hi, short addition:
basically it depends on the component lib you are using. e.g. myfaces trinidad supports such indicators out-of-the-box (also based on meta-data - e.g. in combination with extval). -> extval + trinidad -> no additional effort. without trinidad you have to implement a small add-on for extval. you can have a look at [1]. you just have to replace the trinidad specific parts and you have to add the indicator on your own (depending on the found meta-data). e.g.: instead of using coreOutputLabel at: ExtValUtils.configureComponentWithMetaData(facesContext, coreOutputLabel, metaDataResult); you could use the targetComponent (= the input component). after this call you can check if the targetComponent is required. so you keep the compatibility with the required attribute of the component and you can re-use the existing implementation of extval. if you are allowed to donate the add-on, i would commit it to os890 (after reviewing it). regards, gerhard [1] https://svn.apache.org/repos/asf/myfaces/extensions/validator/trunk/component-support/trinidad-support/src/main/java/org/apache/myfaces/extensions/validator/trinidad/interceptor/TrinidadRendererInterceptor.java http://www.irian.at Your JSF powerhouse - JSF Consulting, Development and Courses in English and German Professional Support for Apache MyFaces 2010/4/26 Rudy De Busscher <[email protected]> > hello, > > The main issue with your requirement is that at the time of the rendering > of > the outputlabel, the input text isn't treated yet (because the label is > most > of the time in front of the input field). So the required property of the > input field isn't set yet by the extval framework. (only the information of > the view is applied, not the annotations on the properties of the classes) > > You mention also the renderer interceptor. But standard this renderer is > only hit for any editableValueHolder( like input fields or drop downs). > Since those are the type of components we are interested in ( in doing the > validation). > The labels aren't treated at this moment (see processComponent method in > AbstractValidationInterceptor) so you should write a custom renderer > interceptor to achieve it. > > Your requirements is already on my development list (as an add-on) for a > few > months now but had not the time to start with it. > > So you need to create (at least) the following items: > - A custom renderer interceptor for handling the output labels > - A component initializer that put the * in front of it (caution that it > isn't done multiple times) > - The component initializer should search for the referenced component (by > the for attribute) and do the component initialization of this > EditableValueHolder. Now the @NotNull is taken into account and the * can > be placed. > > You can also look at the Trinidad support module > > http://svn.apache.org/repos/asf/myfaces/extensions/validator/trunk/component-support/trinidad-support > . > It has a label that is capable of putting a * behind the text so it is > possible that there is already the kind of solution to your problem. You > need to port it then only to the standard JSF (or use Trinidad in your > project). > > Regards > Rudy > > On 26 April 2010 14:57, <[email protected]> wrote: > > > Hi there, > > > > I've found some information at > > http://wiki.apache.org/myfaces/Extensions/Validator/DevDoc, that it is > > possible to mark components who require a value via a component > initializer. > > In addition I would like to use bean validation and to annotate a class' > > attributes and mark the input field or even the label of the input field: > > > > 1. @NotNull for an attribute let's say "name" > > 2. Having an output label referencing an input field > > 3. Marking all labels referencing to required fields with a '*' resulting > > in "*name" > > > > I also found the renderer interceptor which seems to be a better choice > for > > me, since I want to manipulate the rendering of the label rather than the > > input component. > > > > Any suggestions? > > > > Thanks. > > > > Traumziele - von Beschreibung bis Buchung jetzt kompakt auf den > > Reise-Seiten von Arcor.de! http://www.arcor.de/rd/footer.reise > > >
