| /* |
| * Copyright (C) 2006 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.database; |
| |
| import android.os.Binder; |
| import android.os.Bundle; |
| import android.os.IBinder; |
| import android.os.Parcel; |
| import android.os.Parcelable; |
| import android.os.RemoteException; |
| |
| /** |
| * Native implementation of the bulk cursor. This is only for use in implementing |
| * IPC, application code should use the Cursor interface. |
| * |
| * {@hide} |
| */ |
| public abstract class BulkCursorNative extends Binder implements IBulkCursor |
| { |
| public BulkCursorNative() |
| { |
| attachInterface(this, descriptor); |
| } |
| |
| /** |
| * Cast a Binder object into a content resolver interface, generating |
| * a proxy if needed. |
| */ |
| static public IBulkCursor asInterface(IBinder obj) |
| { |
| if (obj == null) { |
| return null; |
| } |
| IBulkCursor in = (IBulkCursor)obj.queryLocalInterface(descriptor); |
| if (in != null) { |
| return in; |
| } |
| |
| return new BulkCursorProxy(obj); |
| } |
| |
| @Override |
| public boolean onTransact(int code, Parcel data, Parcel reply, int flags) |
| throws RemoteException { |
| try { |
| switch (code) { |
| case GET_CURSOR_WINDOW_TRANSACTION: { |
| data.enforceInterface(IBulkCursor.descriptor); |
| int startPos = data.readInt(); |
| CursorWindow window = getWindow(startPos); |
| reply.writeNoException(); |
| if (window == null) { |
| reply.writeInt(0); |
| } else { |
| reply.writeInt(1); |
| window.writeToParcel(reply, Parcelable.PARCELABLE_WRITE_RETURN_VALUE); |
| } |
| return true; |
| } |
| |
| case DEACTIVATE_TRANSACTION: { |
| data.enforceInterface(IBulkCursor.descriptor); |
| deactivate(); |
| reply.writeNoException(); |
| return true; |
| } |
| |
| case CLOSE_TRANSACTION: { |
| data.enforceInterface(IBulkCursor.descriptor); |
| close(); |
| reply.writeNoException(); |
| return true; |
| } |
| |
| case REQUERY_TRANSACTION: { |
| data.enforceInterface(IBulkCursor.descriptor); |
| IContentObserver observer = |
| IContentObserver.Stub.asInterface(data.readStrongBinder()); |
| int count = requery(observer); |
| reply.writeNoException(); |
| reply.writeInt(count); |
| reply.writeBundle(getExtras()); |
| return true; |
| } |
| |
| case ON_MOVE_TRANSACTION: { |
| data.enforceInterface(IBulkCursor.descriptor); |
| int position = data.readInt(); |
| onMove(position); |
| reply.writeNoException(); |
| return true; |
| } |
| |
| case GET_EXTRAS_TRANSACTION: { |
| data.enforceInterface(IBulkCursor.descriptor); |
| Bundle extras = getExtras(); |
| reply.writeNoException(); |
| reply.writeBundle(extras); |
| return true; |
| } |
| |
| case RESPOND_TRANSACTION: { |
| data.enforceInterface(IBulkCursor.descriptor); |
| Bundle extras = data.readBundle(); |
| Bundle returnExtras = respond(extras); |
| reply.writeNoException(); |
| reply.writeBundle(returnExtras); |
| return true; |
| } |
| } |
| } catch (Exception e) { |
| DatabaseUtils.writeExceptionToParcel(reply, e); |
| return true; |
| } |
| |
| return super.onTransact(code, data, reply, flags); |
| } |
| |
| public IBinder asBinder() |
| { |
| return this; |
| } |
| } |
| |
| |
| final class BulkCursorProxy implements IBulkCursor { |
| private IBinder mRemote; |
| private Bundle mExtras; |
| |
| public BulkCursorProxy(IBinder remote) |
| { |
| mRemote = remote; |
| mExtras = null; |
| } |
| |
