Second working commit.

1 files changed, 30 insertions, 0 deletions

diff --git a/extractor/features/max_lex_source_given_target.cc b/extractor/features/max_lex_source_given_target.cc
new file mode 100644
index 00000000..c4792d49
--- /dev/null
+++ b/extractor/features/max_lex_source_given_target.cc
@@ -0,0 +1,30 @@
+#include "max_lex_source_given_target.h"
+
+#include <cmath>
+
+#include "../translation_table.h"
+
+MaxLexSourceGivenTarget::MaxLexSourceGivenTarget(
+    shared_ptr<TranslationTable> table) :
+    table(table) {}
+
+double MaxLexSourceGivenTarget::Score(const FeatureContext& context) const {
+  vector<string> source_words = context.source_phrase.GetWords();
+  // TODO(pauldb): Add NULL to target_words, after fixing translation table.
+  vector<string> target_words = context.target_phrase.GetWords();
+
+  double score = 0;
+  for (string source_word: source_words) {
+    double max_score = 0;
+    for (string target_word: target_words) {
+      max_score = max(max_score,
+          table->GetSourceGivenTargetScore(source_word, target_word));
+    }
+    score += max_score > 0 ? -log10(max_score) : MAX_SCORE;
+  }
+  return score;
+}
+
+string MaxLexSourceGivenTarget::GetName() const {
+  return "MaxLexFGivenE";
+}