| class CStoreMap : public CBase |
Store map used when externalising swizzled in-memory objects.
It has three main characteristics:
it acts as an in-memory repository of stream ids and associated swizzles
it acts as an externaliser for swizzles
it offers cleanup support
| Public Member Functions | |
|---|---|
| CStoreMap(CStreamStore &) | |
| ~CStoreMap() | |
| IMPORT_C TStreamId | At(TSwizzleC< TAny >) |
| IMPORT_C TIterator | Begin() |
| IMPORT_C void | BindL(TSwizzleC< TAny >, TStreamId) |
| IMPORT_C TIterator | End() |
| IMPORT_C void | Forget(TStreamId) |
| IMPORT_C TSwizzleC< TAny > | Label(TStreamId) |
| IMPORT_C CStoreMap * | NewL(CStreamStore &) |
| IMPORT_C CStoreMap * | NewLC(CStreamStore &) |
| IMPORT_C void | Reset() |
| IMPORT_C void | ResetAndDestroy() |
| IMPORT_C void | Unbind(TSwizzleC< TAny >) |
| Private Member Functions | |
|---|---|
| void | ExternalizeL(const TStreamRef &, RWriteStream &) |
| Public Member Type Definitions | |
|---|---|
| typedef | const TEntry * TIterator |
| Private Attributes | |
|---|---|
| CArrayFixFlat< TEntry > | iArray |
| TStreamId | iFree |
| CStreamStore * | iStore |
| IMPORT_C | ~CStoreMap | ( | ) |
Frees resources owned by the object, prior to its destruction.
In particular, the destructor deletes all streams whose stream ids are currently held within the store map and then empties the store map.
| IMPORT_C TStreamId | At | ( | TSwizzleC< TAny > | aSwizzle | ) | const |
Returns the stream id of the first entry the store map matching the specified swizzle.
Callers of this function can pass any type of swizzle as the first parameter, i.e. any swizzle derived from TSwizzleCBase. The required TSwizzleC<TAny> object is constructed from the swizzle passed by the caller.
| IMPORT_C void | BindL | ( | TSwizzleC< TAny > | aSwizzle, |
| TStreamId | anId | |||
| ) | ||||
Creates an entry in the store map to contain the specified stream id and an associated swizzle. On return from this function, the stream id is said to be bound to the swizzle.
If the store map already contains an entry with the same swizzle, then the new entry replaces the existing entry; in effect, knowledge of the original stream id associated with aSwizzle, is lost.
Callers of this function can pass any type of swizzle as the first parameter, i.e. any swizzle derived from TSwizzleCBase. The required TSwizzleC<TAny> object is constructed from the swizzle passed by the caller.
Note that in most applications, callers pass a general swizzle, i.e. an object of type TSwizzle<class T>, where T is the type of object represented by that swizzle.
| void | ExternalizeL | ( | const TStreamRef & | aRef, |
| RWriteStream & | aStream | |||
| ) | const [private] | |||
| const TStreamRef & aRef | |
| RWriteStream & aStream |
| IMPORT_C void | Forget | ( | TStreamId | anId | ) |
Deletes an entry from the store map. The entry selected is the first one whose stream id matches the specified stream id.
On return from this function, the stream id is said to be forgotten and knowledge of that stream id is lost.
| TStreamId anId | The stream id used to identify the entry in the store map to be deleted. |
| IMPORT_C TSwizzleC< TAny > | Label | ( | TStreamId | anId | ) | const |
Returns the swizzle in the store map assocated with the specified stream id.
| TStreamId anId | The id of the stream |
| IMPORT_C CStoreMap * | NewL | ( | CStreamStore & | aStore | ) | [static] |
Allocates and constructs a store map associated with the specified store and returns a pointer to that store map.
The function leaves if it cannot complete successfully.
| CStreamStore & aStore | A reference to the store associated with this store map. |
| IMPORT_C CStoreMap * | NewLC | ( | CStreamStore & | aStore | ) | [static] |
Allocates and constructs a store map associated with the specified store, returns a pointer to that store map and puts the pointer onto the cleanup stack.
The function leaves if it cannot complete successfully.
Placing a pointer to this object onto the cleanup stack allows the object and allocated resources to be cleaned up if a subsequent leave occurs.
| CStreamStore & aStore | A reference to the store associated with this store map. |
| IMPORT_C void | Reset | ( | ) |
Deletes all entries from the store map.
It is important that this function is called before deleting the store map, as the destructor attempts to delete all streams whose stream ids are held within the map.
| IMPORT_C void | ResetAndDestroy | ( | ) |
Deletes all streams whose ids are held within the store map, and then empties the store map.
| IMPORT_C void | Unbind | ( | TSwizzleC< TAny > | aSwizzle | ) |
Deletes the first entry from the store map corresponding to the specified swizzle.
On return from this function, the swizzle is said to be unbound and knowledge of the associated stream id is lost.
Callers of this function can pass any type of swizzle as the parameter, i.e. any swizzle derived from TSwizzleCBase. The required TSwizzleC<TAny> object is constructed from the swizzle passed by the caller.
Notes:
In most applications, callers pass a general swizzle, i.e. an object of type TSwizzle<class T>, where T is the type of object represented by that swizzle.
If no matching entry can be found in the store map, then the store map remains unaltered.
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reserved. Unless otherwise stated, these materials are provided under the terms of the Eclipse Public License
v1.0.