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libs-gdl2/EOAccess/EODatabaseContext.h
Mirko Viviani bf5ba60b07 *** empty log message *** 
git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gdl2/trunk@14993 72102866-910b-0410-8b05-ffd578937521
2002-11-15 22:57:05 +00:00

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/*
EODatabaseContext.h
Copyright (C) 2000 Free Software Foundation, Inc.
Author: Mirko Viviani <mirko.viviani@rccr.cremona.it>
Date: July 2000
This file is part of the GNUstep Database Library.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; see the file COPYING.LIB.
If not, write to the Free Software Foundation,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef __EODatabaseContext_h__
#define __EODatabaseContext_h__
#import <EOControl/EOControl.h>
@class EOAdaptorContext;
@class EOAdaptorChannel;
@class EOAdaptorOperation;
@class EOEntity;
@class EOModel;
@class EORelationship;
@class EOAttribute;
@class EODatabase;
@class EODatabaseChannel;
@class EODatabaseOperation;
typedef enum {
EOUpdateWithOptimisticLocking,
EOUpdateWithPessimisticLocking,
EOUpdateWithNoLocking
} EOUpdateStrategy;
struct _EOTransactionScope;
@interface EODatabaseContext : EOCooperatingObjectStore
{
EODatabase *_database;
EOAdaptorContext *_adaptorContext;
EOUpdateStrategy _updateStrategy;
/*TOADD
NSMutableArray *_uniqueStack;
NSMutableArray *_deleteStack;
NSMutableArray *_modifiedObjects;
*/
NSMutableArray *_registeredChannels;
NSMapTable *_dbOperationsByGlobalID;
EOObjectStoreCoordinator *_coordinator; // not retained
EOEditingContext *_editingContext; // not retained
id *_lockedObjects;//void*
/*TO ADD unsigned int _currentGeneration;
unsigned int _concurentFetches;
*/
unsigned int _numLocked;//TO REMOVE
NSMutableDictionary *_batchFaultBuffer;
NSMutableDictionary *_batchToManyFaultBuffer;
// NSMutableDictionary *_snapshots;
// NSMutableDictionary *_toManySnapshots;
EOEntity* _lastEntity;
/*TOADD
EOGlobalID *_currentGlobalID;
NSDictionary *_currentSnapshot;
objc_object *_currentBatch;
*/
NSMutableArray *_uniqueStack;// snaps
NSMutableArray *_uniqueArrayStack;//to many snaps
NSMutableArray *_deleteStack;
NSHashTable *_nonPrimaryKeyGenerators;
struct {
unsigned int preparingForSave:1;
unsigned int beganTransaction:1;
unsigned int ignoreEntityCaching:1;
unsigned int _reserved:29;
} _flags;
id _delegate; // not retained
struct {
unsigned int willRunLoginPanelToOpenDatabaseChannel:1;
unsigned int newPrimaryKey:1;
unsigned int willPerformAdaptorOperations:1;
unsigned int shouldInvalidateObject:1;
unsigned int willOrderAdaptorOperations:1;
unsigned int shouldLockObject:1;
unsigned int shouldRaiseForLockFailure:1;
unsigned int shouldFetchObjects:1;
unsigned int didFetchObjects:1;
unsigned int shouldFetchObjectFault:1;
unsigned int shouldFetchArrayFault:1;
unsigned int _reserved:21;
} _delegateRespondsTo;
NSRecursiveLock *_lock; //TODO: not lock object !
