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Date: Fri, 8 Sep 2006 17:19:24 -0700 (PDT)
From: "Derek Foster (JIRA)" <jira@apache.org>
To: axis-dev@ws.apache.org
Subject: [jira] Created: (AXIS2-1129) Doubled wrapper elements around
 XMLBeans-generated XML
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Doubled wrapper elements around XMLBeans-generated XML
------------------------------------------------------

                 Key: AXIS2-1129
                 URL: http://issues.apache.org/jira/browse/AXIS2-1129
             Project: Apache Axis 2.0 (Axis2)
          Issue Type: Bug
          Components: client-api, core, databinding, om, wsdl
    Affects Versions: 1.0
            Reporter: Derek Foster
            Priority: Critical


I recently noticed a big problem in how Axis2 generates XML for  XMLBeans objects. It appears to be creating the wrapper element around
an XMLBean twice, thus generating erroneous XML for a SOAP message. This appears to be a big problem that would affect a lot of web services, and is making it impossible for my company to use Axis2 to talk to our server.

This error was found in the latest nightly build (September 8), but has apparently been around for some time.

I have a particular WSDL, as follows:

<?xml version="1.0" encoding="UTF-8"?>

<definitions name="FDefinitions"
   targetNamespace="http://www.c-corp.com/wsdl/2004-10-01/F"
   xmlns:tns="http://www.c-corp.com/wsdl/2004-10-01/F"
   xmlns:c="http://www.c-corp.com/wsdl/2004-10-01/c"
   xmlns:F="http://www.dummy-temp-address"
   xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"
   xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"
   xmlns:xs="http://www.w3.org/2001/XMLSchema"
   xmlns="http://schemas.xmlsoap.org/wsdl/">

   <types>
      <xs:schema targetNamespace="http://www.c-corp.com/wsdl/2004-10-01/F">
         <xs:import namespace="http://www.dummy-temp-address" schemaLocation="F.xsd"/>
         <xs:element name="return" type="xs:string"/>
         <xs:element name="failure" type="xs:string"/>
      </xs:schema>
      <xs:schema targetNamespace="http://www.c-corp.com/wsdl/2004-10-01/c">
         <xs:element name="CPassword" type="xs:string"/>
         <xs:element name="CLogin" type="xs:string"/>
      </xs:schema>
   </types>

   <message name="FEvent">
      <part name="contents" element="F:full"/>
   </message>

   <message name="FResponse">
      <part name="return" element="tns:return"/>
   </message>

   <message name="CPassword">
      <part name="CPassword" element="c:CPassword"/>
   </message>

   <message name="CLogin">
      <part name="CLogin" element="c:CLogin"/>
   </message>

   <message name="Failure">
      <part name="faultDetail" element="tns:failure"/>
   </message>

   <portType name="FPortType">
      <documentation>F Port Type</documentation>

      <operation name="acceptFEvent" parameterOrder="contents">
         <input name="acceptFEventRequest" message="tns:FEvent"/>
         <output name="acceptFEventResponse" message="tns:FResponse"/>
         <fault name="Failure" message="tns:Failure"/>
      </operation>
   </portType>

   <binding name="FSoapBinding" type="tns:FPortType">
      <documentation>F Soap Binding</documentation>
      <soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http"/>

      <operation name="acceptFEvent">
         <soap:operation soapAction="acceptFEventAction"/>
         <input>
            <soap:header message="tns:CLogin" part="CLogin" use="literal"/>
            <soap:header message="tns:CPassword" part="CPassword" use="literal"/>
            <soap:body use="literal"/>
         </input>
         <output>
            <soap:body use="literal"/>
         </output>
         <fault name="Failure">
            <soap:fault name="Failure" use="literal"/>
         </fault>
      </operation>
   </binding>

   <service name="FService">
      <documentation>F Web Service</documentation>
      <port name="FPort" binding="tns:FSoapBinding">
         <soap:address location="http://localhost:8080/axis/services/FService"/>
      </port>
   </service>
</definitions>

My WSDL references the following XML schema:

<?xml version="1.0" encoding="UTF-8"?>

<xs:schema targetNamespace="http://www.dummy-temp-address"
           xmlns="http://www.dummy-temp-address"
           xmlns:xs="http://www.w3.org/2001/XMLSchema"
           xmlns:c="http://www.c-corp.com/schemas/c/schema_annotation"

           elementFormDefault="unqualified"
           attributeFormDefault="unqualified"
           version="DRAFT">

