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


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.quercus.parser.QuercusParser;
36 import com.caucho.util.L10N;
37
38 import java.util.ArrayList JavaDoc;
39
40 /**
41  * Represents a PHP function expression.
42  */
43 public class VarFunctionExpr extends Expr {
44   private static final L10N L = new L10N(FunctionExpr.class);
45   
46   protected final Expr _name;
47   protected final Expr []_args;
48
49   public VarFunctionExpr(Location location, Expr name, ArrayList JavaDoc<Expr> args)
50   {
51     super(location);
52     _name = name;
53
54     _args = new Expr[args.size()];
55     args.toArray(_args);
56   }
57
58   public VarFunctionExpr(Location location, Expr name, Expr []args)
59   {
60     super(location);
61     _name = name;
62
63     _args = args;
64   }
65
66   public VarFunctionExpr(Expr name, ArrayList JavaDoc<Expr> args)
67   {
68     this(Location.UNKNOWN, name, args);
69   }
70
71   public VarFunctionExpr(Expr name, Expr []args)
72   {
73     this(Location.UNKNOWN, name, args);
74   }
75
76   /**
77    * Returns the reference of the value.
78    * @param location
79    */
80   public Expr createRef(QuercusParser parser)
81   {
82     return parser.getFactory().createRef(this);
83   }
84
85   /**
86    * Returns the copy of the value.
87    * @param location
88    */
89   public Expr createCopy(ExprFactory factory)
90   {
91     return this;
92   }
93   
94   /**
95    * Evaluates the expression.
96    *
97    * @param env the calling environment.
98    *
99    * @return the expression value.
100    */
101   public Value eval(Env env)
102   {
103     return env.getFunction(_name.eval(env)).call(env, _args);
104   }
105   
106   /**
107    * Evaluates the expression.
108    *
109    * @param env the calling environment.
110    *
111    * @return the expression value.
112    */
113   public Value evalRef(Env env)
114   {
115     return env.getFunction(_name.eval(env)).callRef(env, _args);
116   }
117   
118   public String JavaDoc toString()
119   {
120     return _name + "()";
121   }
122 }
123
124
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