SAX RFD: ModSAX Predefined Features

John Cowan cowan at
Mon Mar 8 15:05:47 GMT 1999

David Megginson wrote:

>   public abstract void setFeature (String featureID, boolean state)
>     throws SAXNotSupportedException;

I want to propose a restriction and an extension:

1) This method cannot be called after any other parser method
has been invoked.

2) This method is allowed to throw a SAXNewParserException, which
encapsulates a replacement parser.  The application should use
the parser inside the exception in place of the original parser.
This allows parsers to push filters on top of themselves, which
complements the ability of applications to push them.

John Cowan		cowan at
	You tollerday donsk?  N.  You tolkatiff scowegian?  Nn.
	You spigotty anglease?  Nnn.  You phonio saxo?  Nnnn.
		Clear all so!  'Tis a Jute.... (Finnegans Wake 16.5)

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