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


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.LongValue;
35 import com.caucho.quercus.env.Value;
36
37 /**
38  * Represents a PHP long literal expression.
39  */
40 public class LongLiteralExpr extends Expr {
41   protected final long _value;
42   protected final LongValue _objValue;
43
44   public LongLiteralExpr(Location location, long value)
45   {
46     super(location);
47     _value = value;
48     _objValue = new LongValue(_value);
49   }
50
51   public LongLiteralExpr(long value)
52   {
53     this(Location.UNKNOWN, value);
54   }
55
56   /**
57    * Returns true for a literal expression.
58    */
59   public boolean isLiteral()
60   {
61     return true;
62   }
63
64   /**
65    * Returns true for a long value.
66    */
67   public boolean isLong()
68   {
69     return true;
70   }
71
72   /**
73    * Evaluates the expression.
74    *
75    * @param env the calling environment.
76    *
77    * @return the expression value.
78    */
79   public Value eval(Env env)
80   {
81     return _objValue;
82   }
83
84   public String JavaDoc toString()
85   {
86     return String.valueOf(_value);
87   }
88 }
89
90
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