573 lines
19 KiB
Java
573 lines
19 KiB
Java
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/*
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* Copyright (C) 2006 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.content;
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import android.content.res.AssetFileDescriptor;
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import android.database.BulkCursorNative;
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import android.database.BulkCursorToCursorAdaptor;
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import android.database.Cursor;
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import android.database.CursorWindow;
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import android.database.DatabaseUtils;
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import android.database.IBulkCursor;
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import android.database.IContentObserver;
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import android.net.Uri;
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import android.os.Binder;
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import android.os.Bundle;
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import android.os.RemoteException;
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import android.os.IBinder;
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import android.os.Parcel;
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import android.os.ParcelFileDescriptor;
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import android.os.Parcelable;
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import java.io.FileNotFoundException;
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import java.util.ArrayList;
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/**
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* {@hide}
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*/
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abstract public class ContentProviderNative extends Binder implements IContentProvider {
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private static final String TAG = "ContentProvider";
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public ContentProviderNative()
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{
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attachInterface(this, descriptor);
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}
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/**
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* Cast a Binder object into a content resolver interface, generating
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* a proxy if needed.
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*/
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static public IContentProvider asInterface(IBinder obj)
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{
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if (obj == null) {
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return null;
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}
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IContentProvider in =
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(IContentProvider)obj.queryLocalInterface(descriptor);
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if (in != null) {
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return in;
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}
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return new ContentProviderProxy(obj);
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}
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@Override
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public boolean onTransact(int code, Parcel data, Parcel reply, int flags)
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throws RemoteException {
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try {
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switch (code) {
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case QUERY_TRANSACTION:
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{
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data.enforceInterface(IContentProvider.descriptor);
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Uri url = Uri.CREATOR.createFromParcel(data);
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// String[] projection
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int num = data.readInt();
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String[] projection = null;
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if (num > 0) {
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projection = new String[num];
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for (int i = 0; i < num; i++) {
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projection[i] = data.readString();
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}
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}
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// String selection, String[] selectionArgs...
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String selection = data.readString();
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num = data.readInt();
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String[] selectionArgs = null;
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if (num > 0) {
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selectionArgs = new String[num];
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for (int i = 0; i < num; i++) {
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selectionArgs[i] = data.readString();
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}
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}
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String sortOrder = data.readString();
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IContentObserver observer = IContentObserver.Stub.
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asInterface(data.readStrongBinder());
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CursorWindow window = CursorWindow.CREATOR.createFromParcel(data);
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// Flag for whether caller wants the number of
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// rows in the cursor and the position of the
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// "_id" column index (or -1 if non-existent)
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// Only to be returned if binder != null.
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boolean wantsCursorMetadata = data.readInt() != 0;
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IBulkCursor bulkCursor = bulkQuery(url, projection, selection,
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selectionArgs, sortOrder, observer, window);
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reply.writeNoException();
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if (bulkCursor != null) {
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reply.writeStrongBinder(bulkCursor.asBinder());
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if (wantsCursorMetadata) {
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reply.writeInt(bulkCursor.count());
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reply.writeInt(BulkCursorToCursorAdaptor.findRowIdColumnIndex(
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bulkCursor.getColumnNames()));
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}
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} else {
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reply.writeStrongBinder(null);
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}
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return true;
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}
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case GET_TYPE_TRANSACTION:
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{
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data.enforceInterface(IContentProvider.descriptor);
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Uri url = Uri.CREATOR.createFromParcel(data);
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String type = getType(url);
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reply.writeNoException();
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reply.writeString(type);
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return true;
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}
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case INSERT_TRANSACTION:
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{
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data.enforceInterface(IContentProvider.descriptor);
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Uri url = Uri.CREATOR.createFromParcel(data);
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ContentValues values = ContentValues.CREATOR.createFromParcel(data);
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Uri out = insert(url, values);
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reply.writeNoException();
