Implemented basic external "write-file" function

* accepts a path parameter and the content to be written
* removed target parameter form FunctionTransform
** transformation result is now returned as a string
*** nodeset return value is planned
** e.g. writing the result to the fs is optional and has to be achieved using FunctionWriteFile
* changed "transform" test case accordingly
* this marks a paradigm shift and is the continuation of the changes described in 741a70f
** InputXSLT now also implements a output function
* added basic io error handling to FunctionReadFile

1 files changed, 62 insertions, 0 deletions

diff --git a/src/function/write_file.cc b/src/function/write_file.cc
new file mode 100644
index 0000000..39495d8
--- /dev/null
+++ b/src/function/write_file.cc
@@ -0,0 +1,62 @@
+#include "write_file.h"
+
+#include <xercesc/dom/DOMDocument.hpp>
+#include <xercesc/dom/DOMImplementation.hpp>
+#include <xercesc/dom/DOMElement.hpp>
+
+#include <boost/filesystem.hpp>
+#include <boost/filesystem/fstream.hpp>
+
+#include "support/xerces_string_guard.h"
+#include "support/dom/result_node_facade.h"
+
+namespace {
+
+bool writeFile(
+	const boost::filesystem::path& filePath,
+	const std::string&             content
+) {
+	boost::filesystem::ofstream file(filePath);
+
+	if ( file.is_open() ) {
+		file << content << std::endl;
+
+		return true;
+	} else {
+		return false;
+	}
+}
+
+}
+
+namespace InputXSLT {
+
+xercesc::DOMDocument* FunctionWriteFile::constructDocument(
+	boost::filesystem::path filePath,
+	std::string             content
+) {
+	xercesc::DOMDocument* const domDocument(
+		xercesc::DOMImplementation::getImplementation()->createDocument(
+			nullptr,
+			*XercesStringGuard<XMLCh>("content"),
+			nullptr
+		)
+	);
+
+	xercesc::DOMNode* const rootNode(
+		domDocument->getDocumentElement()
+	);
+
+	ResultNodeFacade result(domDocument, rootNode, "file");
+	result.setAttribute("path", filePath.string());
+
+	if ( writeFile(filePath, content) ) {
+		result.setAttribute("result", "success");
+	} else {
+		result.setAttribute("result", "error");
+	}
+
+	return domDocument;
+}
+
+}