Re: Beagle,Querying extended properties

["Joe Shaw" <joe joeshaw org>]

Hi,

Sorry for the delay, I'm digging myself out from a mountain of
neglected email. :(

On 6/19/07, Daniel Labella de la Cruz <dani labella gmail com> wrote:
> Hello!!, I have a problem, I'm trying to put the code on
> FIleSystemQueryable.cs but I don't know if I'm doing somethig wrong or it
> just don't work....
> I added this code on ExtendedAttribute.cs inside Util directory for listing
> extended properties...
>
>         public static ArrayList List (string path)
>         {
>             string[] XPropertiesNames;
>             ArrayList XPropertiesList=new ArrayList();
>             if(! FileSystem.Exists(path))
>                 throw new IOException (path);
>             Syscall.listxattr (path,out XPropertiesNames);
>             for (int i=0 ; i<XPropertiesNames.Length ; i++)
>             {
>                 XPropertiesList.Add (XPropertiesNames[i]);
>             }
>             return XPropertiesList;
>         }

I don't see anything wrong with this function, but I would probably
change it to just return string[], since you wouldn't ever need to
change the return value.

> and then added the following method to FileSystemQueryable.cs
>
>        public static void AddExtendedProperties (Indexable      indexable,
>
> string         path)
>         {
>             ArrayList XPropertyList=new ArrayList();
>             string XPropertyValue;
>             string[] PropertyName;
>             XPropertyList=Util.ExtendedAttribute.List(path);
>             foreach (string XPropertyName in XPropertyList)
>             {
>
> XPropertyValue=Util.ExtendedAttribute.Get(path,XPropertyName);
>                 PropertyName=XPropertyName.Split('.');
>                 indexable.AddProperty(Beagle.Property.New
> ("xattr:"+XPropertyValue,
>
> PropertyName[PropertyName.Length-1]));
>
>             }
>         }

I'm not really sure what you're trying to use for key-value here.
You're taking the value of the xattr and using it as part of the
property key.  If I have an xattr "user.testing.key" = "value", your
Beagle property will be "xattr:value" = "key", and I'm pretty sure
that's not what you want.

> and then I make a call to this method on AddFile method
>          .
>          .
>          .
>           if (indexable != null) {
>                 Scheduler.Task task;
>                 //a call to add extended properties
>                 AddExtendedProperties (indexable,path);
>                 //
>                 task = NewAddTask (indexable);
>                 task.Priority = Scheduler.Priority.Immediate;
>                 ThisScheduler.Add (task);
>             }
>             .
>             .
>             .
> after this, it compile ok, but I don't know if I'm doing somethig wrong
> querying the extended attributes (maybe I'm querying with wrong syntax) or
> simply the code I put doesn't work...

I think the item I mentioned above is why searches aren't working for
you.  You might want to search for other things you know will match
(like the file name, or a unique word contained inside the document)
and use beagle-query --verbose.  That will give you the list of all
the properties on the document.

Joe