XSLT提取所有输入可能的xpath

I have really complex xsl (20 000 rows xsl file!) file which processes input file XML and makes output XML file. I would like to extract all input file xpaths which are possible processed in the xsl. So I would like somehow to have a extraction of all (input)xpaths which are concerned in the XSL. For that purpose I would like to find java API or tool which is able to give me this information with single passing of the XSL file. Are there such APIs or tools?I have really complex xsl (20 000 rows xsl file