Implementing Nepomuk as another backend for tagging

Hi KDE Folks,

     I got some nice comments on tagging review in the previous week. The most important points in the review are

1). Required a unittest for the new tagging class

     For this one I created a test named KoResourceTagging_test in libs/widgets/tests and it does all the unit test required for the tagging class. I tested all the functionalities of tagging class by taking various examples. And the testing helped me to find out two logical bugs. I solved them also. 😀

2). Interaction wise needs some improvement.

    The tooltips of the icons under the tagging lineedit are improved, so that they don’t seem to belong to the tagging process. This is the one change I corrected but still need to get reviews from users. So, that I can improve it better.;)

3). Nepomuk as another backend

    Many KDE people are asking the question ” why don’t you use nepomuk as backend ? ” For this, the only answer we have is ” we need compatibility with GIMP tagging system.” But afterwards we felt that ” why don’t we implement nepomuk as another backend along with XML ?”. Then Boudewijn Rempt suggested to go on in this direction and we started working . .

The plan for implementing this change is that

Whenever application is running, we will use tagObject (QMultiHash Object) for all adding, deleting and searching irrespective of backend. But at the time of storing or retrieving,there will be some change.

Just we will provide some option to the user, asking whether he uses nepomuk or XML ?

• If user wants Nepomuk, we will store tags info by Nepomuk by adding two more functions : readNepomukRepo() and writeNepomukRepo() in KoResourceTagging class
• If users wants XML , we will have the functions readXML() and writeXML already. we will use them

But I face some problems in implementing this idea ,

This is the code :

void KoResourceTagging::writeNepomukRepo()

{

  qDebug() << ” I am in ;”;

  QStringList resourceNames = m_tagRepo.uniqueKeys();

  qDebug() << “Resource Names List : ” << resourceNames;

  foreach(QString resourceName, resourceNames) {

     qDebug() << ” Resource name : ” << resourceName ;

     KUrl kurl(resourceName);

     qDebug() << ” Kurl : ” << kurl.url();

      Nepomuk::File resourceFile = Nepomuk::Resource(kurl).toFile();

      qDebug() << “Resource File Created : ” << resourceFile.url().url();

      QStringList tagNameList = m_tagRepo.values(resourceName);

      qDebug() << ” Tag names : ” << tagNameList;

      foreach(QString tagName, tagNameList) {

            Nepomuk::Tag tag( “ResourceTag” );

            tag.setLabel(tagName);

            qDebug() << “Tag Created “;

            resourceFile.addTag( tag );

            qDebug() << “Resources tagged “;

      }

  }

}

And the output for this is

###

# This one is the output of brush resourceServer when it called writeNepomukRepo()

###

I am in ;

Resource Names List : (“/home/legend/krita-build/inst/share/apps/krita/brushes/A-eroded-cercle-anim.gih”, “/home/legend/krita-build/inst/share/apps/krita/brushes/A-wall-texture.gih”)

Resource name : “/home/legend/krita-build/inst/share/apps/krita/brushes/A-eroded-cercle-anim.gih”

Kurl : “file:///home/legend/krita-build/inst/share/apps/krita/brushes/A-eroded-cercle-anim.gih”

Resource File Created : “file:///home/legend/krita-build/inst/share/apps/krita/brushes/A-eroded-cercle-anim.gih”

Tag names : (“a”)

QObject::startTimer: QTimer can only be used with threads started with QThread

Tag Created

Resources tagged

Resource name : “/home/legend/krita-build/inst/share/apps/krita/brushes/A-wall-texture.gih”

Kurl : “file:///home/legend/krita-build/inst/share/apps/krita/brushes/A-wall-texture.gih”

Resource File Created : “file:///home/legend/krita-build/inst/share/apps/krita/brushes/A-wall-texture.gih”

Tag names : (“bricks”)

Tag Created

Resources tagged

###

# This one is the output of pattern resourceServer. It ends with this error.

###

I am in ;

Resource Names List : (“/home/legend/krita-build/inst/share/apps/krita/patterns/choc_swirl.pat”, “/home/legend/krita-build/inst/share/apps/krita/patterns/java.pat”, “/home/legend/krita-build/inst/share/apps/krita/patterns/wood4.pat”)

Resource name : “/home/legend/krita-build/inst/share/apps/krita/patterns/choc_swirl.pat”

Kurl : “file:///home/legend/krita-build/inst/share/apps/krita/patterns/choc_swirl.pat”

Fatal Error: Accessed global static ‘Nepomuk::ResourceManagerHelper *instanceHelper()’ after destruction. Defined at ../../nepomuk/core/resourcemanager.cpp:310

Aborted.

I need help to solve this problem ? 🙂