Android Open Source - DroidUPnP Device Discovery

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License

The source code is released under:

GNU General Public License

Java Source Code

/**
 * Copyright (C) 2013 Aurlien Chabot <aurelien@chabot.fr>
 * /*  www  . ja v a 2  s  . c  om*/
 * This file is part of DroidUPNP.
 * 
 * DroidUPNP is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * DroidUPNP 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with DroidUPNP.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.droidupnp.model.upnp;

import java.util.ArrayList;
import java.util.Collection;

import org.droidupnp.Main;

import android.util.Log;

public abstract class DeviceDiscovery {

  protected static final String TAG = "DeviceDiscovery";

  private final BrowsingRegistryListener browsingRegistryListener;

  protected boolean extendedInformation;

  private final ArrayList<IDeviceDiscoveryObserver> observerList;

  public DeviceDiscovery(IServiceListener serviceListener, boolean extendedInformation)
  {
    browsingRegistryListener = new BrowsingRegistryListener();
    this.extendedInformation = extendedInformation;
    observerList = new ArrayList<IDeviceDiscoveryObserver>();
  }

  public DeviceDiscovery(IServiceListener serviceListener)
  {
    this(serviceListener, false);
  }

  public void resume(IServiceListener serviceListener)
  {
    serviceListener.addListener(browsingRegistryListener);
  }

  public void pause(IServiceListener serviceListener)
  {
    serviceListener.removeListener(browsingRegistryListener);
  }

  public class BrowsingRegistryListener implements IRegistryListener {

    @Override
    public void deviceAdded(final IUpnpDevice device)
    {
      Log.v(TAG, "New device detected : " + device.getDisplayString());

      if (device.isFullyHydrated() && filter(device))
      {
        if (isSelected(device))
        {
          Log.i(TAG, "Reselect device to refresh it");
          select(device, true);
        }

        notifyAdded(device);
      }
    }

    @Override
    public void deviceRemoved(final IUpnpDevice device)
    {
      Log.v(TAG, "Device removed : " + device.getFriendlyName());

      if (filter(device))
      {
        if (isSelected(device))
        {
          Log.i(TAG, "Selected device have been removed");
          removed(device);
        }

        notifyRemoved(device);
      }
    }
  }

  public void addObserver(IDeviceDiscoveryObserver o)
  {
    observerList.add(o);

    final Collection<IUpnpDevice> upnpDevices = Main.upnpServiceController.getServiceListener()
        .getFilteredDeviceList(getCallableFilter());
    for (IUpnpDevice d : upnpDevices)
      o.addedDevice(d);
  }

  public void removeObserver(IDeviceDiscoveryObserver o)
  {
    observerList.remove(o);
  }

  public void notifyAdded(IUpnpDevice device)
  {
    for (IDeviceDiscoveryObserver o : observerList)
      o.addedDevice(device);
  }

  public void notifyRemoved(IUpnpDevice device)
  {
    for (IDeviceDiscoveryObserver o : observerList)
      o.removedDevice(device);
  }

  /**
   * Filter device you want to add to this device list fragment
   * 
   * @param device
   *            the device to test
   * @return add it or not
   * @throws Exception
   */
  protected boolean filter(IUpnpDevice device)
  {
    ICallableFilter filter = getCallableFilter();
    filter.setDevice(device);
    try
    {
      return filter.call();
    }
    catch (Exception e)
    {
      e.printStackTrace();
    }
    return false;
  }

  /**
   * Get a callable device filter
   * 
   * @return
   */
  protected abstract ICallableFilter getCallableFilter();

  /**
   * Filter to know if device is selected
   * 
   * @param d
   * @return
   */
  protected abstract boolean isSelected(IUpnpDevice d);

  /**
   * Select a device
   * 
   * @param device
   */
  protected abstract void select(IUpnpDevice device);

  /**
   * Select a device
   * 
   * @param device
   * @param force
   */
  protected abstract void select(IUpnpDevice device, boolean force);

  /**
   * Callback when device removed
   * 
   * @param d
   */
  protected abstract void removed(IUpnpDevice d);
}

Java Source Code List

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