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Uri.writeToParcel(reply, out);
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return true;
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}
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case BULK_INSERT_TRANSACTION:
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{
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data.enforceInterface(IContentProvider.descriptor);
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Uri url = Uri.CREATOR.createFromParcel(data);
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ContentValues[] values = data.createTypedArray(ContentValues.CREATOR);
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int count = bulkInsert(url, values);
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reply.writeNoException();
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reply.writeInt(count);
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return true;
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}
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case APPLY_BATCH_TRANSACTION:
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{
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data.enforceInterface(IContentProvider.descriptor);
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final int numOperations = data.readInt();
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final ArrayList<ContentProviderOperation> operations =
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new ArrayList<ContentProviderOperation>(numOperations);
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for (int i = 0; i < numOperations; i++) {
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operations.add(i, ContentProviderOperation.CREATOR.createFromParcel(data));
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}
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final ContentProviderResult[] results = applyBatch(operations);
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reply.writeNoException();
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reply.writeTypedArray(results, 0);
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return true;
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}
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case DELETE_TRANSACTION:
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{
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data.enforceInterface(IContentProvider.descriptor);
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Uri url = Uri.CREATOR.createFromParcel(data);
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String selection = data.readString();
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String[] selectionArgs = data.readStringArray();
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int count = delete(url, selection, selectionArgs);
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reply.writeNoException();
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reply.writeInt(count);
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return true;
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}
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case UPDATE_TRANSACTION:
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{
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data.enforceInterface(IContentProvider.descriptor);
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Uri url = Uri.CREATOR.createFromParcel(data);
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ContentValues values = ContentValues.CREATOR.createFromParcel(data);
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String selection = data.readString();
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String[] selectionArgs = data.readStringArray();
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int count = update(url, values, selection, selectionArgs);
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reply.writeNoException();
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reply.writeInt(count);
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return true;
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}
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case OPEN_FILE_TRANSACTION:
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{
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data.enforceInterface(IContentProvider.descriptor);
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Uri url = Uri.CREATOR.createFromParcel(data);
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String mode = data.readString();
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ParcelFileDescriptor fd;
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fd = openFile(url, mode);
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reply.writeNoException();
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if (fd != null) {
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reply.writeInt(1);
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fd.writeToParcel(reply,
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Parcelable.PARCELABLE_WRITE_RETURN_VALUE);
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} else {
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reply.writeInt(0);
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}
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return true;
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}
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case OPEN_ASSET_FILE_TRANSACTION:
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{
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data.enforceInterface(IContentProvider.descriptor);
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Uri url = Uri.CREATOR.createFromParcel(data);
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String mode = data.readString();
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AssetFileDescriptor fd;
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fd = openAssetFile(url, mode);
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reply.writeNoException();
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if (fd != null) {
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reply.writeInt(1);
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fd.writeToParcel(reply,
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Parcelable.PARCELABLE_WRITE_RETURN_VALUE);
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} else {
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reply.writeInt(0);
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}
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return true;
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}
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case CALL_TRANSACTION:
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{
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data.enforceInterface(IContentProvider.descriptor);
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String method = data.readString();
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String stringArg = data.readString();
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Bundle args = data.readBundle();
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Bundle responseBundle = call(method, stringArg, args);
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reply.writeNoException();
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reply.writeBundle(responseBundle);
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return true;
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}
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}
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} catch (Exception e) {
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DatabaseUtils.writeExceptionToParcel(reply, e);
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return true;
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}
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return super.onTransact(code, data, reply, flags);
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}
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public IBinder asBinder()
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{
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return this;
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}
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}
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final class ContentProviderProxy implements IContentProvider
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{
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public ContentProviderProxy(IBinder remote)
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{
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mRemote = remote;
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}
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public IBinder asBinder()
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{
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return mRemote;
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}
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// Like bulkQuery() but sets up provided 'adaptor' if not null.
