| /* |
| * Copyright (C) 2017 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 com.android.server.companion; |
| |
| import static com.android.internal.util.CollectionUtils.size; |
| import static com.android.internal.util.Preconditions.checkArgument; |
| import static com.android.internal.util.Preconditions.checkNotNull; |
| import static com.android.internal.util.Preconditions.checkState; |
| |
| import android.Manifest; |
| import android.annotation.CheckResult; |
| import android.annotation.Nullable; |
| import android.app.PendingIntent; |
| import android.companion.AssociationRequest; |
| import android.companion.CompanionDeviceManager; |
| import android.companion.ICompanionDeviceDiscoveryService; |
| import android.companion.ICompanionDeviceDiscoveryServiceCallback; |
| import android.companion.ICompanionDeviceManager; |
| import android.companion.IFindDeviceCallback; |
| import android.content.ComponentName; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.ServiceConnection; |
| import android.content.pm.FeatureInfo; |
| import android.content.pm.PackageInfo; |
| import android.content.pm.PackageManager; |
| import android.net.NetworkPolicyManager; |
| import android.os.Binder; |
| import android.os.Environment; |
| import android.os.Handler; |
| import android.os.IBinder; |
| import android.os.IDeviceIdleController; |
| import android.os.IInterface; |
| import android.os.Parcel; |
| import android.os.Process; |
| import android.os.RemoteException; |
| import android.os.ResultReceiver; |
| import android.os.ServiceManager; |
| import android.os.ShellCallback; |
| import android.os.ShellCommand; |
| import android.os.UserHandle; |
| import android.provider.Settings; |
| import android.provider.SettingsStringUtil.ComponentNameSet; |
| import android.text.BidiFormatter; |
| import android.util.AtomicFile; |
| import android.util.ExceptionUtils; |
| import android.util.Log; |
| import android.util.Slog; |
| import android.util.Xml; |
| |
| import com.android.internal.app.IAppOpsService; |
| import com.android.internal.content.PackageMonitor; |
| import com.android.internal.notification.NotificationAccessConfirmationActivityContract; |
| import com.android.internal.util.ArrayUtils; |
| import com.android.internal.util.CollectionUtils; |
| import com.android.server.FgThread; |
| import com.android.server.SystemService; |
| |
| import org.xmlpull.v1.XmlPullParser; |
| import org.xmlpull.v1.XmlPullParserException; |
| import org.xmlpull.v1.XmlSerializer; |
| |
| import java.io.File; |
| import java.io.FileDescriptor; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.nio.charset.StandardCharsets; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Objects; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| import java.util.function.Function; |
| |
| //TODO onStop schedule unbind in 5 seconds |
| //TODO make sure APIs are only callable from currently focused app |
| //TODO schedule stopScan on activity destroy(except if configuration change) |
| //TODO on associate called again after configuration change -> replace old callback with new |
| //TODO avoid leaking calling activity in IFindDeviceCallback (see PrintManager#print for example) |
| /** @hide */ |
| public class CompanionDeviceManagerService extends SystemService implements Binder.DeathRecipient { |
| |
| private static final ComponentName SERVICE_TO_BIND_TO = ComponentName.createRelative( |
| CompanionDeviceManager.COMPANION_DEVICE_DISCOVERY_PACKAGE_NAME, |
| ".DeviceDiscoveryService"); |
| |
| private static final boolean DEBUG = false; |
| private static final String LOG_TAG = "CompanionDeviceManagerService"; |
| |
| private static final String XML_TAG_ASSOCIATIONS = "associations"; |
