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Java > Open Source Codes > com > caucho > xsl > fun > SystemPropertyFun


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.fun;
30
31 import com.caucho.xpath.Expr;
32 import com.caucho.xpath.ExprEnvironment;
33 import com.caucho.xpath.XPathException;
34 import com.caucho.xpath.XPathFun;
35 import com.caucho.xpath.pattern.AbstractPattern;
36
37 import org.w3c.dom.Node JavaDoc;
38
39 import java.util.ArrayList JavaDoc;
40
41 /**
42  * The system-property(...) function.
43  */
44 public class SystemPropertyFun extends XPathFun {
45   /**
46    * Evaluate the function.
47    *
48    * @param pattern The context pattern.
49    * @param args The evaluated arguments
50    */
51   public Object JavaDoc eval(Node JavaDoc node, ExprEnvironment env,
52              AbstractPattern pattern, ArrayList JavaDoc args)
53     throws XPathException
54   {
55     if (args.size() < 1)
56       return "";
57
58     String JavaDoc name = Expr.toString(args.get(0));
59
60     if (name.equals("xsl:version"))
61       return new Double JavaDoc(1.0);
62     else if (name.equals("xsl:vendor"))
63       return "Caucho Technology";
64     else if (name.equals("xsl:vendor-url"))
65       return "http://www.caucho.com";
66     else
67       return System.getProperty(name);
68   }
69 }
70
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