/*
* Copyright (C) 2011 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.media;
import android.content.ContentValues;
import android.content.IContentProvider;
import android.net.Uri;
import android.os.RemoteException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
/**
* A MediaScanner helper class which enables us to do lazy insertion on the
* given provider. This class manages buffers internally and flushes when they
* are full. Note that you should call flushAll() after using this class.
* {@hide}
*/
public class MediaInserter {
private HashMap<Uri, List<ContentValues>> mRowMap =
new HashMap<Uri, List<ContentValues>>();
private IContentProvider mProvider;
private int mBufferSizePerUri;
public MediaInserter(IContentProvider provider, int bufferSizePerUri) {
mProvider = provider;
mBufferSizePerUri = bufferSizePerUri;
}
public void insert(Uri tableUri, ContentValues values) throws RemoteException {
List<ContentValues> list = mRowMap.get(tableUri);
if (list == null) {
list = new ArrayList<ContentValues>();
mRowMap.put(tableUri, list);
}
list.add(new ContentValues(values));
if (list.size() >= mBufferSizePerUri) {
flush(tableUri);
}
}
public void flushAll() throws RemoteException {
for (Uri tableUri : mRowMap.keySet()){
flush(tableUri);
}
mRowMap.clear();
}
private void flush(Uri tableUri) throws RemoteException {
List<ContentValues> list = mRowMap.get(tableUri);
if (!list.isEmpty()) {
ContentValues[] valuesArray = new ContentValues[list.size()];
valuesArray = list.toArray(valuesArray);
mProvider.bulkInsert(tableUri, valuesArray);
list.clear();
}
}
}