/*
 * Copyright 2002-2006 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 java.security.cert;

import java.util.*;

import sun.security.provider.certpath.CertPathHelper;

import sun.security.x509.GeneralNameInterface;

/**
 * Helper class that allows the Sun CertPath provider to access
 * implementation dependent APIs in CertPath framework.
 *
 * @author Andreas Sterbenz
 */
class CertPathHelperImpl extends CertPathHelper {

    private CertPathHelperImpl() {
        // empty
    }

    /**
     * Initialize the helper framework. This method must be called from
     * the static initializer of each class that is the target of one of
     * the methods in this class. This ensures that the helper if initialized
     * prior to a tunneled call from the Sun provider.
     */
    synchronized static void initialize() {
        if (CertPathHelper.instance == null) {
            CertPathHelper.instance = new CertPathHelperImpl();
        }
    }

    protected void implSetPathToNames(X509CertSelector sel,
            Set<GeneralNameInterface> names) {
        sel.setPathToNamesInternal(names);
    }
}