how to use java in xslt

Question

how to use java in xslt and avoid below errors:

Cannot find a 1-argument function named {java:com.poc.XSDDateTimeFormatter}toXSD(). Reflexive calls to Java methods are not available under Saxon-HE and Cannot find a 2-argument function named {urn:java:com.poc.NLDataUnitTestTimeCalc}computeTestTime(). Reflexive calls to Java methods are not available under Saxon-HE

computeTestTime method of NLDataUnitTestTimeCalc class

public static long computeTestTime( String startDateStr, String endDateStr) {

  long testTime= 0;
  long longStartDate= 0;
  long longEndDate= 0; 

  for( String format: formats) {
     try {
        SimpleDateFormat formatter = new SimpleDateFormat(format);

        Date startdate = formatter.parse(startDateStr);
        Date enddate = formatter.parse(endDateStr);
        longStartDate=startdate.getTime();
        longEndDate=enddate.getTime();
        testTime = (Math.abs(longEndDate-longStartDate)/1000);
        break; 
     }
     catch (ParseException ex) {
        //ignore
     }
  }
  return testTime;

}

toXSD method of XSDDateTimeFormatter class

public static String toXSD( String dateStr) {
  for( String format: formats) {
     try {
        Date date = new SimpleDateFormat( format).parse( dateStr);
        String xsd = new SimpleDateFormat( XSDdateTimeFormat).format( date);

        //special case for xsd:dateTime timezone format
        return 
                xsd.substring(0, xsd.length() - 2) + 
                ':' +
                xsd.substring(xsd.length() - 2);
     } catch (ParseException ex) {
        //ignore
     }
  }

  return dateStr;   }

xslt

<xsl:template match="/Event">

        <bus:Timestamp> 
          <xsl:value-of                   xmlns:XSDDateTimeFormatter="java:com.amd.pde.integration.XSDDateTimeFormatter"
              select="XSDDateTimeFormatter:toXSD( //TimeStamp)"
           />   
        </bus:Timestamp>

sample xml

<Event>   
<Message>BEGINEXECUTION</Message>
<TimeStamp>20080111000419146</TimeStamp>
<EquipmentID>stack</EquipmentID>
</Event>

let me know how to resolve the issue Working example for the same will be better — Santosh Kumar
– Santosh Kumar, Commented Mar 26, 2018 at 14:52

burki · Accepted Answer · 2018-03-26 15:07:44Z

3

As the error message says, you use Saxon-HE, but extension functions in Java are only supported by Saxon-PE and Saxon-EE. The Saxon-Docs mention this explicitly.

I guess you have two options

Buy Saxon-PE or Saxon-EE
Implement your functions in XSL

answered Mar 26, 2018 at 15:07

burki

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8 Comments

Santosh Kumar Over a year ago

I did not find any dependency either for Saxon-PE or Saxon-EE.

burki Over a year ago

Yes, that is the problem. You don't have Saxon-PE or Saxon-EE available, but Saxon-HE (the free edition). But the free edition cannot call Java functions from XSL. For this you need one of the two paid editions. This is what Saxon says in the error message.

Martin Honnen Over a year ago

There are three options I think, the third being that you can write the extension function code as integrated extension functions saxonica.com/html/documentation/extensibility/… and that way can make use of Java.

Michael Kay Over a year ago

I wonder if the XSDDateTimeFormatter is really doing anything that can't be done using the standard format-dateTime() function in XSLT 2.0/3.0?

Michael Kay Over a year ago

That sounds like if ($x castable as xs:dateTime) then format-dateTime(xs:dateTime($x)) else $x.

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