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Java > Open Source Codes > com > caucho > jsp > el > JspELParser


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.el;
30
31 import com.caucho.el.ELParser;
32 import com.caucho.el.Expr;
33
34 import javax.el.ELContext;
35
36 /**
37  * Parses the expression.
38  */
39 public class JspELParser extends ELParser {
40   /**
41    * Creates a new JspELParser
42    */
43   public JspELParser(ELContext env, String JavaDoc string)
44   {
45     super(env, string);
46   }
47
48   protected ELParser create(String JavaDoc string)
49   {
50     ELParser parser = new JspELParser(_elContext, string);
51
52     copyTo(parser);
53
54     return parser;
55   }
56
57   /**
58    * Creates the implicit object for the name.
59    */
60   protected Expr createImplicitObjectExpr(String JavaDoc name)
61   {
62     if (name.equals("pageContext") ||
63         name.equals("applicationScope") ||
64         name.equals("sessionScope") ||
65         name.equals("requestScope") ||
66         name.equals("pageScope") ||
67         name.equals("param") ||
68         name.equals("paramValues") ||
69         name.equals("header") ||
70         name.equals("headerValues") ||
71         name.equals("cookie") ||
72         name.equals("initParam"))
73       return new ImplicitObjectExpr(name);
74     else
75       return null;
76   }
77 }
78
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