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From "Blake Sullivan (JIRA)" <>
Subject [jira] Updated: (TRINIDAD-1236) Trinidad should be able to state save non-Serializable Lists
Date Mon, 22 Sep 2008 18:24:44 GMT


Blake Sullivan updated TRINIDAD-1236:

    Status: Open  (was: Patch Available)

> Trinidad should be able to state save non-Serializable Lists
> ------------------------------------------------------------
>                 Key: TRINIDAD-1236
>                 URL:
>             Project: MyFaces Trinidad
>          Issue Type: Bug
>          Components: Components
>    Affects Versions: 1.0.9-core, 1.2.9-core
>         Environment: Any environment in which the TreeState is Serialized and a non-Serializable
List implementation (such as SubList) is used.  For example, client state saving or High Availability
>            Reporter: Blake Sullivan
>   Original Estimate: 24h
>  Remaining Estimate: 24h
> Trinidad supports state saving of component attributes by delegating to the PropertyKey
implementations.   For non-CAP_STATE_HOLDER, non CAP_LIST attributes, the PropertyKey assumes
that simply returning the value is sufficient.  If the value is Serializable, this is sufficient
to support client-state saving and fail over.  However, if the value is not-Serializable the
Serialization process will fail when it is attempt.  In particular, a problem can occur with
List.class (as opposed to CAP_LIST) PropertyKeys with a non-Serializable implementation. 
While most common List implementations are Serializable, the implementations that AbstractList
uses to implement sublist() are not.
> The proposal is to change the default PropertyKey saveValue()/restoreValue() implementations
to always use StateUtils.saveList(context, value); for PropertyKey's of type List.class when
the instance is not a ValueExpression.  Note that this won't help the more general case where
the PropertyKey is of type Object.class and a List instance is used for the property value

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