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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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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
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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package java.awt;

import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.peer.CheckboxMenuItemPeer;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.EventListener;

import javax.accessibility.Accessible;
import javax.accessibility.AccessibleAction;
import javax.accessibility.AccessibleContext;
import javax.accessibility.AccessibleRole;
import javax.accessibility.AccessibleValue;

import sun.awt.AWTAccessor;

This class represents a check box that can be included in a menu.
Selecting the check box in the menu changes its state from
"on" to "off" or from "off" to "on."
 The following picture depicts a menu which contains an instance of CheckBoxMenuItem: 


 The item labeled Check shows a check box menu item in its "off" state. 
 When a check box menu item is selected, AWT sends an item event to the item. Since the event is an instance of ItemEvent, the processEvent method examines the event and passes it along to processItemEvent. The latter method redirects the event to any ItemListener objects that have registered an interest in item events generated by this menu item. 
Author:
     Sami Shaio
See Also:
ItemEvent
ItemListener
Since:
      1.0/**
 * This class represents a check box that can be included in a menu.
 * Selecting the check box in the menu changes its state from
 * "on" to "off" or from "off" to "on."
 * <p>
 * The following picture depicts a menu which contains an instance
 * of {@code CheckBoxMenuItem}:
 * <p>
 * <img src="doc-files/MenuBar-1.gif"
 * alt="Menu labeled Examples, containing items Basic, Simple, Check, and More
 * Examples. The Check item is a CheckBoxMenuItem instance, in the off state."
 * style="float:center; margin: 7px 10px;">
 * <p>
 * The item labeled {@code Check} shows a check box menu item
 * in its "off" state.
 * <p>
 * When a check box menu item is selected, AWT sends an item event to
 * the item. Since the event is an instance of {@code ItemEvent},
 * the {@code processEvent} method examines the event and passes
 * it along to {@code processItemEvent}. The latter method redirects
 * the event to any {@code ItemListener} objects that have
 * registered an interest in item events generated by this menu item.
 *
 * @author      Sami Shaio
 * @see         java.awt.event.ItemEvent
 * @see         java.awt.event.ItemListener
 * @since       1.0
 */
public class CheckboxMenuItem extends MenuItem implements ItemSelectable, Accessible {

    static {
        /* ensure that the necessary native libraries are loaded */
        Toolkit.loadLibraries();
        if (!GraphicsEnvironment.isHeadless()) {
            initIDs();
        }

        AWTAccessor.setCheckboxMenuItemAccessor(
            new AWTAccessor.CheckboxMenuItemAccessor() {
                public boolean getState(CheckboxMenuItem cmi) {
                    return cmi.state;
                }
            });
    }

   
The state of a checkbox menu item
See Also:
getState()
setState(boolean)
@serial
/**
    * The state of a checkbox menu item
    * @serial
    * @see #getState()
    * @see #setState(boolean)
    */
    private volatile boolean state;

    private transient volatile ItemListener itemListener;

    private static final String base = "chkmenuitem";
    private static int nameCounter = 0;

    /*
     * JDK 1.1 serialVersionUID
     */
     private static final long serialVersionUID = 6190621106981774043L;

    
Create a check box menu item with an empty label.
The item's state is initially set to "off."
Throws:
HeadlessException – if GraphicsEnvironment.isHeadless()
returns true
See Also:
GraphicsEnvironment.isHeadless
Since:
  1.1/**
     * Create a check box menu item with an empty label.
     * The item's state is initially set to "off."
     * @exception HeadlessException if GraphicsEnvironment.isHeadless()
     * returns true
     * @see java.awt.GraphicsEnvironment#isHeadless
     * @since   1.1
     */
    public CheckboxMenuItem() throws HeadlessException {
        this("", false);
    }

    
Create a check box menu item with the specified label.
The item's state is initially set to "off."
Params:
label –  a string label for the check box menu item, or null for an unlabeled menu item.
Throws:
HeadlessException – if GraphicsEnvironment.isHeadless()
returns true
See Also:
GraphicsEnvironment.isHeadless/**
     * Create a check box menu item with the specified label.
     * The item's state is initially set to "off."

