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: *
23: * Free Software Foundation, Inc.
24: * 59 Temple Place, Suite 330
25: * Boston, MA 02111-1307 USA
26: *
27: * @author Sam
28: */
29:
30: package com.caucho.server.rewrite;
31:
32: import com.caucho.el.ELParser;
33: import com.caucho.el.Expr;
34: import com.caucho.util.L10N;
35:
36: import javax.el.ELContext;
37: import javax.servlet.http.HttpServletRequest;
38: import javax.servlet.http.HttpServletResponse;
39:
40: /**
41: * A {@link RewriteDispatch} condition that is an el expression.
42: */
43: public class ExprCondition extends AbstractCondition {
44: private static final L10N L = new L10N(ExprCondition.class);
45:
46: private Expr _expr;
47:
48: public ExprCondition(String expr) {
49: ELContext elContext = new RewriteELContext();
50:
51: _expr = new ELParser(elContext, expr).parse();
52: }
53:
54: public String getTagName() {
55: return "expr";
56: }
57:
58: public boolean isMatch(HttpServletRequest request,
59: HttpServletResponse response) {
60: return _expr.evalBoolean(new RewriteELContext());
61: }
62: }
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