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

["Balaji" <balajik@xxxxxxxxxx>]

Antony, The problem u are encountering might be due to the fact that u are
using an array that has no elements. Use a list and convert it to a array to
return an array of objects.

HTP

"anthony saucet" <anthony.saucet@xxxxxxxxxxx> wrote in message
news:b8bjer$6na$1@xxxxxxxxxxxxxxxx
> getChildNodes() is not null BUT getChildNodes().getLength() = 0 !!!
> I've printed out what happens in class contentProvider:
>
> getChildNodes: !null
> j: 0                             /* getChildNodes().getLength() */
> contentPovider getChildren end   /* end of method getChildren() */
> hasChild                         /* call method hasChild */
> contentPovider getChildren       /* calls method getChildren() */
>
> and when tries j = getChildNodes().getLength(), stops here and after lot
> of things I didn't catch, exception.
> anthony
>
>
> Knut Radloff wrote:
>
> > Does getChildNodes return null when there are no more children? You can
set
> an exception breakpoint in the debugger and find
> > out.where the exception is occurring.
>
> > Knut
>
> > PS: Please continue the thread on eclipse.platform, eclipse.tools should
no
> longer be used and will be made read-only soon.
>
> > "anthony saucet" <anthony.saucet@xxxxxxxxxxx> wrote in message
> news:b8bbcv$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
> > >
>
>
>
>
>