1 files changed, 99 insertions, 0 deletions
diff --git a/src/xml/XmlReader.cpp b/src/xml/XmlReader.cpp
new file mode 100644
index 0000000..fd03ffb
--- /dev/null
+++ b/src/xml/XmlReader.cpp
@@ -0,0 +1,99 @@
+/*
+    Ousía
+    Copyright (C) 2014  Benjamin Paaßen, Andreas Stöckel
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <QXmlStreamReader>
+
+#include <sstream>
+#include <iostream>
+
+#include "XmlElementHandler.hpp"
+#include "XmlReader.hpp"
+
+namespace ousia {
+namespace xml {
+
+XmlReader::XmlReader(QXmlStreamReader &xml) :
+	xml(xml)
+{
+	// Do nothing here
+}
+
+bool XmlReader::expectOneOf(std::vector<XmlElementHandler> &handlers)
+{
+	// Skip all tokens except for "start element" and "end element"
+	while (!xml.atEnd()) {
+		// TODO: Implement mechanism for using the current state of the
+		// XmlStreamReader instead of always reading the next token?
+		const auto tokenType = xml.readNext();
+		switch (tokenType) {
+			case QXmlStreamReader::StartElement:
+				for (auto &h : handlers) {
+					if (h.matches(xml.name())) {
+						return h.execute();
+					}
+				}
+				// Expected tag was not found, display error message
+				// TODO: Use better logging mechanism!
+				std::cout << "Expected one of the following tags: ("
+						<<  XmlElementHandler::expectedElementsStr(handlers)
+						<< "); but found element \""
+						<< xml.name().toString().toStdString()
+						<< "\" instead!" << std::endl;
+				return false;
+			case QXmlStreamReader::EndElement:
+				// Expected tag was not found, instead we found a closing tag!
+				// TODO: Use better logging mechanism!
+				std::cout << "Expected one of the following tags: ("
+						<<  XmlElementHandler::expectedElementsStr(handlers)
+						<< "); but found end of element \""
+						<< xml.name().toString().toStdString()
+						<< "\" instead!" << std::endl;
+				return false;
+			default:
+				continue;
+		}
+	}
+	return false;
+}
+
+std::shared_ptr<model::GraphNode> XmlReader::process()
+{
+	std::shared_ptr<model::GraphNode> res{nullptr};
+	std::vector<XmlElementHandler> handlers{
+		{"domain", [&](){return (res = this->readDomain()) != nullptr;}}
+	};
+	if (!expectOneOf(handlers)) {
+		std::cout << "Errors occured while parsing XML file!" << std::endl;
+		return nullptr;
+	}
+	return res;
+}
+
+std::shared_ptr<model::domain::Domain> XmlReader::readDomain()
+{
+	if (!xml.attributes().hasAttribute("name")) {
+		std::cout << "Expected name attribute!" << std::endl;
+		return nullptr;
+	}
+	std::cout << "domain name: " << xml.attributes().value("name").toString().toStdString() << std::endl;
+	return std::shared_ptr<model::domain::Domain>(new model::domain::Domain());
+}
+
+}
+}
+