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/*
* Copyright (C) 2009 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.content;
import android.database.Cursor;
import android.net.Uri;
import android.os.RemoteException;
import android.os.ParcelFileDescriptor;
import android.content.res.AssetFileDescriptor;
import java.io.FileNotFoundException;
import java.util.ArrayList;
/**
* The public interface object used to interact with a {@link ContentProvider}. This is obtained by
* calling {@link ContentResolver#acquireContentProviderClient}. This object must be released
* using {@link #release} in order to indicate to the system that the {@link ContentProvider} is
* no longer needed and can be killed to free up resources.
*/
public class ContentProviderClient {
private final IContentProvider mContentProvider;
private final ContentResolver mContentResolver;
/**
* @hide
*/
ContentProviderClient(ContentResolver contentResolver, IContentProvider contentProvider) {
mContentProvider = contentProvider;
mContentResolver = contentResolver;
}
/** see {@link ContentProvider#query} */
public Cursor query(Uri url, String[] projection, String selection,
String[] selectionArgs, String sortOrder) throws RemoteException {
return mContentProvider.query(url, projection, selection, selectionArgs, sortOrder);
}
/** see {@link ContentProvider#getType} */
public String getType(Uri url) throws RemoteException {
return mContentProvider.getType(url);
}
/** see {@link ContentProvider#insert} */
public Uri insert(Uri url, ContentValues initialValues)
throws RemoteException {
return mContentProvider.insert(url, initialValues);
}
/** see {@link ContentProvider#bulkInsert} */
public int bulkInsert(Uri url, ContentValues[] initialValues) throws RemoteException {
return mContentProvider.bulkInsert(url, initialValues);
}
/** see {@link ContentProvider#delete} */
public int delete(Uri url, String selection, String[] selectionArgs)
throws RemoteException {
return mContentProvider.delete(url, selection, selectionArgs);
}
/** see {@link ContentProvider#update} */
public int update(Uri url, ContentValues values, String selection,
String[] selectionArgs) throws RemoteException {
return mContentProvider.update(url, values, selection, selectionArgs);
}
/** see {@link ContentProvider#openFile} */
public ParcelFileDescriptor openFile(Uri url, String mode)
throws RemoteException, FileNotFoundException {
return mContentProvider.openFile(url, mode);
}
/** see {@link ContentProvider#openAssetFile} */
public AssetFileDescriptor openAssetFile(Uri url, String mode)
throws RemoteException, FileNotFoundException {
return mContentProvider.openAssetFile(url, mode);
}
/**
* see {@link ContentProvider#queryEntities}
* @hide
*/
public EntityIterator queryEntities(Uri uri, String selection, String[] selectionArgs,
String sortOrder) throws RemoteException {
return mContentProvider.queryEntities(uri, selection, selectionArgs, sortOrder);
}
/** see {@link ContentProvider#applyBatch} */
public ContentProviderResult[] applyBatch(ArrayList<ContentProviderOperation> operations)
throws RemoteException, OperationApplicationException {
return mContentProvider.applyBatch(operations);
}
/**
* Call this to indicate to the system that the associated {@link ContentProvider} is no
* longer needed by this {@link ContentProviderClient}.
* @return true if this was release, false if it was already released
*/
public boolean release() {
return mContentResolver.releaseProvider(mContentProvider);
}
/**
* Get a reference to the {@link ContentProvider} that is associated with this
* client. If the {@link ContentProvider} is running in a different process then
* null will be returned. This can be used if you know you are running in the same
* process as a provider, and want to get direct access to its implementation details.
*
* @return If the associated {@link ContentProvider} is local, returns it.
* Otherwise returns null.
*/
public ContentProvider getLocalContentProvider() {
return ContentProvider.coerceToLocalContentProvider(mContentProvider);
}
}
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