Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 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 com.android.server.role; |
| 18 | |
| 19 | import android.annotation.CheckResult; |
| 20 | import android.annotation.NonNull; |
| 21 | import android.annotation.Nullable; |
| 22 | import android.annotation.UserIdInt; |
| 23 | import android.annotation.WorkerThread; |
| 24 | import android.os.Environment; |
| 25 | import android.os.Handler; |
| 26 | import android.util.ArrayMap; |
| 27 | import android.util.ArraySet; |
| 28 | import android.util.AtomicFile; |
| 29 | import android.util.Slog; |
| 30 | import android.util.Xml; |
| 31 | |
| 32 | import com.android.internal.annotations.GuardedBy; |
| 33 | import com.android.internal.os.BackgroundThread; |
Eugene Susla | abdefba | 2018-11-09 18:06:43 -0800 | [diff] [blame^] | 34 | import com.android.internal.util.CollectionUtils; |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 35 | import com.android.internal.util.function.pooled.PooledLambda; |
| 36 | |
| 37 | import libcore.io.IoUtils; |
| 38 | |
| 39 | import org.xmlpull.v1.XmlPullParser; |
| 40 | import org.xmlpull.v1.XmlPullParserException; |
| 41 | import org.xmlpull.v1.XmlSerializer; |
| 42 | |
| 43 | import java.io.File; |
| 44 | import java.io.FileInputStream; |
| 45 | import java.io.FileNotFoundException; |
| 46 | import java.io.FileOutputStream; |
| 47 | import java.io.IOException; |
| 48 | import java.nio.charset.StandardCharsets; |
Hai Zhang | 8e60a8f | 2018-11-20 11:21:09 -0800 | [diff] [blame] | 49 | import java.util.List; |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 50 | |
| 51 | /** |
| 52 | * Stores the state of roles for a user. |
| 53 | */ |
| 54 | public class RoleUserState { |
| 55 | |
| 56 | private static final String LOG_TAG = RoleUserState.class.getSimpleName(); |
| 57 | |
| 58 | public static final int VERSION_UNDEFINED = -1; |
| 59 | |
| 60 | private static final String ROLES_FILE_NAME = "roles.xml"; |
| 61 | |
| 62 | private static final String TAG_ROLES = "roles"; |
| 63 | private static final String TAG_ROLE = "role"; |
| 64 | private static final String TAG_HOLDER = "holder"; |
| 65 | private static final String ATTRIBUTE_VERSION = "version"; |
| 66 | private static final String ATTRIBUTE_NAME = "name"; |
Eugene Susla | abdefba | 2018-11-09 18:06:43 -0800 | [diff] [blame^] | 67 | private static final String ATTRIBUTE_PACKAGES_HASH = "packagesHash"; |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 68 | |
| 69 | @UserIdInt |
| 70 | private final int mUserId; |
| 71 | |
| 72 | @GuardedBy("RoleManagerService.mLock") |
Hai Zhang | b295ac4 | 2018-11-16 16:08:18 -0800 | [diff] [blame] | 73 | private int mVersion; |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 74 | |
Eugene Susla | abdefba | 2018-11-09 18:06:43 -0800 | [diff] [blame^] | 75 | @GuardedBy("RoleManagerService.mLock") |
| 76 | private String mLastGrantPackagesHash = null; |
| 77 | |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 78 | /** |
| 79 | * Maps role names to its holders' package names. The values should never be null. |
| 80 | */ |
| 81 | @GuardedBy("RoleManagerService.mLock") |
Eugene Susla | abdefba | 2018-11-09 18:06:43 -0800 | [diff] [blame^] | 82 | @Nullable |
| 83 | private ArrayMap<String, ArraySet<String>> mRoles = null; |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 84 | |
| 85 | @GuardedBy("RoleManagerService.mLock") |
| 86 | private boolean mDestroyed; |
| 87 | |
| 88 | private final Handler mWriteHandler = new Handler(BackgroundThread.getHandler().getLooper()); |
