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


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.Value;
34 import com.caucho.quercus.expr.Expr;
35 import com.caucho.quercus.program.JavaClassDef;
36 import com.caucho.util.L10N;
37
38 /**
39  * Code for marshaling arguments.
40  */
41 public class JavaMarshal extends Marshal {
42   private static final L10N L = new L10N(JavaMarshal.class);
43
44   protected final JavaClassDef _def;
45   protected final boolean _isNotNull;
46   protected final boolean _isUnmarshalNullAsFalse;
47
48   public JavaMarshal(JavaClassDef def,
49                       boolean isNotNull)
50   {
51     this(def, isNotNull, false);
52   }
53
54   public JavaMarshal(JavaClassDef def,
55                       boolean isNotNull,
56                       boolean isUnmarshalNullAsFalse)
57   {
58     _def = def;
59     _isNotNull = isNotNull;
60     _isUnmarshalNullAsFalse = isUnmarshalNullAsFalse;
61   }
62
63   public Object JavaDoc marshal(Env env, Expr expr, Class JavaDoc argClass)
64   {
65     Value value = expr.eval(env);
66
67     return marshal(env, value, argClass);
68   }
69
70   public Object JavaDoc marshal(Env env, Value value, Class JavaDoc argClass)
71   {
72     if (! value.isset()) {
73       if (_isNotNull) {
74         env.warning(L.l("null is an unexpected argument, expected {0}",
75                         shortName(argClass)));
76       }
77
78       return null;
79     }
80
81     Object JavaDoc obj = value.toJavaObject();
82
83     if (obj == null) {
84       if (_isNotNull) {
85         env.warning(L.l("null is an unexpected argument, expected {0}",
86                         shortName(argClass)));
87       }
88
89       return null;
90     }
91     else if (! argClass.isAssignableFrom(obj.getClass())) {
92       //env.error(L.l("Can't assign {0} to {1}", obj, argClass));
93 env.warning(L.l("'{0}' of type '{1}' is an unexpected argument, expected {2}", value, shortName(value.getClass()), shortName(argClass)));
94       return null;
95     }
96
97     return obj;
98   }
99
100   public Value unmarshal(Env env, Object JavaDoc value)
101   {
102     return env.wrapJava(value, _def, _isUnmarshalNullAsFalse);
103   }
104
105   protected final static String JavaDoc shortName(Class JavaDoc cl)
106   {
107     String JavaDoc name = cl.getName();
108
109     int p = name.lastIndexOf('.');
110
111     if (p > 0)
112       return name.substring(p + 1);
113     else
114       return name;
115   }
116 }
117
118
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