Hi!
I hope its not wrong to post this to the developer list at first, but I
think there is a technical problem with the aliasbean.
Our jsf looks like this (for sure, we use include for the dataTable):
<x:aliasBeansScope>
<x:aliasBean alias="#{coTopicEdit}" value="#{coAddressEdit}" />
<h:dataTable var="topic" value="#{coTopicEdit.topics}"
binding="#{coTopicEdit.genericTopicTable}" >
....
</h:dataTable>
<h:commandLink value="xx"/>
</x:aliasBeansScope>
The page renders correctly for the first time, but if you press the
commandLink myfaces fails in the restoreView phase.
The reason is simple:
During LifecycleImpl.restoreView myfaces tries to attach each component
to the backing bean (in recursivelyHandleComponentReferencesAndSetValid
- "binding.setValue").
Now if it comes to the binding of the dataTable the alias bean havent
had the chance to reassign its alias and thus the ValueBinding for
"#{coTopicEdit.genericTopicTable}" fails.
To workaround it I create my own ViewHandler (code follows).
I hooked into restoreView - process the view recursivley and call
"makeAlias" on each alias bean using reflection (the method is package
private).
This IS a hack and (I think) it breaks the scope of the alias , but for
now I am happy with it.
Any ideas how to solve it correctly?
And now the code in case someone else needs it too:
public UIViewRoot restoreView(FacesContext facesContext, String viewId)
{
UIViewRoot root = super.restoreView(facesContext, viewId);
if (root != null)
{
processAliases(facesContext, root);
}
return root;
}
protected void processAliases(FacesContext context, UIComponent root)
{
if (root == null)
{
return;
}
for (Iterator it = root.getFacetsAndChildren(); it.hasNext(); )
{
UIComponent component = (UIComponent)it.next();
if (component instanceof AliasBean)
{
AliasBean alias = (AliasBean) component;
try
{
Method makeAliasMethod =
alias.getClass().getDeclaredMethod("makeAlias", FacesContext.class);
makeAliasMethod.setAccessible(true);
makeAliasMethod.invoke(alias, context);
}
catch (NoSuchMethodException e)
{
log.warn(e.getLocalizedMessage(), e);
}
catch (IllegalAccessException e)
{
log.warn(e.getLocalizedMessage(), e);
}
catch (InvocationTargetException e)
{
log.warn(e.getLocalizedMessage(), e);
}
}
processAliases(context, component);
}
}
---
Mario
