DO NOT REPLY [Bug 14140] New: - getNamespacePrefixes of MessageElement throws a NullPointerException if no namespaces have been declared.

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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=14140

getNamespacePrefixes of MessageElement throws a NullPointerException if no namespaces have been declared.

           Summary: getNamespacePrefixes of MessageElement throws a
                    NullPointerException if no namespaces have been
                    declared.
           Product: Axis
           Version: 1.0
          Platform: Other
        OS/Version: Other
            Status: NEW
          Severity: Normal
          Priority: Other
         Component: Serialization/Deserialization
        AssignedTo: axis-dev@xml.apache.org
        ReportedBy: chrisw@wolfram.com


When getNamespacePrefixes() is called on a MessageElement and there are no 
namespaces registered, a NullPointerException is thrown.  This method should 
probably return an empty Iterator or null. 

Example....

### GetNamespacePrefixesTest.java ###

import org.apache.axis.message.MessageElement;
import java.util.Iterator;

public class GetNamespacePrefixesTest
{
  public GetNamespacePrefixesTest()
  {
  }
  
  public static void main(String[] args)
  { 
    try
    {
      MessageElement me = 
        new MessageElement("http://www.wolfram.com","Test");
      Iterator it = me.getNamespacePrefixes();
      while(it.hasNext())
      { 
        String prefix = (String)it.next();
        System.out.println(prefix + ":" + me.getNamespaceURI(prefix));
      }
    }
    catch(Exception e)
    {
      e.printStackTrace();
    }
  }
}

Result ...

java.lang.NullPointerException
        at org.apache.axis.message.MessageElement.getNamespacePrefixes
(MessageElement.java:1021)
        at GetNamespacePrefixesTest.main(GetNamespacePrefixesTest.java:16)