Thanks to Josh this problem has been solved. The culprit was how I
invoked the components. I was using <t:Layout rows="${rows}" ... />
I should use <t:Layout rows="prop:rows" ... />
Thanks for all help! And a special thank to Josh!
--Alec
Davor Hrg wrote:
how is getRows declared in your page class ?
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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