01: /*
02: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
03: *
04: * This file is part of Resin(R) Open Source
05: *
06: * Each copy or derived work must preserve the copyright notice and this
07: * notice unmodified.
08: *
09: * 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.AbstractVariableResolver;
32:
33: import javax.el.ELContext;
34: import javax.el.ELException;
35: import javax.el.ELResolver;
36: import javax.servlet.jsp.el.VariableResolver;
37:
38: /**
39: * Implementation of the expression evaluator.
40: */
41: public class ELContextAdapter extends ELContext {
42: private VariableResolver _resolver;
43: private ELResolver _elResolver = new ELResolverAdapter();
44:
45: /**
46: * Implements the expression.
47: */
48: ELContextAdapter(VariableResolver resolver) {
49: _resolver = resolver;
50: }
51:
52: public ELResolver getELResolver() {
53: return _elResolver;
54: }
55:
56: public javax.el.FunctionMapper getFunctionMapper() {
57: return null;
58: }
59:
60: public javax.el.VariableMapper getVariableMapper() {
61: return null;
62: }
63:
64: class ELResolverAdapter extends AbstractVariableResolver {
65: @Override
66: public Object getValue(ELContext context, Object base,
67: Object property) {
68: if (base == null && property instanceof String) {
69: if (context != null)
70: context.setPropertyResolved(true);
71:
72: try {
73: return _resolver.resolveVariable((String) property);
74: } catch (Exception e) {
75: throw new ELException(e);
76: }
77: } else
78: return null;
79: }
80:
81: }
82: }
|