This is IXRecordManager.h in view mode; [Download] [Up]
/*
IXRecordManager.h
Copyright 1991, NeXT Computer, Inc.
*/
#import <btree/IXPostingCursor.h>
#import <mach/cthreads.h>
#import "IXAttributeParser.h"
#import "IXPostingList.h"
@class IXStore, IXAttribute, IXBTreeCursor;
extern IXAttributeParser *IXDefaultAttributeParser();
/* The count method returns the number of user supplied objects, plus the */
/* number of attributes. To find the number of user supplied objects, subtract */
/* the number of attributes, returned by attributeCount, from the count.*/
/* Note that when the class of an object activated by a record manager doesn't*/
/* exist in the executable image, new class and meta class objects are created*/
/* and added to the run time. The method list is empty, restricting instances*/
/* to behavior inherited from existing superclasses. If another version of the*/
/* class is found in the executable image, however, then the method list of the*/
/* loaded version will be copied to the new class.*/
@interface IXRecordManager: Object
<IXNameAndFileAccess, IXRecordWriting, IXTransientAccess, IXTransientMessaging, IXAttributeBinding>
{
struct mutex _mutexLock;
id _storeDirectory;
id _dataRepository;
BOOL _freeStore;
unsigned _handle;
char *_handleName;
IXStore *_store;
struct _NXMapTable *_attributeNames;
struct _NXMapTable *_attributeLists;
struct _NXMapTable *_privateCursors;
IXBTreeCursor *_attributeBTree;
IXBTreeCursor *_attributeTable;
id _delegate;
}
/* Returns the store, e.g., [[client store] startTransaction].*/
- (IXStore *)store;
/* These methods manage named attributes based on selectors.*/
- removeAttributeNamed:(const char *)name;
- addAttributeNamed:(const char *)name forSelector:(SEL)selector;
- (BOOL)hasAttributeNamed:(const char *)name;
- (unsigned)attributeCount; /* returns the number of attributes.*/
- (char *)attributeNames;
- (IXPostingCursor *)cursorForAttributeNamed:(const char *)name;
- (SEL)selectorForAttributeNamed:(const char *)name;
- (char *)classNames;
- (char *)attributeNamesForClass:aClass;
- clean; /* removes all discarded records.*/
- discardRecord:(unsigned)record; /* marks a record for later removal.*/
- reclaimRecord:(unsigned)record; /* reclaims a discarded record.*/
- (unsigned)capacity; /* returns the highest record number in use.*/
- (IXPostingList *)contents; /* returns all records in the receiver.*/
- (IXPostingList *)discards; /* returns the discarded records.*/
- (IXPostingList *)removals; /* returns the handles of all removed records.*/
- (IXPostingList *)recordsForClass:aClass; /* does not include subclasses.*/
/* These methods manage the subset of the class hierarchy to which a given */
/* attribute applies. They are version sensitive.*/
- setTargetClass:aClass forAttributeNamed:(const char *)name;
- getTargetName:(const char **)target andVersion:(unsigned *)version
forAttributeNamed:(const char *)name;
/* These methods manage an optional user supplied attribute description.*/
- getDescription:(char **)aDescription forAttributeNamed:(const char *)name;
- setDescription:(const char *)aDescription
forAttributeNamed:(const char *)name;
/* Setting a comparison format provides for access to the standard BTree */
/* comparators. The comparison format is remembered across frees.*/
- (const char *)comparisonFormatForAttributeNamed:(const char *)name;
- setComparisonFormat:(const char *)aFormat
forAttributeNamed:(const char *)name;
/* This defaults to string comparison. Otherwise, it must be set every time*/
/* the record manager is initialized from the store.*/
- getComparator:(IXComparator **)comparator andContext:(const void **)context
forAttributeNamed:(const char *)name;
- setComparator:(IXComparator *)comparator andContext:(const void *)context
forAttributeNamed:(const char *)name;
/* Setting a parser on an attribute causes it to be potentially multi- valued. */
/* The attribute's value is parsed into one or more sub- values for inversion.*/
- (IXAttributeParser *)parserForAttributeNamed:(const char *)name;
- setParser:(IXAttributeParser *)aParser
forAttributeNamed:(const char *)name;
/* The delegate is passed as the source for the IXRecordTranscription protocol*/
- setDelegate:anObject;
- delegate;
/* These methods are used to get and set the value of named properties */
/* consisting of arbitrary binary data. Setting a length of zero removes the */
/* named property from the record altogether.*/
- (BOOL)getValue:(void **)value andLength:(unsigned *)length
ofBlob:(const char *)name forRecord:(unsigned)record;
- (BOOL)setValue:(const void *)value andLength:(unsigned)length
ofBlob:(const char *)name forRecord:(unsigned)record;
/* These methods are used to establish and access attributes other than the */
/* method attributes managed by name by the preceding methods.*/
- addAttribute:(IXAttribute *)anAttribute;
- (const IXAttribute *)attributeNamed:(const char *)name;
- removeAttribute:(IXAttribute *)anAttribute;
@end
/* Any or all of the following methods are optional.*/
@interface Object(IXRecordManagerDelegate)
/* Called after an object was read from the data repository.*/
- source:aSource didRead:anObject forRecord:(unsigned)record;
/* Called after an object was added to the data repository.*/
- source:aSource didAdd:anObject forRecord:(unsigned)record;
/* Called after an object was removed from the data repository.*/
- source:aSource didRemove:anObject forRecord:(unsigned)record;
@end
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.