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private IBulkCursor bulkQueryInternal(
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Uri url, String[] projection,
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String selection, String[] selectionArgs, String sortOrder,
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IContentObserver observer, CursorWindow window,
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BulkCursorToCursorAdaptor adaptor) throws RemoteException {
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Parcel data = Parcel.obtain();
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Parcel reply = Parcel.obtain();
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data.writeInterfaceToken(IContentProvider.descriptor);
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url.writeToParcel(data, 0);
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int length = 0;
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if (projection != null) {
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length = projection.length;
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}
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data.writeInt(length);
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for (int i = 0; i < length; i++) {
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data.writeString(projection[i]);
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}
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data.writeString(selection);
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if (selectionArgs != null) {
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length = selectionArgs.length;
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} else {
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length = 0;
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}
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data.writeInt(length);
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for (int i = 0; i < length; i++) {
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data.writeString(selectionArgs[i]);
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}
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data.writeString(sortOrder);
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data.writeStrongBinder(observer.asBinder());
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window.writeToParcel(data, 0);
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// Flag for whether or not we want the number of rows in the
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// cursor and the position of the "_id" column index (or -1 if
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// non-existent). Only to be returned if binder != null.
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final boolean wantsCursorMetadata = (adaptor != null);
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data.writeInt(wantsCursorMetadata ? 1 : 0);
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mRemote.transact(IContentProvider.QUERY_TRANSACTION, data, reply, 0);
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DatabaseUtils.readExceptionFromParcel(reply);
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IBulkCursor bulkCursor = null;
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IBinder bulkCursorBinder = reply.readStrongBinder();
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if (bulkCursorBinder != null) {
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bulkCursor = BulkCursorNative.asInterface(bulkCursorBinder);
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if (wantsCursorMetadata) {
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int rowCount = reply.readInt();
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int idColumnPosition = reply.readInt();
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if (bulkCursor != null) {
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adaptor.set(bulkCursor, rowCount, idColumnPosition);
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}
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}
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}
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data.recycle();
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reply.recycle();
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return bulkCursor;
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}
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public IBulkCursor bulkQuery(Uri url, String[] projection,
