principal.java

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/*
 * @(#)Principal.java	1.4 06/10/10
 *
 * Copyright  1990-2008 Sun Microsystems, Inc. All Rights Reserved.  
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER  
 *   
 * This program 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.   
 *   
 * This program 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 at /legal/license.txt).   
 *   
 * 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 or visit www.sun.com if you need additional  
 * information or have any questions. 
 *
 */

package java.security;

/**
 * This interface represents the abstract notion of a principal, which
 * can be used to represent any entity, such as an individual, a
 * corporation, and a login id.
 *
 * @see java.security.cert.X509Certificate
 *
 * @version 1.19, 00/02/02
 * @author Li Gong
 */
public interface Principal {

    /**
     * Compares this principal to the specified object.  Returns true
     * if the object passed in matches the principal represented by
     * the implementation of this interface.
     *
     * @param another principal to compare with.
     *
     * @return true if the principal passed in is the same as that
     * encapsulated by this principal, and false otherwise.

     */
    public boolean equals(Object another);

    /**
     * Returns a string representation of this principal.
     *
     * @return a string representation of this principal.
     */
    public String toString();

    /**
     * Returns a hashcode for this principal.
     *
     * @return a hashcode for this principal.
     */
    public int hashCode();

    /**
     * Returns the name of this principal.
     *
     * @return the name of this principal.
     */
    public String getName();
}