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comparison src/com/go/trove/classfile/ExceptionsAttr.java @ 0:3dc0c5604566

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Initial checkin of blitz 2.0 fcs - no installer yet.
author Dan Creswell <dan.creswell@gmail.com>
date Sat, 21 Mar 2009 11:00:06 +0000
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1 /* ====================================================================
2 * Trove - Copyright (c) 1997-2000 Walt Disney Internet Group
3 * ====================================================================
4 * The Tea Software License, Version 1.1
5 *
6 * Copyright (c) 2000 Walt Disney Internet Group. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. The end-user documentation included with the redistribution,
21 * if any, must include the following acknowledgment:
22 * "This product includes software developed by the
23 * Walt Disney Internet Group (http://opensource.go.com/)."
24 * Alternately, this acknowledgment may appear in the software itself,
25 * if and wherever such third-party acknowledgments normally appear.
26 *
27 * 4. The names "Tea", "TeaServlet", "Kettle", "Trove" and "BeanDoc" must
28 * not be used to endorse or promote products derived from this
29 * software without prior written permission. For written
30 * permission, please contact opensource@dig.com.
31 *
32 * 5. Products derived from this software may not be called "Tea",
33 * "TeaServlet", "Kettle" or "Trove", nor may "Tea", "TeaServlet",
34 * "Kettle", "Trove" or "BeanDoc" appear in their name, without prior
35 * written permission of the Walt Disney Internet Group.
36 *
37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
40 * DISCLAIMED. IN NO EVENT SHALL THE WALT DISNEY INTERNET GROUP OR ITS
41 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
42 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
43 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
44 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
45 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
46 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
47 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
48 * ====================================================================
49 *
50 * For more information about Tea, please see http://opensource.go.com/.
51 */
52
53 package com.go.trove.classfile;
54
55 import java.util.*;
56 import java.io.*;
57
58 /******************************************************************************
59 * This class corresponds to the Exceptions_attribute structure as defined in
60 * section 4.7.5 of <i>The Java Virtual Machine Specification</i>.
61 *
62 * @author Brian S O'Neill
63 * @version
64 * <!--$$Revision: 1.1 $-->, <!--$$JustDate:--> 00/11/27 <!-- $-->
65 */
66 class ExceptionsAttr extends Attribute {
67 private List mExceptions = new ArrayList(2);
68
69 public ExceptionsAttr(ConstantPool cp) {
70 super(cp, EXCEPTIONS);
71 }
72
73 public String[] getExceptions() {
74 int size = mExceptions.size();
75 String[] names = new String[size];
76
77 for (int i=0; i<size; i++) {
78 names[i] = ((ConstantClassInfo)mExceptions.get(i)).getClassName();
79 }
80
81 return names;
82 }
83
84 public void addException(ConstantClassInfo type) {
85 mExceptions.add(type);
86 }
87
88 public int getLength() {
89 return 2 + 2 * mExceptions.size();
90 }
91
92 public void writeDataTo(DataOutput dout) throws IOException {
93 int size = mExceptions.size();
94 dout.writeShort(size);
95 for (int i=0; i<size; i++) {
96 ConstantClassInfo info = (ConstantClassInfo)mExceptions.get(i);
97 dout.writeShort(info.getIndex());
98 }
99 }
100
101 static Attribute define(ConstantPool cp,
102 String name,
103 int length,
104 DataInput din) throws IOException {
105
106 ExceptionsAttr attr = new ExceptionsAttr(cp);
107
108 int size = din.readUnsignedShort();
109 length -= 2;
110
111 for (int i=0; i<size; i++) {
112 int index = din.readUnsignedShort();
113 length -= 2;
114 ConstantClassInfo info = (ConstantClassInfo)cp.getConstant(index);
115 attr.addException(info);
116 }
117
118 if (length > 0) {
119 din.skipBytes(length);
120 }
121
122 return attr;
123 }
124 }