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Java > Open Source Codes > com > caucho > el > EnvironmentContext


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  *
23  * Free SoftwareFoundation, Inc.
24  * 59 Temple Place, Suite 330
25  * Boston, MA 02111-1307 USA
26  *
27  * @author Scott Ferguson
28  */
29
30 package com.caucho.el;
31
32 import javax.el.*;
33 import java.util.Map JavaDoc;
34
35 /**
36  * Creates a variable resolver based on the classloader.
37  */
38 public class EnvironmentContext extends ELContext {
39   private final StackELResolver _elResolver = new StackELResolver();
40   
41   /**
42    * Creates the resolver
43    */
44   public EnvironmentContext()
45   {
46     this(Thread.currentThread().getContextClassLoader());
47   }
48   
49   /**
50    * Creates the resolver
51    */
52   public EnvironmentContext(ClassLoader JavaDoc loader)
53   {
54     _elResolver.push(new ArrayELResolver());
55     _elResolver.push(new MapELResolver());
56     _elResolver.push(new ListELResolver());
57     _elResolver.push(new BeanELResolver());
58     _elResolver.push(new SystemPropertiesResolver());
59
60     _elResolver.push(EnvironmentELResolver.create(loader));
61   }
62   
63   /**
64    * Creates the resolver
65    */
66   public EnvironmentContext(Map JavaDoc<String JavaDoc,Object JavaDoc> map)
67   {
68     this();
69
70     _elResolver.push(new MapVariableResolver(map));
71   }
72
73   public ELResolver getELResolver()
74   {
75     return _elResolver;
76   }
77
78   public FunctionMapper getFunctionMapper()
79   {
80     return null;
81   }
82
83   public VariableMapper getVariableMapper()
84   {
85     return null;
86   }
87 }
88
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