Belle II Software light-2406-ragdoll
DBImportObjPtr.h
1/**************************************************************************
2 * basf2 (Belle II Analysis Software Framework) *
3 * Author: The Belle II Collaboration *
4 * *
5 * See git log for contributors and copyright holders. *
6 * This file is licensed under LGPL-3.0, see LICENSE.md. *
7 **************************************************************************/
8#pragma once
9
10#include <framework/database/DBImportBase.h>
11#include <stdexcept>
12
13namespace Belle2 {
23 template<class T> class DBImportObjPtr: public DBImportBase {
24 public:
25
31 explicit DBImportObjPtr(const std::string& name = ""):
32 DBImportBase(DBStore::objectName<T>(name))
33 {}
34
39 {
40 if (m_object) delete m_object;
41 }
42
47 template<class ...Args> void construct(Args&& ... params)
48 {
49 if (m_object) delete m_object;
50 m_object = new T(std::forward<Args>(params)...);
51 }
52
56 inline T* operator ->() const
57 {
58 if (!m_object)
59 throw std::out_of_range("DBImportObjPtr::operator ->, for "
60 + getName() + ", "
61 "object does not exist or is invisible");
62 return static_cast<T*>(m_object);
63 }
64
65 };
67}
Base class for importing objects to the database.
Definition: DBImportBase.h:23
const std::string & getName() const
Returns the name under which the object will be stored in the database.
Definition: DBImportBase.h:41
TObject * m_object
pointer to allocated object or array
Definition: DBImportBase.h:100
Class for importing a single object to the database.
DBImportObjPtr(const std::string &name="")
Constructor: the object itself is not allocated here, but in construct(...) function.
T * operator->() const
Imitate pointer functionality.
void construct(Args &&... params)
Construct an object of type T in this DBImportObjPtr using the provided constructor arguments.
~DBImportObjPtr()
Destructor.
Singleton class to cache database objects.
Definition: DBStore.h:31
Abstract base class for different kinds of events.
Definition: ClusterUtils.h:24