/****************************************************************************
 * Copyright (C) 2012-2013 ecsec GmbH.
 * All rights reserved.
 * Contact: ecsec GmbH (info@ecsec.de)
 *
 * This file is part of the Open eCard App.
 *
 * GNU General Public License Usage
 * This file may be used under the terms of the GNU General Public
 * License version 3.0 as published by the Free Software Foundation
 * and appearing in the file LICENSE.GPL included in the packaging of
 * this file. Please review the following information to ensure the
 * GNU General Public License version 3.0 requirements will be met:
 * http://www.gnu.org/copyleft/gpl.html.
 *
 * Other Usage
 * Alternatively, this file may be used in accordance with the terms
 * and conditions contained in a signed written agreement between
 * you and ecsec GmbH.
 *
 ***************************************************************************/

package org.openecard.scio.osx;

import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.Provider;
import javax.smartcardio.CardTerminals;
import javax.smartcardio.TerminalFactorySpi;

/**
 * OS X PC/SC provider. For more information see {@link package-info}.
 * 
 * @author Benedikt Biallowons <benedikt.biallowons@ecsec.de>
 */
public final class SunOSXPCSC extends Provider {

  private static final long serialVersionUID = -8720099822090870310L;

  /**
   * Default constructor registering this provider.
   */
  public SunOSXPCSC() {
    super("SunOSXPCSC", 1.0d, "Sun OS X PC/SC provider");
    AccessController.doPrivileged(new PrivilegedAction<Void>() {
      public Void run() {
        put("TerminalFactory.PC/SC",
            "org.openecard.scio.osx.SunOSXPCSC$Factory");
        return null;
      }
    });
  }

  /**
   * Internal provider factory. For more information see
   * {@link TerminalFactorySpi}
   * 
   * @author Benedikt Biallowons <benedikt.biallowons@ecsec.de>
   */
  public static final class Factory extends TerminalFactorySpi {
    /**
     * Constructor checking availability & initializing context.
     * 
     * @param obj
     *          provider parameters
     * @throws PCSCException
     *           if problems occur.
     */
    public Factory(Object obj) throws PCSCException {
      if (obj != null) {
        throw new IllegalArgumentException(
            "SunOSXPCSC factory doesn't take parameters");
      }
      PCSC.checkAvailable();
      PCSCTerminals.initContext();
    }

    /**
     * Returns the available readers. This must be a new object for each call.
     * 
     * @return CardTerminals card terminals wrapper object
     */
    @Override
    protected CardTerminals engineTerminals() {
      return new PCSCTerminals();
    }
  }

}