[jira] Created: (AXIS2-932) axis2 doesn't receive null values correctly

[Egor Samarkhanov (JIRA)]

axis2 doesn't receive null values correctly
-------------------------------------------

                 Key: AXIS2-932
                 URL: http://issues.apache.org/jira/browse/AXIS2-932
             Project: Apache Axis 2.0 (Axis2)
          Issue Type: Bug
          Components: databinding
    Affects Versions: 1.0
         Environment: Java services (axis2) and .NET client.
            Reporter: Egor Samarkhanov


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 class gets:

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

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

=============

I also tried to return the same array (with nulls) form the method
and axis made the following SOAP response:

<?xml version='1.0' encoding='utf-8'?>
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/";>
  <soapenv:Header />
  <soapenv:Body>
    <ns:testStringArrayWithNullsResponse xmlns:ns="http://org.apache.axis2/xsd";>
      <return>
      </return>
      <return>str</return>
      <return>
      </return>
      <return>str</return>
      <return>
      </return>
    </ns:testStringArrayWithNullsResponse>
  </soapenv:Body>
</soapenv:Envelope>

This response actually sends empty strings (and .NET client shows
them). To me the correct SOAP response should be as follows:

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


1. Axis2 should correctly handle nulls in requests and responses (shouldn't 
replace them
   with empty strings).

2. Java2WSDL should add nillable="true" to Object array elements automatically
   (probably not only to Object[] but to any "nullable" type).

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