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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

package javax.smartcardio;

import java.nio.ByteBuffer;

/**

 * A Smart Card with which a connection has been established. Card objects

 * are obtained by calling {@link CardTerminal#connect CardTerminal.connect()}.

 *

 * @see CardTerminal

 *

 * @since   1.6

 * @author  Andreas Sterbenz

 * @author  JSR 268 Expert Group

*/

public abstract class Card {

    /**

     * Constructs a new Card object.

     *

     * <p>This constructor is called by subclasses only. Application should

     * call the {@linkplain CardTerminal#connect CardTerminal.connect()}

     * method to obtain a Card

     * object.

     */

    protected Card() {

        // empty

    }

    /**

     * Returns the ATR of this card.

     *

     * @return the ATR of this card.

     */

    public abstract ATR getATR();

    /**

     * Returns the protocol in use for this card.

     *

     * @return the protocol in use for this card, for example "T=0" or "T=1"

     */

    public abstract String getProtocol();

    /**

     * Returns the CardChannel for the basic logical channel. The basic

     * logical channel has a channel number of 0.

     *

     * @throws SecurityException if a SecurityManager exists and the

     *   caller does not have the required

     *   {@linkplain CardPermission permission}

     * @throws IllegalStateException if this card object has been disposed of

     *   via the {@linkplain #disconnect disconnect()} method

     */

    public abstract CardChannel getBasicChannel();

    /**

     * Opens a new logical channel to the card and returns it. The channel is

     * opened by issuing a <code>MANAGE CHANNEL</code> command that should use

     * the format <code>[00 70 00 00 01]</code>.

     *

     * @throws SecurityException if a SecurityManager exists and the

     *   caller does not have the required

     *   {@linkplain CardPermission permission}

     * @throws CardException is a new logical channel could not be opened

     * @throws IllegalStateException if this card object has been disposed of

     *   via the {@linkplain #disconnect disconnect()} method

     */

    public abstract CardChannel openLogicalChannel() throws CardException;

    /**

     * Requests exclusive access to this card.

     *

     * <p>Once a thread has invoked <code>beginExclusive</code>, only this

     * thread is allowed to communicate with this card until it calls

     * <code>endExclusive</code>. Other threads attempting communication

     * will receive a CardException.

     *

     * <p>Applications have to ensure that exclusive access is correctly

     * released. This can be achieved by executing

     * the <code>beginExclusive()</code> and <code>endExclusive</code> calls

     * in a <code>try ... finally</code> block.

     *

     * @throws SecurityException if a SecurityManager exists and the

     *   caller does not have the required

     *   {@linkplain CardPermission permission}

     * @throws CardException if exclusive access has already been set

     *   or if exclusive access could not be established

     * @throws IllegalStateException if this card object has been disposed of

     *   via the {@linkplain #disconnect disconnect()} method

     */

    public abstract void beginExclusive() throws CardException;

    /**

     * Releases the exclusive access previously established using

     * <code>beginExclusive</code>.

     *

     * @throws SecurityException if a SecurityManager exists and the

     *   caller does not have the required

     *   {@linkplain CardPermission permission}

     * @throws IllegalStateException if the active Thread does not currently have

     *   exclusive access to this card or

     *   if this card object has been disposed of

     *   via the {@linkplain #disconnect disconnect()} method

     * @throws CardException if the operation failed

     */

    public abstract void endExclusive() throws CardException;

    /**

     * Transmits a control command to the terminal device.

     *

     * <p>This can be used to, for example, control terminal functions like

     * a built-in PIN pad or biometrics.

     *

     * @param controlCode the control code of the command

     * @param command the command data

     *

     * @throws SecurityException if a SecurityManager exists and the

     *   caller does not have the required

     *   {@linkplain CardPermission permission}

     * @throws NullPointerException if command is null

     * @throws CardException if the card operation failed

     * @throws IllegalStateException if this card object has been disposed of

     *   via the {@linkplain #disconnect disconnect()} method

     */

    public abstract byte[] transmitControlCommand(int controlCode,

            byte[] command) throws CardException;

    /**

     * Disconnects the connection with this card. After this method returns,

     * calling methods on this object or in CardChannels associated with this

     * object that require interaction with the card will raise an

     * IllegalStateException.

     *

     * @param reset whether to reset the card after disconnecting.

     *

     * @throws CardException if the card operation failed

     * @throws SecurityException if a SecurityManager exists and the

     *   caller does not have the required

     *   {@linkplain CardPermission permission}

     */

    public abstract void disconnect(boolean reset) throws CardException;

}