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/*
* Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
*
* 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 org.openintents.openpgp.util;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.IBinder;
import org.openintents.openpgp.IOpenPgpService;
public class OpenPgpServiceConnection {
// callback interface
public interface OnBound {
public void onBound(IOpenPgpService service);
public void onError(Exception e);
}
private Context mApplicationContext;
private IOpenPgpService mService;
private String mProviderPackageName;
private OnBound mOnBoundListener;
/**
* Create new connection
*
* @param context
* @param providerPackageName specify package name of OpenPGP provider,
* e.g., "org.sufficientlysecure.keychain"
*/
public OpenPgpServiceConnection(Context context, String providerPackageName) {
this.mApplicationContext = context.getApplicationContext();
this.mProviderPackageName = providerPackageName;
}
/**
* Create new connection with callback
*
* @param context
* @param providerPackageName specify package name of OpenPGP provider,
* e.g., "org.sufficientlysecure.keychain"
* @param onBoundListener callback, executed when connection to service has been established
*/
public OpenPgpServiceConnection(Context context, String providerPackageName,
OnBound onBoundListener) {
this(context, providerPackageName);
this.mOnBoundListener = onBoundListener;
}
public IOpenPgpService getService() {
return mService;
}
public boolean isBound() {
return (mService != null);
}
private ServiceConnection mServiceConnection = new ServiceConnection() {
public void onServiceConnected(ComponentName name, IBinder service) {
mService = IOpenPgpService.Stub.asInterface(service);
if (mOnBoundListener != null) {
mOnBoundListener.onBound(mService);
}
}
public void onServiceDisconnected(ComponentName name) {
mService = null;
}
};
/**
* If not already bound, bind to service!
*
* @return
*/
public void bindToService() {
// if not already bound...
if (mService == null) {
try {
Intent serviceIntent = new Intent(OpenPgpApi.SERVICE_INTENT);
// NOTE: setPackage is very important to restrict the intent to this provider only!
serviceIntent.setPackage(mProviderPackageName);
boolean connect = mApplicationContext.bindService(serviceIntent, mServiceConnection,
Context.BIND_AUTO_CREATE);
if (!connect) {
throw new Exception("bindService() returned false!");
}
} catch (Exception e) {
if (mOnBoundListener != null) {
mOnBoundListener.onError(e);
}
}
} else {
// already bound, but also inform client about it with callback
if (mOnBoundListener != null) {
mOnBoundListener.onBound(mService);
}
}
}
public void unbindFromService() {
mApplicationContext.unbindService(mServiceConnection);
}
}
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