remove all external algorithm libraries.

add crflite encode and decode unit test.

BotSharp.NLP.UnitTest/CRFLite/EncoderTest.cs

@@ -1,6 +1,12 @@
 using BotSharp.Models.CRFLite;
+using BotSharp.Models.CRFLite.Decoder;
 using BotSharp.Models.CRFLite.Encoder;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.IO;
+using System.Text;
+using System.Threading.Tasks;
 
 namespace BotSharp.NLP.UnitTest.CRFLite
 {
@@ -13,10 +19,260 @@ namespace BotSharp.NLP.UnitTest.CRFLite
             var encoder = new CRFEncoder();
             bool result = encoder.Learn(new EncoderOptions
             {
-                TrainingCorpusFileName = @"C:\Users\haipi\Documents\Projects\BotSharp\Data\English\corpus\eng.1K.training",
-                TemplateFileName = @"C:\Users\haipi\Documents\Projects\BotSharp\Data\English\template.NE",
-                ModelFileName = @"C:\Users\haipi\Documents\Projects\BotSharp\Data\English\model\ner_model_eng"
+                TrainingCorpusFileName = @"C:\Users\haipi\Documents\Projects\BotSharp\Data\CRF\eng.1k.training",
+                TemplateFileName = @"C:\Users\haipi\Documents\Projects\BotSharp\Data\CRF\template.en",
+                ModelFileName = @"C:\Users\haipi\Documents\Projects\BotSharp\Data\CRF\ner_model"
             });
+
+            Assert.IsTrue(result);
+        }
+
+        object rdLocker = new object();
+
+        [TestMethod]
+        public void TestDecode()
+        {
+            var decoder = new CRFDecoder();
+            var options = new DecoderOptions
+            {
+                InputFileName = @"C:\Users\haipi\Documents\Projects\BotSharp\Data\CRF\test.txt",
+                OutputSegFileName = @"C:\Users\haipi\Documents\Projects\BotSharp\Data\CRF\test.seg.txt",
+                OutputFileName = @"C:\Users\haipi\Documents\Projects\BotSharp\Data\CRF\test.output.txt",
+                ModelFileName = @"C:\Users\haipi\Documents\Projects\BotSharp\Data\CRF\ner_model"
+            };
+
+            var sr = new StreamReader(options.InputFileName);
+            StreamWriter sw = null, swSeg = null;
+
+            if (options.OutputFileName != null && options.OutputFileName.Length > 0)
+            {
+                sw = new StreamWriter(options.OutputFileName);
+            }
+            if (options.OutputSegFileName != null && options.OutputSegFileName.Length > 0)
+            {
+                swSeg = new StreamWriter(options.OutputSegFileName);
+            }
+
+            //Load encoded model from file
+            decoder.LoadModel(options.ModelFileName);
+
+            var queueRecords = new ConcurrentQueue<List<List<string>>>();
+            var queueSegRecords = new ConcurrentQueue<List<List<string>>>();
+
+            var parallelOption = new ParallelOptions();
+            parallelOption.MaxDegreeOfParallelism = options.Thread;
+            Parallel.For(0, options.Thread, parallelOption, t =>
+            {
+
+                //Create decoder tagger instance. If the running environment is multi-threads, each thread needs a separated instance
+                var tagger = decoder.CreateTagger(options.NBest, options.MaxWord);
+                tagger.set_vlevel(options.ProbLevel);
+
+                //Initialize result
+                var crf_out = new crf_seg_out[options.NBest];
+                for (var i = 0; i < options.NBest; i++)
+                {
+                    crf_out[i] = new crf_seg_out(tagger.crf_max_word_num);
+                }
+
+                var inbuf = new List<List<string>>();
+                while (true)
+                {
+                    lock (rdLocker)
+                    {
+                        if (ReadRecord(inbuf, sr) == false)
+                        {
+                            break;
+                        }
+
+                        queueRecords.Enqueue(inbuf);
+                        queueSegRecords.Enqueue(inbuf);
+                    }
+
+                    //Call CRFSharp wrapper to predict given string's tags
+                    if (swSeg != null)
+                    {
+                        decoder.Segment(crf_out, tagger, inbuf);
+                    }
+                    else
+                    {
+                        decoder.Segment((CRFTermOut[])crf_out, (DecoderTagger)tagger, inbuf);
+                    }
+
+                    List<List<string>> peek = null;
+                    //Save segmented tagged result into file
+                    if (swSeg != null)
+                    {
+                        var rstList = ConvertCRFTermOutToStringList(inbuf, crf_out);
+                        while (peek != inbuf)
+                        {
+                            queueSegRecords.TryPeek(out peek);
+                        }
+                        for (int index = 0; index < rstList.Count; index++)
+                        {
+                            var item = rstList[index];
+                            swSeg.WriteLine(item);
+                        }
+                        queueSegRecords.TryDequeue(out peek);
+                        peek = null;
+                    }
+
+                    //Save raw tagged result (with probability) into file
+                    if (sw != null)
+                    {
+                        while (peek != inbuf)
+                        {
+                            queueRecords.TryPeek(out peek);
+                        }
+                        OutputRawResultToFile(inbuf, crf_out, tagger, sw);
+                        queueRecords.TryDequeue(out peek);
+
+                    }
+                }
+            });
+
+
+            sr.Close();
+
+            if (sw != null)
+            {
+                sw.Close();
+            }
+            if (swSeg != null)
+            {
+                swSeg.Close();
+            }
+        }
+
+        private bool ReadRecord(List<List<string>> inbuf, StreamReader sr)
+        {
+            inbuf.Clear();
+
+            while (true)
+            {
+                var strLine = sr.ReadLine();
+                if (strLine == null)
+                {
+                    //At the end of current file
+                    if (inbuf.Count == 0)
+                    {
+                        return false;
+                    }
+                    else
+                    {
+                        return true;
+                    }
+                }
+                strLine = strLine.Trim();
+                if (strLine.Length == 0)
+                {
+                    return true;
+                }
+
+                //Read feature set for each record
+                var items = strLine.Split(new char[] { '\t' });
+                inbuf.Add(new List<string>());
+                for (int index = 0; index < items.Length; index++)
+                {
+                    var item = items[index];
+                    inbuf[inbuf.Count - 1].Add(item);
+                }
+            }
+        }
+
+        private void OutputRawResultToFile(List<List<string>> inbuf, CRFTermOut[] crf_out, SegDecoderTagger tagger, StreamWriter sw)
+        {
+            for (var k = 0; k < crf_out.Length; k++)
+            {
+                if (crf_out[k] == null)
+                {
+                    //No more result
+                    break;
+                }
+
+                var sb = new StringBuilder();
+
+                var crf_seg_out = crf_out[k];
+                //Show the entire sequence probability
+                //For each token
+                for (var i = 0; i < inbuf.Count; i++)
+                {
+                    //Show all features
+                    for (var j = 0; j < inbuf[i].Count; j++)
+                    {
+                        sb.Append(inbuf[i][j]);
+                        sb.Append("\t");
+                    }
+
+                    //Show the best result and its probability
+                    sb.Append(crf_seg_out.result_[i]);
+
+                    if (tagger.vlevel_ > 1)
+                    {
+                        sb.Append("\t");
+                        sb.Append(crf_seg_out.weight_[i]);
+
+                        //Show the probability of all tags
+                        sb.Append("\t");
+                        for (var j = 0; j < tagger.ysize_; j++)
+                        {
+                            sb.Append(tagger.yname(j));
+                            sb.Append("/");
+                            sb.Append(tagger.prob(i, j));
+
+                            if (j < tagger.ysize_ - 1)
+                            {
+                                sb.Append("\t");
+                            }
+                        }
+                    }
+                    sb.AppendLine();
+                }
+                if (tagger.vlevel_ > 0)
+                {
+                    sw.WriteLine("#{0}", crf_seg_out.prob);
+                }
+                sw.WriteLine(sb.ToString().Trim());
+                sw.WriteLine();
+            }
+        }
+
+        private List<string> ConvertCRFTermOutToStringList(List<List<string>> inbuf, crf_seg_out[] crf_out)
+        {
+            var sb = new StringBuilder();
+            for (var i = 0; i < inbuf.Count; i++)
+            {
+                sb.Append(inbuf[i][0]);
+            }
+
+            var strText = sb.ToString();
+            var rstList = new List<string>();
+            for (var i = 0; i < crf_out.Length; i++)
+            {
+                if (crf_out[i] == null)
+                {
+                    //No more result
+                    break;
+                }
+
+                sb.Clear();
+                var crf_term_out = crf_out[i];
+                for (var j = 0; j < crf_term_out.Count; j++)
+                {
+                    var str = strText.Substring(crf_term_out.tokenList[j].offset, crf_term_out.tokenList[j].length);
+                    var strNE = crf_term_out.tokenList[j].strTag;
+
+                    sb.Append(str);
+                    if (strNE.Length > 0)
+                    {
+                        sb.Append("[" + strNE + "]");
+                    }
+                    sb.Append(" ");
+                }
+                rstList.Add(sb.ToString().Trim());
+            }
+
+            return rstList;
         }
     }
 }

