Replaced FunctionTransform by making the target of FunctionGenerate optional

* if the target parameter is not provided FunctionGenerate now performs exactly the same functionality as FunctionTransform
* added "boost::optional<boost::filesystem::path>" specialization to the XObjectValue class
* modified test cases accordingly
* modified README.md accordingly

1 files changed, 11 insertions, 0 deletions

diff --git a/src/support/type/xobject_value.cc b/src/support/type/xobject_value.cc
index 2fe4f9f..959da94 100644
--- a/src/support/type/xobject_value.cc
+++ b/src/support/type/xobject_value.cc
@@ -52,6 +52,17 @@ boost::filesystem::path XObjectValue::get<boost::filesystem::path>(
 }
 
 template <>
+boost::optional<boost::filesystem::path>
+XObjectValue::get<boost::optional<boost::filesystem::path>>(
+	const xalan::XObjectPtr& ptr) const {
+	if ( ptr.null() ) {
+		return boost::optional<boost::filesystem::path>();
+	} else {
+		return this->get<boost::filesystem::path>(ptr);
+	}
+}
+
+template <>
 xalan::XObjectPtr XObjectValue::get<xalan::XObjectPtr>(
 	const xalan::XObjectPtr& ptr) const {
 	return ptr;