The following code in BaseXPath worries me:
public BaseXPath addNamespace(String prefix,
String uri) throws JaxenException
{
NamespaceContext nsContext = getNamespaceContext();
if ( nsContext instanceof SimpleNamespaceContext )
{
((SimpleNamespaceContext)nsContext).addNamespace( prefix,
uri );
return this;
}
throw new JaxenException("Operation not permitted while using a
custom namespace context.");
}
It seems to me that the NamespaceContext interface should declare an
addNamespacePrefix() method of its own so that none of these type checks
and exceptions are necessary. This could be a little tricky if a custom
NamespaceContext were based on a DOM or JDOM node or some other thing
you could not or did not want to add a new mapping to. However, in this
case you'd just need to make the custom NamespaceContext a wraper around
both the node and a SimpleContext. The SimpleContext could hold any
additional or overridden mappings.
--
+-----------------------+------------------------+-------------------+
| Elliotte Rusty Harold | [EMAIL PROTECTED] | Writer/Programmer |
+-----------------------+------------------------+-------------------+
| The XML Bible, 2nd Edition (IDG Books, 2001) |
| http://www.cafeconleche.org/books/bible2/ |
| http://www.amazon.com/exec/obidos/ISBN=0764547607/cafeaulaitA/ |
+----------------------------------+---------------------------------+
| Read Cafe au Lait for Java News: http://www.cafeaulait.org/ |
| Read Cafe con Leche for XML News: http://www.cafeconleche.org/ |
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