Retrieving xpath in any xml type service

Hi,
We have any xml service type proxy which receives 2 different types of XML messages.In one of the XML messages,we need to branch out based on value of certain element.
But xpath doesn't seem to work.Xpath retrieved using messaging type service is:
*$body/ref:ONIXMessage/ref:Product/ref:RecordSourceType/text()*
This xpath works with messaging type service.
But when the same was used in any xml type service ,ALSB unable to recognize the namespace and hence the xpath was modified to:
*$body/ONIXMessage/Product/RecordSourceType/text()*
But this does not return anything.
Any idea as to how to get the data from xpath?
Thanks.
Arti

Hi,
You can add the namespace to use that in inline x-queries/x-path expressions. Please refer -
http://download.oracle.com/docs/cd/E13159_01/osb/docs10gr3/consolehelp/proxyeditors.html#wp1277819
Regards,
Anuj
Edited by: Anuj Dwivedi, Infosys on Aug 16, 2009 4:33 PM

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SK

XMLTypes in 10.1 are extremely slow and extremely buggy.
They're maginally better in 10.2 (with the exception of anything added in that release, most notably XQuery), although there are some disasterous bugs in 10.2 in functionality that was actually fine in 10.1 (e.g. memory leaks, scaling nightmares).
The XML Respository (required for XSD registration and shredding) is very unstable and will cause performance issues and instance outages.
This is on top of the intrinsic performance and volume inefficiencies involved with XML.
If you store data in a (column,row) of a SQL table it needs to be atomic with respect to the context of the database. Hiding information inside XML in a column of a table means your data is no longer even in 1st normal form. Surely we can all agree that is a Bad Idea and contrary to any concept of good practise, at this late stage.
Furthermore querying XML structures is complex, slow and inflexible due to the asymetric nature of hierarchies. And once your information is in it, you're stuck with the incompleteness of XPath and the inefficiency of XQuery. All the indices in the world won't save you.
More still, it is almost impossible, and very expensive to constrain the data in the XML other than trivial domain and "data type" constraints. The constraints require procedural validation and are not immediate. So you can kiss goodbye to referential integrity and consistency even if you figure out how to implement them.
Also "abstract clob" XMLType storage requires multiple full document copies for read consistency purposes, so you will cripple your instance and your storage overhead (typically rather kindly benchmarked at 3 times SQL volume) will exponentially run away.
Just don't do it.

XPath query error - xml extension in schema

Hi,
I am getting following error when i try to assign values to input xml payload before
invoke process.
"{http://schemas.xmlsoap.org/ws/2003/03/business-process/}selectionFailure" has been thrown.
<selectionFailure>
<part name="summary" >
<summary>XPath query string returns multiple nodes. According to BPEL4WS spec 1.1 section 14.3, The assign activity part and query /child::parameter/child::param1 should not return multipe nodes. Please check the BPEL source at line number "40" and verify the part and xpath query /child::parameter/child::param1. </summary>
</part>
</selectionFailure>
The generated XPath resolves to a single node only (tested using XMLSpy). The only reason i can think of is that the xml schema in wsdl is extending a base xml type to a new type.
It works fine if the extending xml type is merged with it's base type, and used as one single complex type.
------------------WSDL START
<?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns="http://schemas.xmlsoap.org/wsdl/" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:http="http://schemas.xmlsoap.org/wsdl/http/" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:mime="http://schemas.xmlsoap.org/wsdl/mime/" xmlns:tns="http://justdoit.ws.sunflower2.pageone.com" targetNamespace="http://justdoit.ws.sunflower2.pageone.com">
     <types>
          <xs:schema targetNamespace="http://justdoit.ws.sunflower2.pageone.com">
               <xs:complexType abstract="true" name="BaseObject">
                    <xs:sequence>
                         <xs:element name="param1" nillable="true" type="xs:string"/>
                         <xs:element name="param2" nillable="true" type="xs:string"/>
                    </xs:sequence>
               </xs:complexType>
               <xs:complexType name="FooBar">
                    <xs:complexContent>
                         <xs:extension base="tns:BaseObject">
                              <xs:sequence>
                                   <xs:element name="param3" nillable="true" type="xs:string"/>
                                   <xs:element name="param4" nillable="true" type="xs:string"/>
                                   <xs:element name="param5" nillable="true" type="xs:string"/>
                                   <xs:element name="param6" nillable="true" type="xs:string"/>
                              </xs:sequence>
                         </xs:extension>
                    </xs:complexContent>
               </xs:complexType>
          </xs:schema>
     </types>
     <message name="justDoItRequest">
          <part name="parameter" type="tns:FooBar"/>
     </message>
     <message name="justDoItResponse">
          <part name="parameter" type="tns:FooBar"/>
     </message>
     <portType name="justDoItPort">
          <operation name="justDoIt">
               <input message="tns:justDoItRequest"/>
               <output message="tns:justDoItResponse"/>
          </operation>
     </portType>
     <binding name="justDoItBinding" type="tns:justDoItPort">
          <soap:binding style="rpc" transport="http://schemas.xmlsoap.org/soap/http"/>
          <operation name="justDoIt">
               <soap:operation soapAction="tns:justDoIt"/>
               <input>
                    <soap:body use="literal"/>
               </input>
               <output>
                    <soap:body use="literal"/>
               </output>
          </operation>
     </binding>
     <service name="justDoItService">
          <port name="NewPort" binding="tns:justDoItBinding">
               <soap:address location="http://127.0.0.1:8080/axis/services/justDoIt"/>
          </port>
     </service>
</definitions>
------------------WSDL END
------------------BPEL START
          <assign name="assign-1">
               <copy>
                    <from variable="input" part="payload" query="/tns:justDoItRequest/tns:input1"></from>
                    <to variable="req" part="parameter" query="/parameter/param1"/>
               </copy>
          </assign>
          <invoke name="invoke-1" partnerLink="justDoIt" portType="tns:justDoItPort" operation="justDoIt" inputVariable="req" outputVariable="res"/>
------------------BPEL END
reg,
Amitoj.

