ConnectionManager

import java.io.IOException;
import javax.microedition.io.Connection;
import javax.microedition.io.Connector;
import net.rim.device.api.system.*;

public class ConnectionManager implements GlobalEventListener, CoverageStatusListener {

    private static ConnectionManager _manager;
    private boolean _isSimulator;
    private boolean _mdsSupport;
    private boolean _bisSupport;
    private boolean _wapSupport;
    private boolean _wifiSupport;

    private ConnectionManager(){
        setCoverage();
    }

    public static ConnectionManager getInstance(){
        if (_manager == null) _manager = new ConnectionManager();
        return _manager;
    }

    private boolean isWifi() {
        boolean wifi;
        if (WLANInfo.getWLANState() == 4620) wifi = true;
        else wifi = false;
        return wifi;
    }

    public Connection getConnection(String name, int mode, boolean timeouts) throws IOException  {
        if(DeviceInfo.isSimulator()) name = name.concat(";deviceside=true;ConnectionTimeout=20000");
        else if(isWifi()) name = name.concat(";deviceside=true;interface=wifi");
        else if(_mdsSupport) name = name.concat(";deviceside=false");
        else if(_bisSupport) name = name.concat(";deviceside=false;ConnectionType=mds-public;EndToEndRequired;ConnectionTimeout=45000");
        else if(!_wapSupport) name = name.concat(";deviceside=true");

        return Connector.open(name, mode, timeouts);
    }

    public String getConnectionType() {
        if (_mdsSupport) return "MDS";
        if (_bisSupport) return "BIS-B";
        if (_wapSupport) return "WAP";
        else return "Direct TCP";
    }

    private void setCoverage(){
        if(CoverageInfo.isCoverageSufficient(2)) _mdsSupport = true;
        if(CoverageInfo.isCoverageSufficient(4)) _bisSupport = true;
    }

    public void coverageStatusChanged(int newCoverage) {
        if((newCoverage & 2) == 2) _mdsSupport = true;
        if((newCoverage & 4) == 4) _bisSupport = true;
    }
 }