| 89 | |
| 90 | public RoleUserState(@UserIdInt int userId) { |
| 91 | mUserId = userId; |
| 92 | } |
| 93 | |
| 94 | /** |
| 95 | * Get the version of this user state. |
| 96 | */ |
| 97 | @GuardedBy("RoleManagerService.mLock") |
| 98 | public int getVersionLocked() { |
| 99 | throwIfDestroyedLocked(); |
| 100 | return mVersion; |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * Set the version of this user state. |
| 105 | * |
| 106 | * @param version the version to set |
| 107 | */ |
| 108 | @GuardedBy("RoleManagerService.mLock") |
| 109 | public void setVersionLocked(int version) { |
| 110 | throwIfDestroyedLocked(); |
Hai Zhang | 8e60a8f | 2018-11-20 11:21:09 -0800 | [diff] [blame] | 111 | if (mVersion == version) { |
| 112 | return; |
| 113 | } |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 114 | mVersion = version; |
Hai Zhang | 8e60a8f | 2018-11-20 11:21:09 -0800 | [diff] [blame] | 115 | writeAsyncLocked(); |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 116 | } |
| 117 | |
| 118 | /** |
Eugene Susla | abdefba | 2018-11-09 18:06:43 -0800 | [diff] [blame^] | 119 | * Get the hash representing the state of packages during the last time initial grants was run |
| 120 | */ |
| 121 | @GuardedBy("RoleManagerService.mLock") |
| 122 | public String getLastGrantPackagesHashLocked() { |
| 123 | return mLastGrantPackagesHash; |
| 124 | } |
| 125 | |
| 126 | /** |
| 127 | * Set the hash representing the state of packages during the last time initial grants was run |
| 128 | */ |
| 129 | @GuardedBy("RoleManagerService.mLock") |
| 130 | public void setLastGrantPackagesHashLocked(String lastGrantPackagesHash) { |
| 131 | mLastGrantPackagesHash = lastGrantPackagesHash; |
| 132 | writeAsyncLocked(); |
| 133 | } |
| 134 | |
| 135 | /** |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 136 | * Get whether the role is available. |
| 137 | * |
| 138 | * @param roleName the name of the role to get the holders for |
| 139 | * |
| 140 | * @return whether the role is available |
| 141 | */ |
| 142 | @GuardedBy("RoleManagerService.mLock") |
| 143 | public boolean isRoleAvailableLocked(@NonNull String roleName) { |
| 144 | throwIfDestroyedLocked(); |
| 145 | return mRoles.containsKey(roleName); |
| 146 | } |
| 147 | |
| 148 | /** |
| 149 | * Get the holders of a role. |
| 150 | * |
| 151 | * @param roleName the name of the role to query for |
| 152 | * |
| 153 | * @return the set of role holders. {@code null} should not be returned and indicates an issue. |
| 154 | */ |
| 155 | @GuardedBy("RoleManagerService.mLock") |
| 156 | @Nullable |
| 157 | public ArraySet<String> getRoleHoldersLocked(@NonNull String roleName) { |
| 158 | throwIfDestroyedLocked(); |
| 159 | return mRoles.get(roleName); |
| 160 | } |
| 161 | |
| 162 | /** |
Hai Zhang | 8e60a8f | 2018-11-20 11:21:09 -0800 | [diff] [blame] | 163 | * Set the names of all available roles. |
| 164 | * |
| 165 | * @param roleNames the names of all the available roles |
| 166 | */ |
| 167 | @GuardedBy("RoleManagerService.mLock") |
| 168 | public void setRoleNamesLocked(@NonNull List<String> roleNames) { |
| 169 | throwIfDestroyedLocked(); |
| 170 | boolean changed = false; |
| 171 | for (int i = mRoles.size() - 1; i >= 0; i--) { |
| 172 | String roleName = mRoles.keyAt(i); |
| 173 | if (!roleNames.contains(roleName)) { |
| 174 | ArraySet<String> packageNames = mRoles.valueAt(i); |
| 175 | if (!packageNames.isEmpty()) { |
| 176 | Slog.e(LOG_TAG, "Holders of a removed role should have been cleaned up, role: " |
