SOAPFaultException: IllegalArgumentException: Decoding tip

As part of my ongoing work on the SOA and SCA (Society of Confused Architects) bandwagon, I have a new not-so-easy error to explain and share with you.

Here is how the error will reads from the client side, when using Oracle Web Services tech Stack on the 10gR3 releases:
javax.xml.rpc.soap.SOAPFaultException: Caught exception while handling request:
deserialization error: java.lang.IllegalArgumentException


The SOAP response will look something like that:

 1  <?xml version = '1.0' encoding = 'UTF-8'?>
 2  <env:Envelope xmlns:env="http://schemas.xmlsoap.org/soap/envelope/">
 3     <env:Body>
 4        <env:Fault>
 5           <faultcode>env:Client</faultcode>
 6           <faultstring>Caught exception while handling request: deserialization
 7                        error: java.lang.IllegalArgumentException</faultstring>
 8        </env:Fault>
 9     </env:Body>
10  </env:Envelope>



In my case, the error was just because I was having an invalid value
for some XML Schema type - the incomming value was not in the set
defined in the schema.


 1  <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
 2             xmlns:tns="http://ws.rajkovic.org/samples"
 3             targetNamespace="http://ws.rajkovic.org/samples"
 4             elementFormDefault="qualified"
 5             attributeFormDefault="unqualified">
 6  ...
 7        <xs:simpleType name="TitleType">
 8          <xs:restriction base="xs:string">
 9            <xs:enumeration value="Company"/>
10            <xs:enumeration value="Mr."/>
11            <xs:enumeration value="Ms."/>
12          </xs:restriction>
13        </xs:simpleType>
14        <xs:element name="title" type="tns:TitleType"/>
15  ...
16  </xs:schema>



Hope it can help some of you out there, getting to the bottom
of your interoperability issues faster.

-Ecco

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