PRoblem with archiving

Hallo,

I do not find my failure.

I have a cocoa-document-application.

When I open a saved document I get this error:

2003-12-11 14:26:37.442 fsRune[964] *** NSUnarchiver: inconsistency
between written and read data for object 0x3e3690

My MyDocument only contains a

RunController * runController;

The RunController does only contain
@interface RunController : NSObject <NSCoding> {
NSMutableArray * runs;


The runs are:
@interface Run : NSObject {
double length_of_pipe; //Streckenlaenge
double height; //höhenmeter

NSCalendarDate * date; //datum
NSString * comments; //kommentar
NSString * location; //ort

int maxPulse; //pulse
int minPulse;
int avgPulse;

int shoeIndex;
}


Quite easy I think.

Now the open and save-routines:

MyDocument:
- (NSData *)dataRepresentationOfType:(NSString *)aType
{
NSLog(@"MyDocumemt:dataRepresentationOfType, Runs:%d",
[runController count]);

[[tableView window] endEditingFor:nil];

return [NSArchiver archivedDataWithRootObject:runController];
}

- (BOOL)loadDataRepresentation:(NSData *)data ofType:(NSString *)aType
{
NSLog(@"MyDocumemt:loadDataRepresentation, Runs:%d", [runController
count]);

[runController release];
runController = [[NSUnarchiver unarchiveObjectWithData:data]
retain];
return YES;
}

The RunController loads and saves this way:

-(id)initWithCoder:(NSCoder*)coder
{
NSLog(@"RunController:initWithCoder, runs:%d", [runs count]);

if(self = [super init]) {
[runs release];
[runs initWithCoder:coder];
}

return self;
}

-(void)encodeWithCoder:(NSCoder*)coder
{
NSLog(@"RunController:encodeWithCoder, runs:%d", [runs count]);

[runs encodeWithCoder:coder];
}

Now the last part, the run:

-(id)initWithCoder:(NSCoder*)coder
{
NSLog(@"Run:initWithCoder");

if(self = [super init]) {
[coder decodeValueOfObjCType:@encode(double)
at:&length_of_pipe];
[coder decodeValueOfObjCType:@encode(double) at:&height];

[self setDate :[coder decodeObject]];
[self setComments:[coder decodeObject]];
[self setLocation:[coder decodeObject]];

[coder decodeValueOfObjCType:@encode(int) at:&maxPulse];
[coder decodeValueOfObjCType:@encode(int) at:&minPulse];
[coder decodeValueOfObjCType:@encode(int) at:&avgPulse];

[coder decodeValueOfObjCType:@encode(int) at:&shoeIndex];
}
return self;
}

-(void)encodeWithCoder:(NSCoder*)coder
{
NSLog(@"Run:encodeWithCoder");

[coder encodeValueOfObjCType:@encode(double) at:&length_of_pipe];
[coder encodeValueOfObjCType:@encode(double) at:&height];

[coder encodeObject:date];
[coder encodeObject:comments];
[coder encodeObject:location];

[coder encodeValueOfObjCType:@encode(int) at:&maxPulse];
[coder encodeValueOfObjCType:@encode(int) at:&minPulse];
[coder encodeValueOfObjCType:@encode(int) at:&avgPulse];

[coder encodeValueOfObjCType:@encode(int) at:&shoeIndex];
}

I logged what happens:

add one run:
2003-12-11 14:26:24.670 fsRune[964] RunController:addRun, count before:0

Saving:
2003-12-11 14:26:29.253 fsRune[964] MyDocumemt:dataRepresentationOfType,
Runs:1
2003-12-11 14:26:29.253 fsRune[964] RunController:encodeWithCoder,
runs:1
2003-12-11 14:26:29.254 fsRune[964] Run:encodeWithCoder
2003-12-11 14:26:29.254 fsRune[964] RunController:encodeWithCoder,
runs:1
2003-12-11 14:26:29.254 fsRune[964] Run:encodeWithCoder

Why there are two times the RunController:encodeWithCoder when I only
have one run in the NSMutableArray?

Okay, now loading:

2003-12-11 14:26:37.436 fsRune[964] MyDocumemt:loadDataRepresentation,
Runs:0
2003-12-11 14:26:37.439 fsRune[964] RunController:initWithCoder, runs:0
2003-12-11 14:26:37.442 fsRune[964] *** NSUnarchiver: inconsistency
between written and read data for object
0x3e3690

Thanks for any help and sorry for my english...

Bye.

In article <1g5whe8.1gjh5wa1w4vvj4N%robert@vermtech.de>,
robert RemoveThis @vermtech.de (Robert W. Kuhn) wrote:

 > Hallo,
 >
 > I do not find my failure.
 >
 > I have a cocoa-document-application.
 >
 > When I open a saved document I get this error:
 >
 > 2003-12-11 14:26:37.442 fsRune[964] *** NSUnarchiver: inconsistency
 > between written and read data for object 0x3e3690

[snip]
 > -(id)initWithCoder:(NSCoder*)coder
 > {
 > NSLog(@"RunController:initWithCoder, runs:%d", [runs count]);
 >
 > if(self = [super init]) {
 > [runs release];
 > [runs initWithCoder:coder];

This is not correct. 'runs' is just an object, so you should decode it
the same way you decode your other objects. Replace the initWithCoder:
line with:

runs = [[coder decodeObject] retain];

 > -(void)encodeWithCoder:(NSCoder*)coder
 > {
 > NSLog(@"RunController:encodeWithCoder, runs:%d", [runs count]);
 >
 > [runs encodeWithCoder:coder];

You have the same problem here. To encode an object, you must call
[coder encodeObject:runs].

You should never call initWithCoder: or encodeWithCoder: directly. The
archiver will do that for you.

The rest of your code looks ok to me. I think that if you fix these
problems then you should be fine.<!-- ~MESSAGE_AFTER~ -->