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//
// HJWeakMutableArray.m
// hjlib
//
// Copyright Hunter and Johnson 2009, 2010, 2011
// HJCache may be used freely in any iOS or Mac application free or commercial.
// May be redistributed as source code only if all the original files are included.
// See http://www.markj.net/hjcache-iphone-image-cache/
#import "HJWeakMutableArray.h"
@implementation HJWeakMutableArray
+(HJWeakMutableArray*) arrayWithCapacity:(int)capacity {
return [[[HJWeakMutableArray alloc] initWithCapacity:capacity] autorelease];
}
-(HJWeakMutableArray*) initWithCapacity:(int)capacity {
[super init];
array = [[NSMutableArray arrayWithCapacity:capacity] retain];
return self;
}
-(void) dealloc {
[array release];
[super dealloc];
}
- (void)addObject:(id)anObject {
[array addObject:[NSValue valueWithNonretainedObject:anObject]];
}
-(id)objectAtIndex:(int)i {
return [(NSValue*)[array objectAtIndex:i] nonretainedObjectValue];
}
- (void) removeObject:(id)objToRemove {
for (int i=0; i<[array count]; i++) {
NSValue* val = [array objectAtIndex:i];
id obj = [val nonretainedObjectValue];
if ([obj isEqual:objToRemove]) {
[array removeObjectAtIndex:i];
return;
}
}
return;
}
- (id) findObject:(id)obj {
for (int i=0; i<[array count]; i++) {
NSValue* val = [array objectAtIndex:i];
id objI = [val nonretainedObjectValue];
if ([objI isEqual:obj]) {
return objI;
}
}
return nil;
}
-(int)count {
return [array count];
}
- (NSEnumerator*)objectEnumerator {
return [[[HJWeakMutableArrayEnumerator alloc] initWithInternalArray:array] autorelease];
}
- (NSString*)description {
NSMutableString* s = [NSMutableString stringWithCapacity:100];
[s appendString:@"Weak array {\n"];
for (NSValue* v in array) {
[s appendString:[[v nonretainedObjectValue] description]];
[s appendString:@" "];
[s appendFormat:@"%u",[[v nonretainedObjectValue] retainCount]];
[s appendString:@"\n"];
}
[s appendString:@"}"];
return s;
}
+(void)test {
/*
HJWeakMutableArray* array = [HJWeakMutableArray arrayWithCapacity:4];
NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
NSString* s = [[NSString stringWithFormat:@"zero"] retain];
NSUInteger i1 = [s retainCount];
[array addObject:s];
NSUInteger i2 = [s retainCount];
[array addObject:[[NSString stringWithFormat:@"one"] retain]];
[array addObject:[[NSString stringWithFormat:@"two"] retain]];
[array addObject:[NSString stringWithFormat:@"three"]];
for (id obj in [array objectEnumerator]) {
NSLog(@"obj %@ retain count %u",obj,[obj retainCount]);
}
NSEnumerator* e = [array objectEnumerator];
id obj = [e nextObject];
id all = [e allObjects];
[pool drain];
*/
}
@end
@implementation HJWeakMutableArrayEnumerator
-(HJWeakMutableArrayEnumerator*)initWithInternalArray:(NSArray*)array {
arrayEnum = [array objectEnumerator];
[arrayEnum retain];
return self;
}
-(void)dealloc {
[arrayEnum release];
[super dealloc];
}
-(id)nextObject {
NSValue* val = (NSValue*)[arrayEnum nextObject];
return [val nonretainedObjectValue];
}
-(NSArray*)allObjects {
NSMutableArray* all2 = [NSMutableArray arrayWithCapacity:10];
for (NSValue* val in [arrayEnum allObjects]) {
//the value _does_ get retained here
[all2 addObject:[val nonretainedObjectValue]];
}
return all2;
}
@end
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