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/*
Copyright (c) 1998, 1999, 2000, 2001, 2003, 2004 Benhur Stein
This file is part of Paj.
Paj is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the
Free Software Foundation; either version 2 of the License, or (at your
option) any later version.
Paj 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 Lesser General Public License
for more details.
You should have received a copy of the GNU Lesser General Public License
along with Paj; if not, write to the Free Software Foundation, Inc.,
59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*/
/* FilteredEnumerator.m created by benhur on Sat 14-Jun-1997 */
#include "FilteredEnumerator.h"
@implementation FilteredEnumerator
+ (FilteredEnumerator *)enumeratorWithEnumerator:(NSEnumerator *)orgEnum
filter:(id)f
selector:(SEL)sel
context:(id)c;
{
return [[[self alloc] initWithEnumerator:orgEnum
filter:f
selector:sel
context:c] autorelease];
}
- (id)initWithEnumerator:(NSEnumerator *)orgEnum
filter:(id)f
selector:(SEL)sel
context:(id)c
{
self = [super init];
if (self) {
originalEnumerator = [orgEnum retain];
filter = [f retain];
selector = sel;
context = [c retain];
}
return self;
}
- (void)dealloc
{
[originalEnumerator release];
[filter release];
[context release];
[super dealloc];
}
- (id)nextObject
{
id obj;
while (YES) {
obj = [originalEnumerator nextObject];
if (obj == nil) break;
obj = [filter performSelector:selector
withObject:obj
withObject:context];
if (obj != nil) break;
}
return obj;
}
@end
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