[antlr-interest] Can @init code throw Java exceptions?
Vaclav Barta
vbar at comp.cz
Thu Jul 19 11:49:36 PDT 2007
Hi,
I'm trying to construct an XML document in a tree grammar, and getting an
interesting error. I put the XML doc initialization into the @init block of
the topmost rule:
sourceFile
@init {
DocumentBuilderFactory factory =
DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
document = builder.newDocument();
}
: assignments rules
;
But that generates illegal Java, because the newDocumentBuilder is declared as
throwing javax.xml.parsers.ParserConfigurationException while the enclosing
sourceFile method isn't. I suppose I can put my own try...catch inside and
wrap everything in RuntimeException, but that seems rather inelegant - is
there a better way?
Bye
Vasek
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