| /* |
| * 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.os.Binder; |
| import android.os.IBinder; |
| import android.util.ArraySet; |
| |
| import com.google.android.collect.Sets; |
| |
| import java.io.PrintWriter; |
| import java.util.Iterator; |
| |
| final class UriPermissionOwner { |
| final ActivityManagerService service; |
| final Object owner; |
| |
| Binder externalToken; |
| |
| private ArraySet<UriPermission> mReadPerms; |
| private ArraySet<UriPermission> mWritePerms; |
| |
| class ExternalToken extends Binder { |
| UriPermissionOwner getOwner() { |
| return UriPermissionOwner.this; |
| } |
| } |
| |
| UriPermissionOwner(ActivityManagerService service, Object owner) { |
| this.service = service; |
| this.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) { |
| removeUriPermissionLocked(null, mode); |
| } |
| |
| void removeUriPermissionLocked(ActivityManagerService.GrantUri grantUri, int mode) { |
| if ((mode & Intent.FLAG_GRANT_READ_URI_PERMISSION) != 0 |
| && mReadPerms != null) { |
| Iterator<UriPermission> it = mReadPerms.iterator(); |
| while (it.hasNext()) { |
| UriPermission perm = it.next(); |
| if (grantUri == null || grantUri.equals(perm.uri)) { |
| perm.removeReadOwner(this); |
| service.removeUriPermissionIfNeededLocked(perm); |
| it.remove(); |
| } |
| } |
| if (mReadPerms.isEmpty()) { |
| mReadPerms = null; |
| } |
| } |
| if ((mode & Intent.FLAG_GRANT_WRITE_URI_PERMISSION) != 0 |
| && mWritePerms != null) { |
| Iterator<UriPermission> it = mWritePerms.iterator(); |
| while (it.hasNext()) { |
| UriPermission perm = it.next(); |
| if (grantUri == null || grantUri.equals(perm.uri)) { |
| perm.removeWriteOwner(this); |
| service.removeUriPermissionIfNeededLocked(perm); |
| it.remove(); |
| } |
| } |
| if (mWritePerms.isEmpty()) { |
| mWritePerms = null; |
| } |
| } |
| } |
| |
| public void addReadPermission(UriPermission perm) { |
| if (mReadPerms == null) { |
| mReadPerms = Sets.newArraySet(); |
| } |
| mReadPerms.add(perm); |
| } |
| |
| public void addWritePermission(UriPermission perm) { |
| if (mWritePerms == null) { |
| mWritePerms = Sets.newArraySet(); |
| } |
| mWritePerms.add(perm); |
| } |
| |
| public void removeReadPermission(UriPermission perm) { |
| mReadPerms.remove(perm); |
| if (mReadPerms.isEmpty()) { |
| mReadPerms = null; |
| } |
| } |
| |
| public void removeWritePermission(UriPermission perm) { |
| mWritePerms.remove(perm); |
| if (mWritePerms.isEmpty()) { |
| mWritePerms = null; |
| } |
| } |
| |
| public void dump(PrintWriter pw, String prefix) { |
| if (mReadPerms != null) { |
| pw.print(prefix); pw.print("readUriPermissions="); pw.println(mReadPerms); |
| } |
| if (mWritePerms != null) { |
| pw.print(prefix); pw.print("writeUriPermissions="); pw.println(mWritePerms); |
| } |
| } |
| |
| @Override |
| public String toString() { |
| return owner.toString(); |
| } |
| } |