}
+ (EODatabaseContext *)databaseContextWithDatabase: (EODatabase *)database;
- initWithDatabase: (EODatabase *)database;
+ (EODatabaseContext *)registeredDatabaseContextForModel: (EOModel *)model
editingContext: (EOEditingContext *)editingContext;
+ (Class)contextClassToRegister;
+ (void)setContextClassToRegister: (Class)contextClass;
- (BOOL)hasBusyChannels;
- (NSArray *)registeredChannels;
- (void)registerChannel: (EODatabaseChannel *)channel;
- (void)unregisterChannel: (EODatabaseChannel *)channel;
- (EODatabaseChannel *)_availableChannelFromRegisteredChannels;
- (EODatabaseChannel *)availableChannel;
- (EODatabase *)database;
- (EOObjectStoreCoordinator *)coordinator;
- (EOAdaptorContext *)adaptorContext;
- (void)setUpdateStrategy: (EOUpdateStrategy)strategy;
- (EOUpdateStrategy)updateStrategy;
- (id)delegate;
- (void)setDelegate: (id)delegate;
- (void)handleDroppedConnection;
@end /* EODatabaseContext */
@interface EODatabaseContext(EOObjectStoreSupport)
- (id)faultForRawRow: (NSDictionary *)row
entityNamed: (NSString *)entityName
editingContext: (EOEditingContext *)editingContext;
- (id)faultForGlobalID: (EOGlobalID *)globalID
editingContext: (EOEditingContext *)context;
- (NSArray *)arrayFaultWithSourceGlobalID: (EOGlobalID *)globalID
relationshipName: (NSString *)name
editingContext: (EOEditingContext *)context;
- (void)initializeObject: (id)object
withGlobalID: (EOGlobalID *)globalID
editingContext: (EOEditingContext *)context;
- (NSArray *)objectsForSourceGlobalID: (EOGlobalID *)globalID
relationshipName: (NSString *)name
editingContext: (EOEditingContext *)context;
- (void)_registerSnapshot: (NSArray*)snapshot
forSourceGlobalID: (EOGlobalID*)globalID
relationshipName: (NSString*)name
editingContext: (EOEditingContext*)context;
- (void)refaultObject: object
withGlobalID: (EOGlobalID *)globalID
editingContext: (EOEditingContext *)context;
- (void)saveChangesInEditingContext: (EOEditingContext *)context;
- (NSArray *)objectsWithFetchSpecification: (EOFetchSpecification *)fetchSpecification
editingContext:(EOEditingContext *)context;
- (BOOL)isObjectLockedWithGlobalID: (EOGlobalID *)gid
editingContext: (EOEditingContext *)context;
- (void)lockObjectWithGlobalID: (EOGlobalID *)gid
editingContext: (EOEditingContext *)context;
- (void)invalidateAllObjects;
- (void)invalidateObjectsWithGlobalIDs: (NSArray *)globalIDs;
@end
@interface EODatabaseContext(EOCooperatingObjectStoreSupport)
- (BOOL)ownsGlobalID:(EOGlobalID *)globalID;
- (BOOL)ownsObject: (id)object;
- (BOOL)ownsEntityNamed: (NSString *)entityName;
- (BOOL)handlesFetchSpecification: (EOFetchSpecification *)fetchSpecification;
- (void)prepareForSaveWithCoordinator: (EOObjectStoreCoordinator *)coordinator
editingContext: (EOEditingContext *)context;
/** The method overrides the inherited implementation to create a list of EODatabaseOperations for EOEditingContext objects changes (only objects owned by the receiver).
It forwards any relationship changes found which are not owned by the receiver to the EOObjectStoreCoordinator.
It's invoked during EOObjectStoreCoordinator saving changes (saveChangesInEditingContext:) method.
It's invoked after prepareForSaveWithCoordinator:editingContext: and before ownsGlobalID:.
