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Java > Open Source Codes > com > caucho > quercus > function > ByteMarshal


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.function;
31
32 import com.caucho.quercus.env.Env;
33 import com.caucho.quercus.env.LongValue;
34 import com.caucho.quercus.env.Value;
35 import com.caucho.quercus.expr.Expr;
36
37 public class ByteMarshal extends Marshal
38 {
39   public static final Marshal MARSHAL = new ByteMarshal();
40
41   public boolean isLong()
42   {
43     return true;
44   }
45
46   public boolean isReadOnly()
47   {
48     return true;
49   }
50
51   public Object JavaDoc marshal(Env env, Expr expr, Class JavaDoc expectedClass)
52   {
53     return new Byte JavaDoc((byte) expr.evalLong(env));
54   }
55
56   public Object JavaDoc marshal(Env env, Value value, Class JavaDoc expectedClass)
57   {
58     return new Byte JavaDoc((byte) value.toLong());
59   }
60
61   public Value unmarshal(Env env, Object JavaDoc value)
62   {
63     if (value == null)
64       return LongValue.ZERO;
65     else
66       return new LongValue(((Number JavaDoc) value).longValue());
67   }
68 }
69
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