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


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.util.*;
53
54 /**
55  * Deserializing a JDK 1.2 Collection.
56  */
57 public class CollectionDeserializer extends AbstractListDeserializer {
58   private Class JavaDoc _type;
59   
60   public CollectionDeserializer(Class JavaDoc type)
61   {
62     _type = type;
63   }
64   
65   public Class JavaDoc getType()
66   {
67     return _type;
68   }
69   
70   public Object JavaDoc readList(AbstractHessianInput in, int length)
71     throws IOException JavaDoc
72   {
73     Collection list = null;
74     
75     if (_type == null)
76       list = new ArrayList();
77     else if (! _type.isInterface()) {
78       try {
79         list = (Collection) _type.newInstance();
80       } catch (Exception JavaDoc e) {
81       }
82     }
83
84     if (list != null) {
85     }
86     else if (SortedSet.class.isAssignableFrom(_type))
87       list = new TreeSet();
88     else if (Set.class.isAssignableFrom(_type))
89       list = new HashSet();
90     else if (List.class.isAssignableFrom(_type))
91       list = new ArrayList();
92     else if (Collection.class.isAssignableFrom(_type))
93       list = new ArrayList();
94     else {
95       try {
96         list = (Collection) _type.newInstance();
97       } catch (Exception JavaDoc e) {
98         throw new IOExceptionWrapper(e);
99       }
100     }
101
102     in.addRef(list);
103
104     while (! in.isEnd())
105       list.add(in.readObject());
106
107     in.readEnd();
108
109     return list;
110   }
111 }
112
113
114
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