Empty array causes other parameter to be null
---------------------------------------------
Key: AXIS2-3398
URL: https://issues.apache.org/jira/browse/AXIS2-3398
Project: Axis 2.0 (Axis2)
Issue Type: Bug
Affects Versions: 1.3
Environment: Windows XP, Tomcat 5.5
Reporter: Stephan Rosner
Priority: Critical
Summary: I am trying to invoke the following method via Axis2
public void arrayFirst(String[] array, TwoStrings object)
Whenever the first parameter (array) is an empty String array (array = new
String[0];), the second object TwoStrings (which simply holds 2 Strings) is
always null on the server-side no matter what you put in on the client.
Detailed: The attached server.jar implements the following 2 methods:
public void arrayLast(TwoStrings object, String[] array)
public void arrayFirst(String[] array, TwoStrings object)
Both of these simply print out the contents of the given parameters. The
attached client.jar contains besides the generated stub the following 2 test
cases:
public class BugTest extends TestCase {
/**
* This does not work
* Output on server side is:
* --- arrayFirst ---
* array.length = 1
* stringarray[0] = ''
* object == null
*/
public void testArrayFirst() throws RemoteException {
String[] stringArray = new String[0];
TwoStrings twoStrings = new TwoStrings();
twoStrings.setFirstString("first");
twoStrings.setSecondString("second");
Axis2BugServiceStub stub = new Axis2BugServiceStub();
ArrayFirst arrayFirst = new ArrayFirst();
arrayFirst.setArray(stringArray);
arrayFirst.setObject(twoStrings);
stub.arrayFirst(arrayFirst);
}
/**
* This does work
* Output on server side is:
* --- arrayLast ---
* array.length = 0
* FirstString = first
* SecondString = second
*/
public void testArrayLast() throws RemoteException {
String[] stringArray = new String[0];
TwoStrings twoStrings = new TwoStrings();
twoStrings.setFirstString("first");
twoStrings.setSecondString("second");
Axis2BugServiceStub stub = new Axis2BugServiceStub();
ArrayLast arrayLast = new ArrayLast();
arrayLast.setArray(stringArray);
arrayLast.setObject(twoStrings);
stub.arrayLast(arrayLast);
}
}
Please note that in the JavaDocs of the methods I have included the printed out
results from the server. This means that in the first case, where the empty
array is used as the first parameter, Axis2 is thrown off so that the second
parameter (the TwoString) results to null on the server. When the empty array
is used as the second/last parameter things work as they should.
Now I can only speculate about the reason, but have noted that in none of these
2 cases the empty array shows up as a parameter within the SOAP-envelope. This
is the SOAP-envelope of the testArrayFirst() case:
<?xml version='1.0' encoding='utf-8'?>
<soapenv:Envelope xmlns:soapenv="http://www.w3.org/2003/05/soap-envelope";>
<soapenv:Body>
<ns2:arrayFirst xmlns:ns2="http://server.nullbug.axis2";>
<ns2:object>
<ns1:firstString
xmlns:ns1="http://server.nullbug.axis2/xsd";>first</ns1:firstString>
<ns1:secondString
xmlns:ns1="http://server.nullbug.axis2/xsd";>second</ns1:secondString>
</ns2:object>
</ns2:arrayFirst>
</soapenv:Body>
</soapenv:Envelope>
As a workaround we are currently setting the array explicitly to null, which
causes the array-parameter to show up within the SOAP-envelope and to transmit
correctly again.
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