| 177 | + roleName + ", holders: " + packageNames); |
| 178 | } |
| 179 | mRoles.removeAt(i); |
| 180 | changed = true; |
| 181 | } |
| 182 | } |
| 183 | int roleNamesSize = roleNames.size(); |
| 184 | for (int i = 0; i < roleNamesSize; i++) { |
| 185 | String roleName = roleNames.get(i); |
| 186 | if (!mRoles.containsKey(roleName)) { |
| 187 | mRoles.put(roleName, new ArraySet<>()); |
| 188 | Slog.i(LOG_TAG, "Added new role: " + roleName); |
| 189 | changed = true; |
| 190 | } |
| 191 | } |
| 192 | if (changed) { |
| 193 | writeAsyncLocked(); |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | /** |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 198 | * Add a holder to a role. |
| 199 | * |
| 200 | * @param roleName the name of the role to add the holder to |
| 201 | * @param packageName the package name of the new holder |
| 202 | * |
| 203 | * @return {@code false} only if the set of role holders is null, which should not happen and |
| 204 | * indicates an issue. |
| 205 | */ |
| 206 | @CheckResult |
| 207 | @GuardedBy("RoleManagerService.mLock") |
| 208 | public boolean addRoleHolderLocked(@NonNull String roleName, @NonNull String packageName) { |
| 209 | throwIfDestroyedLocked(); |
| 210 | ArraySet<String> roleHolders = mRoles.get(roleName); |
| 211 | if (roleHolders == null) { |
Hai Zhang | b295ac4 | 2018-11-16 16:08:18 -0800 | [diff] [blame] | 212 | Slog.e(LOG_TAG, "Cannot add role holder for unknown role, role: " + roleName |
| 213 | + ", package: " + packageName); |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 214 | return false; |
| 215 | } |
Hai Zhang | 8e60a8f | 2018-11-20 11:21:09 -0800 | [diff] [blame] | 216 | boolean changed = roleHolders.add(packageName); |
| 217 | if (changed) { |
| 218 | writeAsyncLocked(); |
| 219 | } |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 220 | return true; |
| 221 | } |
| 222 | |
| 223 | /** |
| 224 | * Remove a holder from a role. |
| 225 | * |
| 226 | * @param roleName the name of the role to remove the holder from |
| 227 | * @param packageName the package name of the holder to remove |
| 228 | * |
| 229 | * @return {@code false} only if the set of role holders is null, which should not happen and |
| 230 | * indicates an issue. |
| 231 | */ |
| 232 | @CheckResult |
| 233 | @GuardedBy("RoleManagerService.mLock") |
| 234 | public boolean removeRoleHolderLocked(@NonNull String roleName, @NonNull String packageName) { |
| 235 | throwIfDestroyedLocked(); |
| 236 | ArraySet<String> roleHolders = mRoles.get(roleName); |
| 237 | if (roleHolders == null) { |
Hai Zhang | b295ac4 | 2018-11-16 16:08:18 -0800 | [diff] [blame] | 238 | Slog.e(LOG_TAG, "Cannot remove role holder for unknown role, role: " + roleName |
| 239 | + ", package: " + packageName); |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 240 | return false; |
| 241 | } |
Hai Zhang | 8e60a8f | 2018-11-20 11:21:09 -0800 | [diff] [blame] | 242 | boolean changed = roleHolders.remove(packageName); |
| 243 | if (changed) { |
| 244 | writeAsyncLocked(); |
| 245 | } |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 246 | return true; |
| 247 | } |
| 248 | |
| 249 | /** |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 250 | * Schedule writing the state to file. |
| 251 | */ |
| 252 | @GuardedBy("RoleManagerService.mLock") |
Eugene Susla | abdefba | 2018-11-09 18:06:43 -0800 | [diff] [blame^] | 253 | void writeAsyncLocked() { |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 254 | throwIfDestroyedLocked(); |
| 255 | int version = mVersion; |
