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 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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package com.sun.security.auth;

import java.security.Principal;
import javax.naming.InvalidNameException;
import javax.naming.ldap.LdapName;

A principal identified by a distinguished name as specified by
RFC 2253.
 After successful authentication, a user Principal can be associated with a particular Subject to augment that Subject with an additional identity.
Authorization decisions can then be based upon the
Principals that are associated with a Subject.

This class is immutable.
Since:
1.6/**
 * A principal identified by a distinguished name as specified by
 * <a href="http://www.ietf.org/rfc/rfc2253.txt">RFC 2253</a>.
 *
 * <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
 */
@jdk.Exported
public final class LdapPrincipal implements Principal, java.io.Serializable {

    private static final long serialVersionUID = 6820120005580754861L;

    
The principal's string name
@serial
/**
     * The principal's string name
     *
     * @serial
     */
    private final String nameString;

    
The principal's name
@serial
/**
     * The principal's name
     *
     * @serial
     */
    private final LdapName name;

    
Creates an LDAP principal.
Params:
name – The principal's string distinguished name.
Throws:
InvalidNameException – If a syntax violation is detected.
NullPointerException – If the name is
null./**
     * Creates an LDAP principal.
     *
     * @param name The principal's string distinguished name.
     * @throws InvalidNameException If a syntax violation is detected.
     * @exception NullPointerException If the <code>name</code> is
     * <code>null</code>.
     */
    public LdapPrincipal(String name) throws InvalidNameException {
        if (name == null) {
            throw new NullPointerException("null name is illegal");
        }
        this.name = getLdapName(name);
        nameString = name;
    }

    
Compares this principal to the specified object.
Params:
object – The object to compare this principal against.
Returns:
true if they are equal; false otherwise./**
     * 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 LdapPrincipal) {
            try {

                return
                    name.equals(getLdapName(((LdapPrincipal)object).getName()));

            } catch (InvalidNameException e) {
                return false;
            }
        }
        return false;
    }

    
Computes the hash code for this principal.
Returns:
The principal's hash code./**
     * Computes the hash code for this principal.
     *
     * @return The principal's hash code.
     */
    public int hashCode() {
        return name.hashCode();
    }

    
Returns the name originally used to create this principal.
Returns:
The principal's string name./**
     * Returns the name originally used to create this principal.
     *
     * @return The principal's string name.
     */
    public String getName() {
        return nameString;
    }

    
Creates a string representation of this principal's name in the format
defined by RFC 2253.
If the name has zero components an empty string is returned.
Returns:
The principal's string name./**
     * Creates a string representation of this principal's name in the format
     * defined by <a href="http://www.ietf.org/rfc/rfc2253.txt">RFC 2253</a>.
     * If the name has zero components an empty string is returned.
     *
     * @return The principal's string name.
     */
    public String toString() {
        return name.toString();
    }

    // Create an LdapName object from a string distinguished name.
    private LdapName getLdapName(String name) throws InvalidNameException {
        return new LdapName(name);
    }
}