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String selection, String[] selectionArgs, String sortOrder, IContentObserver observer,
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CursorWindow window) throws RemoteException {
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return bulkQueryInternal(
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url, projection, selection, selectionArgs, sortOrder,
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observer, window,
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null /* BulkCursorToCursorAdaptor */);
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}
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public Cursor query(Uri url, String[] projection, String selection,
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String[] selectionArgs, String sortOrder) throws RemoteException {
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//TODO make a pool of windows so we can reuse memory dealers
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CursorWindow window = new CursorWindow(false /* window will be used remotely */);
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BulkCursorToCursorAdaptor adaptor = new BulkCursorToCursorAdaptor();
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IBulkCursor bulkCursor = bulkQueryInternal(
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url, projection, selection, selectionArgs, sortOrder,
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adaptor.getObserver(), window,
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adaptor);
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if (bulkCursor == null) {
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return null;
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}
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return adaptor;
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}
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public String getType(Uri url) throws RemoteException
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{
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Parcel data = Parcel.obtain();
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Parcel reply = Parcel.obtain();
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data.writeInterfaceToken(IContentProvider.descriptor);
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url.writeToParcel(data, 0);
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mRemote.transact(IContentProvider.GET_TYPE_TRANSACTION, data, reply, 0);
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DatabaseUtils.readExceptionFromParcel(reply);
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String out = reply.readString();
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data.recycle();
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reply.recycle();
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return out;
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}
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public Uri insert(Uri url, ContentValues values) throws RemoteException
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{
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Parcel data = Parcel.obtain();
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Parcel reply = Parcel.obtain();
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data.writeInterfaceToken(IContentProvider.descriptor);
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|
||
|
|
url.writeToParcel(data, 0);
|
||
|
|
values.writeToParcel(data, 0);
|
||
|
|
|
||
|
|
mRemote.transact(IContentProvider.INSERT_TRANSACTION, data, reply, 0);
|
||
|
|
|
||
|
|
DatabaseUtils.readExceptionFromParcel(reply);
|
||
|
|
Uri out = Uri.CREATOR.createFromParcel(reply);
|
||
|
|
|
||
|
|
data.recycle();
|
||
|
|
reply.recycle();
|
||
|
|
|
||
|
|
return out;
|
||
|
|
}
|
||
|
|
|
||
|
|
public int bulkInsert(Uri url, ContentValues[] values) throws RemoteException {
|
||
|
|
Parcel data = Parcel.obtain();
|
||
|
|
Parcel reply = Parcel.obtain();
|
||
|
|
|
||
|
|
data.writeInterfaceToken(IContentProvider.descriptor);
|
||
|
|
|
||
|
|
url.writeToParcel(data, 0);
|
||
|
|
data.writeTypedArray(values, 0);
|
||
|
|
|
||
|
|
mRemote.transact(IContentProvider.BULK_INSERT_TRANSACTION, data, reply, 0);
|
||
|
|
|
||
|
|
DatabaseUtils.readExceptionFromParcel(reply);
|
||
|
|
int count = reply.readInt();
|
||
|
|
|
||
|
|
data.recycle();
|
||
|
|
reply.recycle();
|
||
|
|
|
||
|
|
return count;
|
||
|
|
}
|
||
|
|
|
||
|
|
