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/* * Copyright (c) 2005, 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 com.sun.security.auth; import java.security.Principal; /** * A user principal identified by a username or account name. * * <p> * After successful authentication, a user {@link java.security.Principal} * can be associated with a particular {@link javax.security.auth.Subject} * to augment that <code>Subject</code> with an additional identity. * Authorization decisions can then be based upon the * <code>Principal</code>s that are associated with a <code>Subject</code>. * * <p> * This class is immutable. * * @since 1.6 */public final class UserPrincipal implements Principal, java.io.Serializable {     private static final long serialVersionUID = 892106070870210969L;     /**     * The principal's name     *     * @serial     */    private final String name;     /**     * Creates a principal.     *     * @param name The principal's string name.     * @exception NullPointerException If the <code>name</code> is     * <code>null</code>.     */    public UserPrincipal(String name) {        if (name == null) {            throw new NullPointerException("null name is illegal");        }        this.name = name;    }     /**     * Compares this principal to the specified object.     *     * @param object The object to compare this principal against.     * @return true if they are equal; false otherwise.     */    public boolean equals(Object object) {        if (this == object) {            return true;        }        if (object instanceof UserPrincipal) {            return name.equals(((UserPrincipal)object).getName());        }        return false;    }     /**     * Returns a hash code for this principal.     *     * @return The principal's hash code.     */    public int hashCode() {        return name.hashCode();    }     /**     * Returns the name of this principal.     *     * @return The principal's name.     */    public String getName() {        return name;    }     /**     * Returns a string representation of this principal.     *     * @return The principal's name.     */    public String toString() {        return name;    }}