/*

 * Copyright (c) 2011, 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

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 */

package sun.net.www.protocol.http.ntlm;

import java.net.URL;

/**

 * This class is used to call back to deployment to determine if a given

 * URL is trusted. Transparent authentication (try with logged in users

 * credentials without prompting) should only be tried with trusted sites.

 */

public abstract class NTLMAuthenticationCallback {

    private static volatile NTLMAuthenticationCallback callback;

    public static void setNTLMAuthenticationCallback(

            NTLMAuthenticationCallback callback) {

        NTLMAuthenticationCallback.callback = callback;

    }

    public static NTLMAuthenticationCallback getNTLMAuthenticationCallback() {

        return callback;

    }

    /**

     * Returns true if the given site is trusted, i.e. we can try

     * transparent Authentication.

     */

    public abstract boolean isTrustedSite(URL url);

}