[xquery-talk] ddxq external java function question

[Carlo Innocenti]

Product specific questions are better asked on our developer forum 
(http://forums.datadirect.com/ddforums/forum.jspa?forumID=9).

The problem in your case is with the declaration of the XQuery 
function, which should use "xs:int", instead of "xs:integer" for its arguments.

See more details about mapping of Java types to XML types in the 
context of DataDirect XQuery Java extension functions at: 
http://media.datadirect.com/download/docs/ddxquery/allddxq/reference/functions2.html#wp214238

Hope this helps,
Minollo


At 11:54 AM 6/26/2007, Charlie wrote:
>Hi,
>
>I am trying to use datadirect external java functions.
>
>The bottom are the files from other websites. I
>compiled the java to the class file under the same
>folder as .xq and .xml. When I have the classpath
>setup but got the error msg from the following
>command:
>
>java com.ddtek.xquery.Query -s IntDate.xml IntDate.xq
>
>XQQueryException: [DataDirect][XQuery]Error at line 9,
>column 57. Static error during resolving of external
>Java function. No matching Java external function
>found for 'IntDate:getDate(xs:integer, xs:integer,
>xs:integer, xs:string)'. [Call stack: ext:getDate at 9.8]
>    Line:          9
>    Column:        57
>    VendorCode:    EJF0002
>
>
>==============
>IntDate.xml:
>
><?xml version="1.0"?>
><doc>
>         <date year="1997" month="5" day="7"
>format="EEEE, MMMM dd (D), yyyy z"/>
>         <date year="1998" month="1" day="10"
>format="MMM d, yy"/>
>         <date year="1999" month="2" day="5"
>format="EE, MMM dd, yyyy"/>
></doc>
>
>==============
>IntDate.xq:
>
>declare namespace ext = "ddtekjava:IntDate";
>declare function ext:getDate($year as xs:integer,
>                              $month as xs:integer,
>                              $day as xs:integer,
>                              $format as xs:string)
>                      as xs:string external;
>
>for $date in /doc/date
>return
>ext:getDate($date/@year,$date/@month,$date/@day,$date/@format)
>
>==============
>IntDate.java
>
>import java.util.Date;
>import java.util.Calendar;
>import java.text.SimpleDateFormat;
>
>public class IntDate
>{
>    public static void main (String[] args) {
>       System.out.println(getDate(1939, 12, 5, "EEEE,
>MMMM dd (D), yyyy z") );
>    }
>
>    public static String getDate(int year, int month,
>int day, String format)
>    {
>        Calendar c = Calendar.getInstance();
>        c.set((int)year,(int)month,(int)day);
>        SimpleDateFormat dateFormat = new
>SimpleDateFormat(format);
>        return dateFormat.format(c.getTime());
>     }
>}
>
>
>
>
>
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