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/** <title>GSModelLoaderFactory</title>
<abstract>Model loader framework</abstract>
Copyright (C) 1997, 1999 Free Software Foundation, Inc.
Author: Gregory John Casamento <greg_casamento@yahoo.com>
Date: 2005
This file is part of the GNUstep GUI Library.
This library 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.
This library 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 this library; see the file COPYING.LIB.
If not, see <http://www.gnu.org/licenses/> or write to the
Free Software Foundation, 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#import "config.h"
#import <Foundation/NSArray.h>
#import <Foundation/NSData.h>
#import <Foundation/NSDictionary.h>
#import <Foundation/NSEnumerator.h>
#import <Foundation/NSException.h>
#import <Foundation/NSFileManager.h>
#import <Foundation/NSString.h>
#import "GNUstepGUI/GSModelLoaderFactory.h"
@implementation GSModelLoader
+ (NSString *) type
{
return nil;
}
+ (float) priority
{
return 0.0;
}
- (BOOL) loadModelData: (NSData *)data
externalNameTable: (NSDictionary *)context
withZone: (NSZone *)zone
{
[NSException raise: NSInternalInconsistencyException
format: @"Abstract model loader."];
return NO;
}
- (BOOL) loadModelFile: (NSString *)fileName
externalNameTable: (NSDictionary *)context
withZone: (NSZone *)zone
{
NSData *data = [self dataForFile: fileName];
if (data != nil)
{
BOOL loaded = [self loadModelData: data
externalNameTable: context
withZone: zone];
if (!loaded)
NSLog(@"Could not load Nib file: %@", fileName);
return loaded;
}
else
{
return NO;
}
}
- (NSData *) dataForFile: (NSString *)fileName
{
return [NSData dataWithContentsOfFile: fileName];
}
+ (NSComparisonResult) _comparePriority: (Class)loader
{
NSComparisonResult result = NSOrderedSame;
if ([self priority] < [loader priority])
{
result = NSOrderedAscending;
}
if ([self priority] > [loader priority])
{
result = NSOrderedDescending;
}
return result;
}
@end
static NSMutableDictionary *_modelMap = nil;
@implementation GSModelLoaderFactory
+ (void) initialize
{
NSArray *classes = GSObjCAllSubclassesOfClass([GSModelLoader class]);
NSEnumerator *en = [classes objectEnumerator];
Class cls = nil;
while ((cls = [en nextObject]) != nil)
{
[self registerModelLoaderClass: cls];
}
}
+ (void) registerModelLoaderClass: (Class)aClass
{
if (_modelMap == nil)
{
_modelMap = [[NSMutableDictionary alloc] initWithCapacity: 5];
}
[_modelMap setObject: aClass forKey: (NSString *)[aClass type]];
}
+ (Class)classForType: (NSString *)type
{
return [_modelMap objectForKey: type];
}
+ (NSArray *) supportedTypes
{
NSArray *objectArray = [_modelMap allValues];
NSArray *sortedArray = [objectArray sortedArrayUsingSelector:
@selector(_comparePriority:)];
NSEnumerator *oen = [sortedArray objectEnumerator];
Class cls = nil;
NSMutableArray *types = [[NSMutableArray alloc] init];
while ((cls = [oen nextObject]) != nil)
{
[types addObject: [cls type]];
}
return AUTORELEASE(types);
}
+ (NSString *) supportedModelFileAtPath: (NSString *)modelPath
{
NSString *result = nil;
NSFileManager *mgr = [NSFileManager defaultManager];
NSString *ext = [modelPath pathExtension];
if ([ext isEqual: @""])
{
NSArray *objectArray = [_modelMap allValues];
NSArray *sortedArray = [objectArray sortedArrayUsingSelector:
@selector(_comparePriority:)];
NSEnumerator *oen = [sortedArray objectEnumerator];
Class cls = nil;
while ((cls = [oen nextObject]) != nil && result == NO)
{
NSString *path = [modelPath stringByAppendingPathExtension:
(NSString *)[cls type]];
if ([mgr isReadableFileAtPath: path])
{
result = path;
}
}
}
else
{
if ([_modelMap objectForKey: ext] != nil)
{
if ([mgr isReadableFileAtPath: modelPath])
{
result = modelPath;
}
}
}
return result;
}
+ (GSModelLoader *) modelLoaderForFileType: (NSString *)type
{
Class aClass = [GSModelLoaderFactory classForType: type];
GSModelLoader *loader = nil;
if (aClass != nil)
{
loader = AUTORELEASE([[aClass alloc] init]);
}
else
{
[NSException raise: NSInternalInconsistencyException
format: @"Unable to find model loader class."];
}
return loader;
}
+ (GSModelLoader *) modelLoaderForFileName: (NSString *)modelPath
{
NSString *path = [GSModelLoaderFactory supportedModelFileAtPath: modelPath];
GSModelLoader *result = nil;
if (path != nil)
{
NSString *ext = [path pathExtension];
result = [self modelLoaderForFileType: ext];
}
return result;
}
@end
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