Exceptions_attribute.java revision 2942:08092deced3f 
1/*
2 * Copyright (c) 2007, 2008, 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.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package com.sun.tools.classfile;
27
28import java.io.IOException;
29
30/**
31 * See JVMS, section 4.8.5.
32 *
33 *  <p><b>This is NOT part of any supported API.
34 *  If you write code that depends on this, you do so at your own risk.
35 *  This code and its internal interfaces are subject to change or
36 *  deletion without notice.</b>
37 */
38public class Exceptions_attribute extends Attribute {
39    Exceptions_attribute(ClassReader cr, int name_index, int length) throws IOException {
40        super(name_index, length);
41        number_of_exceptions = cr.readUnsignedShort();
42        exception_index_table = new int[number_of_exceptions];
43        for (int i = 0; i < number_of_exceptions; i++)
44            exception_index_table[i] = cr.readUnsignedShort();
45    }
46
47    public Exceptions_attribute(ConstantPool constant_pool, int[] exception_index_table)
48            throws ConstantPoolException {
49        this(constant_pool.getUTF8Index(Attribute.Exceptions), exception_index_table);
50    }
51
52    public Exceptions_attribute(int name_index, int[] exception_index_table) {
53        super(name_index, 2 + 2 * exception_index_table.length);
54        this.number_of_exceptions = exception_index_table.length;
55        this.exception_index_table = exception_index_table;
56    }
57
58    public String getException(int index, ConstantPool constant_pool) throws ConstantPoolException {
59        int exception_index = exception_index_table[index];
60        return constant_pool.getClassInfo(exception_index).getName();
61    }
62
63    public <R, D> R accept(Visitor<R, D> visitor, D data) {
64        return visitor.visitExceptions(this, data);
65    }
66
67    public final int number_of_exceptions;
68    public final int[] exception_index_table;
69}
70