WSD2J: How to create a method(A a) where A is implemented either by B or C ?

[Fabien Guinet]

Hello,

The goal is to define a single method which could be interpreted differently
on the server side depending on the object used (B or C).
For example, I would like to define a type UserIdentifier which could be
either a PhoneNumber or a MailAddress. I try to do this with the following
types definition:

        <xsd:element name="UserIdentifier" type="PhoneNumber, MailAddress"/>
        <xsd:complexType name="PhoneNumber">
           <xsd:attribute name="PhoneNumber" type="xsd:string"
use="optional"/>
        </xsd:complexType>
        <xsd:complexType name="MailAddress">
           <xsd:element name="MailAddress" type="xsd:string"/>
        </xsd:complexType>

But when I'm creating my message with:

<message name="sendRequest">
  <part name="userId"  type="UserIdentifier"/>
</message>

And when I'm running WSDL2J, I get the following error:

java.io.IOException: Type {urn:common}PhoneNumber is referenced but not
defined.
at
org.apache.axis.wsdl.symbolTable.SymbolTable.checkForUndefined(SymbolTable.j
ava:496)
...

Is there an error in my type definition ? Is this the good way to reach the
targeted behaviour ?

In advance, many thanks for your help (because I'm a little bit lost :),

Fabien