**/
- (void)recordChangesInEditingContext;
- (void)recordUpdateForObject: object
changes: (NSDictionary *)changes;
- (void)performChanges;
- (void)commitChanges;
- (void)rollbackChanges;
- (NSDictionary *)valuesForKeys: (NSArray *)keys object: object;
-(void)relayPrimaryKey: (NSDictionary*)pk
object: (id)object
entity: (EOEntity*)entity;
-(void)nullifyAttributesInRelationship: (EORelationship*)relationship
sourceObject: (id)sourceObject
destinationObjects: (NSArray*)destinationObjects;
-(void)nullifyAttributesInRelationship: (EORelationship*)relationship
sourceObject: (id)sourceObject
destinationObject: (id)destinationObject;
-(void)relayAttributesInRelationship: (EORelationship*)relationship
sourceObject: (id)sourceObject
destinationObjects: (NSArray*)destinationObjects;
-(NSDictionary*)relayAttributesInRelationship: (EORelationship*)relationship
sourceObject: (id)sourceObject
destinationObject: (id)destinationObject;
- (id) databaseOperationForObject: (id)param0;
- (id) databaseOperationForGlobalID: (id)param0;
- (void) recordDatabaseOperation: (id)param0;
- (void) recordDeleteForObject: (id)param0;
- (void) recordInsertForObject: (id)param0;
- (void) createAdaptorOperationsForDatabaseOperation: (EODatabaseOperation*)dbOpe
attributes: (NSArray*)attributes;
- (void) createAdaptorOperationsForDatabaseOperation: (EODatabaseOperation*)dbOpe;
- (NSArray*) orderAdaptorOperations;
- (id) entitiesOnWhichThisEntityDepends: (EOEntity *)entity;
-(NSArray*)entityNameOrderingArrayForEntities: (NSArray *)entities;
- (BOOL) isValidQualifierTypeForAttribute: (EOAttribute*)attribute;
- (id) lockingNonQualifiableAttributes: (NSArray*)attributes;
- (NSArray*) lockingAttributesForAttributes: (NSArray*)attributes
entity: (EOEntity*)enity;
- (NSArray*) primaryKeyAttributesForAttributes: (NSArray*)attributes
entity: (EOEntity*)entity;
- (EOQualifier*) qualifierForLockingAttributes: (NSArray*)attributes
primaryKeyAttributes: (NSArray*)primaryKeyAttributes
entity: (EOEntity*)entity
snapshot: (NSDictionary*)snapshot;
- (void) insertEntity: (EOEntity*)entity
intoOrderingArray: (NSMutableArray*)orderingArray
withDependencies: (NSDictionary*)dependencies
processingSet: (NSMutableSet*)processingSet;
- (void) processSnapshotForDatabaseOperation: (EODatabaseOperation*)dbOpe;
- (NSDictionary*) valuesToWriteForAttributes: (NSArray*)attributes
entity: (EOEntity*)entity
changedValues: (NSDictionary*)changedValues;
@end
@interface EODatabaseContext(EOBatchFaulting)
- (void)batchFetchRelationship: (EORelationship *)relationship
forSourceObjects: (NSArray *)objects
editingContext: (EOEditingContext *)editingContext;
@end
@interface EODatabaseContext (EODatabaseSnapshotting)
- (void)recordSnapshot: (NSDictionary *)snapshot
forGlobalID: (EOGlobalID *)gid;
/** Returns snapshot for globalID. (nil if there's no snapshot for the globalID or if the corresponding
tsimestamp is less than ti).
Searches first locally (in the transaction scope) and after in the EODatabase. **/
- (NSDictionary *)snapshotForGlobalID: (EOGlobalID *)gid
after: (NSTimeInterval)ti;
/** Returns snapshot for globalID by calling snapshotForGlobalID:after: with EODistantPastTimeInterval
as time interval.
Searches first locally (in the transaction scope) and after in the EODatabase. **/
- (NSDictionary *)snapshotForGlobalID: (EOGlobalID *)gid;
- (void)recordSnapshot: (NSArray *)gids
forSourceGlobalID: (EOGlobalID *)gid
relationshipName: (NSString *)name;
- (NSArray *)snapshotForSourceGlobalID: (EOGlobalID *)gid
relationshipName: (NSString *)name;
/** Returns the snapshot for the globalID (nil if there's none).
