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 tests.api.org.xml.sax.support;
18
19import java.io.IOException;
20import java.io.InputStream;
21
22/**
23 * Implements an InputStream what wraps another InputStream and throws an
24 * IOException after having read a specified number of bytes. Used for
25 * injecting IOExceptions on lower levels.
26 */
27public class BrokenInputStream extends InputStream {
28
29    private InputStream stream;
30
31    private int offset;
32
33    public BrokenInputStream(InputStream stream, int offset) {
34        super();
35
36        this.stream = stream;
37        this.offset = offset;
38    }
39
40    @Override
41    public int read() throws IOException {
42        if (offset == 0) {
43            throw new IOException("Injected exception");
44        }
45
46        offset--;
47        return stream.read();
48    }
49
50    @Override
51    public void close() throws IOException {
52        stream.close();
53    }
54}