* method for details on how this is used.
     * <p>
     * This field is initialized to null.
     * It should not be manipulated directly:  it should
     * be accessed and updated using getAltNameCtx() and setAltNameCtx().
     * @serial
     *
     * @see #getAltNameCtx
     * @see #setAltNameCtx
     * @see #altName
     * @see javax.naming.spi.ObjectFactory#getObjectInstance
     */
    protected Context altNameCtx = null;

    /**
     * Constructs a new instance of CannotProceedException using an
     * explanation. All unspecified fields default to null.
     *
     * @param	explanation	A possibly null string containing additional
     * 				detail about this exception.
     *	 If null, this exception has no detail message.
     * @see java.lang.Throwable#getMessage
     */
    public CannotProceedException(String explanation) {
	super(explanation);
    }

    /**
      * Constructs a new instance of CannotProceedException.
      * All fields default to null.
      */
    public CannotProceedException() {
	super();
    }

    /**
     * Retrieves the environment that was in effect when this exception
     * was created.
     * @return Possibly null environment property set.
     *		null means no environment was recorded for this exception.
     * @see #setEnvironment
     */
    public Hashtable<?,?> getEnvironment() {
	return environment;
    }

    /**
     * Sets the environment that will be returned when getEnvironment()
     * is called.
     * @param environment A possibly null environment property set.
     * 		null means no environment is being recorded for 
     * 		this exception.
     * @see #getEnvironment
     */
    public void setEnvironment(Hashtable<?,?> environment) {
	this.environment = environment;	// %%% clone it??
    }

    /**
     * Retrieves the "remaining new name" field of this exception, which is
     * used when this exception is thrown during a rename() operation.
     *
     * @return The possibly null part of the new name that has not been resolved.
     * 		It is a composite name. It can be null, which means
     *		the remaining new name field has not been set.
     *
     * @see #setRemainingNewName
     */
    public Name getRemainingNewName() {
	return remainingNewName;
    }

    /**
     * Sets the "remaining new name" field of this exception.
     * This is the value returned by <code>getRemainingNewName()</code>.
     *<p>
     * <tt>newName</tt> is a composite name. If the intent is to set
     * this field using a compound name or string, you must 
     * "stringify" the compound name, and create a composite
     * name with a single component using the string. You can then
     * invoke this method using the resulting composite name.
     *<p>
     * A copy of <code>newName</code> is made and stored.
     * Subsequent changes to <code>name</code> does not
     * affect the copy in this NamingException and vice versa.
     *
     * @param newName The possibly null name to set the "remaining new name" to.
     *		If null, it sets the remaining name field to null.
     *
     * @see #getRemainingNewName
     */
    public void setRemainingNewName(Name newName) {
	if (newName != null)
	    this.remainingNewName = (Name)(newName.clone());
	else
	    this.remainingNewName = null;
    }

    /**
     * Retrieves the <code>altName</code> field of this exception.