/*
* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016
* Jonathan Schleifer <js@heap.zone>
*
* All rights reserved.
*
* This file is part of ObjFW. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE.QPL included in
* the packaging of this file.
*
* Alternatively, it may be distributed under the terms of the GNU General
* Public License, either version 2 or 3, which can be found in the file
* LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
* file.
*/
#include "config.h"
#import "OFNull.h"
#import "OFString.h"
#import "OFXMLElement.h"
#import "OFDataArray.h"
#import "OFInvalidArgumentException.h"
@interface OFNull ()
- (OFString*)OF_JSONRepresentationWithOptions: (int)options
depth: (size_t)depth;
@end
static OFNull *null = nil;
@implementation OFNull
+ (void)initialize
{
null = [[self alloc] init];
}
+ (OFNull*)null
{
return null;
}
- initWithSerialization: (OFXMLElement*)element
{
void *pool;
[self release];
pool = objc_autoreleasePoolPush();
if (![[element name] isEqual: [self className]] ||
![[element namespace] isEqual: OF_SERIALIZATION_NS])
@throw [OFInvalidArgumentException exception];
objc_autoreleasePoolPop(pool);
return [OFNull null];
}
- (OFString*)description
{
return @"<null>";
}
- copy
{
return self;
}
- (OFXMLElement*)XMLElementBySerializing
{
void *pool = objc_autoreleasePoolPush();
OFXMLElement *element;
element = [OFXMLElement elementWithName: [self className]
namespace: OF_SERIALIZATION_NS];
[element retain];
objc_autoreleasePoolPop(pool);
return [element autorelease];
}
- (OFString*)JSONRepresentation
{
return [self OF_JSONRepresentationWithOptions: 0
depth: 0];
}
- (OFString*)JSONRepresentationWithOptions: (int)options
{
return [self OF_JSONRepresentationWithOptions: options
depth: 0];
}
- (OFString*)OF_JSONRepresentationWithOptions: (int)options
depth: (size_t)depth
{
return @"null";
}
- (OFDataArray*)messagePackRepresentation
{
OFDataArray *data = [OFDataArray dataArrayWithItemSize: 1
capacity: 1];
uint8_t type = 0xC0;
[data addItem: &type];
return data;
}
- autorelease
{
return self;
}
- retain
{
return self;
}
- (void)release
{
}
- (unsigned int)retainCount
{
return OF_RETAIN_COUNT_MAX;
}
- (void)dealloc
{
OF_DEALLOC_UNSUPPORTED
}
@end