| /* |
| * 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; |
| |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.zip.ZipEntry; |
| |
| /** |
| * List of known compression methods |
| * |
| * Many of these methods are currently not supported by commons compress |
| * |
| * @since 1.5 |
| */ |
| public enum ZipMethod { |
| |
| /** |
| * Compression method 0 for uncompressed entries. |
| * |
| * @see ZipEntry#STORED |
| */ |
| STORED(ZipEntry.STORED), |
| |
| /** |
| * UnShrinking. |
| * dynamic Lempel-Ziv-Welch-Algorithm |
| * |
| * @see <a href="http://www.pkware.com/documents/casestudies/APPNOTE.TXT">Explanation of fields: compression |
| * method: (2 bytes)</a> |
| */ |
| UNSHRINKING(1), |
| |
| /** |
| * Reduced with compression factor 1. |
| * |
| * @see <a href="http://www.pkware.com/documents/casestudies/APPNOTE.TXT">Explanation of fields: compression |
| * method: (2 bytes)</a> |
| */ |
| EXPANDING_LEVEL_1(2), |
| |
| /** |
| * Reduced with compression factor 2. |
| * |
| * @see <a href="http://www.pkware.com/documents/casestudies/APPNOTE.TXT">Explanation of fields: compression |
| * method: (2 bytes)</a> |
| */ |
| EXPANDING_LEVEL_2(3), |
| |
| /** |
| * Reduced with compression factor 3. |
| * |
| * @see <a href="http://www.pkware.com/documents/casestudies/APPNOTE.TXT">Explanation of fields: compression |
| * method: (2 bytes)</a> |
| */ |
| EXPANDING_LEVEL_3(4), |
| |
| /** |
| * Reduced with compression factor 4. |
| * |
| * @see <a href="http://www.pkware.com/documents/casestudies/APPNOTE.TXT">Explanation of fields: compression |
| * method: (2 bytes)</a> |
| */ |
| EXPANDING_LEVEL_4(5), |
| |
| /** |
| * Imploding. |
| * |
| * @see <a href="http://www.pkware.com/documents/casestudies/APPNOTE.TXT">Explanation of fields: compression |
| * method: (2 bytes)</a> |
| */ |
| IMPLODING(6), |
| |
| /** |
| * Tokenization. |
| * |
| * @see <a href="http://www.pkware.com/documents/casestudies/APPNOTE.TXT">Explanation of fields: compression |
| * method: (2 bytes)</a> |
| */ |
| TOKENIZATION(7), |
| |
| /** |
| * Compression method 8 for compressed (deflated) entries. |
| * |
| * @see ZipEntry#DEFLATED |
| */ |
| DEFLATED(ZipEntry.DEFLATED), |
| |
| /** |
| * Compression Method 9 for enhanced deflate. |
| * |
| * @see <a href="http://www.winzip.com/wz54.htm">http://www.winzip.com/wz54.htm</a> |
| */ |
| ENHANCED_DEFLATED(9), |
| |
| /** |
| * PKWARE Data Compression Library Imploding. |
| * |
| * @see <a href="http://www.winzip.com/wz54.htm">http://www.winzip.com/wz54.htm</a> |
| */ |
| PKWARE_IMPLODING(10), |
| |
| /** |
| * Compression Method 12 for bzip2. |
| * |
| * @see <a href="http://www.winzip.com/wz54.htm">http://www.winzip.com/wz54.htm</a> |
| */ |
| BZIP2(12), |
| |
| /** |
| * Compression Method 14 for LZMA. |
| * |
| * @see <a href="http://www.7-zip.org/sdk.html">http://www.7-zip.org/sdk.html</a> |
| * @see <a href="http://www.winzip.com/wz54.htm">http://www.winzip.com/wz54.htm</a> |
| */ |
| LZMA(14), |
| |
| |
| /** |
| * Compression Method 96 for Jpeg compression. |
| * |
| * @see <a href="http://www.winzip.com/wz54.htm">http://www.winzip.com/wz54.htm</a> |
| */ |
| JPEG(96), |
| |
| /** |
| * Compression Method 97 for WavPack. |
| * |
| * @see <a href="http://www.winzip.com/wz54.htm">http://www.winzip.com/wz54.htm</a> |
| */ |
| WAVPACK(97), |
| |
| /** |
| * Compression Method 98 for PPMd. |
| * |
| * @see <a href="http://www.winzip.com/wz54.htm">http://www.winzip.com/wz54.htm</a> |
| */ |
| PPMD(98), |
| |
| |
| /** |
| * Compression Method 99 for AES encryption. |
| * |
| * @see <a href="http://www.winzip.com/wz54.htm">http://www.winzip.com/wz54.htm</a> |
| */ |
| AES_ENCRYPTED(99), |
| |
| /** |
| * Unknown compression method. |
| */ |
| UNKNOWN(); |
| |
| static final int UNKNOWN_CODE = -1; |
| |
| private final int code; |
| |
| private static final Map<Integer, ZipMethod> codeToEnum; |
| |
| static { |
| Map<Integer, ZipMethod> cte = new HashMap<Integer, ZipMethod>(); |
| for (ZipMethod method : values()) { |
| cte.put(method.getCode(), method); |
| } |
| codeToEnum = Collections.unmodifiableMap(cte); |
| } |
| |
| private ZipMethod() { |
| this(UNKNOWN_CODE); |
| } |
| |
| /** |
| * private constructor for enum style class. |
| */ |
| ZipMethod(int code) { |
| this.code = code; |
| } |
| |
| /** |
| * the code of the compression method. |
| * |
| * @see ZipArchiveEntry#getMethod() |
| * |
| * @return an integer code for the method |
| */ |
| public int getCode() { |
| return code; |
| } |
| |
| |
| /** |
| * returns the {@link ZipMethod} for the given code or null if the |
| * method is not known. |
| * @param code the code |
| * @return the {@link ZipMethod} for the given code or null if the |
| * method is not known. |
| */ |
| public static ZipMethod getMethodByCode(int code) { |
| return codeToEnum.get(code); |
| } |
| } |