ArrowChunkImpl


1   /**
2    * Dream
3    * Copyright (C) 2003-2004 INRIA Rhone-Alpes
4    *
5    * This library is free software; you can redistribute it and/or
6    * modify it under the terms of the GNU Lesser General Public
7    * License as published by the Free Software Foundation; either
8    * version 2 of the License, or (at your option) any later version.
9    *
10   * This library is distributed in the hope that it will be useful,
11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13   * Lesser General Public License for more details.
14   *
15   * You should have received a copy of the GNU Lesser General Public
16   * License along with this library; if not, write to the Free Software
17   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
18   *
19   * Contact: dream@objectweb.org
20   *
21   * Initial developer(s): Matthieu Leclercq
22   * Contributor(s): Vivien Quema
23   */
24  
25  package org.objectweb.dream.protocol;
26  
27  import java.io.Externalizable  ;
28  import java.io.IOException  ;
29  import java.io.ObjectInput  ;
30  import java.io.ObjectOutput  ;
31  
32  import org.objectweb.dream.message.AbstractChunk;
33  import org.objectweb.dream.message.Chunk;
34  import org.objectweb.dream.message.ChunkType;
35  
36  /**
37   * A basic Chunk interface that defines an arrow from a source process to a
38   * destination process.
39   */
40  public class ArrowChunkImpl extends AbstractChunk
41      implements
42        ArrowChunk,
43        Chunk,
44        Externalizable  
45  {
46  
47    private short processFrom;
48    private short processTo;
49  
50    // ---------------------------------------------------------------------------
51    // Implementation of the ArrowChunk interface
52    // ---------------------------------------------------------------------------
53  
54    /**
55     * @see ArrowChunk#getProcessIdFrom()
56     */
57    public short getProcessIdFrom()
58    {
59      return processFrom;
60    }
61  
62    /**
63     * @see ArrowChunk#setProcessIdFrom(short)
64     */
65    public void setProcessIdFrom(short from)
66    {
67      processFrom = from;
68    }
69  
70    /**
71     * @see ArrowChunk#getProcessIdTo()
72     */
73    public short getProcessIdTo()
74    {
75      return processTo;
76    }
77  
78    /**
79     * @see ArrowChunk#setProcessIdTo(short)
80     */
81    public void setProcessIdTo(short to)
82    {
83      processTo = to;
84    }
85  
86    // ---------------------------------------------------------------------------
87    // Implementation of the Chunk interface
88    // ---------------------------------------------------------------------------
89  
90    /**
91     * @see Chunk#getType()
92     */
93    public ChunkType getType()
94    {
95      return ArrowChunk.TYPE;
96    }
97  
98    /**
99     * @see Chunk#recycle()
100    */
101   public void recycle()
102   {
103   }
104 
105   /**
106    * @see Chunk#transfertState(Chunk)
107    */
108   public void transfertState(Chunk newInstance)
109   {
110     ArrowChunk newInst = (ArrowChunk) newInstance;
111     newInst.setProcessIdFrom(getProcessIdFrom());
112     newInst.setProcessIdTo(getProcessIdTo());
113   }
114 
115   // ---------------------------------------------------------------------------
116   // Implementation of the serialization methods
117   // ---------------------------------------------------------------------------
118 
119   /**
120    * @see Externalizable#readExternal(ObjectInput)
121    */
122   public void readExternal(ObjectInput   in) throws IOException  ,
123       ClassNotFoundException  
124   {
125     processFrom = in.readShort();
126     processTo = in.readShort();
127   }
128 
129   /**
130    * @see Externalizable#writeExternal(ObjectOutput)
131    */
132   public void writeExternal(ObjectOutput   out) throws IOException  
133   {
134     out.writeShort(processFrom);
135     out.writeShort(processTo);
136   }
137 
138 }
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