Retired Document
Important: This sample code may not represent best practices for current development. The project may use deprecated symbols and illustrate technologies and techniques that are no longer recommended.
NoteTaker/GetMetadataForFile.m
/* |
File: GetMetadataForFile.m |
Version: 1.0 |
Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc. |
("Apple") in consideration of your agreement to the following terms, and your |
use, installation, modification or redistribution of this Apple software |
constitutes acceptance of these terms. If you do not agree with these terms, |
please do not use, install, modify or redistribute this Apple software. |
In consideration of your agreement to abide by the following terms, and subject |
to these terms, Apple grants you a personal, non-exclusive license, under Apple's |
copyrights in this original Apple software (the "Apple Software"), to use, |
reproduce, modify and redistribute the Apple Software, with or without |
modifications, in source and/or binary forms; provided that if you redistribute |
the Apple Software in its entirety and without modifications, you must retain |
this notice and the following text and disclaimers in all such redistributions of |
the Apple Software. Neither the name, trademarks, service marks or logos of |
Apple Computer, Inc. may be used to endorse or promote products derived from the |
Apple Software without specific prior written permission from Apple. Except as |
expressly stated in this notice, no other rights or licenses, express or implied, |
are granted by Apple herein, including but not limited to any patent rights that |
may be infringed by your derivative works or by other works in which the Apple |
Software may be incorporated. |
The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO |
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED |
WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN |
COMBINATION WITH YOUR PRODUCTS. |
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR |
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE |
GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION |
OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT |
(INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN |
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
Copyright © 2005 Apple Computer, Inc., All Rights Reserved |
*/ |
#import <AppKit/AppKit.h> |
#include <CoreFoundation/CoreFoundation.h> |
#include <CoreServices/CoreServices.h> |
/* ----------------------------------------------------------------------------- |
Step 1 |
Set the UTI types the importer supports |
Modify the CFBundleDocumentTypes entry in Info.plist to contain |
an array of Uniform Type Identifiers (UTI) for the LSItemContentTypes |
that your importer can handle |
----------------------------------------------------------------------------- */ |
/* ----------------------------------------------------------------------------- |
Step 2 |
Implement the GetMetadataForFile function |
Implement the GetMetadataForFile function below to scrape the relevant |
metadata from your document and return it as a CFDictionary using standard keys |
(defined in MDItem.h) whenever possible. |
----------------------------------------------------------------------------- */ |
/* ----------------------------------------------------------------------------- |
Step 3 (optional) |
If you have defined new attributes, update the schema.xml file |
Edit the schema.xml file to include the metadata keys that your importer returns. |
Add them to the <allattrs> and <displayattrs> elements. |
Add any custom types that your importer requires to the <attributes> element |
<attribute name="com_mycompany_metadatakey" type="CFString" multivalued="true"/> |
----------------------------------------------------------------------------- */ |
/* ----------------------------------------------------------------------------- |
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 */ |
Boolean result = FALSE; |
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; |
NSString * bookPath = [(NSString *)pathToFile stringByAppendingPathComponent:@"Book.plist"]; |
NSDictionary * bookDict = [NSDictionary dictionaryWithContentsOfFile:bookPath]; |
if (bookDict == nil) { |
NSLog(@"Failed to read Book.plist from '%@'", pathToFile); |
goto finish; |
} |
NSAttributedString * text = nil; |
NSData * rtfData = nil; |
rtfData = [[bookDict valueForKeyPath:@"rootObject.objectProperties.coverTitle.objectProperties.rtf"] dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:NO]; |
if (rtfData != nil) { |
text = [[NSAttributedString alloc] initWithRTF:rtfData documentAttributes:NULL]; |
[(NSMutableDictionary *)attributes setObject:[text string] forKey:(id)kMDItemTitle]; |
[text release]; |
} |
result = TRUE; |
finish:; |
[pool release]; |
return result; |
} |
Copyright © 2005 Apple Computer, Inc. All Rights Reserved. Terms of Use | Privacy Policy | Updated: 2005-06-01