// Managed Object Accesors

#define MO_GETTER(type, attr, capattr) \
- (type)attr { \
type tmpValue; \
[self willAccessValueForKey:@#attr]; \
tmpValue = [self primitiveValueForKey:@#attr]; \
[self didAccessValueForKey:@#attr]; \
return tmpValue; }

#define MO_SETTER(type, attr, capattr) \
- (void)set##capattr:(type)value { \
    [self willChangeValueForKey:@#attr]; \
    [self setPrimitiveValue:value forKey:@#attr]; \
    [self didChangeValueForKey:@#attr]; }

#define MO_ACCESSORS(type, attr, capattr) \
MO_GETTER(type, attr, capattr) \
MO_SETTER(type, attr, capattr)


// Managed Object Relationship Accessors

#define MO_REL_GETTER(attr) \
- (NSMutableSet*)attr { \
NSMutableSet *tmpValue; \
[self willAccessValueForKey:@#attr]; \
tmpValue = [self mutableSetValueForKey:@#attr]; \
[self didAccessValueForKey:@#attr]; \
return tmpValue; } 

#define MO_REL_ADD(type, attr, capattr) \
- (void)add##capattr##Object:(type)anObject { \
NSSet *changedObjects = [[NSSet alloc] initWithObjects:&anObject count:1]; \
    [self willChangeValueForKey:@#attr withSetMutation:NSKeyValueUnionSetMutation usingObjects:changedObjects]; \
    [[self primitiveValueForKey:@#attr] addObject:anObject]; \
    [self didChangeValueForKey:@#attr withSetMutation:NSKeyValueUnionSetMutation usingObjects:changedObjects]; \
    [changedObjects release]; } \
- (void)add##capattr:(NSSet *)aSet { \
    [self willChangeValueForKey:@#attr withSetMutation:NSKeyValueUnionSetMutation usingObjects:aSet]; \
    [[self primitiveValueForKey:@#attr] unionSet:aSet]; \
    [self didChangeValueForKey:@#attr withSetMutation:NSKeyValueUnionSetMutation usingObjects:aSet]; }

#define MO_REL_DEL(type, attr, capattr) \
- (void)remove##capattr##Object:(type)anObject { \
    NSSet *changedObjects = [[NSSet alloc] initWithObjects:&anObject count:1]; \
    [self willChangeValueForKey:@#attr withSetMutation:NSKeyValueMinusSetMutation usingObjects:changedObjects]; \
    [[self primitiveValueForKey:@#attr] removeObject: anObject]; \
    [self didChangeValueForKey:@#attr withSetMutation:NSKeyValueMinusSetMutation usingObjects:changedObjects]; \
    [changedObjects release]; } \
- (void)remove##capattr:(NSSet *)aSet { \
    [self willChangeValueForKey:@#attr withSetMutation:NSKeyValueMinusSetMutation usingObjects:aSet]; \
    [[self primitiveValueForKey:@#attr] minusSet:aSet]; \
    [self didChangeValueForKey:@#attr withSetMutation:NSKeyValueMinusSetMutation usingObjects:aSet]; }

#define MO_REL_INT(type, attr, capattr) \
- (void)intersect##capattr:(NSSet *)aSet { \
    [self willChangeValueForKey:@#attr withSetMutation:NSKeyValueIntersectSetMutation usingObjects:aSet]; \
    [[self primitiveValueForKey:@#attr] intersectSet:aSet]; \
    [self didChangeValueForKey:@#attr  withSetMutation:NSKeyValueIntersectSetMutation usingObjects:aSet]; }

#define MO_REL_ACCESSORS_H(type, attr, capattr) \
- (NSMutableSet*)attr; \
- (void)add##capattr##Object:(type)anObject; \
- (void)add##capattr:(NSSet *)aSet; \
- (void)remove##capattr##Object:(type)anObject; \
- (void)remove##capattr:(NSSet *)aSet; \
- (void)intersect##capattr:(NSSet *)aSet;

#define MO_REL_ACCESSORS(type, attr, capattr) \
MO_REL_GETTER(attr) \
MO_REL_ADD(type, attr, capattr) \
MO_REL_DEL(type, attr, capattr) \
MO_REL_INT(type, attr, capattr)