First step of refactoring code (ccnx prefix => ndn prefix)
diff --git a/helper/ndn-face-container.h b/helper/ndn-face-container.h
new file mode 100644
index 0000000..e1fd4b2
--- /dev/null
+++ b/helper/ndn-face-container.h
@@ -0,0 +1,140 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2011 University of California, Los Angeles
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Author: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ */
+
+#ifndef NDN_FACE_CONTAINER_H
+#define NDN_FACE_CONTAINER_H
+
+#include <stdint.h>
+#include <vector>
+
+#include "ns3/ptr.h"
+#include "ns3/simple-ref-count.h"
+#include "ns3/ndn-face.h"
+
+namespace ns3 {
+
+/**
+ * \ingroup ndn-helpers
+ * \brief A pool for Ndn faces
+ *
+ * Provides tools to perform basic manipulation on faces, such as
+ * setting metrics and states on faces
+ *
+ * \see NdnStackHelper
+ */
+class NdnFaceContainer : public SimpleRefCount<NdnFaceContainer>
+{
+private:
+ typedef std::vector<Ptr<NdnFace> > FaceContainer;
+public:
+ typedef FaceContainer::const_iterator Iterator; ///< \brief Iterator over NdnFaceContainer
+
+ /**
+ * \brief Create an empty NdnFaceContainer.
+ */
+ NdnFaceContainer ();
+
+ /**
+ * \brief Copy constructor for NdnFaceContainer. Calls AddAll method
+ *
+ * \see NdnFaceContainer::AddAll
+ */
+ NdnFaceContainer (const NdnFaceContainer &other);
+
+ /**
+ * \brief Copy operator for NdnFaceContainer. Empties vector and calls AddAll method
+ *
+ * All previously obtained iterators (Begin() and End()) will be invalidated
+ *
+ * \see NdnFaceContainer::AddAll
+ */
+ NdnFaceContainer& operator= (const NdnFaceContainer &other);
+
+ /**
+ * \brief Add all entries from other container
+ *
+ * \param other smart pointer to a container
+ */
+ void AddAll (Ptr<NdnFaceContainer> other);
+
+ /**
+ * \brief Add all entries from other container
+ *
+ * \param other container
+ */
+ void AddAll (const NdnFaceContainer &other);
+
+ /**
+ * \brief Get an iterator which refers to the first pair in the
+ * container.
+ *
+ * \returns an iterator which refers to the first pair in the container.
+ */
+ Iterator Begin () const;
+
+ /**
+ * \brief Get an iterator which indicates past-the-last Node in the
+ * container.
+ *
+ * \returns an iterator which indicates an ending condition for a loop.
+ */
+ Iterator End () const;
+
+ /**
+ * \brief Get the number of faces stored in this container
+ *
+ * \returns the number of faces stored in this container
+ */
+ uint32_t GetN () const;
+
+ // /**
+ // * \brief Set a metric for all faces in the container
+ // *
+ // * \param metric value of metric to assign to all faces in the container
+ // */
+ // void SetMetricToAll (uint16_t metric);
+
+ /**
+ * Add an entry to the container
+ *
+ * \param face a smart pointer to a NdnFace-derived object
+ *
+ * @see NdnFace
+ */
+ void Add (const Ptr<NdnFace> &face);
+
+ /**
+ * Get a smart pointer to NdnFace-derived object stored in the container
+ *
+ * \param i the iterator corresponding to the requested object
+ *
+ * This method is redundant and simple dereferencing of the iterator should be used instead
+ *
+ * @see NdnFace
+ */
+ Ptr<NdnFace> Get (Iterator i) const;
+
+private:
+ FaceContainer m_faces;
+};
+
+} // namespace ns3
+
+#endif /* NDN_FACE_CONTAINER_H */