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Java > Open Source Codes > com > caucho > quercus > program > CompiledFunction_N


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.program;
31
32 import com.caucho.quercus.env.Env;
33 import com.caucho.quercus.env.Value;
34 import com.caucho.quercus.expr.Expr;
35 import com.caucho.util.L10N;
36
37 import java.util.logging.Logger JavaDoc;
38
39 /**
40  * Represents a compiled function with N args
41  */

42 abstract public class CompiledFunction_N extends CompiledFunction {
43   private static final Logger JavaDoc log
44     = Logger.getLogger(CompiledFunction_N.class.getName());
45   private static final L10N L = new L10N(CompiledFunction_N.class);
46
47   private final String JavaDoc _name;
48   private final Expr []_defaultArgs;
49
50   public CompiledFunction_N(String JavaDoc name, Expr []defaultArgs)
51   {
52     _name = name;
53     _defaultArgs = defaultArgs;
54   }
55   
56   /**
57    * Binds the user's arguments to the actual arguments.
58    *
59    * @param args the user's arguments
60    * @return the user arguments augmented by any defaults
61    */

62   public Expr []bindArguments(Env env, Expr fun, Expr []args)
63   {
64     return args;
65   }
66
67   public final Value call(Env env, Value []argValues)
68   {
69     Value []args = argValues;
70
71     if (_defaultArgs.length != argValues.length) {
72       int len = _defaultArgs.length;
73       
74       if (len < argValues.length)
75     len = argValues.length;
76     
77       args = new Value[len];
78
79       System.arraycopy(argValues, 0, args, 0, argValues.length);
80
81       for (int i = argValues.length; i < _defaultArgs.length; i++) {
82     args[i] = _defaultArgs[i].eval(env);
83       }
84     }
85
86     return callImpl(env, args);
87   }
88
89   abstract public Value callImpl(Env env, Value []args);
90   
91   public String JavaDoc toString()
92   {
93     return "CompiledFunction_N[" + _name + "]";
94   }
95 }
96
97
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