| public IBinder asBinder() |
| { |
| return mRemote; |
| } |
| |
| public CursorWindow getWindow(int position) throws RemoteException |
| { |
| Parcel data = Parcel.obtain(); |
| Parcel reply = Parcel.obtain(); |
| try { |
| data.writeInterfaceToken(IBulkCursor.descriptor); |
| data.writeInt(position); |
| |
| mRemote.transact(GET_CURSOR_WINDOW_TRANSACTION, data, reply, 0); |
| DatabaseUtils.readExceptionFromParcel(reply); |
| |
| CursorWindow window = null; |
| if (reply.readInt() == 1) { |
| window = CursorWindow.newFromParcel(reply); |
| } |
| return window; |
| } finally { |
| data.recycle(); |
| reply.recycle(); |
| } |
| } |
| |
| public void onMove(int position) throws RemoteException { |
| Parcel data = Parcel.obtain(); |
| Parcel reply = Parcel.obtain(); |
| try { |
| data.writeInterfaceToken(IBulkCursor.descriptor); |
| data.writeInt(position); |
| |
| mRemote.transact(ON_MOVE_TRANSACTION, data, reply, 0); |
| DatabaseUtils.readExceptionFromParcel(reply); |
| } finally { |
| data.recycle(); |
| reply.recycle(); |
| } |
| } |
| |
| public void deactivate() throws RemoteException |
| { |
| Parcel data = Parcel.obtain(); |
| Parcel reply = Parcel.obtain(); |
| try { |
| data.writeInterfaceToken(IBulkCursor.descriptor); |
| |
| mRemote.transact(DEACTIVATE_TRANSACTION, data, reply, 0); |
| DatabaseUtils.readExceptionFromParcel(reply); |
| } finally { |
| data.recycle(); |
| reply.recycle(); |
| } |
| } |
| |
| public void close() throws RemoteException |
| { |
| Parcel data = Parcel.obtain(); |
| Parcel reply = Parcel.obtain(); |
| try { |
| data.writeInterfaceToken(IBulkCursor.descriptor); |
| |
| mRemote.transact(CLOSE_TRANSACTION, data, reply, 0); |
| DatabaseUtils.readExceptionFromParcel(reply); |
| } finally { |
| data.recycle(); |
| reply.recycle(); |
| } |
| } |
| |
| public int requery(IContentObserver observer) throws RemoteException { |
| Parcel data = Parcel.obtain(); |
| Parcel reply = Parcel.obtain(); |
| try { |
| data.writeInterfaceToken(IBulkCursor.descriptor); |
| data.writeStrongInterface(observer); |
| |
| boolean result = mRemote.transact(REQUERY_TRANSACTION, data, reply, 0); |
| DatabaseUtils.readExceptionFromParcel(reply); |
| |
| int count; |
| if (!result) { |
| count = -1; |
| } else { |
| count = reply.readInt(); |
| mExtras = reply.readBundle(); |
| } |
| return count; |
| } finally { |
| data.recycle(); |
| reply.recycle(); |
| } |
| } |
| |
| public Bundle getExtras() throws RemoteException { |
| if (mExtras == null) { |
| Parcel data = Parcel.obtain(); |
| Parcel reply = Parcel.obtain(); |
| try { |
| data.writeInterfaceToken(IBulkCursor.descriptor); |
| |
| mRemote.transact(GET_EXTRAS_TRANSACTION, data, reply, 0); |
| DatabaseUtils.readExceptionFromParcel(reply); |
| |
| mExtras = reply.readBundle(); |
| } finally { |
| data.recycle(); |
| reply.recycle(); |
| } |
| } |
| return mExtras; |
| } |
| |
| public Bundle respond(Bundle extras) throws RemoteException { |
| Parcel data = Parcel.obtain(); |
| Parcel reply = Parcel.obtain(); |
| try { |
| data.writeInterfaceToken(IBulkCursor.descriptor); |
| data.writeBundle(extras); |
| |
| mRemote.transact(RESPOND_TRANSACTION, data, reply, 0); |
| DatabaseUtils.readExceptionFromParcel(reply); |
| |
| Bundle returnExtras = reply.readBundle(); |
| return returnExtras; |
| } finally { |
| data.recycle(); |
| reply.recycle(); |
| } |
| } |
| } |
| |