public ContentProviderResult[] applyBatch(ArrayList<ContentProviderOperation> operations)
|
||
|
|
throws RemoteException, OperationApplicationException {
|
||
|
|
Parcel data = Parcel.obtain();
|
||
|
|
Parcel reply = Parcel.obtain();
|
||
|
|
|
||
|
|
data.writeInterfaceToken(IContentProvider.descriptor);
|
||
|
|
data.writeInt(operations.size());
|
||
|
|
for (ContentProviderOperation operation : operations) {
|
||
|
|
operation.writeToParcel(data, 0);
|
||
|
|
}
|
||
|
|
mRemote.transact(IContentProvider.APPLY_BATCH_TRANSACTION, data, reply, 0);
|
||
|
|
|
||
|
|
DatabaseUtils.readExceptionWithOperationApplicationExceptionFromParcel(reply);
|
||
|
|
final ContentProviderResult[] results =
|
||
|
|
reply.createTypedArray(ContentProviderResult.CREATOR);
|
||
|
|
|
||
|
|
data.recycle();
|
||
|
|
reply.recycle();
|
||
|
|
|
||
|
|
return results;
|
||
|
|
}
|
||
|
|
|
||
|
|
public int delete(Uri url, String selection, String[] selectionArgs)
|
||
|
|
throws RemoteException {
|
||
|
|
Parcel data = Parcel.obtain();
|
||
|
|
Parcel reply = Parcel.obtain();
|
||
|
|
|
||
|
|
data.writeInterfaceToken(IContentProvider.descriptor);
|
||
|
|
|
||
|
|
url.writeToParcel(data, 0);
|
||
|
|
data.writeString(selection);
|
||
|
|
data.writeStringArray(selectionArgs);
|
||
|
|
|
||
|
|
mRemote.transact(IContentProvider.DELETE_TRANSACTION, data, reply, 0);
|
||
|
|
|
||
|
|
DatabaseUtils.readExceptionFromParcel(reply);
|
||
|
|
int count = reply.readInt();
|
||
|
|
|
||
|
|
data.recycle();
|
||
|
|
reply.recycle();
|
||
|
|
|
||
|
|
return count;
|
||
|
|
}
|
||
|
|
|
||
|
|
public int update(Uri url, ContentValues values, String selection,
|
||
|
|
String[] selectionArgs) throws RemoteException {
|
||
|
|
Parcel data = Parcel.obtain();
|
||
|
|
Parcel reply = Parcel.obtain();
|
||
|
|
|
||
|
|
data.writeInterfaceToken(IContentProvider.descriptor);
|
||
|
|
|
||
|
|
url.writeToParcel(data, 0);
|
||
|
|
values.writeToParcel(data, 0);
|
||
|
|
data.writeString(selection);
|
||
|
|
data.writeStringArray(selectionArgs);
|
||
|
|
|
||
|
|
mRemote.transact(IContentProvider.UPDATE_TRANSACTION, data, reply, 0);
|
||
|
|
|
||
|
|
DatabaseUtils.readExceptionFromParcel(reply);
|
||
|
|
int count = reply.readInt();
|
||
|
|
|
||
|
|
data.recycle();
|
||
|
|
reply.recycle();
|
||
|
|
|
||
|
|
return count;
|
||
|
|
}
|
||
|
|
|
||
|
|
public ParcelFileDescriptor openFile(Uri url, String mode)
|
||
|
|
throws RemoteException, FileNotFoundException {
|
||
|
|
Parcel data = Parcel.obtain();
|
||
|
|
Parcel reply = Parcel.obtain();
|
||
|
|
|
||
|
|
data.writeInterfaceToken(IContentProvider.descriptor);
|
||
|
|
|
||
|
|
url.writeToParcel(data, 0);
|
||
|
|
data.writeString(mode);
|
||
|
|
|
||
|
|
mRemote.transact(IContentProvider.OPEN_FILE_TRANSACTION, data, reply, 0);
|
||
|
|
|
||
|
|
DatabaseUtils.readExceptionWithFileNotFoundExceptionFromParcel(reply);
|
||
|
|
int has = reply.readInt();
|
||
|
|
ParcelFileDescriptor fd = has != 0 ? reply.readFileDescriptor() : null;
|
||
|
|
|
||
|
|
data.recycle();
|
||
|
|
reply.recycle();
|
||
|
|
|
||
|
|
return fd;
|
||
|
|
}
|
||
|
|
|
||
|
|
public AssetFileDescriptor openAssetFile(Uri url, String mode)
|
||
|
|
throws RemoteException, FileNotFoundException {
|
||
|
|
Parcel data = Parcel.obtain();
|
||
|
|
Parcel reply = Parcel.obtain();
|
||
|
|
|
||
|
|
data.writeInterfaceToken(IContentProvider.descriptor);
|
||
|
|
|
||
|
|
url.writeToParcel(data, 0);
|
||
|
|
data.writeString(mode);
|
||
|
|
|
||
|
|
mRemote.transact(IContentProvider.OPEN_ASSET_FILE_TRANSACTION, data, reply, 0);
|
||
|
|
|
||
|
|
DatabaseUtils.readExceptionWithFileNotFoundExceptionFromParcel(reply);
|
||
|
|
int has = reply.readInt();
|
||
|
|
AssetFileDescriptor fd = has != 0
|
||
|
|
? AssetFileDescriptor.CREATOR.createFromParcel(reply) : null;
|
||
|
|
|
||
|
|
data.recycle();
|
||
|
|
reply.recycle();
|
||
|
|
|
||
|
|
return fd;
|
||
|
|
}
|
||
|
|
|
||
|
|
public Bundle call(String method, String request, Bundle args)
|
||
|
|
throws RemoteException {
|
||
|
|
Parcel data = Parcel.obtain();
|
||
|
|
Parcel reply = Parcel.obtain();
|
||
|
|
|
||
|
|
data.writeInterfaceToken(IContentProvider.descriptor);
|
||
|
|
|
||
|
|
data.writeString(method);
|
||
|
|
data.writeString(request);
|
||
|
|
data.writeBundle(args);
|
||
|
|
|
||
|
|
mRemote.transact(IContentProvider.CALL_TRANSACTION, data, reply, 0);
|
||
|
|
|
||
|
|
DatabaseUtils.readExceptionFromParcel(reply);
|
||
|
|
Bundle bundle = reply.readBundle();
|
||
|
|
|
||
|
|
data.recycle();
|
||
|
|
reply.recycle();
|
||
|
|
|
||
|
|
return bundle;
|
||
|
|
}
|
||
|
|
|
||
|
|
private IBinder mRemote;
|
||
|
|
}
|