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Java Objects in Result trees
Added by Anonymous about 20 years ago
Legacy ID: #2834222
Legacy Poster: Gunther Schadow (gschadow)
Hi Michael, would it be possible to allow Java Objects as value in Result trees? I
can have such Objects as values of variables or as members of sequences, but when I put
them into an XML attribute, it gets converted to a string. However, I'd like to have
those Objects in intermediate XML structures to process. Of course I understand that
those Objects couldn't be output as Objects in the final result documents, but in
intermediate documents they could be used. Examlple: <xsl:variable
name="system-io"
xmlns:sys="java:java.lang.System"> <channel
name="input" value="{sys:in()}"/>
<channel name="output"
value="{sys:out()}"/> <channel
name="error" value="{sys:err()}"/>
</xsl:variable> <xsl:variable name="blurb"
xmlns:ps="java:java.io.PrintStream"
select="ps:println($system-io[@name eq 'input],'Hello
World')"/> thanks, -Gunther
Legacy ID: #2834361
Legacy Poster: Michael Kay (mhkay)
The tree construction model in both XSLT and XQuery is that you can only get a typed
value for an element or attribute by first constructing the string value and then
putting it through validation. So I think your idea would significantly upset this
model. As it happens, Saxon currently always stores the string value or a node plus the
type annotation, rather than storing the typed value. That could be changed (and might
change), but it doesn't alter the construction semantics. Michael Kay
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