     * @param     label   a string label for the check box menu item,
     *                or {@code null} for an unlabeled menu item.
     * @exception HeadlessException if GraphicsEnvironment.isHeadless()
     * returns true
     * @see java.awt.GraphicsEnvironment#isHeadless
     */
    public CheckboxMenuItem(String label) throws HeadlessException {
        this(label, false);
    }

    
Create a check box menu item with the specified label and state.
Params:
label –  a string label for the check box menu item, or null for an unlabeled menu item.
state –  the initial state of the menu item, where true indicates "on" and false indicates "off."
Throws:
HeadlessException – if GraphicsEnvironment.isHeadless()
returns true
See Also:
GraphicsEnvironment.isHeadless
Since:
     1.1/**
     * Create a check box menu item with the specified label and state.
     * @param      label   a string label for the check box menu item,
     *                     or {@code null} for an unlabeled menu item.
     * @param      state   the initial state of the menu item, where
     *                     {@code true} indicates "on" and
     *                     {@code false} indicates "off."
     * @exception HeadlessException if GraphicsEnvironment.isHeadless()
     * returns true
     * @see java.awt.GraphicsEnvironment#isHeadless
     * @since      1.1
     */
    public CheckboxMenuItem(String label, boolean state)
        throws HeadlessException {
        super(label);
        this.state = state;
    }

    
Construct a name for this MenuComponent.  Called by getName() when
the name is null.
/**
     * Construct a name for this MenuComponent.  Called by getName() when
     * the name is null.
     */
    String constructComponentName() {
        synchronized (CheckboxMenuItem.class) {
            return base + nameCounter++;
        }
    }

    
Creates the peer of the checkbox item.  This peer allows us to
change the look of the checkbox item without changing its
functionality.
Most applications do not call this method directly.
See Also:
getToolkit.getToolkit()/**
     * Creates the peer of the checkbox item.  This peer allows us to
     * change the look of the checkbox item without changing its
     * functionality.
     * Most applications do not call this method directly.
     * @see     java.awt.Component#getToolkit()
     */
    public void addNotify() {
        synchronized (getTreeLock()) {
            if (peer == null)
                peer = getComponentFactory().createCheckboxMenuItem(this);
            super.addNotify();
        }
    }

    
Determines whether the state of this check box menu item
is "on" or "off."
See Also:
setState
Returns:
 the state of this check box menu item, where true indicates "on" and false indicates "off"/**
     * Determines whether the state of this check box menu item
     * is "on" or "off."
     *
     * @return      the state of this check box menu item, where
     *                     {@code true} indicates "on" and
     *                     {@code false} indicates "off"
     * @see        #setState
     */
    public boolean getState() {
        return state;
    }

    
Sets this check box menu item to the specified state. The boolean value true indicates "on" while false indicates "off." 
Note that this method should be primarily used to
initialize the state of the check box menu item.
Programmatically setting the state of the check box
menu item will not trigger an ItemEvent. The only way to trigger an ItemEvent is by user interaction. 
Params:
b –  true if the check box menu item is on, otherwise false
See Also:
getState/**
     * Sets this check box menu item to the specified state.
     * The boolean value {@code true} indicates "on" while
     * {@code false} indicates "off."
     *
     * <p>Note that this method should be primarily used to
     * initialize the state of the check box menu item.
     * Programmatically setting the state of the check box
     * menu item will <i>not</i> trigger
     * an {@code ItemEvent}.  The only way to trigger an
     * {@code ItemEvent} is by user interaction.
     *
     * @param      b   {@code true} if the check box
     *             menu item is on, otherwise {@code false}
     * @see        #getState
     */
    public synchronized void setState(boolean b) {
        state = b;
        CheckboxMenuItemPeer peer = (CheckboxMenuItemPeer)this.peer;
        if (peer != null) {
            peer.setState(b);
        }
    }

    
Returns the an array (length 1) containing the checkbox menu item
label or null if the checkbox is not selected.
See Also:
ItemSelectable/**
     * Returns the an array (length 1) containing the checkbox menu item
     * label or null if the checkbox is not selected.
     * @see ItemSelectable
     */
    public synchronized Object[] getSelectedObjects() {
        if (state) {
            Object[] items = new Object[1];
            items[0] = label;
            return items;
        }
        return null;
    }

