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1
22 package org.jboss.virtual.plugins.vfs.helpers;
23
24 import java.util.StringTokenizer  ;
25
26
32 public class PathTokenizer
33 {
34
37 private PathTokenizer()
38 {
39 }
40
41
48 public static String [] getTokens(String path)
49 {
50 if (path == null)
51 throw new IllegalArgumentException ("Null path");
52
53 StringTokenizer tokenizer = new StringTokenizer (path, "/");
54 int count = tokenizer.countTokens();
55 if (count == 0)
56 return null;
57
58 String [] tokens = new String [count];
59 int i = 0;
60 while (tokenizer.hasMoreTokens())
61 {
62 String token = tokenizer.nextToken();
63
64 if (token.equals(""))
65 throw new IllegalArgumentException ("A path element is empty: " + path);
66 if (token.equals(".") || token.equals(".."))
67 throw new IllegalArgumentException ("Reverse paths are not allowed (containing a . or ..), use getParent(): " + path);
68
69 tokens[i++] = token;
70 }
71 return tokens;
72 }
73
74
82 public static String getRemainingPath(String [] tokens, int i)
83 {
84 if (tokens == null)
85 throw new IllegalArgumentException ("Null tokens");
86 if (i < 0 || i >= tokens.length)
87 throw new IllegalArgumentException ("i is not in the range of tokens: 0" + (tokens.length-1));
88
89 if (i == tokens.length-1)
90 return tokens[tokens.length-1];
91
92 StringBuilder buffer = new StringBuilder ();
93 for (; i < tokens.length-1; ++i)
94 {
95 buffer.append(tokens[i]);
96 buffer.append("/");
97 }
98 buffer.append(tokens[tokens.length-1]);
99 return buffer.toString();
100 }
101 }
102 |
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