Implemented StylesheetParameterGuard class

* removes responsibility for clearing parameters from the generate member methods
* abstracts parameter escaping and setting and handles map conversion
* marked actual generate member method as private and added StylesheetParameterGuard reference argument
** "frontend" generate member methods instantiate a StylesheetParameterGuard instance and pass it to the actual generate method
** this enables central default parameter definition while offering the possibility for custom parameters

1 files changed, 7 insertions, 6 deletions

diff --git a/src/transformation_facade.h b/src/transformation_facade.h
index 4dc087b..3172daa 100644
--- a/src/transformation_facade.h
+++ b/src/transformation_facade.h
@@ -4,28 +4,29 @@
 #include <xalanc/XalanTransformer/XalanTransformer.hpp>
 
 #include <string>
-#include <unordered_map>
 
 #include "common.h"
+#include "support/stylesheet_parameter_guard.h"
 
 namespace InputXSLT {
 
 class TransformationFacade {
 	public:
-		typedef std::unordered_map<std::string, std::string> parameter_map;
-
-		TransformationFacade(const std::string&);
+		explicit TransformationFacade(const std::string&);
 		~TransformationFacade();
 
 		int generate(const std::string&);
-		int generate(const std::string&, const parameter_map&);
+		int generate(
+			const std::string&,
+			const StylesheetParameterGuard::map&
+		);
 
 	private:
 		const xalan::XalanCompiledStylesheet* transformation_;
 
 		xalan::XalanTransformer transformer_;
 
-		void setParameters(const parameter_map&);
+		int generate(const std::string&, StylesheetParameterGuard&);
 
 };