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


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.NullValue;
35 import com.caucho.quercus.env.Value;
36 import com.caucho.quercus.program.AbstractFunction;
37 import com.caucho.util.L10N;
38
39 import java.util.ArrayList JavaDoc;
40
41 /**
42  * Represents a PHP function expression.
43  */
44 public class MethodCallExpr extends Expr {
45   private static final L10N L = new L10N(MethodCallExpr.class);
46
47   protected final Expr _objExpr;
48   
49   protected final String JavaDoc _name;
50   protected final Expr []_args;
51
52   public MethodCallExpr(Location location,
53             Expr objExpr,
54             String JavaDoc name,
55             ArrayList JavaDoc<Expr> args)
56   {
57     super(location);
58     _objExpr = objExpr;
59     
60     _name = name.intern();
61
62     _args = new Expr[args.size()];
63     args.toArray(_args);
64   }
65
66   public MethodCallExpr(Expr objExpr, String JavaDoc name, ArrayList JavaDoc<Expr> args)
67   {
68     this(Location.UNKNOWN, objExpr, name, args);
69   }
70
71   public String JavaDoc getName()
72   {
73     return _name;
74   }
75   
76   /**
77    * Evaluates the expression.
78    *
79    * @param env the calling environment.
80    *
81    * @return the expression value.
82    */
83   public Value eval(Env env)
84   {
85     env.checkTimeout();
86
87     Value obj = _objExpr.eval(env);
88
89     Value []args = new Value[_args.length];
90
91     for (int i = 0; i < _args.length; i++)
92       args[i] = _args[i].evalArg(env);
93
94     env.pushCall(this, obj);
95     
96     try {
97       env.checkTimeout();
98
99       return obj.callMethod(env, _name, args);
100     } finally {
101       env.popCall();
102     }
103   }
104   
105   /**
106    * Evaluates the expression.
107    *
108    * @param env the calling environment.
109    *
110    * @return the expression value.
111    */
112   public Value evalRef(Env env)
113   {
114     env.checkTimeout();
115
116     Value obj = _objExpr.eval(env);
117
118     Value []args = new Value[_args.length];
119
120     for (int i = 0; i < _args.length; i++)
121       args[i] = _args[i].evalArg(env);
122
123     env.pushCall(this, obj);
124     
125     try {
126       env.checkTimeout();
127
128       return obj.callMethodRef(env, _name, args);
129     } finally {
130       env.popCall();
131     }
132   }
133   
134   public String JavaDoc toString()
135   {
136     return _objExpr + "->" + _name + "()";
137   }
138 }
139
140
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