1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.tools.build.apkzlib.zip; 18 19 import javax.annotation.Nullable; 20 21 /** 22 * Enumeration with all known compression methods. 23 */ 24 public enum CompressionMethod { 25 /** 26 * STORE method: data is stored without any compression. 27 */ 28 STORE(0), 29 30 /** 31 * DEFLATE method: data is stored compressed using the DEFLATE algorithm. 32 */ 33 DEFLATE(8); 34 35 /** 36 * Code, within the zip file, that identifies this compression method. 37 */ 38 int methodCode; 39 40 /** 41 * Creates a new compression method. 42 * 43 * @param methodCode the code used in the zip file that identifies the compression method 44 */ CompressionMethod(int methodCode)45 CompressionMethod(int methodCode) { 46 this.methodCode = methodCode; 47 } 48 49 /** 50 * Obtains the compression method that corresponds to the provided code. 51 * 52 * @param code the code 53 * @return the method or {@code null} if no method has the provided code 54 */ 55 @Nullable fromCode(long code)56 static CompressionMethod fromCode(long code) { 57 for (CompressionMethod method : values()) { 58 if (method.methodCode == code) { 59 return method; 60 } 61 } 62 63 return null; 64 } 65 } 66