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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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.
 *
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package javax.management.remote;

import java.io.IOException;
import java.io.InvalidObjectException;
import java.io.ObjectInputStream;
import java.io.Serializable;
import java.security.Principal;


The identity of a remote client of the JMX Remote API.


Principals such as this JMXPrincipal
may be associated with a particular Subject
to augment that Subject with an additional identity. Refer to the Subject class for more information on how to achieve this. Authorization decisions can then be based upon the Principals associated with a Subject.

See Also:
Since:1.5
/**
 * <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
 */
public class JMXPrincipal implements Principal, Serializable {

    private static final long serialVersionUID = -4184480100214577411L;

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

    
Creates a JMXPrincipal for a given identity.

Params:
  • name – the JMX Remote API name for this identity.
Throws:
/**
     * Creates a JMXPrincipal for a given identity.
     *
     * @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) {
        validate(name);
        this.name = name;
    }

    
Returns the name of this principal.

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

    
Returns a string representation of this JMXPrincipal.

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

    
Compares the specified Object with this JMXPrincipal
for equality.  Returns true if the given object is also a
JMXPrincipal and the two JMXPrincipals
have the same name.

Params:
  • o – Object to be compared for equality with this
JMXPrincipal.
Returns:true if the specified Object is equal to this
JMXPrincipal.
/**
     * 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.
     *
     * @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 JMXPrincipal.

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

    private void readObject(ObjectInputStream ois) throws IOException, ClassNotFoundException {
        ObjectInputStream.GetField gf = ois.readFields();
        String principalName = (String)gf.get("name", null);
        try {
            validate(principalName);
            this.name = principalName;
        } catch (NullPointerException e) {
            throw new InvalidObjectException(e.getMessage());
        }
    }

    private static void validate(String name) throws NullPointerException {
        if (name == null)
            throw new NullPointerException("illegal null input");
    }
}