   <xs:element name="full" type="Full"/>

   <xs:complexType name="Full">
      <xs:sequence>
         <xs:element name="message-header" type="MessageHeader"/>
         <xs:element name="event-reference" type="EventReference"/>
         <xs:any/>
      </xs:sequence>
   </xs:complexType>

   <xs:complexType name="MessageHeader">
      <xs:sequence>
         <xs:any/>
      </xs:sequence>
   </xs:complexType>

   <xs:complexType name="EventReference">
      <xs:sequence>
         <xs:element name="event-id" type="xs:string"/>
         <xs:element name="update" type="xs:unsignedInt"/>
         <xs:element name="response-plan-id" type="xs:string" minOccurs="0"/>
      </xs:sequence>
   </xs:complexType>
</xs:schema>

After running WSDL2Java to generate the appropriate classes, I am using the following code to generate and transmit a client message to my SOAP server:

   protected ReturnDocument executeTest (
      final String targetEndpoint,
      final CLoginDocument login,
      final CPasswordDocument password )
      throws Exception
   {
      final FServiceStub service = new FServiceStub( null, targetEndpoint );
      final Options options = service._getServiceClient().getOptions();
      options.setProperty( org.apache.axis2.transport.http.HTTPConstants.CHUNKED, Boolean.FALSE );
      service._getServiceClient().setOptions( options );
      final FullDocument full = Full.Factory.newInstance();
      full.setFull( getSituation() );
      return service.acceptFEvent( full, login, password );
   }

   private Full getSituation ()
      throws XmlException
   {
      return Full.Factory.parse(
         "   <full xmlns=\"http://www.dummy-temp-address\">\n" +
            "      <message-header>\n" +
... and so forth: see output for the rest of this string ...
            "      </details>\n" +
            "   </full>\n" );
   }


When I execute the above code, I get the following message sent to my server:

POST /axis2/services/FService HTTP/1.1
SOAPAction: acceptFEventAction
User-Agent: Axis2
Host: 127.0.0.1
Content-Length: 8785
Content-Type: text/xml; charset=UTF-8

<?xml version='1.0' encoding='UTF-8'?><soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"><soapenv:Header><CLogin xmlns="http://www.c-corp.com/wsdl/2004-10-01/c">admin</CLogin></soapenv:Header><soapenv:Body><full xmlns="http://www.dummy-temp-address"><full>
      <message-header>
         <sender>
            <organization-id>QSenderOrganizationID</organization-id>
            <center-id>QSenderCenterID</center-id>
         </sender>
         <message-type-version>1</message-type-version>
         <message-number>435</message-number>
         <message-time-stamp>
            <date>20040625</date>
            <time>201225</time>
            <utc-offset>-0400</utc-offset>
         </message-time-stamp>
         <message-expiry-time>
            <date>20040625</date>
            <time>221222</time>
            <utc-offset>-0400</utc-offset>
         </message-expiry-time>
      </message-header>
      <event-reference>
         <event-id>1234</event-id>
         <update>1</update>
      </event-reference>
      <event-indicators>
         <event-indicator>
            <priority>4</priority>
         </event-indicator>
      </event-indicators>
      <headline>
         <headline>
            <incident>accident</incident>
         </headline>
      </headline>
      <details>
      </details>
   </full></full></soapenv:Body></soapenv:Envelope>

Note that there is a doubled 'full' element in the output (one inside the other). There should be only one level of 'full', but there are two,
one inside the other. This is very wrong, and is unsurprisingly rejected by my server.

Calling toString() on the results of getSituation() returns the string that was passed into the Factory.parse() method as I would expect.

Calling toString() on the FullDocument instance results in two levels of 'full', not one as it should.

It occurred to me that maybe I should not be including a declaration for 'full' in the string passed to Factory.parse() (note that there is no documentation as to what should be passed into Factory.parse(),making it difficult to interpret), so I tried omitting the outer 'full' tag and its close tag, and just included the elements that it contains. However, when doing this, I got errors from the parse method complaining
that there was more than one element present in the string being parsed. So although it seems to be possible to generate correct XML via this method as long as there is only a single child element of the 'full' element, this is not an acceptable solution in my case.

I tried changing the declaration of the 'full' element so that it had minOccurs=0 maxOccurs="unbounded". This caused WSDL2Java to declare the type of it as an array rather than a single instance. However, this merely meant that each element in the array was surrounded by two 'full' tags, rather than one.

This seems to me to be a fairly blatant error which would affect almost all use of XMLBeans binding. I would like to have this considered
a blocker for Axis 1.1. 

Derek


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