    
Adds the specified item listener to receive item events from
this check box menu item.  Item events are sent in response to user
actions, but not in response to calls to setState().
If l is null, no exception is thrown and no action is performed.
Refer to AWT Threading Issues for details on AWT's threading model.
Params:
l – the item listener
See Also:
removeItemListener
getItemListeners
setState
ItemEvent
ItemListener
Since:
        1.1/**
     * Adds the specified item listener to receive item events from
     * this check box menu item.  Item events are sent in response to user
     * actions, but not in response to calls to setState().
     * If l is null, no exception is thrown and no action is performed.
     * <p>Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
     * >AWT Threading Issues</a> for details on AWT's threading model.
     *
     * @param         l the item listener
     * @see           #removeItemListener
     * @see           #getItemListeners
     * @see           #setState
     * @see           java.awt.event.ItemEvent
     * @see           java.awt.event.ItemListener
     * @since         1.1
     */
    public synchronized void addItemListener(ItemListener l) {
        if (l == null) {
            return;
        }
        itemListener = AWTEventMulticaster.add(itemListener, l);
        newEventsOnly = true;
    }

    
Removes the specified item listener so that it no longer receives
item events from this check box menu item.
If l is null, no exception is thrown and no action is performed.
Refer to AWT Threading Issues for details on AWT's threading model.
Params:
l – the item listener
See Also:
addItemListener
getItemListeners
ItemEvent
ItemListener
Since:
        1.1/**
     * Removes the specified item listener so that it no longer receives
     * item events from this check box menu item.
     * If l is null, no exception is thrown and no action is performed.
     * <p>Refer to <a href="doc-files/AWTThreadIssues.html#ListenersThreads"
     * >AWT Threading Issues</a> for details on AWT's threading model.
     *
     * @param         l the item listener
     * @see           #addItemListener
     * @see           #getItemListeners
     * @see           java.awt.event.ItemEvent
     * @see           java.awt.event.ItemListener
     * @since         1.1
     */
    public synchronized void removeItemListener(ItemListener l) {
        if (l == null) {
            return;
        }
        itemListener = AWTEventMulticaster.remove(itemListener, l);
    }

    
Returns an array of all the item listeners
registered on this checkbox menuitem.
See Also:
addItemListener
removeItemListener
ItemEvent
ItemListener
Returns:
all of this checkbox menuitem's ItemListeners or an empty array if no item listeners are currently registered
Since:
1.4/**
     * Returns an array of all the item listeners
     * registered on this checkbox menuitem.
     *
     * @return all of this checkbox menuitem's {@code ItemListener}s
     *         or an empty array if no item
     *         listeners are currently registered
     *
     * @see           #addItemListener
     * @see           #removeItemListener
     * @see           java.awt.event.ItemEvent
     * @see           java.awt.event.ItemListener
     * @since 1.4
     */
    public synchronized ItemListener[] getItemListeners() {
        return getListeners(ItemListener.class);
    }

    
Returns an array of all the objects currently registered
as FooListeners upon this CheckboxMenuItem. FooListeners are registered using the
addFooListener method.
 You can specify the listenerType argument with a class literal, such as FooListener.class. For example, you can query a CheckboxMenuItem c for its item listeners with the following code: 
ItemListener[] ils = (ItemListener[])(c.getListeners(ItemListener.class));
If no such listeners exist, this method returns an empty array.
Params:
listenerType – the type of listeners requested; this parameter should specify an interface that descends from java.util.EventListener
Throws:
ClassCastException – if listenerType doesn't specify a class or interface that implements java.util.EventListener
See Also:
getItemListeners
Returns:
an array of all objects registered as
         FooListeners on this checkbox menuitem,
         or an empty array if no such
         listeners have been added
Since:
1.3/**
     * Returns an array of all the objects currently registered
     * as <code><em>Foo</em>Listener</code>s
     * upon this {@code CheckboxMenuItem}.
     * <code><em>Foo</em>Listener</code>s are registered using the
     * <code>add<em>Foo</em>Listener</code> method.
     *
     * <p>
     * You can specify the {@code listenerType} argument
     * with a class literal, such as
     * <code><em>Foo</em>Listener.class</code>.
     * For example, you can query a
     * {@code CheckboxMenuItem c}
     * for its item listeners with the following code:
     *
     * <pre>ItemListener[] ils = (ItemListener[])(c.getListeners(ItemListener.class));</pre>
     *
     * If no such listeners exist, this method returns an empty array.
     *
     * @param listenerType the type of listeners requested; this parameter
     *          should specify an interface that descends from
     *          {@code java.util.EventListener}
     * @return an array of all objects registered as
     *          <code><em>Foo</em>Listener</code>s on this checkbox menuitem,
     *          or an empty array if no such
     *          listeners have been added
     * @exception ClassCastException if {@code listenerType}
     *          doesn't specify a class or interface that implements
     *          {@code java.util.EventListener}
     *
     * @see #getItemListeners
     * @since 1.3
     */
    public <T extends EventListener> T[] getListeners(Class<T> listenerType) {
        EventListener l = null;
        if  (listenerType == ItemListener.class) {
            l = itemListener;
        } else {
            return super.getListeners(listenerType);
        }
        return AWTEventMulticaster.getListeners(l, listenerType);
    }