| 256 | ArrayMap<String, ArraySet<String>> roles = new ArrayMap<>(); |
Eugene Susla | abdefba | 2018-11-09 18:06:43 -0800 | [diff] [blame^] | 257 | for (int i = 0, size = CollectionUtils.size(mRoles); i < size; ++i) { |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 258 | String roleName = mRoles.keyAt(i); |
| 259 | ArraySet<String> roleHolders = mRoles.valueAt(i); |
| 260 | roleHolders = new ArraySet<>(roleHolders); |
| 261 | roles.put(roleName, roleHolders); |
| 262 | } |
| 263 | mWriteHandler.removeCallbacksAndMessages(null); |
Hai Zhang | 8e60a8f | 2018-11-20 11:21:09 -0800 | [diff] [blame] | 264 | // TODO: Throttle writes. |
Eugene Susla | 6d492272 | 2018-11-08 16:25:28 -0800 | [diff] [blame] | 265 | mWriteHandler.sendMessage(PooledLambda.obtainMessage( |
Eugene Susla | abdefba | 2018-11-09 18:06:43 -0800 | [diff] [blame^] | 266 | RoleUserState::writeSync, this, version, roles, mLastGrantPackagesHash)); |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 267 | } |
| 268 | |
| 269 | @WorkerThread |
Eugene Susla | abdefba | 2018-11-09 18:06:43 -0800 | [diff] [blame^] | 270 | private void writeSync(int version, @NonNull ArrayMap<String, ArraySet<String>> roles, |
| 271 | String packagesHash) { |
Hai Zhang | b295ac4 | 2018-11-16 16:08:18 -0800 | [diff] [blame] | 272 | AtomicFile atomicFile = new AtomicFile(getFile(mUserId), "roles-" + mUserId); |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 273 | FileOutputStream out = null; |
| 274 | try { |
Hai Zhang | b295ac4 | 2018-11-16 16:08:18 -0800 | [diff] [blame] | 275 | out = atomicFile.startWrite(); |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 276 | |
| 277 | XmlSerializer serializer = Xml.newSerializer(); |
| 278 | serializer.setOutput(out, StandardCharsets.UTF_8.name()); |
| 279 | serializer.setFeature( |
| 280 | "http://xmlpull.org/v1/doc/features.html#indent-output", true); |
| 281 | serializer.startDocument(null, true); |
| 282 | |
Eugene Susla | abdefba | 2018-11-09 18:06:43 -0800 | [diff] [blame^] | 283 | serializeRoles(serializer, version, roles, packagesHash); |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 284 | |
| 285 | serializer.endDocument(); |
Hai Zhang | b295ac4 | 2018-11-16 16:08:18 -0800 | [diff] [blame] | 286 | atomicFile.finishWrite(out); |
| 287 | } catch (IllegalArgumentException | IllegalStateException | IOException e) { |
| 288 | Slog.wtf(LOG_TAG, "Failed to write roles.xml, restoring backup", e); |
| 289 | if (out != null) { |
| 290 | atomicFile.failWrite(out); |
| 291 | } |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 292 | } finally { |
| 293 | IoUtils.closeQuietly(out); |
| 294 | } |
| 295 | } |
| 296 | |
| 297 | @WorkerThread |
| 298 | private void serializeRoles(@NonNull XmlSerializer serializer, int version, |
Eugene Susla | abdefba | 2018-11-09 18:06:43 -0800 | [diff] [blame^] | 299 | @NonNull ArrayMap<String, ArraySet<String>> roles, String packagesHash) |
| 300 | throws IOException { |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 301 | serializer.startTag(null, TAG_ROLES); |
| 302 | serializer.attribute(null, ATTRIBUTE_VERSION, Integer.toString(version)); |
Eugene Susla | abdefba | 2018-11-09 18:06:43 -0800 | [diff] [blame^] | 303 | serializer.attribute(null, ATTRIBUTE_PACKAGES_HASH, packagesHash); |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 304 | for (int i = 0, size = roles.size(); i < size; ++i) { |
| 305 | String roleName = roles.keyAt(i); |
| 306 | ArraySet<String> roleHolders = roles.valueAt(i); |
| 307 | serializer.startTag(null, TAG_ROLE); |
