Do Not Inflate WTReferences
You may be tempted to write validation code like this. Don't do it.
@Override
public UIValidationResultSet performFullPreValidation
(UIValidationKey validationKey,
UIValidationCriteria validationCriteria, Locale locale)
throws WTException
{
Persistable contextObject =
validationCriteria.getContextObject().getObject();
WTContainer container =
validationCriteria.getParentContainer().getReferencedContainer();
if (!contextObject instanceof WTPart){
...
}
if (!container instanceof PDMLinkProduct){
...
}
}
The code above is performing a relatively costly operation of inflating the WTReferences held in the UIValidationCriteria to Persistables. There may be cases where inflating those objects is not avoidable, but there are also many cases where it can be avoided. If all you really need to know is if the context object or parent container is an instance of some class, you can use the isAssignableFrom() method instead, like this:
@Override
public UIValidationResultSet performFullPreValidation
(UIValidationKey validationKey,
UIValidationCriteria validationCriteria, Locale locale)
throws WTException
{
WTReference contextObjectRef =
validationCriteria.getContextObject();
WTContainerRef containerRef =
validationCriteria.getParentContainer();
if
(!WTPart.class.isAssignableFrom(contextObjectRef.getReferencedClas
s())){
...
}
if (!PDMLinkProduct.class.isAssignableFrom(containerRef.getReferenced
Class())){
...
}
}