Added implementations of missing functions.

bob/learn/activation/cpp/ActivationRegistry.cpp

@@ -8,12 +8,35 @@
  */
 
 #include <bob.learn.activation/Activation.h>
+#include <boost/make_shared.hpp>
 
 boost::shared_ptr<bob::learn::activation::ActivationRegistry> bob::learn::activation::ActivationRegistry::instance() {
   static boost::shared_ptr<bob::learn::activation::ActivationRegistry> s_instance(new ActivationRegistry());
   return s_instance;
 }
 
+boost::shared_ptr<bob::learn::activation::Activation> bob::learn::activation::load_activation(bob::io::base::HDF5File& f) {
+  auto make = ActivationRegistry::instance()->find(f.read<std::string>("id"));
+  return make(f);
+}
+
+boost::shared_ptr<bob::learn::activation::Activation> bob::learn::activation::make_deprecated_activation(uint32_t e) {
+  switch(e) {
+    case 0:
+      return boost::make_shared<bob::learn::activation::IdentityActivation>();
+      break;
+    case 1:
+      return boost::make_shared<bob::learn::activation::HyperbolicTangentActivation>();
+      break;
+    case 2:
+      return boost::make_shared<bob::learn::activation::LogisticActivation>();
+      break;
+    default:
+      throw std::runtime_error("unsupported (deprecated) activation read from HDF5 file - not any of 0 (linear), 1 (tanh) or 2 (logistic)");
+  }
+}
+
+
 void bob::learn::activation::ActivationRegistry::deregisterFactory(const std::string& id) {
   s_id2factory.erase(id);
 }
@@ -35,7 +58,6 @@ void bob::learn::activation::ActivationRegistry::registerActivation(const std::s
     //replacing with the same factory may be the result of multiple python
     //modules being loaded.
   }
-
 }
 
 bool bob::learn::activation::ActivationRegistry::isRegistered(const std::string& id) {