| private static final String XML_TAG_ASSOCIATION = "association"; |
| private static final String XML_ATTR_PACKAGE = "package"; |
| private static final String XML_ATTR_DEVICE = "device"; |
| private static final String XML_FILE_NAME = "companion_device_manager_associations.xml"; |
| |
| private final CompanionDeviceManagerImpl mImpl; |
| private final ConcurrentMap<Integer, AtomicFile> mUidToStorage = new ConcurrentHashMap<>(); |
| private IDeviceIdleController mIdleController; |
| private ServiceConnection mServiceConnection; |
| private IAppOpsService mAppOpsManager; |
| |
| private IFindDeviceCallback mFindDeviceCallback; |
| private AssociationRequest mRequest; |
| private String mCallingPackage; |
| |
| private final Object mLock = new Object(); |
| |
| public CompanionDeviceManagerService(Context context) { |
| super(context); |
| mImpl = new CompanionDeviceManagerImpl(); |
| mIdleController = IDeviceIdleController.Stub.asInterface( |
| ServiceManager.getService(Context.DEVICE_IDLE_CONTROLLER)); |
| mAppOpsManager = IAppOpsService.Stub.asInterface( |
| ServiceManager.getService(Context.APP_OPS_SERVICE)); |
| registerPackageMonitor(); |
| } |
| |
| private void registerPackageMonitor() { |
| new PackageMonitor() { |
| @Override |
| public void onPackageRemoved(String packageName, int uid) { |
| updateAssociations( |
| as -> CollectionUtils.filter(as, |
| a -> !Objects.equals(a.companionAppPackage, packageName)), |
| getChangingUserId()); |
| } |
| |
| @Override |
| public void onPackageModified(String packageName) { |
| int userId = getChangingUserId(); |
| if (!ArrayUtils.isEmpty(readAllAssociations(userId, packageName))) { |
| updateSpecialAccessPermissionForAssociatedPackage(packageName, userId); |
| } |
| } |
| |
| }.register(getContext(), FgThread.get().getLooper(), UserHandle.ALL, true); |
| } |
| |
| @Override |
| public void onStart() { |
| publishBinderService(Context.COMPANION_DEVICE_SERVICE, mImpl); |
| } |
| |
| @Override |
| public void binderDied() { |
| Handler.getMain().post(this::cleanup); |
| } |
| |
| private void cleanup() { |
| synchronized (mLock) { |
| mServiceConnection = unbind(mServiceConnection); |
| mFindDeviceCallback = unlinkToDeath(mFindDeviceCallback, this, 0); |
| mRequest = null; |
| mCallingPackage = null; |
| } |
| } |
| |
| /** |
| * Usage: {@code a = unlinkToDeath(a, deathRecipient, flags); } |
| */ |
| @Nullable |
| @CheckResult |
| private static <T extends IInterface> T unlinkToDeath(T iinterface, |
| IBinder.DeathRecipient deathRecipient, int flags) { |
| if (iinterface != null) { |
| iinterface.asBinder().unlinkToDeath(deathRecipient, flags); |
| } |
| return null; |
| } |
| |
| @Nullable |
| @CheckResult |
| private ServiceConnection unbind(@Nullable ServiceConnection conn) { |
| if (conn != null) { |
| getContext().unbindService(conn); |
| } |
| return null; |
| } |
| |
| class CompanionDeviceManagerImpl extends ICompanionDeviceManager.Stub { |
| |
| @Override |
| public boolean onTransact(int code, Parcel data, Parcel reply, int flags) |
| throws RemoteException { |
| try { |
| return super.onTransact(code, data, reply, flags); |
| } catch (Throwable e) { |
| Slog.e(LOG_TAG, "Error during IPC", e); |
| throw ExceptionUtils.propagate(e, RemoteException.class); |
| } |
| } |
| |
| @Override |
| public void associate( |
| AssociationRequest request, |
| IFindDeviceCallback callback, |
| String callingPackage) throws RemoteException { |
| if (DEBUG) { |
| Slog.i(LOG_TAG, "associate(request = " + request + ", callback = " + callback |
| + ", callingPackage = " + callingPackage + ")"); |
| } |
| checkNotNull(request, "Request cannot be null"); |
| checkNotNull(callback, "Callback cannot be null"); |
