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