1 /* universalStreamable.java --
2    Copyright (C) 2005 Free Software Foundation, Inc.
3 
4 This file is part of GNU Classpath.
5 
6 GNU Classpath is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
9 any later version.
10 
11 GNU Classpath is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 General Public License for more details.
15 
16 You should have received a copy of the GNU General Public License
17 along with GNU Classpath; see the file COPYING.  If not, write to the
18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
19 02110-1301 USA.
20 
21 Linking this library statically or dynamically with other modules is
22 making a combined work based on this library.  Thus, the terms and
23 conditions of the GNU General Public License cover the whole
24 combination.
25 
26 As a special exception, the copyright holders of this library give you
27 permission to link this library with independent modules to produce an
28 executable, regardless of the license terms of these independent
29 modules, and to copy and distribute the resulting executable under
30 terms of your choice, provided that you also meet, for each linked
31 independent module, the terms and conditions of the license of that
32 module.  An independent module is a module which is not derived from
33 or based on this library.  If you modify this library, you may extend
34 this exception to your version of the library, but you are not
35 obligated to do so.  If you do not wish to do so, delete this
36 exception statement from your version. */
37 
38 
39 package gnu.CORBA;
40 
41 import gnu.CORBA.CDR.BufferredCdrInput;
42 import gnu.CORBA.CDR.BufferedCdrOutput;
43 
44 import org.omg.CORBA.BAD_OPERATION;
45 import org.omg.CORBA.MARSHAL;
46 import org.omg.CORBA.TypeCode;
47 import org.omg.CORBA.portable.InputStream;
48 import org.omg.CORBA.portable.OutputStream;
49 import org.omg.CORBA.portable.Streamable;
50 
51 import java.io.IOException;
52 
53 /**
54  * This class holds the abstract binary data array of the Streamable
55  * being stored. It is used to insert and extract into {@link Any} objects
56  * that have no holder, but have the helper classes.
57  * Encoding/decoding then must be performed by the helper. This class is
58  * defined as package private because it is not idiot proof and
59  * must be used with care.
60  *
61  * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
62  */
63 public class GeneralHolder
64   implements Streamable
65 {
66   /**
67    * The binary data, stored inside this holder.
68    */
69   private BufferedCdrOutput value = new BufferedCdrOutput();
70 
71   /**
72    * Create the universal holder that uses the given buffer to store the data.
73    */
GeneralHolder(BufferedCdrOutput buffer)74   public GeneralHolder(BufferedCdrOutput buffer)
75   {
76     value = buffer;
77   }
78 
79   /**
80    * Reads into the internal buffer till the end of stream is
81    * reached. No alignment operations are performed. This operation
82    * normally reads from the stream, where the single value,
83    * stored using {@link #_write}, is written.
84    *
85    * @throws MARSHALL, if the IOException is thrown during the
86    * stream operation.
87    */
_read(InputStream input)88   public void _read(InputStream input)
89   {
90     try
91       {
92         if (input instanceof BufferredCdrInput)
93           {
94             BufferredCdrInput b = (BufferredCdrInput) input;
95             value.write(b.buffer.getBuffer());
96           }
97         else
98           {
99             int c;
100 
101             do
102               {
103                 c = input.read();
104                 if (c >= 0)
105                   value.write(c);
106               }
107             while (c >= 0);
108           }
109       }
110     catch (IOException ex)
111       {
112         MARSHAL t = new MARSHAL();
113         t.minor = Minor.Any;
114         t.initCause(ex);
115         throw t;
116       }
117   }
118 
119   /**
120    * The type is not known and cannot be returned.
121    *
122    * @throws BAD_OPERATION, always.
123    */
_type()124   public TypeCode _type()
125   {
126     BAD_OPERATION bad = new BAD_OPERATION();
127     bad.minor = Minor.Inappropriate;
128     throw bad;
129   }
130 
131   /**
132    * Writes the binary data being stored into the given output
133    * stream. This operation supposes that the current stream
134    * position is 0 or satisfies the required alignments anyway.
135    *
136    * @throws MARSHAL if the IOExeption is thrown when writing the
137    * byte array.
138    */
_write(OutputStream output)139   public void _write(OutputStream output)
140   {
141     try
142       {
143         value.buffer.writeTo(output);
144       }
145     catch (IOException ex)
146       {
147         MARSHAL t = new MARSHAL();
148         t.minor = Minor.Any;
149         t.initCause(ex);
150         throw t;
151       }
152   }
153 
154   /**
155    * Get the input stream that reads the fields of the stored value.
156    */
getInputStream()157   InputStream getInputStream()
158   {
159     return value.create_input_stream();
160   }
161 
162   /**
163    * Clone.
164    */
Clone()165   public GeneralHolder Clone()
166   {
167     try
168       {
169         BufferedCdrOutput nb = new BufferedCdrOutput(value.buffer.size());
170         value.buffer.writeTo(nb);
171         return new GeneralHolder(nb);
172       }
173     catch (IOException ex)
174       {
175         throw new Unexpected(ex);
176       }
177   }
178 }
179