I'm trying to make a grid that is backed by a list of items which
implement an interface, however it looks like the grid caches the
concrete type of the first item and expects every other item to be of
the same type.
Is there a way to avoid this behaviour?
Regards, Paul.
Caused by: java.lang.ClassCastException: package.entities.Type2 cannot
be cast to package.entities.Type1
at
$PropertyConduit_12c7bbcb301.getRoot($PropertyConduit_12c7bbcb301.java)
at $PropertyConduit_12c7bbcb301.get($PropertyConduit_12c7bbcb301.java)
at
org.apache.tapestry5.internal.services.CoercingPropertyConduitWrapper.get(CoercingPropertyConduitWrapper.java:36)
at
org.apache.tapestry5.corelib.base.AbstractPropertyOutput.readPropertyForObject(AbstractPropertyOutput.java:152)
at
org.apache.tapestry5.corelib.base.AbstractPropertyOutput.renderPropertyValue(AbstractPropertyOutput.java:132)
at
org.apache.tapestry5.corelib.components.GridCell.beginRender(GridCell.java:28)
public class Type1 implements MyInterface<A>
{....}
public class Type2 implements MyInterface<B>
{....}
public class MyPage
{
public List<MyInterface<?>> getItems()
{
List<MyInterface<?>> list = new ArrayList<MyInterface<?>>();
list.add(new Type1());
list.add(new Type2());
return list;
}
}
MyPage.tml:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd";>
<t:layout xmlns:t="http://tapestry.apache.org/schema/tapestry_5_1_0.xsd";
xmlns:p="tapestry:parameter">
<t:grid source="items" />
</t:layout>
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