From 02099a01350a41a99ec400e9b29df08a01d88979 Mon Sep 17 00:00:00 2001
From: Paul Baltescu <pauldb89@gmail.com>
Date: Tue, 4 Jun 2013 23:17:57 +0100
Subject: Serialize data structures.

---
 extractor/translation_table.h | 42 ++++++++++++++++++++++++++++++++++++++----
 1 file changed, 38 insertions(+), 4 deletions(-)

(limited to 'extractor/translation_table.h')

diff --git a/extractor/translation_table.h b/extractor/translation_table.h
index ed43ad72..2a37bab7 100644
--- a/extractor/translation_table.h
+++ b/extractor/translation_table.h
@@ -7,6 +7,9 @@
 
 #include <boost/filesystem.hpp>
 #include <boost/functional/hash.hpp>
+#include <boost/serialization/serialization.hpp>
+#include <boost/serialization/split_member.hpp>
+#include <boost/serialization/utility.hpp>
 
 using namespace std;
 namespace fs = boost::filesystem;
@@ -23,11 +26,16 @@ class DataArray;
  */
 class TranslationTable {
  public:
+  // Constructs a translation table from source data, target data and the
+  // corresponding alignment.
   TranslationTable(
       shared_ptr<DataArray> source_data_array,
       shared_ptr<DataArray> target_data_array,
       shared_ptr<Alignment> alignment);
 
+  // Creates empty translation table.
+  TranslationTable();
+
   virtual ~TranslationTable();
 
   // Returns p(e | f).
@@ -38,10 +46,7 @@ class TranslationTable {
   virtual double GetSourceGivenTargetScore(const string& source_word,
                                            const string& target_word);
 
-  void WriteBinary(const fs::path& filepath) const;
-
- protected:
-  TranslationTable();
+  bool operator==(const TranslationTable& other) const;
 
  private:
   // Increment links count for the given (f, e) word pair.
@@ -52,6 +57,35 @@ class TranslationTable {
       int source_word_id,
       int target_word_id) const;
 
+  friend class boost::serialization::access;
+
+  template<class Archive> void save(Archive& ar, unsigned int) const {
+    ar << *source_data_array << *target_data_array;
+
+    int num_entries = translation_probabilities.size();
+    ar << num_entries;
+    for (auto entry: translation_probabilities) {
+      ar << entry;
+    }
+  }
+
+  template<class Archive> void load(Archive& ar, unsigned int) {
+    source_data_array = make_shared<DataArray>();
+    ar >> *source_data_array;
+    target_data_array = make_shared<DataArray>();
+    ar >> *target_data_array;
+
+    int num_entries;
+    ar >> num_entries;
+    for (size_t i = 0; i < num_entries; ++i) {
+      pair<pair<int, int>, pair<double, double>> entry;
+      ar >> entry;
+      translation_probabilities.insert(entry);
+    }
+  }
+
+  BOOST_SERIALIZATION_SPLIT_MEMBER();
+
   shared_ptr<DataArray> source_data_array;
   shared_ptr<DataArray> target_data_array;
   unordered_map<pair<int, int>, pair<double, double>, PairHash>
-- 
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