Add a logging line which tells us which tags are in the tagger used by the srparser

Author: AngledLuffa

src/edu/stanford/nlp/parser/shiftreduce/ShiftReduceParser.java

@@ -534,6 +534,8 @@ private void train(List<Pair<String, FileFilter>> trainTreebankPath,
     if (op.testOptions.preTag) {
       Timing retagTimer = new Timing();
       tagger = Tagger.loadModel(op.testOptions.taggerSerializedFile);
+      log.info("Retagging with tagger model: " + op.testOptions.taggerSerializedFile);
+      log.info("Known tags in the tagger model: " + tagger.tagSet());
       redoTags(binarizedTrees, tagger, nThreads);
       retagTimer.done("Retagging");
     }

src/edu/stanford/nlp/tagger/common/Tagger.java

@@ -1,6 +1,7 @@
 package edu.stanford.nlp.tagger.common;
 
 import java.util.List;
+import java.util.Set;
 
 import edu.stanford.nlp.ling.HasWord;
 import edu.stanford.nlp.ling.TaggedWord;
@@ -24,6 +25,8 @@ public abstract class Tagger implements Function<List<? extends HasWord>,List<Ta
   @Override
   public abstract List<TaggedWord> apply(List<? extends HasWord> in);
 
+  public abstract Set<String> tagSet();
+
   public static Tagger loadModel(String path) {
     // TODO: we can avoid ReflectionLoading if we instead use the
     // serialization mechanism in MaxentTagger.  Similar to ParserGrammar

src/edu/stanford/nlp/tagger/maxent/MaxentTagger.java

@@ -358,6 +358,7 @@ public String getTag(int index) {
     return tags.getTag(index);
   }
 
+  @Override
   public Set<String> tagSet() {
     return tags.tagSet();
   }