ElemApplyTemplates implementation

[Tomas Studva]

Hi,
I am developing an incremental(not in meaning as is Xalan) XSLT
processor called
Darwin(http://tstudva.googlepages.com/darwin-anincrementalxsltprocessor),
based on Xalan trunk.
I have some questions about Xalan implementation details. As I
understand every template element has execute method, which is called to
execute template element including children (direct). But sometimes
there is a difference.
1,
In ElemApplyTemplates when matching node against template there is code
case DTM.TEXT_NODE:
                                               // if(rth.m_elemIsPending ||
                                               // rth.m_docPending)
                                               // rth.flushPending(true);
                                               transformer

.pushPairCurrentMatched(


sroot


.getDefaultTextRule(),


child);
                                               transformer

.setCurrentElement(sroot


.getDefaultTextRule());
                                               //
dtm.dispatchCharactersEvents(child,
                                               // chandler,
false);

dtm.dispatchCharactersEvents(
                                                               child, rth,
                                                               false);

transformer.popCurrentMatched();
                                               continue;

There is some default template, sroot.getDefaultTextRule(), but it is
not executed and instead direct call to
dtm.dispatchCharactersEvents(child, rth,false); is performed.
Why?(optimization?)

2, In ElemApplyTemplates after template is found, is set on stacks and
so on and params are processed, follows code with comment
// And execute the child templates.
// Loop through the children of the template,
// calling execute on
// each of them.
for (ElemTemplateElement t = template.m_firstChild; t != null; t =
t.m_nextSibling) {
                                       xctxt.setSAXLocator(t);
                                       try {
                                               transformer

.pushElemTemplateElement(t);
                                               t.execute(transformer,
null);
                                       } finally {
                                               transformer

.popElemTemplateElement();
                                       }
                               }
which directly executes children of matched template insted of executing
template. Why?

PS:Same mail I have sent on xalan dev mailing list, but I haven't 
received any response.

Thanks for help, Xalan fan :) Tomas Studva