1 /*
   2  * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   8  *   - Redistributions of source code must retain the above copyright
   9  *     notice, this list of conditions and the following disclaimer.
  10  *
  11  *   - Redistributions in binary form must reproduce the above copyright
  12  *     notice, this list of conditions and the following disclaimer in the
  13  *     documentation and/or other materials provided with the distribution.
  14  *
  15  *   - Neither the name of Oracle nor the names of its
  16  *     contributors may be used to endorse or promote products derived
  17  *     from this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  20  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  21  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  23  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  24  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  25  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  26  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  27  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  28  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  29  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31 
  32 /*
  33  * This source code is provided to illustrate the usage of a given feature
  34  * or technique and has been deliberately simplified. Additional steps
  35  * required for a production-quality application, such as security checks,
  36  * input validation and proper error handling, might not be present in
  37  * this sample code.
  38  */
  39 
  40 package com.sun.nio.zipfs;
  41 
  42 import java.nio.file.*;
  43 import java.nio.file.spi.*;
  44 import java.nio.file.attribute.*;
  45 import java.nio.file.spi.FileSystemProvider;
  46 
  47 import java.net.URI;
  48 import java.io.IOException;
  49 import java.net.URISyntaxException;
  50 import java.nio.channels.FileChannel;
  51 import java.util.HashMap;
  52 import java.util.Map;
  53 import java.util.Set;
  54 
  55 public class JarFileSystemProvider extends ZipFileSystemProvider
  56 {
  57 
  58     @Override
  59     public String getScheme() {
  60         return "jar";
  61     }
  62 
  63     @Override
  64     protected Path uriToPath(URI uri) {
  65         String scheme = uri.getScheme();
  66         if ((scheme == null) || !scheme.equalsIgnoreCase(getScheme())) {
  67             throw new IllegalArgumentException("URI scheme is not '" + getScheme() + "'");
  68         }
  69         try {
  70             String uristr = uri.toString();
  71             int end = uristr.indexOf("!/");
  72             uristr = uristr.substring(4, (end == -1) ? uristr.length() : end);
  73             uri = new URI(uristr);
  74             return Paths.get(new URI("file", uri.getHost(), uri.getPath(), null))
  75                         .toAbsolutePath();
  76         } catch (URISyntaxException e) {
  77             throw new AssertionError(e); //never thrown
  78         }
  79     }
  80 
  81     @Override
  82     public Path getPath(URI uri) {
  83         FileSystem fs = getFileSystem(uri);
  84         String path = uri.getFragment();
  85         if (path == null) {
  86             String uristr = uri.toString();
  87             int off = uristr.indexOf("!/");
  88             if (off != -1)
  89                 path = uristr.substring(off + 2);
  90         }
  91         if (path != null)
  92             return fs.getPath(path);
  93         throw new IllegalArgumentException("URI: "
  94             + uri
  95             + " does not contain path fragment ex. jar:///c:/foo.zip!/BAR");
  96     }
  97 }