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Java > Open Source Codes > org > apache > turbine > pipeline > PipelineUtil


1 package org.apache.turbine.pipeline;
2
3 /* ====================================================================
4  * The Apache Software License, Version 1.1
5  *
6  * Copyright (c) 2001 The Apache Software Foundation. All rights
7  * reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  *
13  * 1. Redistributions of source code must retain the above copyright
14  * notice, this list of conditions and the following disclaimer.
15  *
16  * 2. Redistributions in binary form must reproduce the above copyright
17  * notice, this list of conditions and the following disclaimer in
18  * the documentation and/or other materials provided with the
19  * distribution.
20  *
21  * 3. The end-user documentation included with the redistribution,
22  * if any, must include the following acknowledgment:
23  * "This product includes software developed by the
24  * Apache Software Foundation (http://www.apache.org/)."
25  * Alternately, this acknowledgment may appear in the software itself,
26  * if and wherever such third-party acknowledgments normally appear.
27  *
28  * 4. The names "Apache" and "Apache Software Foundation" and
29  * "Apache Turbine" must not be used to endorse or promote products
30  * derived from this software without prior written permission. For
31  * written permission, please contact apache@apache.org.
32  *
33  * 5. Products derived from this software may not be called "Apache",
34  * "Apache Turbine", nor may "Apache" appear in their name, without
35  * prior written permission of the Apache Software Foundation.
36  *
37  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
38  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
39  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
40  * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
41  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
43  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
44  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
45  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
46  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
47  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48  * SUCH DAMAGE.
49  * ====================================================================
50  *
51  * This software consists of voluntary contributions made by many
52  * individuals on behalf of the Apache Software Foundation. For more
53  * information on the Apache Software Foundation, please see
54  * <http://www.apache.org/>.
55  */
56
57  /*
58    perhaps this code should go someplace else.
59    The following classes use it:
60      + DefaultResolver
61      + ModuleRunner
62      + modules/ModuleLoader
63 */
64
65 /**
66  *
67  * @author <a HREF="mailto:mikeh@apache.org">Mike Haberman</a>
68  * @version $Id: PipelineUtil.java,v 1.1 2001/11/13 21:35:45 mikeh Exp $
69  */
70
71 public class PipelineUtil
72 {
73    private PipelineUtil()
74    {
75    }
76
77     /**
78      * Parse the template name collected from URL parameters or
79      * template context to a path name. Double slashes are changed
80      * into single ones and commas used as path delemiters in
81      * URL parameters are changed into slashes. Empty names or
82      * names without a file part are not accepted.
83      *
84      * @param template The template name.
85      * @param buffer A buffer for the result.
86      * @return The index of the separator between the path and the name.
87      * @exception Exception Malformed template name.
88      */
89
90     /*
91         TODO: it would be nice to cache this info
92     */
93     public static int parseTemplatePath(String JavaDoc template,StringBuffer JavaDoc buffer)
94         throws Exception JavaDoc
95     {
96         char c;
97         int j = 0;
98         int ind = -1;
99         buffer.setLength(0);
100         buffer.append(template);
101         int len = buffer.length();
102         while (j < len)
103         {
104             c = buffer.charAt(j);
105             if (c == ',')
106             {
107                 c = '/';
108                 buffer.setCharAt(j,c);
109             }
110             if (c == '/')
111             {
112                 ind = j;
113                 if (j < (len - 1))
114                 {
115                     c = buffer.charAt(j + 1);
116                     if ((c == '/') ||
117                         (c == ','))
118                     {
119                         buffer.deleteCharAt(j);
120                         len--;
121                         continue;
122                     }
123                 }
124             }
125             j++;
126         }
127         if ((len == 0) ||
128             (ind >= (len - 1)))
129         {
130             throw new Exception JavaDoc(
131                 "Syntax error in template name '" + template + '\'');
132         }
133         return ind;
134     }
135 }
136
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