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, 14 insertions, 1 deletions

diff --git a/src/support/dom/document_cache.h b/src/support/dom/document_cache.h
index 1f9a9e3..3aeb332 100644
--- a/src/support/dom/document_cache.h
+++ b/src/support/dom/document_cache.h
@@ -14,10 +14,23 @@
 namespace InputXSLT {
 
 class DomDocumentCache {
+	class document_deleter {
+		friend std::unique_ptr<xercesc::DOMDocument, document_deleter>;
+
+		void operator()(xercesc::DOMDocument*);
+	};
+
 	public:
+		typedef std::unique_ptr<
+			xercesc::DOMDocument,
+			document_deleter
+		> document_ptr;
+
+		static document_ptr createDocument();
+
 		DomDocumentCache();
 
-		xalan::XalanDocument* create(xercesc::DOMDocument*);
+		xalan::XalanDocument* create(document_ptr&&);
 
 	private:
 		class item;