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
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7 * the License. You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
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19 package org.apache.tools.zip;
21 import java.util.zip.ZipException;
24 * General format of extra field data.
27 * Extra fields usually appear twice per file, once in the local file data and
28 * once in the central directory. Usually they are the same, but they don't have
29 * to be. {@link java.util.zip.ZipOutputStream java.util.zip.ZipOutputStream}
30 * will only use the local file data in both places.
34 public interface ZipExtraField {
39 * @return the header id
42 ZipShort getHeaderId();
45 * Length of the extra field in the local file data - without Header-ID or
48 * @return the length of the field in the local file data
51 ZipShort getLocalFileDataLength();
54 * Length of the extra field in the central directory - without Header-ID or
57 * @return the length of the field in the central directory
60 ZipShort getCentralDirectoryLength();
63 * The actual data to put into local file data - without Header-ID or length
69 byte[] getLocalFileDataData();
72 * The actual data to put central directory - without Header-ID or length
78 byte[] getCentralDirectoryData();
81 * Populate data from this array as if it was in local file data.
88 * the number of bytes in the array from offset
91 * @throws ZipException
94 void parseFromLocalFileData(byte[] data, int offset, int length)