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1   /*
2    * Copyright (c) 1996, 1997, Oracle and/or its affiliates. All rights reserved.
3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4    *
5    * This code is free software; you can redistribute it and/or modify it
6    * under the terms of the GNU General Public License version 2 only, as
7    * published by the Free Software Foundation.  Oracle designates this
8    * particular file as subject to the "Classpath" exception as provided
9    * by Oracle in the LICENSE file that accompanied this code.
10   *
11   * This code is distributed in the hope that it will be useful, but WITHOUT
12   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14   * version 2 for more details (a copy is included in the LICENSE file that
15   * accompanied this code).
16   *
17   * You should have received a copy of the GNU General Public License version
18   * 2 along with this work; if not, write to the Free Software Foundation,
19   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20   *
21   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22   * or visit www.oracle.com if you need additional information or have any
23   * questions.
24   */
25  /*
26   * COPYRIGHT goes here
27   */
28  
29  package sun.applet;
30  
31  import java.io.*;
32  import java.lang.reflect.Array;
33  
34  /**
35   * This subclass of ObjectInputStream delegates loading of classes to
36   * an existing ClassLoader.
37   */
38  
39  class AppletObjectInputStream extends ObjectInputStream
40  {
41      private AppletClassLoader loader;
42  
43      /**
44       * Loader must be non-null;
45       */
46  
47      public AppletObjectInputStream(InputStream in, AppletClassLoader loader)
48              throws IOException, StreamCorruptedException {
49  
50          super(in);
51          if (loader == null) {
52              throw new AppletIllegalArgumentException("appletillegalargumentexception.objectinputstream");
53  
54          }
55          this.loader = loader;
56      }
57  
58      /**
59       * Make a primitive array class
60       */
61  
62      private Class primitiveType(char type) {
63          switch (type) {
64          case 'B': return byte.class;
65          case 'C': return char.class;
66          case 'D': return double.class;
67          case 'F': return float.class;
68          case 'I': return int.class;
69          case 'J': return long.class;
70          case 'S': return short.class;
71          case 'Z': return boolean.class;
72          default: return null;
73          }
74      }
75  
76      /**
77       * Use the given ClassLoader rather than using the system class
78       */
79      protected Class resolveClass(ObjectStreamClass classDesc)
80          throws IOException, ClassNotFoundException {
81  
82          String cname = classDesc.getName();
83          if (cname.startsWith("[")) {
84              // An array
85              Class component;            // component class
86              int dcount;                 // dimension
87              for (dcount=1; cname.charAt(dcount)=='['; dcount++) ;
88              if (cname.charAt(dcount) == 'L') {
89                  component = loader.loadClass(cname.substring(dcount+1,
90                                                               cname.length()-1));
91              } else {
92                  if (cname.length() != dcount+1) {
93                      throw new ClassNotFoundException(cname);// malformed
94                  }
95                  component = primitiveType(cname.charAt(dcount));
96              }
97              int dim[] = new int[dcount];
98              for (int i=0; i<dcount; i++) {
99                  dim[i]=0;
100             }
101             return Array.newInstance(component, dim).getClass();
102         } else {
103             return loader.loadClass(cname);
104         }
105     }
106 }