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/* * 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 * or visit www.oracle.com if you need additional information or have any * questions. */ 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 =            new DefaultNTLMAuthenticationCallback();     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);     static class DefaultNTLMAuthenticationCallback extends NTLMAuthenticationCallback {        @Override        public boolean isTrustedSite(URL url) { return true; }    }}