how is getRows declared in your page class ?
On Tue, Apr 1, 2008 at 2:09 PM, Michael Kolmodin <[EMAIL PROTECTED]>
wrote:
> OK, thanks...
>
> In my page, I have <t:myComponent columns="prop:columns"
> rows="prop:rows"/>
>
> The columns argument, a List<String> is just fine.
> The rows argument, a List<MyMap> is the problem.
>
> The page has a List<MyMap> getRows() which is verified.
>
> Looking in MyComponent.java, I have
>
> @Parameter
> private List<MyMap> rows;
>
> @Parameter
> private List<String> columns;
>
> public String getSomethingStrange()
> {
> return rows.get(0).get( "mail" );
> }
>
> The latter getter fails. The debug info is from a breakpoint inside this
> method. The error I get is a classcast error "java.lang.String cannot be
> cast to ...MyMap" If I change the index to 1, there an error "Caused
> by: Index: 1, Size: 1" i. e., index out of bounds.
>
> Davor Hrg wrote:
> > Tapestry support for Java generics is very limited,
> > you need a value encoder to make this work,
> >
> > also, add more details on who calls what... so more is known
> > of the problem you are trying to solve.
> >
> >
> > Davor Hrg
> >
> > On Tue, Apr 1, 2008 at 1:43 PM, Alec Leamas <[EMAIL PROTECTED]>
> wrote:
> >
> >> I have problems passing my own datatype(s) to my own component. The
> >> component takes two parameters, one List<String> and one List<MyMap>.
> >> MyMap is declared as MyMap extends TreeMap {...}.
> >>
> >> The first parameter, a list of strings arrives safely to my component.
> >> However, the other one, seems to be mixed up: when I try to access an
> >> element in my List<MyMap>, it turns out that Tapestry (nothing else
> >> involved) have filled this list with String items, not the expected
> >> MyMap items. In the end, there is a class cast exception when trying to
> >> access the MyMap items as Maps.
> >>
> >> In the Eclipse debugger, it seems that the value of the List<MyMap>
> >> instance variable is a single string holding what looks like the
> >> serialized value of my List<MyMap> list. The start is
> >> "[{key=value,key=value...
> >>
> >> I've tried to contribute coercions between MyMap<->Map, but this desn't
> >> seem to help (?).
> >>
> >> Basically, I'm stucked unless I write everything in several big pages
> >> with duplicated code. Don't really want to do that. :-(
> >>
> >> Any hints out there?
> >>
> >> --alec
> >>
> >> PS Version: 5.0.11 DS
> >>
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> >>
> >
>
>
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