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


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.Array JavaDoc;
53 import java.util.ArrayList JavaDoc;
54
55 /**
56  * Deserializing a Java array
57  */

58 public class ArrayDeserializer extends AbstractListDeserializer {
59   private Class JavaDoc _componentType;
60   
61   public ArrayDeserializer(Deserializer componentDeserializer)
62   {
63     if (componentDeserializer != null)
64       _componentType = componentDeserializer.getType();
65   }
66
67   public Class JavaDoc getType()
68   {
69     if (_componentType == null || _componentType.getName() == null) {
70       return Object JavaDoc[].class;
71     }
72     
73     try {
74       return Class.forName("[" + getArrayClassName(_componentType));
75     } catch (ClassNotFoundException JavaDoc e) {
76       return Object JavaDoc[].class;
77     }
78   }
79
80   private static String JavaDoc getArrayClassName(Class JavaDoc cl)
81   {
82     if (cl.isArray())
83       return "[" + getArrayClassName(cl.getComponentType());
84     else
85       return "L" + cl.getName() + ";";
86   }
87
88   /**
89    * Reads the array.
90    */

91   public Object JavaDoc readList(AbstractHessianInput in, int length)
92     throws IOException JavaDoc
93   {
94     if (length >= 0) {
95       Object JavaDoc []data = createArray(length);
96
97       in.addRef(data);
98       
99       if (_componentType != null) {
100         for (int i = 0; i < data.length; i++)
101           data[i] = in.readObject(_componentType);
102       }
103       else {
104         for (int i = 0; i < data.length; i++)
105           data[i] = in.readObject();
106       }
107
108       in.readListEnd();
109
110       return data;
111     }
112     else {
113       ArrayList JavaDoc list = new ArrayList JavaDoc();
114
115       in.addRef(list);
116
117       if (_componentType != null) {
118         while (! in.isEnd())
119           list.add(in.readObject(_componentType));
120       }
121       else {
122         while (! in.isEnd())
123           list.add(in.readObject());
124       }
125
126       in.readListEnd();
127
128       Object JavaDoc []data = createArray(list.size());
129       for (int i = 0; i < data.length; i++)
130         data[i] = list.get(i);
131
132       return data;
133     }
134   }
135
136   /**
137    * Reads the array.
138    */

139   public Object JavaDoc readLengthList(AbstractHessianInput in, int length)
140     throws IOException JavaDoc
141   {
142     Object JavaDoc []data = createArray(length);
143
144     in.addRef(data);
145       
146     if (_componentType != null) {
147       for (int i = 0; i < data.length; i++)
148     data[i] = in.readObject(_componentType);
149     }
150     else {
151       for (int i = 0; i < data.length; i++)
152     data[i] = in.readObject();
153     }
154
155     return data;
156   }
157
158   protected Object JavaDoc []createArray(int length)
159   {
160     if (_componentType != null)
161       return (Object JavaDoc []) Array.newInstance(_componentType, length);
162     else
163       return new Object JavaDoc[length];
164   }
165
166   public String JavaDoc toString()
167   {
168     return "ArrayDeserializer[" + _componentType + "]";
169   }
170 }
171
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