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/*
* 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 com.android.internal.telephony.cdma;
import java.util.concurrent.atomic.AtomicInteger;
import com.android.internal.telephony.CommandsInterface;
import com.android.internal.telephony.RILConstants;
import android.content.Context;
import android.os.AsyncResult;
import android.os.Handler;
import android.os.Message;
import android.os.Registrant;
import android.os.RegistrantList;
import android.provider.Settings;
import android.telephony.Rlog;
/**
* Class that handles the CDMA subscription source changed events from RIL
*/
public class CdmaSubscriptionSourceManager extends Handler {
static final String LOG_TAG = "CDMA";
private static final int EVENT_CDMA_SUBSCRIPTION_SOURCE_CHANGED = 1;
private static final int EVENT_GET_CDMA_SUBSCRIPTION_SOURCE = 2;
private static final int EVENT_RADIO_ON = 3;
public static final int SUBSCRIPTION_SOURCE_UNKNOWN = -1;
public static final int SUBSCRIPTION_FROM_RUIM = 0; /* CDMA subscription from RUIM */
public static final int SUBSCRIPTION_FROM_NV = 1; /* CDMA subscription from NV */
public static final int PREFERRED_CDMA_SUBSCRIPTION = SUBSCRIPTION_FROM_NV;
private static CdmaSubscriptionSourceManager sInstance;
private static final Object sReferenceCountMonitor = new Object();
private static int sReferenceCount = 0;
// ***** Instance Variables
private CommandsInterface mCM;
private Context mContext;
private RegistrantList mCdmaSubscriptionSourceChangedRegistrants = new RegistrantList();
// Type of CDMA subscription source
private AtomicInteger mCdmaSubscriptionSource = new AtomicInteger(SUBSCRIPTION_FROM_NV);
// Constructor
private CdmaSubscriptionSourceManager(Context context, CommandsInterface ci) {
mContext = context;
mCM = ci;
mCM.registerForCdmaSubscriptionChanged(this, EVENT_CDMA_SUBSCRIPTION_SOURCE_CHANGED, null);
mCM.registerForOn(this, EVENT_RADIO_ON, null);
int subscriptionSource = getDefaultCdmaSubscriptionSource();
mCdmaSubscriptionSource.set(subscriptionSource);
}
/**
* This function creates a single instance of this class
*
* @return object of type CdmaSubscriptionSourceManager
*/
public static CdmaSubscriptionSourceManager getInstance(Context context,
CommandsInterface ci, Handler h, int what, Object obj) {
synchronized (sReferenceCountMonitor) {
if (null == sInstance) {
sInstance = new CdmaSubscriptionSourceManager(context, ci);
}
sInstance.sReferenceCount++;
}
sInstance.registerForCdmaSubscriptionSourceChanged(h, what, obj);
return sInstance;
}
/**
* Unregisters for the registered event with RIL
*/
public void dispose(Handler h) {
mCdmaSubscriptionSourceChangedRegistrants.remove(h);
synchronized (sReferenceCountMonitor) {
sReferenceCount--;
if (sReferenceCount <= 0) {
mCM.unregisterForCdmaSubscriptionChanged(this);
mCM.unregisterForOn(this);
sInstance = null;
}
}
}
/*
* (non-Javadoc)
* @see android.os.Handler#handleMessage(android.os.Message)
*/
@Override
public void handleMessage(Message msg) {
AsyncResult ar;
switch (msg.what) {
case EVENT_CDMA_SUBSCRIPTION_SOURCE_CHANGED:
case EVENT_GET_CDMA_SUBSCRIPTION_SOURCE:
{
log("CDMA_SUBSCRIPTION_SOURCE event = " + msg.what);
ar = (AsyncResult) msg.obj;
handleGetCdmaSubscriptionSource(ar);
}
break;
case EVENT_RADIO_ON: {
mCM.getCdmaSubscriptionSource(obtainMessage(EVENT_GET_CDMA_SUBSCRIPTION_SOURCE));
}
break;
default:
super.handleMessage(msg);
}
}
/**
* Returns the current CDMA subscription source value
* @return CDMA subscription source value
*/
public int getCdmaSubscriptionSource() {
return mCdmaSubscriptionSource.get();
}
/**
* Gets the default CDMA subscription source
*
* @return Default CDMA subscription source from Settings DB if present.
*/
private int getDefaultCdmaSubscriptionSource() {
// Get the default value from the Settings
int subscriptionSource = Settings.Global.getInt(mContext.getContentResolver(),
Settings.Global.CDMA_SUBSCRIPTION_MODE, PREFERRED_CDMA_SUBSCRIPTION);
return subscriptionSource;
}
/**
* Clients automatically register for CDMA subscription source changed event
* when they get an instance of this object.
*/
private void registerForCdmaSubscriptionSourceChanged(Handler h, int what, Object obj) {
Registrant r = new Registrant (h, what, obj);
mCdmaSubscriptionSourceChangedRegistrants.add(r);
}
/**
* Handles the call to get the subscription source
*
* @param ar AsyncResult object that contains the result of get CDMA
* subscription source call
*/
private void handleGetCdmaSubscriptionSource(AsyncResult ar) {
if ((ar.exception == null) && (ar.result != null)) {
int newSubscriptionSource = ((int[]) ar.result)[0];
if (newSubscriptionSource != mCdmaSubscriptionSource.get()) {
log("Subscription Source Changed : " + mCdmaSubscriptionSource + " >> "
+ newSubscriptionSource);
mCdmaSubscriptionSource.set(newSubscriptionSource);
// Notify registrants of the new CDMA subscription source
mCdmaSubscriptionSourceChangedRegistrants.notifyRegistrants(new AsyncResult(null,
null, null));
}
} else {
// GET_CDMA_SUBSCRIPTION is returning Failure. Probably
// because modem created GSM Phone. If modem created
// GSMPhone, then PhoneProxy will trigger a change in
// Phone objects and this object will be destroyed.
logw("Unable to get CDMA Subscription Source, Exception: " + ar.exception
+ ", result: " + ar.result);
}
}
private void log(String s) {
Rlog.d(LOG_TAG, "[CdmaSSM] " + s);
}
private void loge(String s) {
Rlog.e(LOG_TAG, "[CdmaSSM] " + s);
}
private void logw(String s) {
Rlog.w(LOG_TAG, "[CdmaSSM] " + s);
}
}
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