KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > com > caucho > bytecode > SignatureAttribute


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  * Free SoftwareFoundation, Inc.
23  * 59 Temple Place, Suite 330
24  * Boston, MA 02111-1307 USA
25  *
26  * @author Scott Ferguson
27  */
28
29 package com.caucho.bytecode;
30
31 import com.caucho.log.Log;
32
33 import java.io.IOException JavaDoc;
34 import java.util.logging.Logger JavaDoc;
35
36 /**
37  * Represents a generic attribute
38  */
39 public class SignatureAttribute extends Attribute {
40   static private final Logger JavaDoc log = Log.open(SignatureAttribute.class);
41
42   private String JavaDoc _signature;
43
44   SignatureAttribute()
45   {
46     super("Signature");
47   }
48
49   SignatureAttribute(String JavaDoc signature)
50   {
51     super("Signature");
52
53     _signature = signature;
54   }
55
56   /**
57    * Returns the signature.
58    */
59   public String JavaDoc getSignature()
60   {
61     return _signature;
62   }
63
64   /**
65    * Reads the signature.
66    */
67   public void read(ByteCodeParser in)
68     throws IOException JavaDoc
69   {
70     int length = in.readInt();
71
72     if (length != 2)
73       throw new IOException JavaDoc("expected length of 2 at " + length);
74     
75     int code = in.readShort();
76     _signature = in.getUTF8(code);
77   }
78
79   /**
80    * Writes the field to the output.
81    */
82   public void write(ByteCodeWriter out)
83     throws IOException JavaDoc
84   {
85     out.writeUTF8Const(getName());
86     out.writeInt(2);
87     out.writeUTF8Const(_signature);
88   }
89
90   /**
91    * Clones the attribute
92    */
93   public Attribute export(JavaClass source, JavaClass target)
94   {
95     ConstantPool cp = target.getConstantPool();
96
97     cp.addUTF8(getName());
98     cp.addUTF8(_signature);
99     
100     return new SignatureAttribute(_signature);
101   }
102
103   public String JavaDoc toString()
104   {
105     return "SignatureAttribute[" + _signature + "]";
106   }
107 }
108
Popular Tags