/* * Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * 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 * or visit www.oracle.com if you need additional information or have any * questions. */ package javax.smartcardio; import java.util.*; /** * The TerminalFactorySpi class defines the service provider interface. * Applications do not access this class directly, instead see * {@linkplain TerminalFactory}. * * <P>Service providers that want to write a new implementation should define * a concrete subclass of TerminalFactorySpi with a constructor that takes * an <code>Object</code> as parameter. That class needs to be registered * in a {@linkplain java.security.Provider}. The engine * {@linkplain java.security.Provider.Service#getType type} is * <code>TerminalFactory</code>. * Service providers also need to implement subclasses of the abstract classes * {@linkplain CardTerminals}, {@linkplain CardTerminal}, {@linkplain Card}, * and {@linkplain CardChannel}. * * <p>For example: * <pre><em>file MyProvider.java:</em> * * package com.somedomain.card; * * import java.security.Provider; * * public class MyProvider extends Provider { *     public MyProvider() { *         super("MyProvider", 1.0d, "Smart Card Example"); *         put("TerminalFactory.MyType", "com.somedomain.card.MySpi"); *     } * } * *<em>file MySpi.java</em> * * package com.somedomain.card; * * import javax.smartcardio.*; * * public class MySpi extends TerminalFactoySpi { *      public MySpi(Object parameter) { *          // initialize as appropriate *      } *      protected CardTerminals engineTerminals() { *          // add implementation code here *      } * } * </pre> * * @see TerminalFactory * @see java.security.Provider * * @since   1.6 * @author  Andreas Sterbenz * @author  JSR 268 Expert Group */public abstract class TerminalFactorySpi {     /**     * Constructs a new TerminalFactorySpi object.     *     * <p>This class is part of the service provider interface and not accessed     * directly by applications. Applications     * should use TerminalFactory objects, which can be obtained by calling     * one of the     * {@linkplain TerminalFactory#getInstance TerminalFactory.getInstance()}     * methods.     *     * <p>Concrete subclasses should define a constructor that takes an     * <code>Object</code> as parameter. It will be invoked when an     * application calls one of the {@linkplain TerminalFactory#getInstance     * TerminalFactory.getInstance()} methods and receives the <code>params</code>     * object specified by the application.     */    protected TerminalFactorySpi() {        // empty    }     /**     * Returns the CardTerminals created by this factory.     *     * @return the CardTerminals created by this factory.     */    protected abstract CardTerminals engineTerminals(); }