01: /*
02: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
03: *
04: * This file is part of Resin(R) Open Source
05: *
06: * Each copy or derived work must preserve the copyright notice and this
07: * notice unmodified.
08: *
09: * 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;
34: import java.util.logging.Logger;
35:
36: /**
37: * Represents a generic attribute
38: */
39: public class SignatureAttribute extends Attribute {
40: static private final Logger log = Log
41: .open(SignatureAttribute.class);
42:
43: private String _signature;
44:
45: SignatureAttribute() {
46: super ("Signature");
47: }
48:
49: SignatureAttribute(String signature) {
50: super ("Signature");
51:
52: _signature = signature;
53: }
54:
55: /**
56: * Returns the signature.
57: */
58: public String getSignature() {
59: return _signature;
60: }
61:
62: /**
63: * Reads the signature.
64: */
65: public void read(ByteCodeParser in) throws IOException {
66: int length = in.readInt();
67:
68: if (length != 2)
69: throw new IOException("expected length of 2 at " + length);
70:
71: int code = in.readShort();
72: _signature = in.getUTF8(code);
73: }
74:
75: /**
76: * Writes the field to the output.
77: */
78: public void write(ByteCodeWriter out) throws IOException {
79: out.writeUTF8Const(getName());
80: out.writeInt(2);
81: out.writeUTF8Const(_signature);
82: }
83:
84: /**
85: * Clones the attribute
86: */
87: public Attribute export(JavaClass source, JavaClass target) {
88: ConstantPool cp = target.getConstantPool();
89:
90: cp.addUTF8(getName());
91: cp.addUTF8(_signature);
92:
93: return new SignatureAttribute(_signature);
94: }
95:
96: public String toString() {
97: return "SignatureAttribute[" + _signature + "]";
98: }
99: }
|