KickJava   Java API By Example, From Geeks To Geeks.

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


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.QuercusClass;
35 import com.caucho.quercus.env.Value;
36 import com.caucho.util.L10N;
37
38 /**
39  * Represents a PHP parent::FOO constant call expression.
40  */
41 public class ClassConstExpr extends Expr {
42   private static final L10N L = new L10N(ClassMethodExpr.class);
43
44   protected final String JavaDoc _className;
45   protected final String JavaDoc _name;
46
47   public ClassConstExpr(Location location, String JavaDoc className, String JavaDoc name)
48   {
49     super(location);
50     
51     _className = className.intern();
52     _name = name.intern();
53   }
54
55   public ClassConstExpr(String JavaDoc className, String JavaDoc name)
56   {
57     _className = className.intern();
58     _name = name.intern();
59   }
60   
61   /**
62    * Evaluates the expression.
63    *
64    * @param env the calling environment.
65    *
66    * @return the expression value.
67    */
68   public Value eval(Env env)
69   {
70     return eval(env, env.getClass(_className));
71   }
72
73   public Value eval(Env env, QuercusClass ownerClass)
74   {
75     return ownerClass.getConstant(env, _name);
76   }
77   
78   public String JavaDoc toString()
79   {
80     return _className + "::" + _name + "()";
81   }
82 }
83
84
Popular Tags