1 /*
 2  * Copyright (c) 1996, 2014, 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.
 8  *
 9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
16  * 2 along with this work; if not, write to the Free Software Foundation,
17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  */
23 package org.openjdk.asmtools.jasm;
24 
25 import java.io.IOException;
26 
27 /**
28  * AttrData
29  *
30  * AttrData is the base class for many attributes (or parts of attributes), and it is
31  * instantiated directly for simple attributes (like Synthetic or Deprecated).
32  */
33 class AttrData implements Data {
34 
35     private final ClassData clsData;
36     private final Argument attrNameCPX;
37 
38     AttrData(ClassData cdata, String name) {
39         clsData = cdata;
40         attrNameCPX = cdata.pool.FindCellAsciz(name);
41     }
42 
43     protected ClassData getClassData() {
44         return clsData;
45     }
46 
47     // full length of the attribute
48     // declared in Data
49     public int getLength() {
50         return 6 + attrLength();
51     }
52 
53     // subclasses must redefine this
54     public int attrLength() {
55         return 0;
56     }
57 
58     public void write(CheckedDataOutputStream out) throws IOException {
59         out.writeShort(attrNameCPX.arg);
60         out.writeInt(attrLength()); // attr len
61     }
62 } // end class AttrData
63