1 /*
   2  * Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.nio.fs;
  27 
  28 import java.io.IOException;
  29 import java.nio.file.Path;
  30 
  31 /**
  32  * File type detector that uses a file extension to look up its MIME type
  33  * via the Apple Uniform Type Identifier interfaces.
  34  */
  35 class UTIFileTypeDetector extends AbstractFileTypeDetector {
  36     UTIFileTypeDetector() {
  37         super();
  38     }
  39 
  40     private native String probe0(String fileExtension) throws IOException;
  41 
  42     @Override
  43     protected String implProbeContentType(Path path) throws IOException {
  44         Path fn = path.getFileName();
  45         if (fn == null)
  46             return null;  // no file name
  47 
  48         String ext = getExtension(fn.toString());
  49         if (ext.isEmpty())
  50             return null;  // no extension
  51 
  52         return probe0(ext);
  53     }
  54 
  55     static {
  56         jdk.internal.access.SharedSecrets.getJavaLangAccess()
  57                 .loadLibrary(UTIFileTypeDispatcher.class, "nio");
  58     }
  59 }