47 |
|
*/ |
48 |
|
class SnapshotManager { |
49 |
|
public: |
50 |
< |
|
50 |
> |
SnapshotManager() : currentSnapshot_(NULL), previousSnapshot_(NULL) { |
51 |
> |
} |
52 |
> |
virtual ~SnapshotManager(); |
53 |
|
virtual bool advance() = 0; |
54 |
|
|
55 |
< |
Snapshot* getSnapshot(int id); |
54 |
< |
|
55 |
< |
Snapshot* getPrevSnapshot(); |
55 |
> |
virtual Snapshot* getSnapshot(int id) = 0; |
56 |
|
|
57 |
< |
void setCurrentSnapshot(); |
58 |
< |
|
59 |
< |
Snapshot* getCurrentSnapshot(); |
57 |
> |
/** |
58 |
> |
* Returns the pointer of previous snapshot |
59 |
> |
* @return the pointer of previous snapshot |
60 |
> |
*/ |
61 |
> |
Snapshot* getPrevSnapshot() { |
62 |
> |
return previousSnapshot_; |
63 |
> |
} |
64 |
|
|
65 |
< |
void setCurrentSnapshot(); |
65 |
> |
/** |
66 |
> |
* Returns the pointer of current snapshot |
67 |
> |
* @return the pointer of current snapshot |
68 |
> |
*/ |
69 |
> |
Snapshot* getCurrentSnapshot() { |
70 |
> |
return currentSnapshot_; |
71 |
> |
} |
72 |
|
|
73 |
|
int getCapacity(); |
74 |
|
|
75 |
< |
void setCapacity(); |
75 |
> |
virtual void setCapacity(int capacity); |
76 |
|
|
77 |
< |
void getNotifyStatus(); |
77 |
> |
bool getNotifyStatus(); |
78 |
|
|
79 |
< |
void setNotifyStatus(); |
79 |
> |
void setNotifyStatus(bool status); |
80 |
|
|
81 |
|
void attach(SnapshotObserver*); |
82 |
|
|
83 |
|
void detach(SnapshotObserver*); |
84 |
|
|
85 |
|
void notify(); |
86 |
+ |
|
87 |
+ |
protected: |
88 |
+ |
Snapshot* currentSnapshot_; |
89 |
+ |
Snapshot* previousSnapshot_; |
90 |
|
|
91 |
|
private: |
78 |
– |
vector<Snapshot*> snapshots_; |
92 |
|
vector<SnapshotObserver*> observers_; |
93 |
+ |
|
94 |
|
}; |
95 |
|
|
96 |
|
} |