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Java > Open Source Codes > com > caucho > hessian > io > StringValueDeserializer


1 /*
2  * Copyright (c) 2001-2004 Caucho Technology, Inc. All rights reserved.
3  *
4  * The Apache Software License, Version 1.1
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  *
10  * 1. Redistributions of source code must retain the above copyright
11  * notice, this list of conditions and the following disclaimer.
12  *
13  * 2. Redistributions in binary form must reproduce the above copyright
14  * notice, this list of conditions and the following disclaimer in
15  * the documentation and/or other materials provided with the
16  * distribution.
17  *
18  * 3. The end-user documentation included with the redistribution, if
19  * any, must include the following acknowlegement:
20  * "This product includes software developed by the
21  * Caucho Technology (http://www.caucho.com/)."
22  * Alternately, this acknowlegement may appear in the software itself,
23  * if and wherever such third-party acknowlegements normally appear.
24  *
25  * 4. The names "Hessian", "Resin", and "Caucho" must not be used to
26  * endorse or promote products derived from this software without prior
27  * written permission. For written permission, please contact
28  * info@caucho.com.
29  *
30  * 5. Products derived from this software may not be called "Resin"
31  * nor may "Resin" appear in their names without prior written
32  * permission of Caucho Technology.
33  *
34  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
35  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
36  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
37  * DISCLAIMED. IN NO EVENT SHALL CAUCHO TECHNOLOGY OR ITS CONTRIBUTORS
38  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
39  * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
40  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
41  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
42  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
43  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
44  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
45  *
46  * @author Scott Ferguson
47  */

48
49 package com.caucho.hessian.io;
50
51 import java.io.IOException JavaDoc;
52 import java.lang.reflect.Constructor JavaDoc;
53
54 /**
55  * Deserializing a string valued object
56  */

57 public class StringValueDeserializer extends AbstractDeserializer {
58   private Class JavaDoc _cl;
59   private Constructor JavaDoc _constructor;
60   
61   public StringValueDeserializer(Class JavaDoc cl)
62   {
63     try {
64       _cl = cl;
65       _constructor = cl.getConstructor(new Class JavaDoc[] { String JavaDoc.class });
66     } catch (Exception JavaDoc e) {
67       throw new RuntimeException JavaDoc(e);
68     }
69   }
70   
71   public Class JavaDoc getType()
72   {
73     return _cl;
74   }
75   
76   public Object JavaDoc readMap(AbstractHessianInput in)
77     throws IOException JavaDoc
78   {
79     String JavaDoc value = null;
80     
81     while (! in.isEnd()) {
82       String JavaDoc key = in.readString();
83
84       if (key.equals("value"))
85         value = in.readString();
86       else
87     in.readObject();
88     }
89
90     in.readMapEnd();
91
92     return create(value);
93   }
94   
95   public Object JavaDoc readObject(AbstractHessianInput in, String JavaDoc []fieldNames)
96     throws IOException JavaDoc
97   {
98     String JavaDoc value = null;
99
100     for (int i = 0; i < fieldNames.length; i++) {
101       if ("value".equals(fieldNames[i]))
102         value = in.readString();
103       else
104     in.readObject();
105     }
106
107     return create(value);
108   }
109
110   private Object JavaDoc create(String JavaDoc value)
111     throws IOException JavaDoc
112   {
113     if (value == null)
114       throw new IOException JavaDoc(_cl.getName() + " expects name.");
115
116     try {
117       return _constructor.newInstance(new Object JavaDoc[] { value });
118     } catch (Exception JavaDoc e) {
119       throw new IOExceptionWrapper(e);
120     }
121   }
122 }
123
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