I opted for approach 1 in one project i have on github, speed is not
really an issue since you display only a handful of datasets anyway, but
I tried to keep the editable information outside of the lifecycle
to avoid unnecessary saves and restores.
Werner
Am 07.06.11 21:29, schrieb Martin Koci:
Hi,
how to do editable table in JSF? Not with all rows/cell in editable
state, only with those ones which user switch with icon to update
state.
Example:
<a:column id="emailColumn">
<a:inputText id="email" value="#{rowData.email}" />
</a:column>
<a:column>
<h:commandButton value="Switch to update"
actionListener="#{rowData.switchToUpdate}" />
</a:column>
Solution 1:
add ValueExpression to attribute determines state of component:
<a:inputText id="email" value="#{suser.email}" displayValueOnly="#{!
rowData.editableState}"/>
This solution has serious disadvantages:
-- you must add expression to each component
-- for required additional expression is needed:
required="#{rowData.required}"
-- evaluation of VEs for each row is very slow
Solution 2:
use DataModelListener
Use o implementation of DataModelListener and when UIData scrolls to
row, set property of component directly:
uiComponent.setDisplayValueOnly(true|false)
Disadvantages:
-- dependency on DataModel as value for UIData
-- cannot be done from plain XHTML
What do you think about this problem? Do you know any elegant solution
for this?
Thanks,
Kočičák
