1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * https://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19
20 package org.apache.commons.compress.archivers.zip;
21
22 import java.io.IOException;
23 import java.io.OutputStream;
24
25 /**
26 * Abstraction over OutputStream which also allows random access writes.
27 */
28 // Keep package-private; consider for Apache Commons IO.
29 abstract class RandomAccessOutputStream extends OutputStream {
30
31 /**
32 * Gets the current position in this stream.
33 *
34 * @return current position.
35 * @throws IOException if an I/O error occurs
36 */
37 abstract long position() throws IOException;
38
39 @Override
40 public void write(final int b) throws IOException {
41 write(new byte[] { (byte) b });
42 }
43
44 /**
45 * Writes all given bytes at a position.
46 *
47 * @param position position in the stream
48 * @param bytes data to write
49 * @param offset offset of the start of data in param bytes
50 * @param len the length of data to write
51 * @throws IOException if an I/O error occurs.
52 */
53 abstract void writeAll(byte[] bytes, int offset, int len, long position) throws IOException;
54
55 /**
56 * Writes all given bytes at a position.
57 *
58 * @param position position in the stream
59 * @param bytes data to write
60 * @throws IOException if an I/O error occurs.
61 */
62 void writeAll(final byte[] bytes, final long position) throws IOException {
63 writeAll(bytes, 0, bytes.length, position);
64 }
65 }