Recognizer.java

/****************************************************************************
 * Copyright (C) 2012 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.event;

import iso.std.iso_iec._24727.tech.schema.ConnectionHandleType;
import iso.std.iso_iec._24727.tech.schema.ConnectionHandleType.RecognitionInfo;
import org.openecard.common.enums.EventType;
import org.openecard.common.util.HandlerUtils;
import org.openecard.recognition.RecognitionException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


/**
 * Wrapper to start the card recognition easily as a thread.
 *
 * @author Tobias Wich
 */
public class Recognizer implements Runnable {

    private final static Logger logger = LoggerFactory.getLogger(Recognizer.class);

    private final EventManager manager;
    private final ConnectionHandleType handle;

    public Recognizer(EventManager manager, ConnectionHandleType handle) {
	this.manager = manager;
	this.handle = handle;
    }

    @Override
    public void run() {
	ConnectionHandleType newHandle = recognizeSlot();
	if (newHandle != null) {
	    logger.debug("Found a recognized card event ({}).", handle.getIFDName());
	    manager.notify(EventType.CARD_RECOGNIZED, newHandle);
	}
    }

    private ConnectionHandleType recognizeSlot() {
	RecognitionInfo rInfo = null;
	try {
	    rInfo = manager.cr.recognizeCard(handle.getIFDName(), handle.getSlotIndex());
	} catch (RecognitionException ex) {
	    // ignore, card is just unknown
	}

	if (rInfo != null) {
	    ConnectionHandleType newHandle = HandlerUtils.copyHandle(handle);
	    newHandle.getRecognitionInfo().setCardType(rInfo.getCardType());
	    // Remove card identifier (ATR/ATS) as TR-03112-4 states that this should contain the ATR/ATS for unknown
	    // cards and the ICCSN or something similar for known cards. Until we extract the ICCSN just remove the ATR.
	    newHandle.getRecognitionInfo().setCardIdentifier(null);
	    return newHandle;
	} else {
	    return null;
	}
    }

}