Thanks, Thiago...but (how) can one use this in a page class?
Looks like the method defaultLabel is not static, nor does the
ComponentDefaultProviderImpl (an internal class) have a constructor, so cannot
do either
1. ComponentDefaultProvider.defaultLabel(Resource
side_question_what_would_this_be), or
2. @Inject
private ComponentDefaultProvider labelGetter;
And even is that were (made) possible, there would be same question on Resource
- how create that from variable name?
Sounds like all the capability is there in the framework, just have to re-use
it somehow...
On Monday, June 9, 2014 4:09 AM, Thiago H de Paula Figueiredo
<thiag...@gmail.com> wrote:
On Mon, 09 Jun 2014 05:50:33 -0300, Net Dawg <net.d...@yahoo.com.invalid>
wrote:
> Has anyone used org.apache.tapestry5.corelib.components.Label within
> page class? I looked at the code for Lable and see method like
> beginRender, afterRender...nothing obvious...
Label doesn't have any logic for defining the rendered label. Actually, it
takes it from the associated form field component (if (bodyIsBlank)
writer.write(field.getLabel()); in afterRender()). AbstractField, the
superclass of all Tapestry-provided form field components, has a label
parameter. Its default value is defined by
ComponentDefaultProvidoer.defaultLabel(), called inside
AbstractField.defaultLabel(). So, in the end, here's the actual logic
behind field labels:
public String defaultLabel(ComponentResources resources)
{
Defense.notNull(resources, "resources");
String componentId = resources.getId();
String key = componentId + "-label";
Messages containerMessages =
resources.getContainerResources().getMessages();
if (containerMessages.contains(key)) return
containerMessages.get(key);
return TapestryInternalUtils.toUserPresentable(componentId);
}
Where the resources parameter is the ComponentResources instance of the
field. Summary: it looks up an [field-id]-label message from the messages
file. If found, it's used unchanged. Otherwise, it uses a method
(TapestryInternalUtils.toUserPresentable()) to extract a good user-facing
label from the field name, supposing it follows the Java standards for
field names.
--
Thiago H. de Paula Figueiredo
Tapestry, Java and Hibernate consultant and developer
http://machina.com.br
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