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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  package org.apache.myfaces.view.facelets.util;
20  
21  /**
22   * @author Jacob Hookom
23   * @version $Id: Path.java 1188235 2011-10-24 17:09:33Z struberg $
24   */
25  public final class Path
26  {
27  
28      public static final String normalize(String path)
29      {
30          if (path.length() == 0)
31          {
32              return path;
33          }
34          String n = path;
35          boolean abs = false;
36          while (n.indexOf('\\') >= 0)
37          {
38              n = n.replace('\\', '/');
39          }
40          if (n.charAt(0) != '/')
41          {
42              n = '/' + n;
43              abs = true;
44          }
45          int idx = 0;
46          while (true)
47          {
48              idx = n.indexOf("%20");
49              if (idx == -1)
50              {
51                  break;
52              }
53              n = n.substring(0, idx) + " " + n.substring(idx + 3);
54          }
55          while (true)
56          {
57              idx = n.indexOf("/./");
58              if (idx == -1)
59              {
60                  break;
61              }
62              n = n.substring(0, idx) + n.substring(idx + 2);
63          }
64          if (abs)
65          {
66              n = n.substring(1);
67          }
68          return n;
69      }
70  
71      public static final String relative(String ctx, String path)
72      {
73          if (path.length() == 0)
74          {
75              return context(ctx);
76          }
77          String c = context(normalize(ctx));
78          String p = normalize(path);
79          p = c + p;
80  
81          int idx = 0;
82          while (true)
83          {
84              idx = p.indexOf("/../");
85              if (idx == -1)
86              {
87                  break;
88              }
89              int s = p.lastIndexOf('/', idx - 3);
90              if (s == -1)
91              {
92                  break;
93              }
94              p = p.substring(0, s) + p.substring(idx + 3);
95          }
96          return p;
97      }
98  
99      public static final String context(String path)
100     {
101         int idx = path.lastIndexOf('/');
102         if (idx == -1)
103         {
104             return "/";
105         }
106         return path.substring(0, idx + 1);
107     }
108 
109 }