Call setter only after object has been populated

This closes #266

Author: kwin

modello-plugins/modello-plugin-xpp3/src/main/java/org/codehaus/modello/plugin/xpp3/Xpp3ReaderGenerator.java

@@ -870,7 +870,7 @@ private void processField( ModelField field, XmlFieldMetadata xmlFieldMetadata,
                     if ( locationTracker != null )
                     {
                         sc.add( locationTracker.getName() + " " + LOCATION_VAR + "s;" );
-                        writeNewSetLocation( field, objectName, LOCATION_VAR + "s", sc );
+                        writeNewLocation( LOCATION_VAR + "s", sc );
                     }
 
                     if ( xmlAssociationMetadata.isMapExplode() )
@@ -954,7 +954,7 @@ private void processField( ModelField field, XmlFieldMetadata xmlFieldMetadata,
                         sc.unindent();
                         sc.add( "}" );
                     }
-
+                    writeSetLocation( field, objectName, LOCATION_VAR + "s", sc );
                     sc.unindent();
                     sc.add( "}" );
                 }
@@ -1659,6 +1659,11 @@ private String buildNewLocation( String source )
             + ( ( sourceTracker != null ) ? ", " + source : "" ) + " )";
     }
 
+    private void writeSetLocation( ModelField field, String objectName, String trackerVariable, JSourceCode sc )
+    {
+        writeSetLocation( "\"" + field.getName() + "\"", objectName, trackerVariable, sc );
+    }
+
     private void writeSetLocation( String key, String objectName, String trackerVariable, JSourceCode sc )
     {
         if ( locationTracker == null )