Implemented custom xercesc::DOMDocument deleter

* pointers to xercesc::DOMDocument were manually released
** this is now solved using a custom deleter for the appropriate std::unqiue_ptr template specialization
* added matching factory method to DomDocumentCache
* updated external function implementations accordingly
** "constructDocument" is now expected to return a DomDocumentCache::document_ptr instance
* updated TransformerFacade accordingly
* this change was implemented to get rid of the manual memory management required by xalan / xerces

1 files changed, 1 insertions, 1 deletions

diff --git a/src/function/external_text_formatter.h b/src/function/external_text_formatter.h
index 4a2fb7e..23e6ab9 100644
--- a/src/function/external_text_formatter.h
+++ b/src/function/external_text_formatter.h
@@ -18,7 +18,7 @@ class FunctionExternalTextFormatter : public FunctionBase<
 	protected:
 		friend FunctionBase;
 
-		xercesc::DOMDocument* constructDocument(
+		DomDocumentCache::document_ptr constructDocument(
 			boost::filesystem::path,
 			std::string
 		);