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KeyedObject.cpp
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1 // Include files
2 #include "GaudiKernel/Kernel.h"
3 #include "GaudiKernel/IRegistry.h"
4 #include "GaudiKernel/LinkManager.h"
5 #include "GaudiKernel/GaudiException.h"
6 #include "GaudiKernel/IDataProviderSvc.h"
7 #include "GaudiKernel/ObjectContainerBase.h"
8 #include "GaudiKernel/ContainedObject.h"
9
15 namespace Objects {
16 bool access(const ContainedObject* from, ContainedObject** to);
17 bool access(const DataObject* from, DataObject** to);
18
19 template <class TO, class FROM>
20 TO* reference(FROM* from) {
21 ContainedObject* to = nullptr;
22 return access(from, &to) ? dynamic_cast<TO*>(to) : nullptr;
23 }
24 }
25
26 bool Objects::access(const DataObject* from, DataObject** to)
27 {
28 DataObject* src = const_cast<DataObject*>(from);
29 DataObject* tar = nullptr;
30 if ( src ) {
31 LinkManager* mgr = src->linkMgr();
32 if ( mgr ) {
33 LinkManager::Link* link = mgr->link(long(0));
34 if ( link ) {
35 tar = link->object();
36 if ( !tar ) {
37 IRegistry* reg = src->registry();
38 if ( reg ) {
39 IDataProviderSvc* ds = reg->dataSvc();
40 if ( ds && ds->retrieveObject(link->path(), tar).isSuccess() ) {
41 link->setObject(tar);
42 }
43 }
44 }
45 }
46 }
47 }
48 *to = tar;
49 return tar != nullptr;
50 }
51
52 // Load on demand: ContainedObject type references
53 bool Objects::access(const ContainedObject* from, ContainedObject** to)
54 {
55 *to = nullptr;
56 if ( from ) {
57 DataObject *tar = nullptr;
58 if ( access(from->parent(), &tar) ) {
59 ObjectContainerBase* cnt = dynamic_cast<ObjectContainerBase*>(tar);
60 if ( cnt ) {
61 *to = cnt->containedObject(from->index());
62 }
63 }
64 }
65 return *to != nullptr;
66 }
67
Objects
Namespace for basic object handling within container classes.
Definition: KeyedObject.cpp:15
LinkManager::Link::path
const std::string & path() const
Access to path of object.
Definition: LinkManager.h:69
Kernel.h
LinkManager.h
ContainedObject::index
virtual long index() const
Distance in the parent container.
Definition: ContainedObject.h:54
ObjectContainerBase.h
IDataProviderSvc
Data provider interface definition.
Definition: IDataProviderSvc.h:45
ContainedObject::parent
const ObjectContainerBase * parent() const
Access to parent object.
Definition: ContainedObject.h:49
DataObject::registry
IRegistry * registry() const
Get pointer to Registry.
Definition: DataObject.h:74
DataObject::linkMgr
LinkManager * linkMgr() const
Retrieve Link manager.
Definition: DataObject.h:78
ObjectContainerBase::containedObject
virtual ContainedObject * containedObject(long dist) const =0
Pointer to an object of a given distance.
IDataProviderSvc.h
LinkManager::Link::setObject
void setObject(const DataObject *pObject)
Update object pointer.
Definition: LinkManager.h:58
GaudiException.h
LinkManager::link
Link * link(long id)
Retrieve symbolic link identified by ID.
Definition: LinkManager.cpp:33
IRegistry::dataSvc
virtual IDataProviderSvc * dataSvc() const =0
Retrieve pointer to Transient Store.
IRegistry.h
IRegistry
The IRegistry represents the entry door to the environment any data object residing in a transient da...
Definition: IRegistry.h:22
Objects::access
bool access(const ContainedObject *from, ContainedObject **to)
Definition: KeyedObject.cpp:53
ContainedObject
All classes that their objects may be contained in an LHCb ObjectContainer (e.g.
Definition: ContainedObject.h:29
ContainedObject.h
ObjectContainerBase
ObjectContainerBase is the base class for Gaudi container classes.
Definition: ObjectContainerBase.h:19
LinkManager::Link::object
const DataObject * object() const
Const access to data object.
Definition: LinkManager.h:62
LinkManager::Link
Embedded class defining a symbolic link Note: No copy constructor; bitwise copy (done by the compiler...
Definition: LinkManager.h:31
DataObject
A DataObject is the base class of any identifiable object on any data store.
Definition: DataObject.h:30
LinkManager
A LinkManager is the object aggregated into a DataObject, which is responsible for the handling of no...
Definition: LinkManager.h:21
Objects::reference
TO * reference(FROM *from)
Definition: KeyedObject.cpp:20
IDataProviderSvc::retrieveObject
virtual StatusCode retrieveObject(IRegistry *pDirectory, const std::string &path, DataObject *&pObject)=0
Retrieve object identified by its directory entry.