| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.commons.compress.archivers.zip; |
| |
| /** |
| * Wrapper for extra field data that doesn't conform to the recommended format of header-tag + size + data. |
| * |
| * <p>The header-id is artificial (and not listed as a known ID in <a |
| * href="http://www.pkware.com/documents/casestudies/APPNOTE.TXT">APPNOTE.TXT</a>). Since it isn't used anywhere |
| * except to satisfy the ZipExtraField contract it shouldn't matter anyway.</p> |
| * |
| * @since 1.1 |
| * @NotThreadSafe |
| */ |
| public final class UnparseableExtraFieldData implements ZipExtraField { |
| private static final ZipShort HEADER_ID = new ZipShort(0xACC1); |
| |
| private byte[] localFileData; |
| private byte[] centralDirectoryData; |
| |
| /** |
| * The Header-ID. |
| * |
| * @return a completely arbitrary value that should be ignored. |
| */ |
| @Override |
| public ZipShort getHeaderId() { |
| return HEADER_ID; |
| } |
| |
| /** |
| * Length of the complete extra field in the local file data. |
| * |
| * @return The LocalFileDataLength value |
| */ |
| @Override |
| public ZipShort getLocalFileDataLength() { |
| return new ZipShort(localFileData == null ? 0 : localFileData.length); |
| } |
| |
| /** |
| * Length of the complete extra field in the central directory. |
| * |
| * @return The CentralDirectoryLength value |
| */ |
| @Override |
| public ZipShort getCentralDirectoryLength() { |
| return centralDirectoryData == null |
| ? getLocalFileDataLength() |
| : new ZipShort(centralDirectoryData.length); |
| } |
| |
| /** |
| * The actual data to put into local file data. |
| * |
| * @return The LocalFileDataData value |
| */ |
| @Override |
| public byte[] getLocalFileDataData() { |
| return ZipUtil.copy(localFileData); |
| } |
| |
| /** |
| * The actual data to put into central directory. |
| * |
| * @return The CentralDirectoryData value |
| */ |
| @Override |
| public byte[] getCentralDirectoryData() { |
| return centralDirectoryData == null |
| ? getLocalFileDataData() : ZipUtil.copy(centralDirectoryData); |
| } |
| |
| /** |
| * Populate data from this array as if it was in local file data. |
| * |
| * @param buffer the buffer to read data from |
| * @param offset offset into buffer to read data |
| * @param length the length of data |
| */ |
| @Override |
| public void parseFromLocalFileData(final byte[] buffer, final int offset, final int length) { |
| localFileData = new byte[length]; |
| System.arraycopy(buffer, offset, localFileData, 0, length); |
| } |
| |
| /** |
| * Populate data from this array as if it was in central directory data. |
| * |
| * @param buffer the buffer to read data from |
| * @param offset offset into buffer to read data |
| * @param length the length of data |
| */ |
| @Override |
| public void parseFromCentralDirectoryData(final byte[] buffer, final int offset, |
| final int length) { |
| centralDirectoryData = new byte[length]; |
| System.arraycopy(buffer, offset, centralDirectoryData, 0, length); |
| if (localFileData == null) { |
| parseFromLocalFileData(buffer, offset, length); |
| } |
| } |
| |
| } |