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


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.quercus.program.AbstractFunction;
37 import com.caucho.util.L10N;
38
39 import java.util.ArrayList JavaDoc;
40
41 /**
42  * Represents a PHP parent:: method call expression.
43  */
44 public class ClassMethodExpr extends Expr {
45   private static final L10N L = new L10N(ClassMethodExpr.class);
46
47   protected final String JavaDoc _className;
48   protected final String JavaDoc _name;
49   protected final Expr []_args;
50
51   protected boolean _isMethod;
52
53   public ClassMethodExpr(Location location, String JavaDoc className, String JavaDoc name, ArrayList JavaDoc<Expr> args)
54   {
55     super(location);
56     _className = className.intern();
57     
58     _name = name.intern();
59
60     _args = new Expr[args.size()];
61     args.toArray(_args);
62   }
63
64   public ClassMethodExpr(Location location, String JavaDoc className, String JavaDoc name, Expr []args)
65   {
66     super(location);
67     _className = className.intern();
68     
69     _name = name.intern();
70
71     _args = args;
72   }
73
74   public ClassMethodExpr(String JavaDoc className, String JavaDoc name, ArrayList JavaDoc<Expr> args)
75   {
76     this(Location.UNKNOWN, className, name, args);
77   }
78
79   public ClassMethodExpr(String JavaDoc className, String JavaDoc name, Expr []args)
80   {
81     this(Location.UNKNOWN, className, name, args);
82   }
83   
84   /**
85    * Evaluates the expression.
86    *
87    * @param env the calling environment.
88    *
89    * @return the expression value.
90    */
91   public Value eval(Env env)
92   {
93     QuercusClass cl = env.findClass(_className);
94
95     if (cl == null)
96       throw env.errorException(L.l("{0} is an unknown class", _className));
97
98     AbstractFunction fun = cl.findFunction(_name);
99
100     if (fun == null)
101       throw env.errorException(L.l("{0}::{1} is an unknown method",
102                    _className, _name));
103     
104     Value []values = new Value[_args.length];
105
106     for (int i = 0; i < values.length; i++)
107       values[i] = _args[i].eval(env);
108     
109     return fun.callMethod(env, env.getThis(), values);
110   }
111   
112   public String JavaDoc toString()
113   {
114     return _className + "::" + _name + "()";
115   }
116 }
117
118
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