1 files changed, 35 insertions, 0 deletions
diff --git a/decoder/ff_factory.cc b/decoder/ff_factory.cc
new file mode 100644
index 00000000..1854e0bb
--- /dev/null
+++ b/decoder/ff_factory.cc
@@ -0,0 +1,35 @@
+#include "ff_factory.h"
+
+#include "ff.h"
+
+using boost::shared_ptr;
+using namespace std;
+
+FFFactoryBase::~FFFactoryBase() {}
+
+void FFRegistry::DisplayList() const {
+  for (map<string, shared_ptr<FFFactoryBase> >::const_iterator it = reg_.begin();
+       it != reg_.end(); ++it) {
+    cerr << "  " << it->first << endl;
+  }
+}
+
+shared_ptr<FeatureFunction> FFRegistry::Create(const string& ffname, const string& param) const {
+  map<string, shared_ptr<FFFactoryBase> >::const_iterator it = reg_.find(ffname);
+  shared_ptr<FeatureFunction> res;
+  if (it == reg_.end()) {
+    cerr << "I don't know how to create feature " << ffname << endl;
+  } else {
+    res = it->second->Create(param);
+  }
+  return res;
+}
+
+void FFRegistry::Register(const string& ffname, FFFactoryBase* factory) {
+  if (reg_.find(ffname) != reg_.end()) {
+    cerr << "Duplicate registration of FeatureFunction with name " << ffname << "!\n";
+    abort();
+  }
+  reg_[ffname].reset(factory);
+}
+