OPENNLP-1043: Ensure files are always loaded in same order

opennlp-tools/src/main/java/opennlp/tools/formats/DirectorySampleStream.java

@@ -21,6 +21,7 @@
 import java.io.FileFilter;
 import java.io.IOException;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 import java.util.Stack;
@@ -95,6 +96,8 @@ public File read() throws IOException {
         files = dir.listFiles();
       }
 
+      Arrays.sort(files);
+
       for (File file : files) {
         if (file.isFile()) {
           textFiles.push(file);
@@ -128,7 +131,5 @@ public void reset() {
    */
   @Override
   public void close() throws IOException {
-
   }
-
 }

opennlp-tools/src/test/java/opennlp/tools/eval/OntoNotes4NameFinderEval.java

@@ -68,7 +68,7 @@ private static void crossEval(TrainingParameters params, String type, double exp
   @Test
   public void evalEnglishPersonNameFinder() throws IOException {
     TrainingParameters params = ModelUtil.createDefaultTrainingParameters();
-    crossEval(params, "person", 0.8299903903167106d);
+    crossEval(params, "person", 0.8286204642039883d);
   }
 
   @Test

opennlp-tools/src/test/java/opennlp/tools/eval/OntoNotes4PosTaggerEval.java

@@ -62,6 +62,6 @@ private static void crossEval(TrainingParameters params, double expectedScore)
 
   @Test
   public void evalEnglishMaxentTagger() throws IOException {
-    crossEval(ModelUtil.createDefaultTrainingParameters(), 0.9699561275750962d);
+    crossEval(ModelUtil.createDefaultTrainingParameters(), 0.9698145168879707d);
   }
 }