Only searches locally (in the transaction scope), not in the EODatabase. **/
- (NSDictionary *)localSnapshotForGlobalID: (EOGlobalID *)gid;
- (NSArray *)localSnapshotForSourceGlobalID: (EOGlobalID *)gid
relationshipName:(NSString *)name;
- (void)forgetSnapshotForGlobalID: (EOGlobalID *)gid;
- (void)forgetSnapshotsForGlobalIDs: (NSArray *)gids;
- (void)recordSnapshots: (NSDictionary *)snapshots;
- (void)recordToManySnapshots: (NSDictionary *)snapshots;
- (void)registerLockedObjectWithGlobalID: (EOGlobalID *)globalID;
- (BOOL)isObjectLockedWithGlobalID: (EOGlobalID *)globalID;
- (void)forgetAllLocks;
- (void)forgetLocksForObjectsWithGlobalIDs: (NSArray *)gids;
- (void) _rollbackTransaction;
- (void) _commitTransaction;
- (void) _beginTransaction;
- (EODatabaseChannel*) _obtainOpenChannel;
- (BOOL) _openChannelWithLoginPanel:(id)param0;
- (void) _forceDisconnect;
- (void)initializeObject:(id)object
row:(NSDictionary*)row
entity:(EOEntity*)entity
editingContext:(EOEditingContext*)context;
@end
@interface EODatabaseContext(EOMultiThreaded) <NSLocking>
- (void)lock;
- (void)unlock;
@end
// Notifications:
extern NSString *EODatabaseChannelNeededNotification;
@interface NSObject (EODatabaseContextDelegation)
- (BOOL)databaseContext: (EODatabaseContext *)context
willRunLoginPanelToOpenDatabaseChannel: (EODatabaseChannel *)channel;
- (NSDictionary *)databaseContext: (EODatabaseContext *)context
newPrimaryKeyForObject: (id)object
entity: (EOEntity *)entity;
- (BOOL)databaseContext: (EODatabaseContext *)context
failedToFetchObject: (id)object
globalID: (EOGlobalID *)gid;
- (NSArray *)databaseContext: (EODatabaseContext *)context
willOrderAdaptorOperationsFromDatabaseOperations: (NSArray *)databaseOps;
- (NSArray *)databaseContext: (EODatabaseContext *)context
willPerformAdaptorOperations: (NSArray *)adaptorOps
adaptorChannel: (EOAdaptorChannel *)adaptorChannel;
- (BOOL)databaseContext: (EODatabaseContext *)context
shouldInvalidateObjectWithGlobalID: (EOGlobalID *)globalId
snapshot: (NSDictionary *)snapshot;
- (NSArray *)databaseContext: (EODatabaseContext *)context
shouldFetchObjectsWithFetchSpecification: (EOFetchSpecification *)fetchSpecification
editingContext: (EOEditingContext *)editingContext;
- (void)databaseContext: (EODatabaseContext *)context
didFetchObjects: (NSArray *)objects
fetchSpecification: (EOFetchSpecification *)fetchSpecification
editingContext: (EOEditingContext *)editingContext;
- (BOOL)databaseContext: (EODatabaseContext *)context
shouldSelectObjectsWithFetchSpecification: (EOFetchSpecification *)fetchSpecification
databaseChannel: (EODatabaseChannel *)channel;
- (BOOL)databaseContext: (EODatabaseContext *)context
shouldUsePessimisticLockWithFetchSpecification: (EOFetchSpecification *)fetchSpecification
databaseChannel: (EODatabaseChannel *)channel;
- (void)databaseContext: (EODatabaseContext *)context
didSelectObjectsWithFetchSpecification: (EOFetchSpecification *)fetchSpecification
databaseChannel: (EODatabaseChannel *)channel;
- (NSDictionary *)databaseContext: (EODatabaseContext *)context
shouldUpdateCurrentSnapshot: (NSDictionary *)currentSnapshot
newSnapshot: (NSDictionary *)newSnapshot
globalID: (EOGlobalID *)globalID
databaseChannel: (EODatabaseChannel *)channel;
- (BOOL)databaseContext: (EODatabaseContext *)databaseContext
shouldLockObjectWithGlobalID: (EOGlobalID *)globalID
snapshot: (NSDictionary *)snapshot;
- (BOOL)databaseContext: (EODatabaseContext *)databaseContext
shouldRaiseExceptionForLockFailure: (NSException *)exception;
- (BOOL)databaseContext: (EODatabaseContext *)databaseContext
shouldFetchObjectFault: (id)fault;
- (BOOL)databaseContext: (EODatabaseContext *)databaseContext
shouldFetchArrayFault: (id)fault;
@end
extern NSString *EOCustomQueryExpressionHintKey;
extern NSString *EODatabaseContextKey;
extern NSString *EODatabaseOperationsKey;
extern NSString *EOFailedDatabaseOperationKey;
#endif /* __EODatabaseContext_h__ */
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