Looping Over the Collection elements in the BPEL

Question

Hi Everybody,
Note:It appears this thread long paragraph but those are schems structures only.I am giving them to give full depth of my req.
1) First requirement :I have requirement wherein I have to retrieve the Data from Database adapter and modify it according to my requirements like below.
1) Input data from Database Adapter example: (Initial Schema)
<select_arrid_collection xmlns="http://xmlns.oracle.com/pcbpel/adapter/db/Select_Arrid">
<select_arrid>
<arr_id>arr1</arr_id>
</select_arrid>
<select_arrid>
<arr_id>arr2</arr_id>
</select_arrid>
<select_arrid>
<arr_id>arr1</arr_id>
</select_arrid>
<select_arrid>
<arr_id>arr2</arr_id>
</select_arrid>
</select_arrid_collection>
2) I am modifying to get the collection objects based on element same arr_id(If it is arr1,I have to get the all the elements related arr1 into one of the collection Object that is select_arrid_collection.Likewise for any arr_id ,it has to group them into a select_arrid_collection element) like below:
Modified schema:
<root xmlns="http://xmlns.oracle.com/pcbpel/adapter/db/Select_Arrid">
<select_arrid_collection>
<select_arrid>
<arr_id>arr1</arr_id>
</select_arrid>
<select_arrid>
<arr_id>arr1</arr_id>
</select_arrid>
</select_arrid_collection>
<select_arrid_collection>
<select_arrid>
<arr_id>arr2</arr_id>
</select_arrid>
<select_arrid>
<arr_id>arr2</arr_id>
</select_arrid>
</select_arrid_collection>
</root>
Note: root element is added in the schema that is why this modified xml has different namespace
I am using below xsl file to get the above schema to get the solution for first requirement:
<xsl:stylesheet version="2.0" xmlns:ns1="http://www.example.org" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="/">
<ns1:root>
<xsl:for-each-group select="*/ns1:Select_Arrid" group-by="ns1:Arr_id">
<xsl:sort select="current-grouping-key()">
<ns1:select_arrid_collection>
<xsl:copy-of select="current-group()">
<xsl:apply-templates/>
</xsl:copy-of>
</ns1:select_arrid_collection>
</xsl:sort>
</xsl:for-each-group>
</ns1:root>
</xsl:template>
</xsl:stylesheet>
2) Second requirement:
After getting the multiple collection elements(select_arrid_collection),I want to loop through each select_arrid_collection element and map the elements in that to another service schema.
I have created the xsd like above required modified schema and assign it to a variable(element type) which takes same modified schema so that I can have a variable on which I want to apply while activity.
But I want to have the idea how to loop through the multiple collection elements(select_arrid_collection) and map the elements of each select_arrid_collection to a input variable of a service.
My problem is I have to get each select_arrid_collection element in the schema where root element is 'root'.I am not able to trace how to get the no of select_arrid_collection elements so that I can loop through in the transofrm activity.
Can anybody help me put in this?
Edited by: 899283 on Jan 9, 2013 1:48 AM
Edited by: 899283 on Jan 9, 2013 1:52 AM
Edited by: 899283 on Jan 9, 2013 1:53 AM
Edited by: 899283 on Jan 9, 2013 2:02 AM

Answer 1

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