getNameClass
public final NameClass getNameClass()
obtains a constraint over tag name.
ElementExp is cannot be shared because NameClass has to be mutable
to absorb the difference of RELAX and TREX.
In case of TREX, name class will be determined when parsing ElementExp itself.
Thus effectively it's immutable.
In case of RELAX, name class will be determined when its corresponding Clause
object is parsed.
- Specified by:
getNameClass
in interface NameClassAndExpression
- Specified by:
getNameClass
in class ElementExp