[STR-1964] [taglib] errors messages tags enhancement: make them show only errors/messages

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 1.1.0
• Fix Version/s: 1.4.x
• Component/s: Tag Libraries
• Environment: Operating System: other; Platform: Other
• Bugzilla Id: 26668
• Assignee: Unassigned
• Reporter: Pavel
• Created: 05/Feb/04 03:36
• Updated: 08/Mar/08 23:47

Description

The problem is that after form validate method returns the collection of errors
it's hard to separate them into errors and messages. Very frequently there is a
need to render errors differently than the messages. The suggestion is to add
attributes errorsOnly=�true/[false]� to the html:errors and messagesOnly=�true/
[false]� to the html:messages tags. It’s very simple enhancement but it will
definitely be used a lot.

The ErrorsTag would have to be modified slightly to cast to ActionMessage base
class instead of ActionError and then the check for ActionError:
ActionMessage report = (ActionMessage)iter.next();
If(isErrorsOnly() && !(report instanceof ActionError)) continue;

Similarly, the MessagesTag can be enhanced to show only messages, ignoring the
errors:
ActionMessage report = (ActionMessage)iter.next();
If(isMessagesOnly() && report instanceof ActionError) continue;

Then in the action form’s validate method both ActionError and ActionMessage
instances can be added to the ActionErrors collection and then displayed
differently by html:errors and html:messages tags.

Note. There is currently a message attribute in the html:messages tag but it’s
not a convenient way to separate errors and messages in the action form.