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#ifndef DataFormats_Common_HandleExceptionFactory_h
#define DataFormats_Common_HandleExceptionFactory_h
// -*- C++ -*-
//
// Package: DataFormats/Common
// Class : HandleExceptionFactory
//
/**\class edm::HandleExceptionFactory HandleExceptionFactory.h "DataFormats/Common/interface/HandleExceptionFactory.h"
Description: Creates an cms::Exception for an edm::Handle
Usage:
When a data product is requested which is not available, the
edm::Handle<> will hold an edm::HandleExceptionFactory which is
used to manufacture the exception which will be thrown if the Handle
is dereferenced.
Using a factory over having the cms::Exception already in the Handle
is faster for the case where code calls Handle::isValid before
dereferencing.
*/
//
// Original Author: Chris Jones
// Created: Wed, 04 Dec 2013 16:47:12 GMT
//
// system include files
#include <memory>
// user include files
// forward declarations
namespace cms {
class Exception;
}
namespace edm {
class HandleExceptionFactory {
public:
HandleExceptionFactory();
virtual ~HandleExceptionFactory();
// ---------- const member functions ---------------------
virtual std::shared_ptr<cms::Exception> make() const = 0;
private:
//HandleExceptionFactory(const HandleExceptionFactory&); // stop default
//const HandleExceptionFactory& operator=(const HandleExceptionFactory&); // stop default
// ---------- member data --------------------------------
};
} // namespace edm
#endif
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