1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
/**
* ================================================
* LibLoader : a free Java resource loading library
* ================================================
*
* Project Info: http://reporting.pentaho.org/libloader/
*
* (C) Copyright 2006, by Pentaho Corporation and Contributors.
*
* This library is free software; you can redistribute it and/or modify it under the terms
* of the GNU Lesser General Public License as published by the Free Software Foundation;
* either version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
*
* ------------
* $Id: LoaderUtils.java 3520 2007-10-16 10:34:47Z tmorgner $
* ------------
* (C) Copyright 2006, by Pentaho Corporation.
*/
package org.jfree.resourceloader.loader;
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;
import org.jfree.resourceloader.ResourceKeyCreationException;
/**
* Creation-Date: 05.04.2006, 16:02:53
*
* @author Thomas Morgner
*/
public class LoaderUtils
{
private LoaderUtils()
{
}
/**
* Merges two paths. A path is recognized as an absolute path, if
* it has an URL-schema definition attached. A parent is recognized as
* container path (a directory, in the common language), if it ends with
* a slash.
*
* Todo: Introduce escaping using "\" as escape char.
*
* @param parent
* @param child
* @return
* @throws ResourceKeyCreationException
*/
public static String mergePaths(final String parent,
final String child)
throws ResourceKeyCreationException
{
final int childPrefix = child.indexOf("://");
if (childPrefix > 0)
{
return child;
}
final String parentResource;
final String parentPrefix;
final int parentPrefixPos = parent.indexOf("://");
if (parentPrefixPos > 0)
{
parentResource = parent.substring(parentPrefixPos + 3);
parentPrefix = parent.substring(0, parentPrefixPos + 3);
}
else
{
parentResource = parent;
parentPrefix = "";
}
final List parentList;
if (parentResource.endsWith("/"))
{
parentList = parseName(parentResource, false);
}
else
{
parentList = parseName(parentResource, true);
}
// construct the full name ...
parentList.addAll(parseName(child, false));
// and normalize it by removing all '.' and '..' elements.
final ArrayList normalizedList = new ArrayList();
for (int i = 0; i < parentList.size(); i++)
{
final String o = (String) parentList.get(i);
if (".".equals(o))
{
continue;
}
if ("..".equals(o))
{
if (normalizedList.isEmpty() == false)
{
// remove last element
normalizedList.remove(normalizedList.size() - 1);
}
}
else
{
normalizedList.add(o);
}
}
if (normalizedList.isEmpty())
{
throw new ResourceKeyCreationException("Unable to build a valid key.");
}
final StringBuffer buffer = new StringBuffer();
buffer.append(parentPrefix);
for (int i = 0; i < normalizedList.size(); i++)
{
final String s = (String) normalizedList.get(i);
if (i > 0)
{
buffer.append('/');
}
buffer.append(s);
}
return buffer.toString();
}
/**
* Parses the given name and returns the name elements as List of Strings.
*
* @param name the name, that should be parsed.
* @return the parsed name.
*/
private static List parseName(final String name, final boolean skipLast)
{
final ArrayList list = new ArrayList();
final StringTokenizer strTok = new StringTokenizer(name, "/");
while (strTok.hasMoreElements())
{
final String s = (String) strTok.nextElement();
if (s.length() != 0)
{
list.add(s);
}
}
if (skipLast && list.isEmpty() == false)
{
list.remove(list.size() - 1);
}
return list;
}
/**
* Extracts the file name from a path name.
*
* @param file the path name.
* @return the extracted filename.
*/
public static String getFileName(final String file)
{
final int last = file.lastIndexOf('/');
if (last < 0)
{
return file;
}
return file.substring(last + 1);
}
}
|