| 308 | serializer.attribute(null, ATTRIBUTE_NAME, roleName); |
| 309 | serializeRoleHolders(serializer, roleHolders); |
| 310 | serializer.endTag(null, TAG_ROLE); |
| 311 | } |
| 312 | serializer.endTag(null, TAG_ROLES); |
| 313 | } |
| 314 | |
| 315 | @WorkerThread |
| 316 | private void serializeRoleHolders(@NonNull XmlSerializer serializer, |
| 317 | @NonNull ArraySet<String> roleHolders) throws IOException { |
| 318 | for (int i = 0, size = roleHolders.size(); i < size; ++i) { |
| 319 | String roleHolder = roleHolders.valueAt(i); |
| 320 | serializer.startTag(null, TAG_HOLDER); |
| 321 | serializer.attribute(null, ATTRIBUTE_NAME, roleHolder); |
| 322 | serializer.endTag(null, TAG_HOLDER); |
| 323 | } |
| 324 | } |
| 325 | |
| 326 | /** |
| 327 | * Read the state from file. |
| 328 | */ |
| 329 | @GuardedBy("RoleManagerService.mLock") |
| 330 | public void readSyncLocked() { |
| 331 | if (mRoles != null) { |
Hai Zhang | b295ac4 | 2018-11-16 16:08:18 -0800 | [diff] [blame] | 332 | throw new IllegalStateException("This RoleUserState has already read the roles.xml"); |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 333 | } |
| 334 | |
Hai Zhang | b295ac4 | 2018-11-16 16:08:18 -0800 | [diff] [blame] | 335 | File file = getFile(mUserId); |
| 336 | try (FileInputStream in = new AtomicFile(file).openRead()) { |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 337 | XmlPullParser parser = Xml.newPullParser(); |
| 338 | parser.setInput(in, null); |
| 339 | parseXmlLocked(parser); |
Hai Zhang | b295ac4 | 2018-11-16 16:08:18 -0800 | [diff] [blame] | 340 | } catch (FileNotFoundException e) { |
| 341 | Slog.i(LOG_TAG, "roles.xml not found"); |
| 342 | mRoles = new ArrayMap<>(); |
| 343 | mVersion = VERSION_UNDEFINED; |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 344 | } catch (XmlPullParserException | IOException e) { |
Hai Zhang | b295ac4 | 2018-11-16 16:08:18 -0800 | [diff] [blame] | 345 | throw new IllegalStateException("Failed to parse roles.xml: " + file, e); |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 346 | } |
| 347 | } |
| 348 | |
| 349 | private void parseXmlLocked(@NonNull XmlPullParser parser) throws IOException, |
| 350 | XmlPullParserException { |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 351 | int type; |
Hai Zhang | b295ac4 | 2018-11-16 16:08:18 -0800 | [diff] [blame] | 352 | int depth; |
| 353 | int innerDepth = parser.getDepth() + 1; |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 354 | while ((type = parser.next()) != XmlPullParser.END_DOCUMENT |
Hai Zhang | b295ac4 | 2018-11-16 16:08:18 -0800 | [diff] [blame] | 355 | && ((depth = parser.getDepth()) >= innerDepth || type != XmlPullParser.END_TAG)) { |
| 356 | if (depth > innerDepth || type != XmlPullParser.START_TAG) { |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 357 | continue; |
| 358 | } |
Hai Zhang | b295ac4 | 2018-11-16 16:08:18 -0800 | [diff] [blame] | 359 | |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 360 | if (parser.getName().equals(TAG_ROLES)) { |
| 361 | parseRolesLocked(parser); |
| 362 | return; |
| 363 | } |
| 364 | } |
| 365 | } |
| 366 | |
| 367 | private void parseRolesLocked(@NonNull XmlPullParser parser) throws IOException, |
| 368 | XmlPullParserException { |
| 369 | mVersion = Integer.parseInt(parser.getAttributeValue(null, ATTRIBUTE_VERSION)); |
Eugene Susla | abdefba | 2018-11-09 18:06:43 -0800 | [diff] [blame^] | 370 | mLastGrantPackagesHash = parser.getAttributeValue(null, ATTRIBUTE_PACKAGES_HASH); |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 371 | mRoles = new ArrayMap<>(); |
