content: /*
   * Copyright (C) 2018 The Android Open Source Project
   *
   * Licensed 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 android.app.backup;
  
  import android.app.backup.FullBackup.BackupScheme.PathWithRequiredFlags;
  
  import java.io.File;
  import java.io.IOException;
  import java.util.Collection;
  
  /** @hide */
  public class BackupUtils {
  
      private BackupUtils() {}
  
      /**
       * Returns {@code true} if {@code file} is either directly in {@code canonicalPathList} or is a
       * file contained in a directory in the list.
       */
      public static boolean isFileSpecifiedInPathList(
              File file, Collection<PathWithRequiredFlags> canonicalPathList) throws IOException {
          for (PathWithRequiredFlags canonical : canonicalPathList) {
              String canonicalPath = canonical.getPath();
              File fileFromList = new File(canonicalPath);
              if (fileFromList.isDirectory()) {
                  if (file.isDirectory()) {
                      // If they are both directories check exact equals.
                      if (file.equals(fileFromList)) {
                          return true;
                      }
                  } else {
                      // O/w we have to check if the file is within the directory from the list.
                      if (file.toPath().startsWith(canonicalPath)) {
                          return true;
                      }
                  }
              } else if (file.equals(fileFromList)) {
                  // Need to check the explicit "equals" so we don't end up with substrings.
                  return true;
              }
          }
          return false;
      }
  }
  