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Java > Open Source Codes > com > caucho > xsl > java > XslAttribute


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.xsl.java;
30
31 import com.caucho.java.JavaWriter;
32 import com.caucho.xml.QName;
33 import com.caucho.xsl.XslParseException;
34
35 import java.util.ArrayList JavaDoc;
36
37 /**
38  * Represents any XSL node from the stylesheet.
39  */
40 public class XslAttribute extends XslNode {
41   private String JavaDoc _name;
42   private String JavaDoc _namespace;
43
44   /**
45    * Returns the attribute name.
46    */
47   public String JavaDoc getName()
48   {
49     return _name;
50   }
51
52   /**
53    * Returns the attribute value.
54    */
55   public String JavaDoc getValue()
56   {
57     ArrayList JavaDoc<XslNode> children = getChildren();
58
59     if (children == null || children.size() == 0)
60       return "";
61
62     XslNode node = children.get(0);
63
64     if (node instanceof TextNode)
65       return ((TextNode) node).getText();
66     else
67       return "";
68   }
69   
70   /**
71    * Adds an attribute.
72    */
73   public void addAttribute(QName name, String JavaDoc value)
74     throws XslParseException
75   {
76     if (name.getName().equals("name"))
77       _name = value;
78     else if (name.getName().equals("namespace"))
79       _namespace = value;
80     else
81       super.addAttribute(name, value);
82   }
83
84   /**
85    * Ends the attributes.
86    */
87   public void endAttributes()
88     throws XslParseException
89   {
90     if (_name == null)
91       throw error(L.l("xsl:attribute needs a 'name' attribute."));
92   }
93
94   /**
95    * Generates the code for the tag
96    *
97    * @param out the output writer for the generated java.
98    */
99   public void generate(JavaWriter out)
100     throws Exception JavaDoc
101   {
102     if (hasChildren() || _namespace != null) {
103       String JavaDoc var = "_xsl_attr_" + generateId();
104
105       out.print("XMLWriter " + var + " = ");
106       
107       if (_namespace != null) {
108     out.print("out.pushAttributeNs(");
109     
110     generateString(out, _name, '+');
111       
112     out.print(", ");
113     generateString(out, _namespace, '+');
114     
115       
116     out.println(");");
117       }
118       else {
119     out.print("out.pushAttribute(");
120     
121     generateString(out, _name, '+');
122       
123     if (getOutputNamespace() != null) {
124       out.print(", ");
125       printNamespace(out, getOutputNamespace());
126     }
127     
128     out.println(");");
129       }
130       
131       generateChildren(out);
132     
133       out.println("out.popAttribute(" + var + ");");
134     }
135     else {
136       out.print("out.setAttribute(");
137     
138       generateString(out, _name, '+');
139
140       if (getOutputNamespace() != null) {
141     out.print(", ");
142     printNamespace(out, getOutputNamespace());
143       }
144
145       out.println(", \"\");");
146     }
147   }
148 }
149
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