/*
 * Copyright 2000-2002 Sun Microsystems, Inc.  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.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

package sun.nio.ch;

import java.io.FileDescriptor;
import java.io.IOException;


/**
 * An interface that allows translation (and more!).
 *
 * @since 1.4
 */

interface SelChImpl {

    FileDescriptor getFD();

    int getFDVal();

    /**
     * Adds the specified ops if present in interestOps. The specified
     * ops are turned on without affecting the other ops.
     *
     * @return  true iff the new value of sk.readyOps() set by this method
     *          contains at least one bit that the previous value did not
     *          contain
     */
    public boolean translateAndUpdateReadyOps(int ops, SelectionKeyImpl sk);

    /**
     * Sets the specified ops if present in interestOps. The specified
     * ops are turned on, and all other ops are turned off.
     *
     * @return  true iff the new value of sk.readyOps() set by this method
     *          contains at least one bit that the previous value did not
     *          contain
     */
    public boolean translateAndSetReadyOps(int ops, SelectionKeyImpl sk);

    void translateAndSetInterestOps(int ops, SelectionKeyImpl sk);

    int validOps();

    void kill() throws IOException;

}
