From b85986c762bc8a2a74bfe0e2eb1d88fba991d554 Mon Sep 17 00:00:00 2001
From: chris dyer <redpony@umd.edu>
Date: Tue, 28 Dec 2010 20:56:42 -0500
Subject: incorporate dwarf features

---
 decoder/ff_dwarf.h | 100 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 decoder/ff_dwarf.h

(limited to 'decoder/ff_dwarf.h')

diff --git a/decoder/ff_dwarf.h b/decoder/ff_dwarf.h
new file mode 100644
index 00000000..083fcc7c
--- /dev/null
+++ b/decoder/ff_dwarf.h
@@ -0,0 +1,100 @@
+#include <vector>
+#include <map>
+#include <string>
+#include "ff.h"
+#include "dwarf.h"
+#include "lattice.h"
+
+using namespace std;
+
+class Dwarf : public FeatureFunction {
+ public:
+  Dwarf(const std::string& param);
+  /* State-related param
+     STATE_SIZE: the number of ints 
+     MAXIMUM_ALIGNMENTS: the maximum number of alignments in the states, 
+                         each alignment point is encoded in one int 
+                         (the first two bytes for source, and the remaining one for target)
+  */
+  static const int STATE_SIZE=53; 
+  static const int IMPOSSIBLY_LARGE_POS = 9999999;
+  static const int MAXIMUM_ALIGNMENTS=37;
+  /* Read from file the Orientation(Source|Target model parameter. */ 
+  static bool readOrientation(CountTable* table, const std::string& filename, std::map<WordID,int> *fw, bool pos=false);
+  /* Read from file the Dominance(Source|Target) model parameter. */ 
+  static bool readDominance(CountTable* table, const std::string& filename, std::map<WordID,int> *fw, bool pos=false);
+  static bool readList(const std::string& filename, std::map<WordID,int>* fw);     
+  static double IntegerToDouble(int val);
+  static int DoubleToInteger(double val);
+  bool readTags(const std::string& filename, std::map<WordID,WordID>* tags);
+  bool generalizeOrientation(CountTable* table, const std::map<WordID,WordID>& tags, bool pos=false);  
+  bool generalizeDominance(CountTable* table, const std::map<WordID,WordID>& tags, bool pos=false);  
+  static void stripIndex(const string& source, string* pkey, string* pidx) {
+    if (DEBUG) cerr << "    stripIndex(" << source << ")" << endl;
+    int found = source.find_last_of("/");
+    string idx = source.substr(found+1);
+    string key = source.substr(0,found);
+    if (DEBUG) cerr << "      found=" << found << "," << key << "," << idx << endl;
+    pkey = &key;
+    pidx = &idx;
+  }
+
+
+ protected:
+  /* The high-level workflow is as follow:
+     1. call *als->prepare*, which constructs the full alignment of the edge while taking into account the antecedents
+        also in this call, function words are identified. Most of the work in this call is to make sure the indexes 
+        of the alignments (including the function words) are consistent with the newly created alignment
+     2. call *als->computeOrientationSource*, *als->computeOrientationTarget*, 
+        *als->computeDominanceSource*, or *als->computeDominanceTarget*
+        and pass the resulting score to either *features* or to *estimated_features*
+     3. call *als->BorderingSFWsOnly()* and *als->BorderingTFWsOnly()*, which removes records of all function word
+        alignments except those at the borders. Note that fw alignments kept may be more than two on each side
+        for examples if there are a number of unaligned fw alignments before the leftmost alignment or the rightmost one
+     4. call *als->simplify()*, which assigns the state of this edge (*context*). It simplifies the alignment space to 
+        its most compact representation, enough to compute the unscored models. This is done by observing the surviving
+        function word alignments set by 3.
+  */ 
+  void TraversalFeaturesImpl(const SentenceMetadata& smeta,
+                                     const Hypergraph::Edge& edge,
+                                     const std::vector<const void*>& ant_contexts,
+                                     SparseVector<double>* features,
+                                     SparseVector<double>* estimated_features,
+                                     void* context) const;
+ private:
+  Alignment* als;
+  /* Feature IDs set by calling FD::Convert(model's string) */
+  int oris_, oris_bo1_, oris_bo2_, orit_, orit_bo1_, orit_bo2_;
+  int oris_backward_, orit_backward_, porislr_, porisrl_, goris_, pgorislr_, pgorisrl_;
+  int pdomslr_, pdomsrl_, pgdomslr_, pgdomsrl_;
+  int doms_, doms_bo1_, doms_bo2_, domt_, domt_bo1_, domt_bo2_;
+  int tfw_count_;
+  int bdoms_; 
+  int poris_count;
+  int pgoris_count;
+  int poris_nlr, poris_nrl; // maximum depth (1->from the beginning of the sentence, 2-> from the end of the sentence)
+  int pgoris_nlr, pgoris_nrl;
+  int pdoms_nlr, pdoms_nrl;
+  int pgdoms_nlr, pgdoms_nrl;
+  int* _sent_id;
+  int* _fwcount;
+  WordID kSOS;
+  WordID kEOS;
+  string sSOS;
+  string sEOS;
+  WordID kGOAL;
+  /* model's flag, if set true will invoke the model scoring */
+  bool flag_oris, flag_orit, flag_doms, flag_domt, flag_tfw_count, flag_oris_backward, flag_orit_backward, flag_bdoms;
+  bool flag_porislr, flag_porisrl, flag_goris, flag_pgorislr, flag_pgorisrl;
+  bool explicit_soseos;
+  bool flag_pdomslr, flag_pdomsrl, flag_pgdomslr, flag_pgdomsrl, flag_gdoms;
+  /* a collection of Source function words (sfw) and Target function words (tfw) */
+  std::map<WordID,int> sfw;
+  std::map<WordID,int> tfw;
+  std::map<WordID,WordID> tags;
+  /* a collection of model's parameter */
+  CountTable toris, torit, tdoms, tbdoms, tdomt, tporislr, tporisrl, tgoris, tpgorislr, tpgorisrl;
+  CountTable tpdomslr, tpdomsrl, tpgdomslr, tpgdomsrl;
+  void neighboringFWs(const Lattice& l, const int& i, const int& j, const map<WordID,int>& fw_hash, int* lfw, int* rfw);
+};
+
-- 
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