| checkCallerIsSystemOr(callingPackage); |
| int userId = getCallingUserId(); |
| checkUsesFeature(callingPackage, userId); |
| final long callingIdentity = Binder.clearCallingIdentity(); |
| try { |
| getContext().bindServiceAsUser( |
| new Intent().setComponent(SERVICE_TO_BIND_TO), |
| createServiceConnection(request, callback, callingPackage), |
| Context.BIND_AUTO_CREATE, |
| UserHandle.of(userId)); |
| } finally { |
| Binder.restoreCallingIdentity(callingIdentity); |
| } |
| } |
| |
| @Override |
| public void stopScan(AssociationRequest request, |
| IFindDeviceCallback callback, |
| String callingPackage) { |
| if (Objects.equals(request, mRequest) |
| && Objects.equals(callback, mFindDeviceCallback) |
| && Objects.equals(callingPackage, mCallingPackage)) { |
| cleanup(); |
| } |
| } |
| |
| @Override |
| public List<String> getAssociations(String callingPackage, int userId) |
| throws RemoteException { |
| checkCallerIsSystemOr(callingPackage, userId); |
| checkUsesFeature(callingPackage, getCallingUserId()); |
| return CollectionUtils.map( |
| readAllAssociations(userId, callingPackage), |
| a -> a.deviceAddress); |
| } |
| |
| //TODO also revoke notification access |
| @Override |
| public void disassociate(String deviceMacAddress, String callingPackage) |
| throws RemoteException { |
| checkNotNull(deviceMacAddress); |
| checkCallerIsSystemOr(callingPackage); |
| checkUsesFeature(callingPackage, getCallingUserId()); |
| removeAssociation(getCallingUserId(), callingPackage, deviceMacAddress); |
| } |
| |
| private void checkCallerIsSystemOr(String pkg) throws RemoteException { |
| checkCallerIsSystemOr(pkg, getCallingUserId()); |
| } |
| |
| private void checkCallerIsSystemOr(String pkg, int userId) throws RemoteException { |
| if (isCallerSystem()) { |
| return; |
| } |
| |
| checkArgument(getCallingUserId() == userId, |
| "Must be called by either same user or system"); |
| mAppOpsManager.checkPackage(Binder.getCallingUid(), pkg); |
| } |
| |
| @Override |
| public PendingIntent requestNotificationAccess(ComponentName component) |
| throws RemoteException { |
| String callingPackage = component.getPackageName(); |
| checkCanCallNotificationApi(callingPackage); |
| int userId = getCallingUserId(); |
| String packageTitle = BidiFormatter.getInstance().unicodeWrap( |
| getPackageInfo(callingPackage, userId) |
| .applicationInfo |
| .loadSafeLabel(getContext().getPackageManager()) |
| .toString()); |
| long identity = Binder.clearCallingIdentity(); |
| try { |
| return PendingIntent.getActivity(getContext(), |
| 0 /* request code */, |
| NotificationAccessConfirmationActivityContract.launcherIntent( |
| userId, component, packageTitle), |
| PendingIntent.FLAG_IMMUTABLE | PendingIntent.FLAG_ONE_SHOT |
| | PendingIntent.FLAG_CANCEL_CURRENT); |
| } finally { |
| Binder.restoreCallingIdentity(identity); |
| } |
| } |
| |
| @Override |
| public boolean hasNotificationAccess(ComponentName component) throws RemoteException { |
| checkCanCallNotificationApi(component.getPackageName()); |
| String setting = Settings.Secure.getString(getContext().getContentResolver(), |
| Settings.Secure.ENABLED_NOTIFICATION_LISTENERS); |
| return new ComponentNameSet(setting).contains(component); |
| } |
| |
| private void checkCanCallNotificationApi(String callingPackage) throws RemoteException { |
| checkCallerIsSystemOr(callingPackage); |
| int userId = getCallingUserId(); |
| checkState(!ArrayUtils.isEmpty(readAllAssociations(userId, callingPackage)), |
| "App must have an association before calling this API"); |
| checkUsesFeature(callingPackage, userId); |
| } |
| |
| private void checkUsesFeature(String pkg, int userId) { |
| if (isCallerSystem()) { |