Hai Zhang | b295ac4 | 2018-11-16 16:08:18 -0800 | [diff] [blame] | 372 | |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 373 | int type; |
Hai Zhang | b295ac4 | 2018-11-16 16:08:18 -0800 | [diff] [blame] | 374 | int depth; |
| 375 | int innerDepth = parser.getDepth() + 1; |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 376 | while ((type = parser.next()) != XmlPullParser.END_DOCUMENT |
Hai Zhang | b295ac4 | 2018-11-16 16:08:18 -0800 | [diff] [blame] | 377 | && ((depth = parser.getDepth()) >= innerDepth || type != XmlPullParser.END_TAG)) { |
| 378 | if (depth > innerDepth || type != XmlPullParser.START_TAG) { |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 379 | continue; |
| 380 | } |
Hai Zhang | b295ac4 | 2018-11-16 16:08:18 -0800 | [diff] [blame] | 381 | |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 382 | if (parser.getName().equals(TAG_ROLE)) { |
| 383 | String roleName = parser.getAttributeValue(null, ATTRIBUTE_NAME); |
| 384 | ArraySet<String> roleHolders = parseRoleHoldersLocked(parser); |
| 385 | mRoles.put(roleName, roleHolders); |
| 386 | } |
| 387 | } |
| 388 | } |
| 389 | |
| 390 | @NonNull |
| 391 | private ArraySet<String> parseRoleHoldersLocked(@NonNull XmlPullParser parser) |
| 392 | throws IOException, XmlPullParserException { |
| 393 | ArraySet<String> roleHolders = new ArraySet<>(); |
Hai Zhang | b295ac4 | 2018-11-16 16:08:18 -0800 | [diff] [blame] | 394 | |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 395 | int type; |
Hai Zhang | b295ac4 | 2018-11-16 16:08:18 -0800 | [diff] [blame] | 396 | int depth; |
| 397 | int innerDepth = parser.getDepth() + 1; |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 398 | while ((type = parser.next()) != XmlPullParser.END_DOCUMENT |
Hai Zhang | b295ac4 | 2018-11-16 16:08:18 -0800 | [diff] [blame] | 399 | && ((depth = parser.getDepth()) >= innerDepth || type != XmlPullParser.END_TAG)) { |
| 400 | if (depth > innerDepth || type != XmlPullParser.START_TAG) { |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 401 | continue; |
| 402 | } |
Hai Zhang | b295ac4 | 2018-11-16 16:08:18 -0800 | [diff] [blame] | 403 | |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 404 | if (parser.getName().equals(TAG_HOLDER)) { |
| 405 | String roleHolder = parser.getAttributeValue(null, ATTRIBUTE_NAME); |
| 406 | roleHolders.add(roleHolder); |
| 407 | } |
| 408 | } |
Hai Zhang | b295ac4 | 2018-11-16 16:08:18 -0800 | [diff] [blame] | 409 | |
Hai Zhang | b777668 | 2018-09-25 15:10:57 -0700 | [diff] [blame] | 410 | return roleHolders; |
| 411 | } |
| 412 | |
| 413 | /** |
| 414 | * Destroy this state and delete the corresponding file. Any pending writes to the file will be |
| 415 | * cancelled and any future interaction with this state will throw an exception. |
| 416 | */ |
| 417 | @GuardedBy("RoleManagerService.mLock") |
| 418 | public void destroySyncLocked() { |
| 419 | throwIfDestroyedLocked(); |
| 420 | mWriteHandler.removeCallbacksAndMessages(null); |
| 421 | getFile(mUserId).delete(); |
| 422 | mDestroyed = true; |
| 423 | } |
| 424 | |
| 425 | @GuardedBy("RoleManagerService.mLock") |
| 426 | private void throwIfDestroyedLocked() { |
| 427 | if (mDestroyed) { |
| 428 | throw new IllegalStateException("This RoleUserState has already been destroyed"); |
| 429 | } |
| 430 | } |
| 431 | |
| 432 | private static @NonNull File getFile(@UserIdInt int userId) { |
| 433 | return new File(Environment.getUserSystemDirectory(userId), ROLES_FILE_NAME); |
| 434 | } |
| 435 | } |