BotSharp.NLP/Models/CRFLite/Decoder/DecoderOptions.cs

@@ -52,7 +52,7 @@ namespace BotSharp.Models.CRFLite.Decoder
             Thread = 1;
             NBest = 1;
             ProbLevel = 0;
-            MaxWord = 100;
+            MaxWord = 10;
         }
     }
 }

BotSharp.NLP/Models/CRFLite/Decoder/ModelReader.cs

@@ -68,7 +68,7 @@ namespace BotSharp.Models.CRFLite.Decoder
             LoadFeatureWeights();
         }
 
-        //获取key对应的特征id
+        //get key feature id
         public virtual int get_id(string str)
         {
             return da.SearchByPerfectMatch(str);
@@ -143,26 +143,20 @@ namespace BotSharp.Models.CRFLite.Decoder
                 var sr = new StreamReader(metadataStream);
                 string strLine;
 
-                //读入版本号
                 strLine = sr.ReadLine();
                 version = uint.Parse(strLine.Split(':')[1].Trim());
 
-                //读入cost_factor
                 strLine = sr.ReadLine();
                 cost_factor_ = double.Parse(strLine.Split(':')[1].Trim());
 
-                //读入maxid
                 strLine = sr.ReadLine();
                 maxid_ = long.Parse(strLine.Split(':')[1].Trim());
 
-                //读入xsize
                 strLine = sr.ReadLine();
                 xsize_ = uint.Parse(strLine.Split(':')[1].Trim());
 
-                //读入空行
                 strLine = sr.ReadLine();
 
-                //读入待标注的标签
                 y_ = new List<string>();
                 while (true)
                 {
@@ -174,7 +168,7 @@ namespace BotSharp.Models.CRFLite.Decoder
                     y_.Add(strLine);
                 }
 
-                //读入unigram和bigram模板
+                // load unigram and bigram template
                 unigram_templs_ = new List<string>();
                 bigram_templs_ = new List<string>();
                 while (sr.EndOfStream == false)