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


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.xsl.XslParseException;
33
34 import java.util.ArrayList JavaDoc;
35
36 /**
37  * Represents the xsl:choose element.
38  */
39 public class XslChoose extends XslNode {
40   private ArrayList JavaDoc<XslWhen> _tests = new ArrayList JavaDoc<XslWhen>();
41   private XslOtherwise _otherwise;
42
43   /**
44    * Returns the tag name.
45    */
46   public String JavaDoc getTagName()
47   {
48     return "xsl:choose";
49   }
50
51   /**
52    * Adds a child node.
53    */
54   public void addChild(XslNode node)
55     throws XslParseException
56   {
57     if (node instanceof XslWhen) {
58       _tests.add((XslWhen) node);
59     }
60     else if (node instanceof XslOtherwise) {
61       _otherwise = (XslOtherwise) node;
62     }
63     else
64       super.addChild(node);
65   }
66
67   /**
68    * Generates the code for the tag
69    *
70    * @param out the output writer for the generated java.
71    */
72   public void generate(JavaWriter out)
73     throws Exception JavaDoc
74   {
75     if (_tests.size() == 0) {
76       if (_otherwise != null)
77     _otherwise.generate(out);
78     }
79     else {
80       for (int i = 0; i < _tests.size(); i++) {
81     if (i != 0)
82       out.print("else ");
83
84     _tests.get(i).generate(out);
85       }
86
87       if (_otherwise != null) {
88     out.print("else ");
89     _otherwise.generate(out);
90       }
91     }
92   }
93 }
94
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