From 8bec3821df2a4cc873207d635c3aa4f6caed459a Mon Sep 17 00:00:00 2001
From: John Rogers <jgrogers@gmail.com>
Date: Fri, 4 Feb 2011 20:48:16 +0000
Subject: [PATCH] Added serialization support for FastMap so that LieValues can
 be serialized.

---
 gtsam/base/FastMap.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/gtsam/base/FastMap.h b/gtsam/base/FastMap.h
index 965eeba38..b26dfe1c9 100644
--- a/gtsam/base/FastMap.h
+++ b/gtsam/base/FastMap.h
@@ -20,6 +20,7 @@
 
 #include <map>
 #include <boost/pool/pool_alloc.hpp>
+#include <boost/serialization/base_object.hpp>
 
 namespace gtsam {
 
@@ -30,6 +31,7 @@ namespace gtsam {
  * we've seen that the fast_pool_allocator can lead to speedups of several
  * percent.
  */
+
 template<typename KEY, typename VALUE>
 class FastMap : public std::map<KEY, VALUE, std::less<KEY>, boost::fast_pool_allocator<std::pair<const KEY, VALUE> > > {
 
@@ -50,6 +52,16 @@ public:
   /** Copy constructor from the base map class */
   FastMap(const Base& x) : Base(x) {}
 
+  private:
+  /** Serialization function */
+  friend class boost::serialization::access;
+  template<class ARCHIVE>
+    void serialize(ARCHIVE & ar, const unsigned int version) {
+    //You are not supposed to do this:
+    boost::serialization::serialize(ar, *this, version);
+    //Instead you are supposed to do this:  but it doesnt work
+    //    ar & boost::serialization::base_object<Base>(*this);
+  }
 };
 
 }