[news.eclipse.tools] Re: pb building TreeView

[anthony.saucet@xxxxxxxxxxx (anthony saucet)]

getChildNodes() is not null BUT getChildNodes().getLength() = 0 !!!
I've printed out what happens in class contentProvider:

getChildNodes: !null
j: 0                             /* getChildNodes().getLength() */
contentPovider getChildren end   /* end of method getChildren() */
hasChild                         /* call method hasChild */
contentPovider getChildren       /* calls method getChildren() */

and when tries j = getChildNodes().getLength(), stops here and after lot
of things I didn't catch, exception.
anthony


Knut Radloff wrote:

> Does getChildNodes return null when there are no more children? You can set
an exception breakpoint in the debugger and find
> out.where the exception is occurring.

> Knut

> PS: Please continue the thread on eclipse.platform, eclipse.tools should no
longer be used and will be made read-only soon.

> "anthony saucet" <anthony.saucet@xxxxxxxxxxx> wrote in message
news:b8bbcv$u1r$1@xxxxxxxxxxxxxxxx
> > I'm trying to build a TreeView in my perspective to have a look on a DOM
> > tree built in memory.
> > I've implemented the TreeView with new TreeViewer, called
> > setContentProvider() and setLabelProvider(). setInput() gets the
> > rootElement of my DOM tree. Then in class contentProvider, the tree is
> > being built by getChildren(), and everything seems ok.
> > here's the code to get the children:
> >
> >    public Object[] getChildren(Object element) {
> > Object elnts[]=new Object[20];
> > int i = 0;
> > int j=((Element)element).getChildNodes().getLength();
> >
> > for(Node child = ((Element)element).getFirstChild(); i<j;
> > ((Element)element).getNextSibling()){
> > elnts[i]=((Element)element).getChildNodes().item(i);
> > i++;
> > }
> > return elnts;
> >    }
> >
> > I don't really know what happens BUT when it arrives at the end, when no
> > more child or items, it tries to continue and to create the tree and the
> > following message appears:
> > "Unable to create part: Tree" from
> > eclipse.core.internal.runtime.InternalPlatform
> > and the exception: "nullPointerException".
> >
> > Does anybody have an idea of what I need to do, or what I missed ?
> > many thx
> >