1 files changed, 24 insertions, 4 deletions
diff --git a/extractor/suffix_array.h b/extractor/suffix_array.h
index bf731d79..8ee454ec 100644
--- a/extractor/suffix_array.h
+++ b/extractor/suffix_array.h
@@ -6,6 +6,9 @@
 #include <vector>
 
 #include <boost/filesystem.hpp>
+#include <boost/serialization/serialization.hpp>
+#include <boost/serialization/split_member.hpp>
+#include <boost/serialization/vector.hpp>
 
 namespace fs = boost::filesystem;
 using namespace std;
@@ -20,6 +23,9 @@ class SuffixArray {
   // Creates a suffix array from a data array.
   SuffixArray(shared_ptr<DataArray> data_array);
 
+  // Creates empty suffix array.
+  SuffixArray();
+
   virtual ~SuffixArray();
 
   // Returns the size of the suffix array.
@@ -40,10 +46,7 @@ class SuffixArray {
   virtual PhraseLocation Lookup(int low, int high, const string& word,
                                 int offset) const;
 
-  void WriteBinary(const fs::path& filepath) const;
-
- protected:
-  SuffixArray();
+  bool operator==(const SuffixArray& other) const;
 
  private:
   // Constructs the suffix array using the algorithm of Larsson and Sadakane
@@ -65,6 +68,23 @@ class SuffixArray {
   // offset value is greater or equal to word_id.
   int LookupRangeStart(int low, int high, int word_id, int offset) const;
 
+  friend class boost::serialization::access;
+
+  template<class Archive> void save(Archive& ar, unsigned int) const {
+    ar << *data_array;
+    ar << suffix_array;
+    ar << word_start;
+  }
+
+  template<class Archive> void load(Archive& ar, unsigned int) {
+    data_array = make_shared<DataArray>();
+    ar >> *data_array;
+    ar >> suffix_array;
+    ar >> word_start;
+  }
+
+  BOOST_SERIALIZATION_SPLIT_MEMBER();
+
   shared_ptr<DataArray> data_array;
   vector<int> suffix_array;
   vector<int> word_start;