For-Each processing problem

MargateFan · May 11th, 2006, 10:48 AM

Is there a way of "breaking out" of a for-each loop (some sort of Leave instruction)?

I'm processing a set of nodes and doing a test to only pickup a certain condition, however once this condition has been fulfilled I don't wan't to continue checking in case it the condition is true again.

Code:

                <xsl:for-each select="//BookingFareData/BookingData/SeatSegment">
                  <xsl:if test="FlightNbr = $ASFlightNbr and DepartureDate = $ASDate">
                    <xsl:element name="SeatData">
                      <xsl:element name="SeatNumber">
                        <xsl:value-of select="SeatLocation"/>
                      </xsl:element>
                      <xsl:element name="SeatStatus">
                        <xsl:value-of select="SeatStatusCode"/>
                      </xsl:element>
                    </xsl:element>
                 </xsl:if>
                </xsl:for-each>

As always - thanks in advance

joefawcett · May 11th, 2006, 11:19 AM

Perhaps you could narrow down the initial node set?

Code:

<xsl:for-each select="(//BookingFareData/BookingData/SeatSegment[FlightNbr = $ASFlightNbr and DepartureDate = $ASDate])[1]">

--

Joe (Microsoft MVP - XML)

mhkay · May 11th, 2006, 11:39 AM

You have to think of a for-each as processing all the elements in parallel rather than in series: there is no way the processing of one element can affect any of the others. If you need to process them sequentially, the answer is to use recursion: write a recursive template (or in 2.0 a function) that takes the list of elements as a parameter, deals with the first one, and then calls itself to handle the rest.

Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference