/*
* Copyright (C) 2012 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.google.android.vending.expansion.downloader;
import com.google.android.vending.expansion.downloader.impl.DownloaderService;
import android.content.Context;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.os.Messenger;
import android.os.RemoteException;
// -- GODOT start --
import java.lang.ref.WeakReference;
// -- GODOT end --
/**
* This class is used by the client activity to proxy requests to the Downloader
* Service.
*
* Most importantly, you must call {@link #CreateProxy} during the {@link
* IDownloaderClient#onServiceConnected} callback in your activity in order to instantiate
* an {@link IDownloaderService} object that you can then use to issue commands to the {@link
* DownloaderService} (such as to pause and resume downloads).
*/
public class DownloaderServiceMarshaller {
public static final int MSG_REQUEST_ABORT_DOWNLOAD =
1;
public static final int MSG_REQUEST_PAUSE_DOWNLOAD =
2;
public static final int MSG_SET_DOWNLOAD_FLAGS =
3;
public static final int MSG_REQUEST_CONTINUE_DOWNLOAD =
4;
public static final int MSG_REQUEST_DOWNLOAD_STATE =
5;
public static final int MSG_REQUEST_CLIENT_UPDATE =
6;
public static final String PARAMS_FLAGS = "flags";
public static final String PARAM_MESSENGER = DownloaderService.EXTRA_MESSAGE_HANDLER;
private static class Proxy implements IDownloaderService {
private Messenger mMsg;
private void send(int method, Bundle params) {
Message m = Message.obtain(null, method);
m.setData(params);
try {
mMsg.send(m);
} catch (RemoteException e) {
e.printStackTrace();
}
}
public Proxy(Messenger msg) {
mMsg = msg;
}
@Override
public void requestAbortDownload() {
send(MSG_REQUEST_ABORT_DOWNLOAD, new Bundle());
}
@Override
public void requestPauseDownload() {
send(MSG_REQUEST_PAUSE_DOWNLOAD, new Bundle());
}
@Override
public void setDownloadFlags(int flags) {
Bundle params = new Bundle();
params.putInt(PARAMS_FLAGS, flags);
send(MSG_SET_DOWNLOAD_FLAGS, params);
}
@Override
public void requestContinueDownload() {
send(MSG_REQUEST_CONTINUE_DOWNLOAD, new Bundle());
}
@Override
public void requestDownloadStatus() {
send(MSG_REQUEST_DOWNLOAD_STATE, new Bundle());
}
@Override
public void onClientUpdated(Messenger clientMessenger) {
Bundle bundle = new Bundle(1);
bundle.putParcelable(PARAM_MESSENGER, clientMessenger);
send(MSG_REQUEST_CLIENT_UPDATE, bundle);
}
}
private static class Stub implements IStub {
private IDownloaderService mItf = null;
// -- GODOT start --
private final MessengerHandlerServer mMsgHandler = new MessengerHandlerServer(this);
final Messenger mMessenger = new Messenger(mMsgHandler);
private static class MessengerHandlerServer extends Handler {
private final WeakReference<Stub> mDownloader;
public MessengerHandlerServer(Stub downloader) {
mDownloader = new WeakReference<>(downloader);
}
@Override
public void handleMessage(Message msg) {
Stub downloader = mDownloader.get();
if (downloader != null) {
downloader.handleMessage(msg);
}
}
}
private void handleMessage(Message msg) {
switch (msg.what) {
case MSG_REQUEST_ABORT_DOWNLOAD:
mItf.requestAbortDownload();
break;
case MSG_REQUEST_CONTINUE_DOWNLOAD:
mItf.requestContinueDownload();
break;
case MSG_REQUEST_PAUSE_DOWNLOAD:
mItf.requestPauseDownload();
break;
case MSG_SET_DOWNLOAD_FLAGS:
mItf.setDownloadFlags(msg.getData().getInt(PARAMS_FLAGS));
break;
case MSG_REQUEST_DOWNLOAD_STATE:
mItf.requestDownloadStatus();
break;
case MSG_REQUEST_CLIENT_UPDATE:
mItf.onClientUpdated((Messenger)msg.getData().getParcelable(
PARAM_MESSENGER));
break;
}
}
// -- GODOT end --
public Stub(IDownloaderService itf) {
mItf = itf;
}
@Override
public Messenger getMessenger() {
return mMessenger;
}
@Override
public void connect(Context c) {
}
@Override
public void disconnect(Context c) {
}
}
/**
* Returns a proxy that will marshall calls to IDownloaderService methods
*
* @param ctx
* @return
*/
public static IDownloaderService CreateProxy(Messenger msg) {
return new Proxy(msg);
}
/**
* Returns a stub object that, when connected, will listen for marshalled
* IDownloaderService methods and translate them into calls to the supplied
* interface.
*
* @param itf An implementation of IDownloaderService that will be called
* when remote method calls are unmarshalled.
* @return
*/
public static IStub CreateStub(IDownloaderService itf) {
return new Stub(itf);
}
}