1 /* 2 * Copyright (C) 2018 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 android.app.backup; 18 19 import android.app.backup.FullBackup.BackupScheme.PathWithRequiredFlags; 20 21 import java.io.File; 22 import java.io.IOException; 23 import java.util.Collection; 24 25 /** @hide */ 26 public class BackupUtils { 27 BackupUtils()28 private BackupUtils() {} 29 30 /** 31 * Returns {@code true} if {@code file} is either directly in {@code canonicalPathList} or is a 32 * file contained in a directory in the list. 33 */ isFileSpecifiedInPathList( File file, Collection<PathWithRequiredFlags> canonicalPathList)34 public static boolean isFileSpecifiedInPathList( 35 File file, Collection<PathWithRequiredFlags> canonicalPathList) throws IOException { 36 for (PathWithRequiredFlags canonical : canonicalPathList) { 37 String canonicalPath = canonical.getPath(); 38 File fileFromList = new File(canonicalPath); 39 if (fileFromList.isDirectory()) { 40 if (file.isDirectory()) { 41 // If they are both directories check exact equals. 42 if (file.equals(fileFromList)) { 43 return true; 44 } 45 } else { 46 // O/w we have to check if the file is within the directory from the list. 47 if (file.toPath().startsWith(canonicalPath)) { 48 return true; 49 } 50 } 51 } else if (file.equals(fileFromList)) { 52 // Need to check the explicit "equals" so we don't end up with substrings. 53 return true; 54 } 55 } 56 return false; 57 } 58 } 59