[Axis2] Problem with String[] and null elements in it

[Egor Samarkhanov]

Hello !

I created a simple service with the following method:

public String[] testStringArrayWithNulls( String[] sarray )
{
  return sarray;
}

Then I generated WSDL file (Java2WSDL) and got the following types in
it:

<xs:element name="testStringArrayWithNulls">
  <xs:complexType>
    <xs:sequence>
      <xs:element minOccurs="0" type="xs:string" name="sarray" 
maxOccurs="unbounded"/>
    </xs:sequence>
  </xs:complexType>
</xs:element>
<xs:element name="testStringArrayWithNullsResponse">
  <xs:complexType>
    <xs:sequence>
      <xs:element minOccurs="0" type="xs:string" name="return" 
maxOccurs="unbounded"/>
    </xs:sequence>
  </xs:complexType>
</xs:element>


Then I added nillable="true" attribute manually to each item (to make .NET send
nulls in SOAP), so the types are:

<xs:element name="testStringArrayWithNulls">
  <xs:complexType>
    <xs:sequence>
      <xs:element minOccurs="0" type="xs:string" name="sarray" 
maxOccurs="unbounded" nillable="true"/>
    </xs:sequence>
  </xs:complexType>
</xs:element>
<xs:element name="testStringArrayWithNullsResponse">
  <xs:complexType>
    <xs:sequence>
      <xs:element minOccurs="0" type="xs:string" name="return" 
maxOccurs="unbounded"  nillable="true"/>
    </xs:sequence>
  </xs:complexType>
</xs:element>

Then I deployed this service and tested it with a simple .NET client
that sends the following array (the operation is document/literal):

[null, "str", null, "str", null]

The SOAP message from .NET is as follows:

<?xml version='1.0' encoding='utf-8'?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"; 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; 
xmlns:xsd="http://www.w3.org/2001/XMLSchema";>
  <soap:Body>
    <testStringArrayWithNulls xmlns="http://org.apache.axis2/xsd";>
      <sarray xsi:nil="true" />
      <sarray>str</sarray>
      <sarray xsi:nil="true" />
      <sarray>str</sarray>
      <sarray xsi:nil="true" />
    </testStringArrayWithNulls>
  </soap:Body>
</soap:Envelope>

But for some reason my service gets:

["", "str", "", "str", ""]

All null values in the array are replaced with empty strings :(

So, I have two questions:

1. Why Axis replaces nulls with empty strings when the nulls are
   marked with xsi:nil="true" attribute in SOAP message? Is this a
   bug?

2. Why Java2WSDL doesn't add nillable="true" to Object array elements
   automatically?

------------------------------------
Best regards,
Egor Samarkhanov ([EMAIL PROTECTED])
Actimind, Inc.


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