src/java.base/share/classes/sun/nio/fs/AbstractFileTypeDetector.java

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rev 12244 : 8129632: (fs) Files.probeContentType returns null on Mac OS X
Summary: Append a Uniform Type Identifier-based FileType Detector for Mac OS X
Reviewed-by: XXX

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2008, 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this

@@ -39,10 +39,22 @@
 {
     protected AbstractFileTypeDetector() {
         super();
     }
 
+    // Get the extension of a file name.
+    protected static String getExtension(String name) {
+        String ext = "";
+        if (name != null && !name.isEmpty()) {
+            int dot = name.indexOf('.');
+            if ((dot >= 0) && (dot < name.length() - 1)) {
+                ext = name.substring(dot + 1);
+            }
+        }
+        return ext;
+    }
+
     /**
      * Invokes the appropriate probe method to guess a file's content type,
      * and checks that the content type's syntax is valid.
      */
     @Override