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 /** 20 * Type of data descriptor that an entry has. Data descriptors are used if the CRC and sizing data 21 * is not known when the data is being written and cannot be placed in the file's local header. 22 * In those cases, after the file data itself, a data descriptor is placed after the entry's 23 * contents. 24 * <p> 25 * While the zip specification says the data descriptor should be used but it is optional. We 26 * record also whether the data descriptor contained the 4-byte signature at the start of the 27 * block or not. 28 */ 29 public enum DataDescriptorType { 30 /** 31 * The entry has no data descriptor. 32 */ 33 NO_DATA_DESCRIPTOR(0), 34 35 /** 36 * The entry has a data descriptor that does not contain a signature. 37 */ 38 DATA_DESCRIPTOR_WITHOUT_SIGNATURE(12), 39 40 /** 41 * The entry has a data descriptor that contains a signature. 42 */ 43 DATA_DESCRIPTOR_WITH_SIGNATURE(16); 44 45 /** 46 * The number of bytes the data descriptor spans. 47 */ 48 public int size; 49 50 /** 51 * Creates a new data descriptor. 52 * 53 * @param size the number of bytes the data descriptor spans 54 */ DataDescriptorType(int size)55 DataDescriptorType(int size) { 56 this.size = size; 57 } 58 } 59