/*
* Copyright (C) 2012, Katy Hilgenberg.
* Special acknowledgments to: Knowledge & Data Engineering Group, University of Kassel (http://www.kde.cs.uni-kassel.de).
* Contact: sdcf@cs.uni-kassel.de
*
* This file is part of the SDCFramework (Sensor Data Collection Framework) project.
*
* The SDCFramework is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The SDCFramework is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the SDCFramework. If not, see <http://www.gnu.org/licenses/>.
*/
package de.unikassel.android.sdcframework.transmission;
import java.net.InetAddress;
import java.net.UnknownHostException;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import de.unikassel.android.sdcframework.transmission.facade.ConnectivityWrapper;
/**
* Implementation of the connectivity wrapper.
*
* @author Katy Hilgenberg
*
*/
public class ConnectivityWrapperImpl
implements ConnectivityWrapper
{
/**
* The singleton instance
*/
private static ConnectivityWrapper instance = new ConnectivityWrapperImpl();;
/**
* Constructor
*/
private ConnectivityWrapperImpl()
{
super();
}
/**
* Getter for the singleton instance
*
* @return the singleton instance
*/
public static final ConnectivityWrapper getInstance()
{
return instance;
}
/*
* (non-Javadoc)
*
* @see
* de.unikassel.android.sdcframework.transmission.facade.ConnectivityWrapper
* #isNetworkConnected(int)
*/
@Override
public final boolean isNetworkConnected( Context context, int networkType )
{
if ( networkType < 0
|| ConnectivityManager.isNetworkTypeValid( networkType ) )
{
ConnectivityManager connectivityManager =
(ConnectivityManager) context.getSystemService( Context.CONNECTIVITY_SERVICE );
NetworkInfo networkTypeInfo =
networkType < 0 ? connectivityManager.getActiveNetworkInfo() :
connectivityManager.getNetworkInfo( networkType );
if ( networkTypeInfo != null )
{
if ( networkTypeInfo.isConnectedOrConnecting() )
{
return true;
}
}
}
return false;
}
/*
* (non-Javadoc)
*
* @see
* de.unikassel.android.sdcframework.transmission.facade.ConnectivityWrapper
* #testHostReachability(android.content.Context, java.lang.String)
*/
@Override
public final boolean testHostReachability( Context context, String hostName )
{
// ConnectivityManager connectivityManager =
// (ConnectivityManager) context.getSystemService( Context.CONNECTIVITY_SERVICE );
//
// int hostAddress = addressFromHostName( hostName );
//
// // test for existing route to host
// if ( hostAddress != -1 )
// {
// NetworkInfo networkTypeInfo = connectivityManager.getActiveNetworkInfo();
// if ( networkTypeInfo != null )
// {
// return connectivityManager.requestRouteToHost( networkTypeInfo.getType(), hostAddress );
// }
//
// }
// return false;
try {
InetAddress.getByName(hostName);
return true;
} catch (UnknownHostException e1) {
return false;
}
}
/**
* Does create an integer host address from a host name.
*
* @param hostname
* the host name to get hostAdress for
* @return an integer representation of the host IP or -1 if not successful
*/
@SuppressWarnings( "unused" )
private final static int addressFromHostName( String hostname )
{
try
{
InetAddress inetAddress = InetAddress.getByName( hostname );
byte[] addessBytes = inetAddress.getAddress();
int address = ( addessBytes[ 0 ] & 0xff )
| ( ( addessBytes[ 1 ] & 0xff ) << 8 )
| ( ( addessBytes[ 2 ] & 0xff ) << 16 )
| ( ( addessBytes[ 3 ] & 0xff ) << 24 );
return address;
}
catch ( UnknownHostException e )
{}
return -1;
}
/*
* (non-Javadoc)
*
* @see
* de.unikassel.android.sdcframework.transmission.facade.ConnectivityWrapper
* #isAnyConnectionAvailable(android.content.Context)
*/
@Override
public boolean isAnyConnectionAvailable( Context context )
{
return isNetworkConnected( context, -1 );
}
}