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Java > Open Source Codes > com > caucho > quercus > expr > ExitExpr


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 Software Foundation, Inc.
24  * 59 Temple Place, Suite 330
25  * Boston, MA 02111-1307 USA
26  *
27  * @author Scott Ferguson
28  */

29
30 package com.caucho.quercus.expr;
31
32 import com.caucho.quercus.Location;
33 import com.caucho.quercus.QuercusExitException;
34 import com.caucho.quercus.env.Env;
35 import com.caucho.quercus.env.Value;
36
37 import java.io.IOException JavaDoc;
38
39 /**
40  * Represents the exit expression
41  */

42 public class ExitExpr extends Expr {
43   protected final Expr _value;
44
45   public ExitExpr(Location location, Expr value)
46   {
47     super(location);
48     _value = value;
49   }
50
51   public ExitExpr(Location location)
52   {
53     super(location);
54     _value = null;
55   }
56
57   public ExitExpr(Expr value)
58   {
59     _value = value;
60   }
61
62   public ExitExpr()
63   {
64     _value = null;
65   }
66
67   /**
68    * Evaluates the expression.
69    *
70    * @param env the calling environment.
71    *
72    * @return the expression value.
73    */

74   public Value eval(Env env)
75   {
76     try {
77       if (_value != null) {
78     String JavaDoc msg = _value.evalString(env);
79     
80     env.getOut().print(msg);
81     
82     throw new QuercusExitException(msg);
83       }
84     } catch (IOException JavaDoc e) {
85     }
86     throw new QuercusExitException();
87   }
88 }
89
90
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