add policy checker
Change-Id: I90c50d15b1d9d97832c66ce90e39524729f12a0f
diff --git a/core/conf/checker.hpp b/core/conf/checker.hpp
new file mode 100644
index 0000000..bc253f3
--- /dev/null
+++ b/core/conf/checker.hpp
@@ -0,0 +1,98 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2014, Regents of the University of California
+ *
+ * This file is part of NSL (NDN Signature Logger).
+ * See AUTHORS.md for complete list of NSL authors and contributors.
+ *
+ * NSL 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.
+ *
+ * NSL 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
+ * NSL, e.g., in COPYING.md file. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * See AUTHORS.md for complete list of nsl authors and contributors.
+ */
+
+#ifndef NSL_CONF_CHECKER_HPP
+#define NSL_CONF_CHECKER_HPP
+
+#include "common.hpp"
+#include "config.hpp"
+#include "key-locator-checker.hpp"
+
+#include <boost/algorithm/string.hpp>
+#include <boost/filesystem.hpp>
+#include <boost/lexical_cast.hpp>
+
+namespace nsl {
+namespace conf {
+
+class Checker
+{
+public:
+ virtual
+ ~Checker();
+
+ /**
+ * @brief check if data satisfies condition defined in the specific checker implementation
+ *
+ * @param data Data packet
+ * @return false if data cannot pass checking
+ */
+ virtual bool
+ check(const Data& data) = 0;
+};
+
+class CustomizedChecker : public Checker
+{
+public:
+ CustomizedChecker(uint32_t sigType, shared_ptr<KeyLocatorChecker> keyLocatorChecker);
+
+ virtual bool
+ check(const Data& data);
+
+private:
+ uint32_t m_sigType;
+ shared_ptr<KeyLocatorChecker> m_keyLocatorChecker;
+};
+
+class HierarchicalChecker : public CustomizedChecker
+{
+public:
+ explicit
+ HierarchicalChecker(uint32_t sigType);
+};
+
+class CheckerFactory
+{
+public:
+ /**
+ * @brief create a checker from configuration file.
+ *
+ * @param configSection The section containing the definition of checker.
+ * @return a shared pointer to the created checker.
+ */
+ static shared_ptr<Checker>
+ create(const ConfigSection& configSection);
+
+private:
+ static shared_ptr<Checker>
+ createCustomizedChecker(const ConfigSection& configSection);
+
+ static shared_ptr<Checker>
+ createHierarchicalChecker(const ConfigSection& configSection);
+
+ static uint32_t
+ getSigType(const std::string& sigType);
+};
+
+} // namespace conf
+} // namespace nsl
+
+#endif // NSL_CONF_CHECKER_HPP