1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.dx.cf.attrib;
18
19import com.android.dx.rop.type.TypeList;
20import com.android.dx.util.MutabilityException;
21
22/**
23 * Attribute class for standard {@code Exceptions} attributes.
24 */
25public final class AttExceptions extends BaseAttribute {
26    /** {@code non-null;} attribute name for attributes of this type */
27    public static final String ATTRIBUTE_NAME = "Exceptions";
28
29    /** {@code non-null;} list of exception classes */
30    private final TypeList exceptions;
31
32    /**
33     * Constructs an instance.
34     *
35     * @param exceptions {@code non-null;} list of classes, presumed but not
36     * verified to be subclasses of {@code Throwable}
37     */
38    public AttExceptions(TypeList exceptions) {
39        super(ATTRIBUTE_NAME);
40
41        try {
42            if (exceptions.isMutable()) {
43                throw new MutabilityException("exceptions.isMutable()");
44            }
45        } catch (NullPointerException ex) {
46            // Translate the exception.
47            throw new NullPointerException("exceptions == null");
48        }
49
50        this.exceptions = exceptions;
51    }
52
53    /** {@inheritDoc} */
54    public int byteLength() {
55        return 8 + exceptions.size() * 2;
56    }
57
58    /**
59     * Gets the list of classes associated with this instance. In
60     * general, these classes are not pre-verified to be subclasses of
61     * {@code Throwable}.
62     *
63     * @return {@code non-null;} the list of classes
64     */
65    public TypeList getExceptions() {
66        return exceptions;
67    }
68}
69