imported patch classloader-cleanup

   1 /*
   2  * Copyright (c) 2002, 2003, 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 jdk.internal.loader;
  27 
  28 import java.net.URL;
  29 import java.io.File;
  30 import sun.net.www.ParseUtil;
  31 
  32 /**
  33  * (Unix) platform specific handling for file: URLs .
  34  * URLs must not contain a hostname in the authority field
  35  * other than "localhost".
  36  *
  37  * This implementation could be updated to map such URLs
  38  * on to /net/host/... on system using such an automounter map.
  39  *
  40  * @author      Michael McMahon
  41  */
  42 
  43 public class FileURLMapper {
  44     final URL url;

  45     String path;
  46 
  47     public FileURLMapper(URL url) {
  48         this.url = url;
  49     }
  50 
  51     /**
  52      * @return the platform specific path corresponding to the URL
  53      *  so long as the URL does not contain a hostname in the authority field.
  54      */
  55     public String getPath() {

  56         if (path != null) {
  57             return path;
  58         }
  59         String host = url.getHost();
  60         if (host == null || host.isEmpty() || "localhost".equalsIgnoreCase(host)) {
  61             path = url.getFile();
  62             path = ParseUtil.decode(path);
  63         }
  64         return path;
  65     }
  66 
  67     /**
  68      * Checks whether the file identified by the URL exists.
  69      */
  70     public boolean exists() {
  71         String s = getPath();
  72         return s != null && new File(s).exists();





  73     }
  74 }
--- EOF ---