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


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.env.Env;
34 import com.caucho.quercus.env.Value;
35 import com.caucho.vfs.Path;
36
37 /**
38  * Represents a PHP include statement
39  */
40 public class IncludeOnceExpr extends UnaryExpr {
41   protected Path _dir;
42   protected boolean _isRequire;
43   
44   public IncludeOnceExpr(Location location, Path sourceFile, Expr expr)
45   {
46     super(location, expr);
47
48     // XXX: issues with eval
49 if (! sourceFile.getScheme().equals("string"))
50       _dir = sourceFile.getParent();
51   }
52   
53   public IncludeOnceExpr(Location location, Path sourceFile, Expr expr, boolean isRequire)
54   {
55     this(location, sourceFile, expr);
56
57     _isRequire = isRequire;
58   }
59   
60   public IncludeOnceExpr(Path sourceFile, Expr expr)
61   {
62     this(Location.UNKNOWN, sourceFile, expr);
63   }
64   
65   public IncludeOnceExpr(Path sourceFile, Expr expr, boolean isRequire)
66   {
67     this(Location.UNKNOWN, sourceFile, expr, isRequire);
68   }
69   
70   /**
71    * Evaluates the expression.
72    *
73    * @param env the calling environment.
74    *
75    * @return the expression value.
76    */
77   public Value eval(Env env)
78   {
79     String JavaDoc name = _expr.evalString(env);
80       
81     // return env.include(_dir, name);
82 if (_dir != null)
83       return env.include(_dir, name, _isRequire, true);
84     else if (_isRequire)
85       return env.require_once(name);
86     else
87       return env.include_once(name);
88   }
89   
90   public String JavaDoc toString()
91   {
92     return _expr.toString();
93   }
94 }
95
96
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