| // Drop the requirement for calls from system process |
| return; |
| } |
| |
| FeatureInfo[] reqFeatures = getPackageInfo(pkg, userId).reqFeatures; |
| String requiredFeature = PackageManager.FEATURE_COMPANION_DEVICE_SETUP; |
| int numFeatures = ArrayUtils.size(reqFeatures); |
| for (int i = 0; i < numFeatures; i++) { |
| if (requiredFeature.equals(reqFeatures[i].name)) return; |
| } |
| throw new IllegalStateException("Must declare uses-feature " |
| + requiredFeature |
| + " in manifest to use this API"); |
| } |
| |
| @Override |
| public void onShellCommand(FileDescriptor in, FileDescriptor out, FileDescriptor err, |
| String[] args, ShellCallback callback, ResultReceiver resultReceiver) |
| throws RemoteException { |
| new ShellCmd().exec(this, in, out, err, args, callback, resultReceiver); |
| } |
| } |
| |
| private static int getCallingUserId() { |
| return UserHandle.getUserId(Binder.getCallingUid()); |
| } |
| |
| private static boolean isCallerSystem() { |
| return Binder.getCallingUid() == Process.SYSTEM_UID; |
| } |
| |
| private ServiceConnection createServiceConnection( |
| final AssociationRequest request, |
| final IFindDeviceCallback findDeviceCallback, |
| final String callingPackage) { |
| mServiceConnection = new ServiceConnection() { |
| @Override |
| public void onServiceConnected(ComponentName name, IBinder service) { |
| if (DEBUG) { |
| Slog.i(LOG_TAG, |
| "onServiceConnected(name = " + name + ", service = " |
| + service + ")"); |
| } |
| |
| mFindDeviceCallback = findDeviceCallback; |
| mRequest = request; |
| mCallingPackage = callingPackage; |
| |
| try { |
| mFindDeviceCallback.asBinder().linkToDeath( |
| CompanionDeviceManagerService.this, 0); |
| } catch (RemoteException e) { |
| cleanup(); |
| return; |
| } |
| |
| try { |
| ICompanionDeviceDiscoveryService.Stub |
| .asInterface(service) |
| .startDiscovery( |
| request, |
| callingPackage, |
| findDeviceCallback, |
| getServiceCallback()); |
| } catch (RemoteException e) { |
| Log.e(LOG_TAG, "Error while initiating device discovery", e); |
| } |
| } |
| |
| @Override |
| public void onServiceDisconnected(ComponentName name) { |
| if (DEBUG) Slog.i(LOG_TAG, "onServiceDisconnected(name = " + name + ")"); |
| } |
| }; |
| return mServiceConnection; |
| } |
| |
| private ICompanionDeviceDiscoveryServiceCallback.Stub getServiceCallback() { |
| return new ICompanionDeviceDiscoveryServiceCallback.Stub() { |
| |
| @Override |
| public boolean onTransact(int code, Parcel data, Parcel reply, int flags) |
| throws RemoteException { |
| try { |
| return super.onTransact(code, data, reply, flags); |
| } catch (Throwable e) { |
| Slog.e(LOG_TAG, "Error during IPC", e); |
| throw ExceptionUtils.propagate(e, RemoteException.class); |
| } |
| } |
| |
| @Override |
| public void onDeviceSelected(String packageName, int userId, String deviceAddress) { |
| addAssociation(userId, packageName, deviceAddress); |
| cleanup(); |
| } |
| |
| @Override |
| public void onDeviceSelectionCancel() { |
| cleanup(); |
| } |
| }; |
| } |
| |
| void addAssociation(int userId, String packageName, String deviceAddress) { |
| updateSpecialAccessPermissionForAssociatedPackage(packageName, userId); |
| recordAssociation(packageName, deviceAddress); |
| } |
| |
| void removeAssociation(int userId, String pkg, String deviceMacAddress) { |
| updateAssociations(associations -> CollectionUtils.remove(associations, |
| new Association(userId, deviceMacAddress, pkg))); |
| } |
| |
| private void updateSpecialAccessPermissionForAssociatedPackage(String packageName, int userId) { |
| PackageInfo packageInfo = getPackageInfo(packageName, userId); |
| if (packageInfo == null) { |
| return; |
| } |
| |
| Binder.withCleanCallingIdentity(() -> { |
