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Java > Open Source Codes > com > quadcap > http > servlets > jsp > TagJsp


1 package com.quadcap.http.servlets.jsp;
2
3 /* Copyright 1999 - 2003 Quadcap Software. All rights reserved.
4  *
5  * This software is distributed under the Quadcap Free Software License.
6  * This software may be used or modified for any purpose, personal or
7  * commercial. Open Source redistributions are permitted. Commercial
8  * redistribution of larger works derived from, or works which bundle
9  * this software requires a "Commercial Redistribution License"; see
10  * http://www.quadcap.com/purchase.
11  *
12  * Redistributions qualify as "Open Source" under one of the following terms:
13  *
14  * Redistributions are made at no charge beyond the reasonable cost of
15  * materials and delivery.
16  *
17  * Redistributions are accompanied by a copy of the Source Code or by an
18  * irrevocable offer to provide a copy of the Source Code for up to three
19  * years at the cost of materials and delivery. Such redistributions
20  * must allow further use, modification, and redistribution of the Source
21  * Code under substantially the same terms as this license.
22  *
23  * Redistributions of source code must retain the copyright notices as they
24  * appear in each source code file, these license terms, and the
25  * disclaimer/limitation of liability set forth as paragraph 6 below.
26  *
27  * Redistributions in binary form must reproduce this Copyright Notice,
28  * these license terms, and the disclaimer/limitation of liability set
29  * forth as paragraph 6 below, in the documentation and/or other materials
30  * provided with the distribution.
31  *
32  * The Software is provided on an "AS IS" basis. No warranty is
33  * provided that the Software is free of defects, or fit for a
34  * particular purpose.
35  *
36  * Limitation of Liability. Quadcap Software shall not be liable
37  * for any damages suffered by the Licensee or any third party resulting
38  * from use of the Software.
39  */
40
41 import java.io.PrintWriter JavaDoc;
42
43 import org.xml.sax.AttributeList JavaDoc;
44
45 /**
46  * Useful base class for all JSP tag handlers.
47  *
48  * @author Stan Bailes
49  */
50 public abstract class TagJsp implements TagHandler, TagInstance {
51     TagContext context = null;
52     String JavaDoc tagName = null;
53
54     public TagJsp() {}
55
56     public TagJsp(TagContext context) {
57     this.context = context;
58     }
59
60     public abstract TagInstance makeInstance(TagContext context);
61
62     public String JavaDoc getTagName() { return tagName; }
63
64     public void doStartTag(String JavaDoc tagName, AttributeList JavaDoc attributes)
65     throws JspException
66     {
67     this.tagName = tagName;
68     }
69
70     public void doEndTag() throws JspException {}
71
72     public void doCharacters(char[] ch, int off, int cnt)
73     throws JspException
74     {
75     }
76
77     public void doTemplateCharacters(char[] ch, int off, int cnt) {
78     PrintWriter JavaDoc w = context.getPrintWriter();
79
80     w.print("out.print(\"");
81     for (int i = 0; i < cnt; i++) {
82         char c = ch[off + i];
83         switch (c) {
84         case '\n':
85         w.print("\\n");
86         break;
87         case '\r':
88         w.print("\\r");
89         break;
90         case '\t':
91         w.print("\\t");
92         break;
93         case '\'':
94         w.print("\\'");
95         break;
96         case '\"':
97         w.print("\\\"");
98         break;
99         case '\\':
100         w.print("\\\\");
101         break;
102         default:
103         if (c > 0xfff) {
104             w.print("\\u");
105             w.print(Integer.toHexString(c));
106         } else if (c > 0xff) {
107             w.print("\\u0");
108             w.print(Integer.toHexString(c));
109         } else if (c <= 0x1f || c >= 0xf7f) {
110             w.print("\\u00");
111             w.print(Integer.toHexString(c));
112         } else {
113             w.print((char)c);
114         }
115         }
116     }
117     w.println("\");");
118     }
119
120     public static String JavaDoc toString(AttributeList JavaDoc attributes) {
121     StringBuffer JavaDoc sb = new StringBuffer JavaDoc();
122     for (int i = 0; i < attributes.getLength(); i++) {
123         sb.append(' ');
124         sb.append("[" + String.valueOf(i) + "]");
125         sb.append(attributes.getName(i));
126         sb.append("=\"");
127         sb.append(attributes.getValue(i));
128         sb.append("\"");
129     }
130     return sb.toString();
131     }
132 }
133
134
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