| /* |
| * Copyright (C) 2010 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.am; |
| |
| import android.content.Intent; |
| import android.net.Uri; |
| import android.os.Binder; |
| import android.os.IBinder; |
| |
| import java.util.HashSet; |
| import java.util.Iterator; |
| |
| final class UriPermissionOwner { |
| final ActivityManagerService service; |
| final Object owner; |
| |
| Binder externalToken; |
| |
| HashSet<UriPermission> readUriPermissions; // special access to reading uris. |
| HashSet<UriPermission> writeUriPermissions; // special access to writing uris. |
| |
| class ExternalToken extends Binder { |
| UriPermissionOwner getOwner() { |
| return UriPermissionOwner.this; |
| } |
| } |
| |
| UriPermissionOwner(ActivityManagerService _service, Object _owner) { |
| service = _service; |
| owner = _owner; |
| } |
| |
| Binder getExternalTokenLocked() { |
| if (externalToken == null) { |
| externalToken = new ExternalToken(); |
| } |
| return externalToken; |
| } |
| |
| static UriPermissionOwner fromExternalToken(IBinder token) { |
| if (token instanceof ExternalToken) { |
| return ((ExternalToken)token).getOwner(); |
| } |
| return null; |
| } |
| |
| void removeUriPermissionsLocked() { |
| removeUriPermissionsLocked(Intent.FLAG_GRANT_READ_URI_PERMISSION |
| | Intent.FLAG_GRANT_WRITE_URI_PERMISSION); |
| } |
| |
| void removeUriPermissionsLocked(int mode) { |
| if ((mode&Intent.FLAG_GRANT_READ_URI_PERMISSION) != 0 |
| && readUriPermissions != null) { |
| for (UriPermission perm : readUriPermissions) { |
| perm.removeReadOwner(this); |
| service.removeUriPermissionIfNeededLocked(perm); |
| } |
| readUriPermissions = null; |
| } |
| if ((mode&Intent.FLAG_GRANT_WRITE_URI_PERMISSION) != 0 |
| && writeUriPermissions != null) { |
| for (UriPermission perm : writeUriPermissions) { |
| perm.removeWriteOwner(this); |
| service.removeUriPermissionIfNeededLocked(perm); |
| } |
| writeUriPermissions = null; |
| } |
| } |
| |
| void removeUriPermissionLocked(Uri uri, int mode) { |
| if ((mode&Intent.FLAG_GRANT_READ_URI_PERMISSION) != 0 |
| && readUriPermissions != null) { |
| Iterator<UriPermission> it = readUriPermissions.iterator(); |
| while (it.hasNext()) { |
| UriPermission perm = it.next(); |
| if (uri.equals(perm.uri)) { |
| perm.removeReadOwner(this); |
| service.removeUriPermissionIfNeededLocked(perm); |
| it.remove(); |
| } |
| } |
| if (readUriPermissions.size() == 0) { |
| readUriPermissions = null; |
| } |
| } |
| if ((mode&Intent.FLAG_GRANT_WRITE_URI_PERMISSION) != 0 |
| && writeUriPermissions != null) { |
| Iterator<UriPermission> it = writeUriPermissions.iterator(); |
| while (it.hasNext()) { |
| UriPermission perm = it.next(); |
| if (uri.equals(perm.uri)) { |
| perm.removeWriteOwner(this); |
| service.removeUriPermissionIfNeededLocked(perm); |
| it.remove(); |
| } |
| } |
| if (writeUriPermissions.size() == 0) { |
| writeUriPermissions = null; |
| } |
| } |
| } |
| |
| public void addReadPermission(UriPermission perm) { |
| if (readUriPermissions == null) { |
| readUriPermissions = new HashSet<UriPermission>(); |
| } |
| readUriPermissions.add(perm); |
| } |
| |
| public void addWritePermission(UriPermission perm) { |
| if (writeUriPermissions == null) { |
| writeUriPermissions = new HashSet<UriPermission>(); |
| } |
| writeUriPermissions.add(perm); |
| } |
| |
| public void removeReadPermission(UriPermission perm) { |
| readUriPermissions.remove(perm); |
| if (readUriPermissions.size() == 0) { |
| readUriPermissions = null; |
| } |
| } |
| |
| public void removeWritePermission(UriPermission perm) { |
| writeUriPermissions.remove(perm); |
| if (writeUriPermissions.size() == 0) { |
| writeUriPermissions = null; |
| } |
| } |
| |
| @Override |
| public String toString() { |
| return owner.toString(); |
| } |
| } |