I am also having the xml extension issue and since we are dealing with large WSDL files (exceed 40,000 lines) it would be ridiculous to move all extension classes to the base type (parent class). Has this bugged been looked at and when can it be resolved since it seems to be a major issue in JDeveloper.
Chris

How to create an XQuery for an XML type data source

Hi,
1.I have data contained in an XML format.
Hence I have created a physical data source for XML type data.
2.I have created a logical view to broker data from several disparate physical data sources.I have called this as UnifiedView.
3.I have created a function called getUnifiedView() to obtain data from all the physical sources
4.Upto this point, I have not faced any problems.
5.However when i try writing a simple XQuery for the physical XML datasource such as
$Sh-data/PublicIdentifiers/MSISDN="1234567"
I get result as (For example):
<HSS>
<MSISDN> 1234567 111111 222222 </MSISDN>
</HSS>
Could you please help me getting the where clause output?
I have attached the schema and XML files used for further information.
Regards
Vidya

Hi mReiche,
I later on resolved the previously mentioned error and try out the XQuery as suggested by you.
for $MSISDN in ns0:Sh-data()/PublicIdentifiers/MSISDN
where $MSISDN="1234567"
return
<HSS>
<MSISDN>{data($MSISDN)}</MSISDN>
</HSS>
It works! Thanks.
Now i am trying to retrieve data from 2 XML documents and an LDAP query.
I have the following data sources:
1.LDAP queried by Java Function
2.HSS xml
3.Presence xml
I want to match the telephoneNumber of the LDAP with MSISDN in the HSS.xml.
Next i want to match the SIP_URI in the HSS.xml with Contact of the Presence.xml
Given below is the XQuery which i have written to achieve the above:
for $x0 in ns5:FindDN($str_mailId)
for $Sh-Data in ns2:Sh-Data()
where $x0 = $Sh-Data/PublicIdentifiers/MSISDN
for $presence in ns3:presence()
where $Sh-Data/Sh-IMS-Data/SCSCFName = $presence/ns4:tuple/ns4:contact
return
On executing this XQuery i am getting the following error:
java.lang.NullPointerException: null
     at weblogic.xml.query.types.XQueryAtomicType.commonSuperTypeOf(XQueryAtomicType.java:150)
     at weblogic.xml.query.types.XQueryType.comparisonTypeOf(XQueryType.java:324)
     at weblogic.xml.query.runtime.compare.GeneralAtomicComparison.compare(GeneralAtomicComparison.java:50)
     at weblogic.xml.query.runtime.compare.ComparisonIterator.fetchNext(ComparisonIterator.java:50)
     at weblogic.xml.query.iterators.GenericIterator.next(GenericIterator.java:113)
     at weblogic.xml.query.runtime.logic.BoolEffValue.exec(BoolEffValue.java:51)
     at weblogic.xml.query.runtime.logic.BoolEffValue.fetchNext(BoolEffValue.java:47)
     at weblogic.xml.query.iterators.GenericIterator.next(GenericIterator.java:113)
     at weblogic.xml.query.runtime.core.IfThenElse.fetchNext(IfThenElse.java:79)
     at weblogic.xml.query.iterators.GenericIterator.next(GenericIterator.java:113)
     at weblogic.xml.query.runtime.core.CountMapIterator.fetchNext(CountMapIterator.java:162)
     at weblogic.xml.query.iterators.GenericIterator.next(GenericIterator.java:113)
     at weblogic.xml.query.runtime.core.CountMapIterator.fetchNext(CountMapIterator.java:162)
     at weblogic.xml.query.iterators.GenericIterator.next(GenericIterator.java:113)
     at weblogic.xml.query.runtime.sequences.Exists.fetchNext(Exists.java:40)
     at weblogic.xml.query.iterators.GenericIterator.next(GenericIterator.java:113)
     at weblogic.xml.query.runtime.core.IfThenElse.fetchNext(IfThenElse.java:79)
     at weblogic.xml.query.iterators.GenericIterator.next(GenericIterator.java:113)
     at weblogic.xml.query.runtime.core.LetIterator.fetchNext(LetIterator.java:133)
     at weblogic.xml.query.iterators.GenericIterator.next(GenericIterator.java:113)
     at weblogic.xml.query.runtime.core.LetIterator.fetchNext(LetIterator.java:133)
     at weblogic.xml.query.iterators.GenericIterator.next(GenericIterator.java:113)
     at weblogic.xml.query.runtime.querycide.QueryAssassin.fetchNext(QueryAssassin.java:54)
     at weblogic.xml.query.iterators.GenericIterator.peekNext(GenericIterator.java:151)
     at weblogic.xml.query.runtime.qname.InsertNamespaces.fetchNext(InsertNamespaces.java:161)
     at weblogic.xml.query.iterators.GenericIterator.next(GenericIterator.java:113)
     at weblogic.xml.query.runtime.core.QueryIterator.fetchNext(QueryIterator.java:127)
     at weblogic.xml.query.iterators.GenericIterator.hasNext(GenericIterator.java:134)
     at weblogic.xml.query.xdbc.util.Serializer.serializeItems(Serializer.java:142)
     at com.bea.ld.server.QueryInvocation.getResult(QueryInvocation.java:461)
     at com.bea.ld.EJBRequestHandler.executeFunction(EJBRequestHandler.java:346)
     at com.bea.ld.ServerBean.executeFunction(ServerBean.java:108)
Please find attached the XML documents which i am using.
Could you pls let me know how to resolve this.

