It seems that function-available() only works if you subsequently call the
function. This stylesheet returns "Not Available". If you uncomment the
value-of instruction it returns a random number. I got the same results on
versions 2.6.0 and 2.7.1.
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
version="1.0">
<xsl:template match="/">
<xsl:choose>
<xsl:when test="function-available('Math:random')"
xmlns:Math="xalan://java.lang.Math">
<!-- <xsl:value-of select="Math:random()"/> -->
</xsl:when>
<xsl:otherwise>Not Available</xsl:otherwise>
</xsl:choose>
</xsl:template>
</xsl:stylesheet>
In most cases, code that calls function-available() will subsequently call
the function anyway, but not always. I ran into this issue because my code
generates a stylesheet, and the generated stylesheet calls the function.
- Chuck
