TransportUtils NullPointerException When Logger Category is DEBUG
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                 Key: AXIS2-3411
                 URL: https://issues.apache.org/jira/browse/AXIS2-3411
             Project: Axis 2.0 (Axis2)
          Issue Type: Bug
          Components: kernel
    Affects Versions: 1.3
         Environment: Windows XP, Eclipse3.2
            Reporter: Owen Tong
            Priority: Minor


When trying the RESTClient, a NullPointerException would be thrown out from 
TransportUtils if Logger category is set as "DEBUG".  This was caused by the 
following code starting at line 154:
......
            Builder builder = BuilderUtil.getBuilderFromSelector(type, 
msgContext);
            if (log.isDebugEnabled()) {
                log.debug("createSOAPEnvelope using Builder (" + 
                          builder.getClass() + ") selected from type (" + type 
+")");
            }
            if (builder != null) {
                documentElement = builder.processDocument(inStream, 
contentType, msgContext);
            }
......
At line 154, the builder could be null.  If the DEBUG log is enabled at the 
same time, the "builder.getClass() will throw NullPointerException.

The logging code should be moved inside "if(builder!=null){".


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