| try { |
| if (containsEither(packageInfo.requestedPermissions, |
| Manifest.permission.RUN_IN_BACKGROUND, |
| Manifest.permission.REQUEST_COMPANION_RUN_IN_BACKGROUND)) { |
| mIdleController.addPowerSaveWhitelistApp(packageInfo.packageName); |
| } else { |
| mIdleController.removePowerSaveWhitelistApp(packageInfo.packageName); |
| } |
| } catch (RemoteException e) { |
| /* ignore - local call */ |
| } |
| |
| NetworkPolicyManager networkPolicyManager = NetworkPolicyManager.from(getContext()); |
| if (containsEither(packageInfo.requestedPermissions, |
| Manifest.permission.USE_DATA_IN_BACKGROUND, |
| Manifest.permission.REQUEST_COMPANION_USE_DATA_IN_BACKGROUND)) { |
| networkPolicyManager.addUidPolicy( |
| packageInfo.applicationInfo.uid, |
| NetworkPolicyManager.POLICY_ALLOW_METERED_BACKGROUND); |
| } else { |
| networkPolicyManager.removeUidPolicy( |
| packageInfo.applicationInfo.uid, |
| NetworkPolicyManager.POLICY_ALLOW_METERED_BACKGROUND); |
| } |
| }); |
| } |
| |
| private static <T> boolean containsEither(T[] array, T a, T b) { |
| return ArrayUtils.contains(array, a) || ArrayUtils.contains(array, b); |
| } |
| |
| @Nullable |
| private PackageInfo getPackageInfo(String packageName, int userId) { |
| return Binder.withCleanCallingIdentity(() -> { |
| try { |
| return getContext().getPackageManager().getPackageInfoAsUser( |
| packageName, |
| PackageManager.GET_PERMISSIONS | PackageManager.GET_CONFIGURATIONS, |
| userId); |
| } catch (PackageManager.NameNotFoundException e) { |
| Slog.e(LOG_TAG, "Failed to get PackageInfo for package " + packageName, e); |
| return null; |
| } |
| }); |
| } |
| |
| private void recordAssociation(String priviledgedPackage, String deviceAddress) { |
| if (DEBUG) { |
| Log.i(LOG_TAG, "recordAssociation(priviledgedPackage = " + priviledgedPackage |
| + ", deviceAddress = " + deviceAddress + ")"); |
| } |
| int userId = getCallingUserId(); |
| updateAssociations(associations -> CollectionUtils.add(associations, |
| new Association(userId, deviceAddress, priviledgedPackage))); |
| } |
| |
| private void updateAssociations(Function<List<Association>, List<Association>> update) { |
| updateAssociations(update, getCallingUserId()); |
| } |
| |
| private void updateAssociations(Function<List<Association>, List<Association>> update, |
| int userId) { |
| final AtomicFile file = getStorageFileForUser(userId); |
| synchronized (file) { |
| List<Association> associations = readAllAssociations(userId); |
| final List<Association> old = CollectionUtils.copyOf(associations); |
| associations = update.apply(associations); |
| if (size(old) == size(associations)) return; |
| |
| List<Association> finalAssociations = associations; |
| file.write((out) -> { |
| XmlSerializer xml = Xml.newSerializer(); |
| try { |
| xml.setOutput(out, StandardCharsets.UTF_8.name()); |
| xml.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); |
| xml.startDocument(null, true); |
| xml.startTag(null, XML_TAG_ASSOCIATIONS); |
| |
| for (int i = 0; i < size(finalAssociations); i++) { |
| Association association = finalAssociations.get(i); |
| xml.startTag(null, XML_TAG_ASSOCIATION) |
| .attribute(null, XML_ATTR_PACKAGE, association.companionAppPackage) |
| .attribute(null, XML_ATTR_DEVICE, association.deviceAddress) |
| .endTag(null, XML_TAG_ASSOCIATION); |
| } |
| |
| xml.endTag(null, XML_TAG_ASSOCIATIONS); |
| xml.endDocument(); |
| } catch (Exception e) { |
| Slog.e(LOG_TAG, "Error while writing associations file", e); |
| throw ExceptionUtils.propagate(e); |
| } |
| |
| }); |
| } |
| } |
| |
| private AtomicFile getStorageFileForUser(int uid) { |
| return mUidToStorage.computeIfAbsent(uid, (u) -> |
| new AtomicFile(new File( |
