| // Turn the document contents into a single savable lump of data |
| - (NSData *)dataOfType:(NSString *)typeName error:(NSError **)outError { |
| #pragma unused(typeName) |
| |
| // Produce the data lump: |
| NSData * retval = [NSKeyedArchiver archivedDataWithRootObject:model]; |
| |
| // If the lump is nil something went wrong |
| // fill out the error object to explain what wrent wrong |
| if ( outError != NULL ) { |
| // The sender wanted an error reported. If there |
| // was a problem, fill in an NSError object |
| if (retval == nil) { |
| // The error object should include an (unhelpful) |
| // explanation of what happened |
| NSDictionary * userInfoDict = [NSDictionary dictionaryWithObjectsAndKeys: |
| @"Internal error formatting data", NSLocalizedDescriptionKey, |
| @"Archiving of data failed. Probably a bug.", NSLocalizedFailureReasonErrorKey, |
| @"There's nothing you can do.", NSLocalizedRecoverySuggestionErrorKey, nil]; |
| |
| *outError = [NSError errorWithDomain:LinearInternalErrorDomain |
| code:linErrCantFormatDocumentData |
| userInfo:userInfoDict]; |
| } else { |
| // No problem. Don't supply an error object. |
| *outError = nil; |
| } |
| } |
| return retval; |
| } |
