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, 36 insertions, 0 deletions

diff --git a/src/support/stylesheet_parameter_guard.cc b/src/support/stylesheet_parameter_guard.cc
new file mode 100644
index 0000000..f82c2d5
--- /dev/null
+++ b/src/support/stylesheet_parameter_guard.cc
@@ -0,0 +1,36 @@
+#include "stylesheet_parameter_guard.h"
+
+namespace InputXSLT {
+
+StylesheetParameterGuard::StylesheetParameterGuard(
+	xalan::XalanTransformer& transformer
+): transformer_(transformer) { }
+
+StylesheetParameterGuard::StylesheetParameterGuard(
+	xalan::XalanTransformer& transformer,
+	const map& parameters
+): transformer_(transformer) {
+	this->set(parameters);
+}
+
+StylesheetParameterGuard::~StylesheetParameterGuard() {
+	this->transformer_.clearStylesheetParams();
+}
+
+void StylesheetParameterGuard::set(const map& parameters) {
+	for ( auto&& parameter : parameters ) {
+		this->set(parameter.first, parameter.second);
+	}
+}
+
+void StylesheetParameterGuard::set(
+	const std::string& key,
+	const std::string& value
+) {
+	this->transformer_.setStylesheetParam(
+		key.data(),
+		std::string("'" + value + "'").data()
+	);
+}
+
+}