| //TODO deprecated method - what's the right replacement? |
| Environment.getUserSystemDirectory(u), |
| XML_FILE_NAME))); |
| } |
| |
| @Nullable |
| private ArrayList<Association> readAllAssociations(int userId) { |
| return readAllAssociations(userId, null); |
| } |
| |
| @Nullable |
| private ArrayList<Association> readAllAssociations(int userId, @Nullable String packageFilter) { |
| final AtomicFile file = getStorageFileForUser(userId); |
| |
| if (!file.getBaseFile().exists()) return null; |
| |
| ArrayList<Association> result = null; |
| final XmlPullParser parser = Xml.newPullParser(); |
| synchronized (file) { |
| try (FileInputStream in = file.openRead()) { |
| parser.setInput(in, StandardCharsets.UTF_8.name()); |
| int type; |
| while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { |
| if (type != XmlPullParser.START_TAG |
| && !XML_TAG_ASSOCIATIONS.equals(parser.getName())) continue; |
| |
| final String appPackage = parser.getAttributeValue(null, XML_ATTR_PACKAGE); |
| final String deviceAddress = parser.getAttributeValue(null, XML_ATTR_DEVICE); |
| |
| if (appPackage == null || deviceAddress == null) continue; |
| if (packageFilter != null && !packageFilter.equals(appPackage)) continue; |
| |
| result = ArrayUtils.add(result, |
| new Association(userId, deviceAddress, appPackage)); |
| } |
| return result; |
| } catch (XmlPullParserException | IOException e) { |
| Slog.e(LOG_TAG, "Error while reading associations file", e); |
| return null; |
| } |
| } |
| } |
| |
| |
| |
| private class Association { |
| public final int uid; |
| public final String deviceAddress; |
| public final String companionAppPackage; |
| |
| private Association(int uid, String deviceAddress, String companionAppPackage) { |
| this.uid = uid; |
| this.deviceAddress = checkNotNull(deviceAddress); |
| this.companionAppPackage = checkNotNull(companionAppPackage); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) return true; |
| if (o == null || getClass() != o.getClass()) return false; |
| |
| Association that = (Association) o; |
| |
| if (uid != that.uid) return false; |
| if (!deviceAddress.equals(that.deviceAddress)) return false; |
| return companionAppPackage.equals(that.companionAppPackage); |
| |
| } |
| |
| @Override |
| public int hashCode() { |
| int result = uid; |
| result = 31 * result + deviceAddress.hashCode(); |
| result = 31 * result + companionAppPackage.hashCode(); |
| return result; |
| } |
| } |
| |
| private class ShellCmd extends ShellCommand { |
| public static final String USAGE = "help\n" |
| + "list USER_ID\n" |
| + "associate USER_ID PACKAGE MAC_ADDRESS\n" |
| + "disassociate USER_ID PACKAGE MAC_ADDRESS"; |
| |
| ShellCmd() { |
| getContext().enforceCallingOrSelfPermission( |
| android.Manifest.permission.MANAGE_COMPANION_DEVICES, "ShellCmd"); |
| } |
| |
| @Override |
| public int onCommand(String cmd) { |
| switch (cmd) { |
| case "list": { |
| ArrayList<Association> associations = readAllAssociations(getNextArgInt()); |
| for (int i = 0; i < size(associations); i++) { |
| Association a = associations.get(i); |
| getOutPrintWriter() |
| .println(a.companionAppPackage + " " + a.deviceAddress); |
| } |
| } break; |
| |
| case "associate": { |
| addAssociation(getNextArgInt(), getNextArgRequired(), getNextArgRequired()); |
| } break; |
| |
| case "disassociate": { |
| removeAssociation(getNextArgInt(), getNextArgRequired(), getNextArgRequired()); |
| } break; |
| |
| default: return handleDefaultCommands(cmd); |
| } |
| return 0; |
| } |
| |
| private int getNextArgInt() { |
| return Integer.parseInt(getNextArgRequired()); |
| } |
| |
| @Override |
| public void onHelp() { |
| getOutPrintWriter().println(USAGE); |
| } |
| } |
| |
| } |
