Mike,
Not sure howm much your solution is a solution. If you have an object with
upwards of 3000 nodes and, moreover, the need is to do
getObjectUsefullName().getPropertyOtherUsefullName() in different
combinations.
While OGNL fascilitated this, because usefull names are not lost and also
those paths can ne encoded in Hivemind rules to e.g. inject values into the
object being called, a difficulty I encountered was whether the call should
be
getParentOfObjectUsefullName().getObjectUsefullName().getPropertyOtherUsefullName()
or getObjectUsefullName().getPropertyOtherUsefullName() as only one would
ensure the parent was instantiated correctly and non null for the property
call. With a large object graph this, of course, bearing in mind differences
between testing and production, was a puzzle.
Adam
On 28/03/06, Mike Snare <[EMAIL PROTECTED]> wrote:
>
> Another way is to use an accessor method in the container, e.g.
> getFOTitle(). Implementation as follows:
>
> public String getFOTitle() {
> FirstObject fo = getFirstObject();
> if (fo != null) {
> return fo.getTitle();
> }
> return "";
> }
>
> It has the benefits of not needing to use the pageBeginRender, not
> requiring a bean to store it (plus the hit of object creation), and
> reducing the ognl work that needs to be done.
>
> Then in your template just use ognl:FOTitle.
>
> -Mike
>
> On 3/28/06, Eduardo Valentim <[EMAIL PROTECTED]> wrote:
> > Hi marc,
> >
> > You can do this in your page class:
> >
> > @Bean
> > public abstract FirstObject getFirstObject();
> >
> > or, put this in your .page:
> >
> > <bean name="firstObject" class="the.package.FirstObject"/>
> >
> > And in the ognl expression:
> >
> > ... value="ognl:beans.firstObject.title" ...
> >
> > AND leaves tapestry to work for you.
> >
> > I think that I am correct!!! :)
> >
> > On Tue, 2006-03-28 at 08:27 +0200, Marc Ende wrote:
> > > Hi,
> > >
> > > I'm currently looking for a solution for the following problem:
> > >
> > > I've got some @Input, @Text and @TextArea Fields in a Form.
> > > These are filled with a value="ognl:firstObject.title" for example.
> > > If the firstObject is null it causes an exception (source is null for
> > > getProperty(null, "title"))
> > >
> > > I've tried to do something like an @If with condition ognl:firstObject
> > > and conditionValue="null" to detect the null and avoid parsing the
> > > statements wich causes the exceptions.
> > > But this way wasn't successful.
> > >
> > > So, my question: wich is the common way to handle this cases?
> > >
> > > Thanks for your help.
> > >
> > > marc
> > >
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> >
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> >
>
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