Hiding conditional logic using JSF tags

Question

Hi
I'm trying to encapsulate some logic which, dependent on a true / false validation, outputs either one component or another containing a value.
For example...
when the validation is true, output <h:selectOneMenu... containing all available values with selected value highlighted.
when the validation is false, output <h:outputText... containing selected value.
I've tried custom tags but I'm using this to write out very basic tags and I'd prefer to use the JSF HTML tags.
The only option I can see is to write conditional logic in the JSPs to say:
if valid = true
<h:selectOneMenu...
else
<h:outputText...
endif
...but this means the developers must do this for every occurrence and the pages contain lots of conditional logic.
Is there any way to create a custom JSF tag which outputs JSF HTML tags as this seems to be what we want to do?
Thanks D

Answer 1

There is no tag for this, but every HTML component has a 'rendered' attribute which accepts a boolean expression. If it's outcome is true, then the component will be rendered, otherwise it will be hidden.
Here are some basic examples:
<h:someComponent rendered="#{myBean.booleanValue}" />
<h:someComponent rendered="#{myBean.intValue > 10}" />
<h:someComponent rendered="#{myBean.objectValue == null}" />
<h:someComponent rendered="#{myBean.stringValue != 'someValue'}" />
<h:someComponent rendered="#{!empty myBean.collectionValue}" />
<h:someComponent rendered="#{!myBean.booleanValue && myBean.intValue != 0}" />
<h:someComponent rendered="#{myBean.stringValue == 'oneValue' || myBean.stringValue == 'anotherValue'}" />