Add a toString() to CRFClassifier which tries to show where the classifier came from and the labels it has

Author: AngledLuffa

src/edu/stanford/nlp/ie/AbstractSequenceClassifier.java

@@ -1499,6 +1499,7 @@ public abstract void loadClassifier(ObjectInputStream in, Properties props) thro
    */
   public void loadClassifier(String loadPath) throws ClassCastException, IOException, ClassNotFoundException {
     loadClassifier(loadPath, null);
+    flags.loadClassifier = loadPath;
   }
 
   /**
@@ -1509,6 +1510,7 @@ public void loadClassifier(String loadPath, Properties props) throws ClassCastEx
     try (InputStream is = IOUtils.getInputStreamFromURLOrClasspathOrFileSystem(loadPath)) {
       Timing t = new Timing();
       loadClassifier(is, props);
+      flags.loadClassifier = loadPath;
       t.done(log, "Loading classifier from " + loadPath);
     }
   }
@@ -1529,6 +1531,7 @@ public void loadClassifierNoExceptions(String loadPath, Properties props) {
 
   public void loadClassifier(File file) throws ClassCastException, IOException, ClassNotFoundException {
     loadClassifier(file, null);
+    flags.loadClassifier = file.toString();
   }
 
   /**
@@ -1555,6 +1558,7 @@ public void loadClassifier(File file, Properties props) throws ClassCastExceptio
     }
     try {
       loadClassifier(bis, props);
+      flags.loadClassifier = file.toString();
       t.done(log, "Loading classifier from " + file.getAbsolutePath());
     } finally {
       bis.close();

src/edu/stanford/nlp/ie/crf/CRFClassifier.java

@@ -2921,6 +2921,20 @@ private static CRFClassifier<CoreLabel> chooseCRFClassifier(SeqClassifierFlags f
     return crf;
   }
 
+  public String toString() {
+    String name = flags.loadClassifier;
+    if (name == null) {
+      name = flags.serializeTo;
+    }
+    if (name == null) {
+      name = flags.trainFile;
+    }
+    if (name == null) {
+      name = super.toString();
+    }
+    return name + classIndex.toString();
+  }
+
   /** The main method. See the class documentation. */
   public static void main(String[] args) throws Exception {
     StringUtils.logInvocationString(log, args);