[
https://issues.apache.org/jira/browse/MYFACES-4036?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15299370#comment-15299370
]
Leonardo Uribe commented on MYFACES-4036:
-----------------------------------------
Just to clarify things, _rowStates is a map that holds the information per row
when rowStatePreserved is set to false (default). This variable is "transient"
in nature, because it is only used as long as the cycle is active. _rowStates
usually hold the values retrieved from child components implementing
EditableValueHolder interface. On encodeBegin(...), if there are not validation
errors, the values stored there are discarded and fetch again from the data
model (it is an effect related to setRowIndex(...)). After the component is
rendered,the values are already in the html markup, so it is no longer
necessary to save that information in the state. On the next postback request,
this map is filled on apply request value phase, but again, it has a transient
nature.
According to the spec, the current behavior of UIData is correct, but on
portlet case the idea is we can apply saveState safely at the end of invoke
application phase and restoreState at the begin of render response phase. It is
not as simple as just store the field in the state, because we don't want to
store information in the state that are not required.
The solution is not easy because we need to handle the case of nested UIData
instances.
> UIData state is not restorable when rowStatePreserved is set to true
> --------------------------------------------------------------------
>
> Key: MYFACES-4036
> URL: https://issues.apache.org/jira/browse/MYFACES-4036
> Project: MyFaces Core
> Issue Type: Bug
> Affects Versions: 2.2.10-SNAPSHOT
> Environment: WebSphere Liberty 8.5.5.8, MyFaces 2.2.8, IBM JSF
> Portlet Bridge 1.0
> Reporter: Hank Ibell
> Priority: Minor
>
> A JSF portlet with input fields inside a h:dataTable component will lose
> their local values if validation fails, even when rowStatePreserved is set to
> true.
> The IBM JSF portlet bridge calls processSaveState() on UIViewRoot so that the
> bridge can restore the view state on their RENDER request. After looking at
> UIData, it looks like _initialDescendantFullComponentState is lost between
> Portal's ACTION and RENDER requests (a new UIData object is created on the
> RENDER request). Unfortunately, UIData's _rowDeltaStates will not be restored
> without its initial state.
> It looks like UIData should also save/restore
> _initialDescendantFullComponentState in its saveSate()/restoreState() methods
> since it may be needed to restore _rowDeltaStates.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
