GetMetadataForFile.m

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#include <CoreFoundation/CoreFoundation.h>
#include <CoreServices/CoreServices.h>
 
#import <Foundation/Foundation.h>
 
#include "ReadFile.h"
 
/* -----------------------------------------------------------------------------
    Get metadata attributes from file
 
   This function's job is to extract useful information your file format supports
   and return it as a dictionary
   ----------------------------------------------------------------------------- */
 
Boolean GetMetadataForFile(void *thisInterface,
                           CFMutableDictionaryRef attributes,
                           CFStringRef contentTypeUTI,
                           CFStringRef pathToFile)
{
   // Pull any available metadata from the file at the specified path
   // Return the attribute keys and attribute values in the dict
   // Return TRUE if successful, FALSE if there was no data provided
 
   NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
 
   NSMutableSet *nameSet = [[[NSMutableSet alloc] init] autorelease];
   NSMutableSet *titleSet = [[[NSMutableSet alloc] init] autorelease];
 
   if (ReadFile((NSString*)pathToFile, nameSet, titleSet) == -1) {
      [pool release];
      return FALSE;
   }
 
   if ([nameSet count]) {
      NSString *names = [[nameSet allObjects] componentsJoinedByString: @"\n"];
      [(NSMutableDictionary *)attributes setObject: names
                                            forKey: @"ch_cern_root_data_objectName"];
   }
   if ([titleSet count]) {
      NSString *titles = [[titleSet allObjects] componentsJoinedByString: @"\n"];
      [(NSMutableDictionary *)attributes setObject: titles
                                            forKey: @"ch_cern_root_data_objectTitle"];
   }
 
   // memory management
   [pool release];
 
   return TRUE;
}