1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
/*
Grr RSS Reader
Copyright (C) 2006, 2007 Guenther Noack <guenther@unix-ag.uni-kl.de>
Copyright (C) 2009 GNUstep Application Team
Riccardo Mottola
This application is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This application 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 General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111 USA.
*/
#import "NSSet+ArticleFiltering.h"
#import "Article.h"
@implementation NSSet (ArticleFiltering)
/**
* Searches the articles contained in the receiver for the given string.
* Returns the result set of articles that matched the search string.
* If the search string is nil or empty, the receiver itself is returned.
*/
- (NSSet*) subsetFilteredForString: (NSString*) searchString
{
NSArray* articles;
unsigned subsetSize = 0;
id<Article>* subsetObjects;
int i;
NSSet* resultSet;
if (searchString == nil || [searchString length] == 0) {
return self;
}
articles = [self allObjects];
subsetObjects = malloc( sizeof(id) * [articles count] );
for (i=0; i<[articles count]; i++) {
id<Article> article = [articles objectAtIndex: i];
NSString* headline = [article headline];
if (headline != nil) {
if ([headline rangeOfString: searchString].location != NSNotFound) {
subsetObjects[subsetSize] = article;
subsetSize ++;
}
}
}
NSLog(@"filtered down to %d of %d articles.", subsetSize, [articles count]);
resultSet = [NSSet setWithObjects: subsetObjects count: subsetSize];
free( subsetObjects );
return resultSet;
}
@end
|
