/*
 * Copyright 2000-2001 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.security.provider.certpath;

import java.io.IOException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.security.cert.CertPathValidatorException;

/**
 * A specification of a PKIX validation state
 * which is initialized by each build and updated each time a
 * certificate is added to the current path.
 *
 * @since       1.4
 * @author      Sean Mullan
 * @author      Yassir Elley
 */

interface State extends Cloneable {

    /**
     * Update the state with the next certificate added to the path.
     *
     * @param cert the certificate which is used to update the state
     */
    public void updateState(X509Certificate cert)
        throws CertificateException, IOException, CertPathValidatorException;

    /**
     * Creates and returns a copy of this object
     */
    public Object clone();

    /**
     * Returns a boolean flag indicating if the state is initial
     * (just starting)
     *
     * @return boolean flag indicating if the state is initial (just starting)
     */
    public boolean isInitial();

    /**
     * Returns a boolean flag indicating if a key lacking necessary key
     * algorithm parameters has been encountered.
     *
     * @return boolean flag indicating if key lacking parameters encountered.
     */
    public boolean keyParamsNeeded();
}