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  * (Solaris) 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/...
  39  *
  40  * @author      Michael McMahon
  41  */
  42 
  43 public class FileURLMapper {
  44 
  45     URL url;
  46     String path;
  47 
  48     public FileURLMapper (URL url) {
  49         this.url = url;
  50     }
  51 
  52     /**
  53      * @return the platform specific path corresponding to the URL
  54      *  so long as the URL does not contain a hostname in the authority field.
  55      */
  56 
  57     public String getPath () {
  58         if (path != null) {
  59             return path;
  60         }
  61         String host = url.getHost();
  62         if (host == null || host.isEmpty() || "localhost".equalsIgnoreCase(host)) {
  63             path = url.getFile();
  64             path = ParseUtil.decode(path);
  65         }
  66         return path;
  67     }
  68 
  69     /**
  70      * Checks whether the file identified by the URL exists.
  71      */
  72     public boolean exists () {
  73         String s = getPath ();
  74         if (s == null) {
  75             return false;
  76         } else {
  77             File f = new File (s);
  78             return f.exists();
  79         }
  80     }
  81 }
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