(updating xml value)adding an element in an xml type column

Hi all,
i hava a table that contains an xml-Type column (non schema based)
i have inserted some data in it
table:(id,xmlcolumn)
ex:
insert into t1 values(1,'<Chapters>
<Chapter>ch1<Chapter>
<Chapter>ch2<Chapter>
</Chapters>')
i need to add a new Chapter: <Chapter>ch3</Chapter>
for the result of xml instance in the table to be:
<Chapters>
<Chapter>ch1<Chapter>
<Chapter>ch2<Chapter>
<Chapter>ch3<Chapter>
</Chapters>
plz if any one colud help

SQL> DECLARE
2      l_xml      XMLTYPE := XMLTYPE('<Chapters>
3 <Chapter>ch1</Chapter>
4 <Chapter>ch2</Chapter>
5 </Chapters>');
6      l_xsl      XMLTYPE;
7      l_new_node VARCHAR2(100) := '<Chapter>ch3</Chapter>';
8 BEGIN
9      dbms_output.put_line('Before adding node:');
10      dbms_output.put_line('----------------------------------------------------------------');
11      dbms_output.put_line(l_xml.getStringVal());
12      dbms_output.put_line('----------------------------------------------------------------');
13      l_xsl := XMLTYPE('<?xml version="1.0"?>' ||
14                       '<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"' ||
15                       ' version="1.0"' || ' result-ns=""' || ' indent="no">' ||
16                       '<xsl:output method="xml" media-type="text/xml" indent="no"/>' ||
17                       '<xsl:template match="/">' ||
18                           '<' ||l_xml.getRootElement() || '>' ||
19                               ' <xsl:for-each select="/' || l_xml.getRootElement() ||'/Chapter">' ||
20                                   '<xsl:copy-of select="." />' ||
21                               '</xsl:for-each>' ||
22                               l_new_node ||
23                           '</' || l_xml.getRootElement() || '>' ||
24                       '</xsl:template>' ||
25                       '</xsl:stylesheet>');
26      l_xml := l_xml.Transform(l_xsl);
27      dbms_output.put_line('After adding node:');
28      dbms_output.put_line('----------------------------------------------------------------');
29      dbms_output.put_line(l_xml.getStringVal());
30      dbms_output.put_line('----------------------------------------------------------------');
31 END;
32 /
Before adding node:
<Chapters>
<Chapter>ch1</Chapter>
<Chapter>ch2</Chapter>
</Chapters>
After adding node:
<Chapters>
<Chapter>ch1</Chapter>
<Chapter>ch2</Chapter>
<Chapter>ch3</Chapter>
</Chapters>
PL/SQL procedure successfully completed.
SQL>

Retrieving xpath in any xml type service

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