Added ResultNodeFacade constructor overload for root nodes

* the common use case of ResultNodeFacade inside external function implementations is managing the result root node
** this root node can be fetched through the xercesc::DOMDocument instance
** the new alias overload automatically fetches the root node pointer and as such doesn't require a root node parameter
* changed external function implementations accordingly

1 files changed, 1 insertions, 5 deletions

diff --git a/src/function/read_file.cc b/src/function/read_file.cc
index cb1e57f..dcd32b7 100644
--- a/src/function/read_file.cc
+++ b/src/function/read_file.cc
@@ -65,11 +65,7 @@ DomDocumentCache::document_ptr FunctionReadFile::constructDocument(
 		DomDocumentCache::createDocument()
 	);
 
-	xercesc::DOMNode* const rootNode(
-		domDocument->getDocumentElement()
-	);
-
-	ResultNodeFacade result(domDocument.get(), rootNode, "file");
+	ResultNodeFacade result(domDocument.get(), "file");
 	result.setAttribute("path", filePath.string());
 
 	if ( boost::filesystem::is_regular_file(filePath) ) {