. It will always know the
* UUID of the thing, and it may have a shared_ptr to the C++ object
* which represents the thing.
*
* If the Ref does not have a shared_ptr it may be given one by
- * calling resolve() with a list of objects. The shared_ptr will be
+ * calling resolve() with a list of assets. The shared_ptr will be
* set up using any object on the list which has a matching ID.
*/
-template<class T>
class Ref
{
public:
: _id (id)
{}
- /** Initialise a Ref with a shared_ptr to an object */
- Ref (boost::shared_ptr<T> object)
- : _id (object->id ())
- , _object (object)
+ /** Initialise a Ref with a shared_ptr to an asset */
+ Ref (boost::shared_ptr<Asset> asset)
+ : _id (asset->id ())
+ , _asset (asset)
{}
/** Set the ID of this Ref */
_id = id;
}
- /** Look through a list of objects and copy a shared_ptr to any object
- * which matches the ID of this one.
- */
- void resolve (std::list<boost::shared_ptr<Object> > objects)
- {
- typename std::list<boost::shared_ptr<Object> >::iterator i = objects.begin();
- while (i != objects.end() && !ids_equal ((*i)->id(), _id)) {
- ++i;
- }
-
- if (i != objects.end ()) {
- _object = boost::dynamic_pointer_cast<T> (*i);
- }
- }
+ void resolve (std::list<boost::shared_ptr<Asset> > assets);
/** @return the ID of the thing that we are pointing to */
std::string id () const {
/** @return a shared_ptr to the thing; an UnresolvedRefError is thrown
* if the shared_ptr is not known.
*/
- boost::shared_ptr<T> object () const {
- if (!_object) {
+ boost::shared_ptr<Asset> asset () const {
+ if (!_asset) {
throw UnresolvedRefError (_id);
}
- return _object;
+ return _asset;
}
/** operator-> to access the shared_ptr; an UnresolvedRefError is thrown
* if the shared_ptr is not known.
*/
- T * operator->() const {
- if (!_object) {
+ Asset * operator->() const {
+ if (!_asset) {
throw UnresolvedRefError (_id);
}
- return _object.get ();
+ return _asset.get ();
}
/** @return true if a shared_ptr is known for this Ref */
bool resolved () const {
- return _object;
+ return static_cast<bool>(_asset);
}
private:
- std::string _id; ///< ID; will always be known
- boost::shared_ptr<T> _object; ///< shared_ptr to the thing, may be null.
+ std::string _id; ///< ID; will always be known
+ boost::shared_ptr<Asset> _asset; ///< shared_ptr to the thing, may be null.
};
}