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JDK 1.6
  javax.management.remote. JMXPrincipal View Javadoc
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/*
 * @(#)JMXPrincipal.java	1.15 05/11/17
 * 
 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */


package javax.management.remote;

import java.io.Serializable;
import java.security.Principal;

/**
 * <p>The identity of a remote client of the JMX Remote API.</p>
 *
 * <p>Principals such as this <code>JMXPrincipal</code>
 * may be associated with a particular <code>Subject</code>
 * to augment that <code>Subject</code> with an additional
 * identity.  Refer to the {@link javax.security.auth.Subject}
 * class for more information on how to achieve this.  
 * Authorization decisions can then be based upon 
 * the Principals associated with a <code>Subject</code>.
 * 
 * @see java.security.Principal
 * @see javax.security.auth.Subject
 * @since 1.5
 * @since.unbundled 1.0
 */
public class JMXPrincipal implements Principal, Serializable {

    private static final long serialVersionUID = -4184480100214577411L;

    /**
     * @serial The JMX Remote API name for the identity represented by
     * this <code>JMXPrincipal</code> object.
     * @see #getName()
     */
    private String name;

    /**
     * <p>Creates a JMXPrincipal for a given identity.</p>
     *
     * @param name the JMX Remote API name for this identity.
     *
     * @exception NullPointerException if the <code>name</code> is
     * <code>null</code>.
     */
    public JMXPrincipal(String name) {
        if (name == null)
            throw new NullPointerException("illegal null input");

        this.name = name;
    }

    /**
     * Returns the name of this principal.
     *
     * <p>
     *
     * @return the name of this <code>JMXPrincipal</code>.
     */
    public String getName() {
        return name;
    }

    /**
     * Returns a string representation of this <code>JMXPrincipal</code>.
     *
     * <p>
     *
     * @return a string representation of this <code>JMXPrincipal</code>.
     */
    public String toString() {
        return("JMXPrincipal:  " + name);
    }

    /**
     * Compares the specified Object with this <code>JMXPrincipal</code>
     * for equality.  Returns true if the given object is also a
     * <code>JMXPrincipal</code> and the two JMXPrincipals
     * have the same name.
     *
     * <p>
     *
     * @param o Object to be compared for equality with this
     * <code>JMXPrincipal</code>.
     *
     * @return true if the specified Object is equal to this
     * <code>JMXPrincipal</code>.
     */
    public boolean equals(Object o) {
        if (o == null)
            return false;

        if (this == o)
            return true;
 
        if (!(o instanceof JMXPrincipal))
            return false;
        JMXPrincipal that = (JMXPrincipal)o;

        return (this.getName().equals(that.getName()));
    }
 
    /**
     * Returns a hash code for this <code>JMXPrincipal</code>.
     *
     * <p>
     *
     * @return a hash code for this <code>JMXPrincipal</code>.
     */
    public int hashCode() {
        return name.hashCode();
    }
}

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