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Java > Open Source Codes > com > caucho > jsp > java > JstlXmlOut


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  * Free SoftwareFoundation, Inc.
23  * 59 Temple Place, Suite 330
24  * Boston, MA 02111-1307 USA
25  *
26  * @author Scott Ferguson
27  */
28
29 package com.caucho.jsp.java;
30
31 import com.caucho.jsp.JspParseException;
32 import com.caucho.vfs.WriteStream;
33 import com.caucho.xml.QName;
34
35 import java.io.IOException JavaDoc;
36
37 public class JstlXmlOut extends JstlNode {
38   private static final QName SELECT = new QName("select");
39   private static final QName ESCAPE_XML = new QName("escapeXml");
40   
41   private String JavaDoc _select;
42   
43   private String JavaDoc _escapeXml = "true";
44   private JspAttribute _escapeXmlAttr;
45   
46   /**
47    * Adds an attribute.
48    */
49   public void addAttribute(QName name, String JavaDoc value)
50     throws JspParseException
51   {
52     if (SELECT.equals(name))
53       _select = value;
54     else if (ESCAPE_XML.equals(name))
55       _escapeXml = value;
56     else
57       throw error(L.l("`{0}' is an unknown attribute for <{1}>.",
58                       name.getName(), getTagName()));
59   }
60   
61   /**
62    * Adds an attribute.
63    */
64   public void addAttribute(QName name, JspAttribute value)
65     throws JspParseException
66   {
67     if (ESCAPE_XML.equals(name))
68       _escapeXmlAttr = value;
69     else
70       throw error(L.l("`{0}' is an unknown attribute for <{1}>.",
71                       name.getName(), getTagName()));
72   }
73
74   /**
75    * Generates the XML text representation for the tag validation.
76    *
77    * @param os write stream to the generated XML.
78    */
79   public void printXml(WriteStream os)
80     throws IOException JavaDoc
81   {
82     os.print("<x:out");
83
84     if (_select != null) {
85       os.print(" select=\"");
86       printXmlText(os, _select);
87       os.print("\"");
88     }
89     os.print("/>");
90   }
91   
92   /**
93    * Generates the code for the c:out tag.
94    */
95   public void generate(JspJavaWriter out)
96     throws Exception JavaDoc
97   {
98     if (_select == null)
99       throw error(L.l("required attribute `select' missing from <{0}>",
100                       getTagName()));
101
102     String JavaDoc select = _gen.addXPathExpr(_select, getNamespaceContext());
103       
104     String JavaDoc escapeXml = "true";
105
106     if (_escapeXml != null)
107       escapeXml = generateValue(boolean.class, _escapeXml);
108     else if (_escapeXmlAttr != null)
109       escapeXml = _escapeXmlAttr.generateValue(String JavaDoc.class);
110
111     out.println("com.caucho.jstl.el.XmlOutTag.toStream(out, pageContext, " + select + ", " + escapeXml + ");");
112   }
113 }
114
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