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/*
* Copyright (C) 2014 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.net;
import android.annotation.SystemService;
import android.content.Context;
import android.net.IEthernetManager;
import android.net.IEthernetServiceListener;
import android.net.IpConfiguration;
import android.os.Handler;
import android.os.Message;
import android.os.RemoteException;
import java.util.ArrayList;
/**
* A class representing the IP configuration of the Ethernet network.
*
* @hide
*/
@SystemService(Context.ETHERNET_SERVICE)
public class EthernetManager {
private static final String TAG = "EthernetManager";
private static final int MSG_AVAILABILITY_CHANGED = 1000;
private final Context mContext;
private final IEthernetManager mService;
private final Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
if (msg.what == MSG_AVAILABILITY_CHANGED) {
boolean isAvailable = (msg.arg1 == 1);
for (Listener listener : mListeners) {
listener.onAvailabilityChanged(isAvailable);
}
}
}
};
private final ArrayList<Listener> mListeners = new ArrayList<Listener>();
private final IEthernetServiceListener.Stub mServiceListener =
new IEthernetServiceListener.Stub() {
@Override
public void onAvailabilityChanged(boolean isAvailable) {
mHandler.obtainMessage(
MSG_AVAILABILITY_CHANGED, isAvailable ? 1 : 0, 0, null).sendToTarget();
}
};
/**
* A listener interface to receive notification on changes in Ethernet.
*/
public interface Listener {
/**
* Called when Ethernet port's availability is changed.
* @param isAvailable {@code true} if one or more Ethernet port exists.
*/
public void onAvailabilityChanged(boolean isAvailable);
}
/**
* Create a new EthernetManager instance.
* Applications will almost always want to use
* {@link android.content.Context#getSystemService Context.getSystemService()} to retrieve
* the standard {@link android.content.Context#ETHERNET_SERVICE Context.ETHERNET_SERVICE}.
*/
public EthernetManager(Context context, IEthernetManager service) {
mContext = context;
mService = service;
}
/**
* Get Ethernet configuration.
* @return the Ethernet Configuration, contained in {@link IpConfiguration}.
*/
public IpConfiguration getConfiguration() {
try {
return mService.getConfiguration();
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
/**
* Set Ethernet configuration.
*/
public void setConfiguration(IpConfiguration config) {
try {
mService.setConfiguration(config);
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
/**
* Indicates whether the system currently has one or more
* Ethernet interfaces.
*/
public boolean isAvailable() {
try {
return mService.isAvailable();
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
/**
* Adds a listener.
* @param listener A {@link Listener} to add.
* @throws IllegalArgumentException If the listener is null.
*/
public void addListener(Listener listener) {
if (listener == null) {
throw new IllegalArgumentException("listener must not be null");
}
mListeners.add(listener);
if (mListeners.size() == 1) {
try {
mService.addListener(mServiceListener);
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
}
/**
* Removes a listener.
* @param listener A {@link Listener} to remove.
* @throws IllegalArgumentException If the listener is null.
*/
public void removeListener(Listener listener) {
if (listener == null) {
throw new IllegalArgumentException("listener must not be null");
}
mListeners.remove(listener);
if (mListeners.isEmpty()) {
try {
mService.removeListener(mServiceListener);
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
}
}
}
}
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