Implemented basic ErrorHandler

* InputXSLT::ErrorHandler is derived from xercesc::ErrorHandler and enables contextual printing of transformation errors
** currently this means that the error messages passed to std::cerr contain the full path of the offending transformation
* added input trimming to the external transform function
** calls to this function from inside a transformation may contain unnecessary whitespace characters which disrupt further processing

1 files changed, 6 insertions, 4 deletions

diff --git a/src/function/transform.cc b/src/function/transform.cc
index fd28b34..06e4c19 100644
--- a/src/function/transform.cc
+++ b/src/function/transform.cc
@@ -4,6 +4,8 @@
 #include <xercesc/dom/DOMImplementation.hpp>
 #include <xercesc/dom/DOMElement.hpp>
 
+#include <boost/algorithm/string.hpp>
+
 #include "transformation_facade.h"
 #include "support/xerces_string_guard.h"
 #include "support/dom/result_node_facade.h"
@@ -14,13 +16,13 @@ xercesc::DOMDocument* FunctionTransform::constructDocument(
 	const InputXSLT::FilesystemContext& fsContext,
 	const FunctionBase::parameter_tuple& parameters
 ) {
-	const std::string transformationPath(
+	const std::string transformationPath(boost::trim_copy(
 		fsContext.resolve(std::get<0>(parameters)).string()
-	);
+	));
 
-	const std::string targetPath(
+	const std::string targetPath(boost::trim_copy(
 		fsContext.resolve(std::get<1>(parameters)).string()
-	);
+	));
 
 	const xalan::XObjectPtr& parameterObject(
 		std::get<2>(parameters)