Implemented support for modifying external function base path

* one expects a read-file function to work relative to the directory the transformation is located and not to the executable's location
** from the perspective of the user the transformation is the application, not the actual executable
* removed PlattformGuard struct from TransformerGuard (now TransformerFacade)
* TransformerFacade is instatiated with the appropriate relative working path
** i.e. it will have to be instantiated for every directory containing one or more transformations

1 files changed, 66 insertions, 0 deletions

diff --git a/src/transformer_facade.cc b/src/transformer_facade.cc
new file mode 100644
index 0000000..be2a6a2
--- /dev/null
+++ b/src/transformer_facade.cc
@@ -0,0 +1,66 @@
+#include "transformer_facade.h"
+
+#include <xalanc/Include/PlatformDefinitions.hpp>
+#include <xercesc/util/PlatformUtils.hpp>
+
+#include <xalanc/XSLT/XSLTInputSource.hpp>
+#include <xalanc/XalanTransformer/XalanTransformer.hpp>
+#include <xalanc/XalanTransformer/XercesDOMWrapperParsedSource.hpp>
+#include <xalanc/XercesParserLiaison/XercesDOMSupport.hpp>
+
+#include <xercesc/dom/DOMDocument.hpp>
+#include <xercesc/dom/DOMImplementation.hpp>
+
+#include "function/read_file.h"
+#include "function/read_xml_file.h"
+
+namespace InputXSLT {
+
+TransformerFacade::TransformerFacade(const std::string& path):
+	parser_(),
+	transformer_() {
+	const xalan::XalanDOMString customNamespace(
+		"http://ExternalFunction.xalan-c++.xml.apache.org"
+	);
+
+	this->transformer_.installExternalFunction(
+		customNamespace,
+		xalan::XalanDOMString("read-file"),
+		InputXSLT::FunctionReadFile(path)
+	);
+
+	this->transformer_.installExternalFunction(
+		customNamespace,
+		xalan::XalanDOMString("read-xml-file"),
+		InputXSLT::FunctionReadXmlFile(path)
+	);
+
+}
+
+int TransformerFacade::execute(
+	const std::string& transformation,
+	const std::string& target
+) {
+	xercesc::DOMDocument* inputDom(
+		xercesc::DOMImplementation::getImplementation()->createDocument()
+	);
+	xalan::XercesDOMSupport domSupport(this->parser_);
+
+	xalan::XercesDOMWrapperParsedSource parsedInput(
+		inputDom,
+		this->parser_,
+		domSupport,
+		xalan::XalanDOMString("")
+	);
+
+	xalan::XSLTInputSource transform(transformation.data());
+	xalan::XSLTResultTarget output(target.data());
+
+	return this->transformer_.transform(
+		parsedInput,
+		transform,
+		output
+	);
+}
+
+}