    // REMIND: remove when filtering is done at lower level
    boolean eventEnabled(AWTEvent e) {
        if (e.id == ItemEvent.ITEM_STATE_CHANGED) {
            if ((eventMask & AWTEvent.ITEM_EVENT_MASK) != 0 ||
                itemListener != null) {
                return true;
            }
            return false;
        }
        return super.eventEnabled(e);
    }

    
Processes events on this check box menu item. If the event is an instance of ItemEvent, this method invokes the processItemEvent method. If the event is not an item event, it invokes processEvent on the superclass. 

Check box menu items currently support only item events.
Note that if the event parameter is null the behavior is unspecified and may result in an exception. 
Params:
e – the event
See Also:
ItemEvent
processItemEvent
Since:
       1.1/**
     * Processes events on this check box menu item.
     * If the event is an instance of {@code ItemEvent},
     * this method invokes the {@code processItemEvent} method.
     * If the event is not an item event,
     * it invokes {@code processEvent} on the superclass.
     * <p>
     * Check box menu items currently support only item events.
     * <p>Note that if the event parameter is {@code null}
     * the behavior is unspecified and may result in an
     * exception.
     *
     * @param        e the event
     * @see          java.awt.event.ItemEvent
     * @see          #processItemEvent
     * @since        1.1
     */
    protected void processEvent(AWTEvent e) {
        if (e instanceof ItemEvent) {
            processItemEvent((ItemEvent)e);
            return;
        }
        super.processEvent(e);
    }

    
Processes item events occurring on this check box menu item by dispatching them to any registered ItemListener objects. 

This method is not called unless item events are
enabled for this menu item. Item events are enabled
when one of the following occurs:

An ItemListener object is registered via addItemListener. 
Item events are enabled via enableEvents. 
Note that if the event parameter is null the behavior is unspecified and may result in an exception. 
Params:
e – the item event
See Also:
ItemEvent
ItemListener
addItemListener
MenuItem.enableEvents
Since:
      1.1/**
     * Processes item events occurring on this check box menu item by
     * dispatching them to any registered {@code ItemListener} objects.
     * <p>
     * This method is not called unless item events are
     * enabled for this menu item. Item events are enabled
     * when one of the following occurs:
     * <ul>
     * <li>An {@code ItemListener} object is registered
     * via {@code addItemListener}.
     * <li>Item events are enabled via {@code enableEvents}.
     * </ul>
     * <p>Note that if the event parameter is {@code null}
     * the behavior is unspecified and may result in an
     * exception.
     *
     * @param       e the item event
     * @see         java.awt.event.ItemEvent
     * @see         java.awt.event.ItemListener
     * @see         #addItemListener
     * @see         java.awt.MenuItem#enableEvents
     * @since       1.1
     */
    protected void processItemEvent(ItemEvent e) {
        ItemListener listener = itemListener;
        if (listener != null) {
            listener.itemStateChanged(e);
        }
    }

    /*
     * Post an ItemEvent and toggle state.
     */
    void doMenuEvent(long when, int modifiers) {
        setState(!state);
        Toolkit.getEventQueue().postEvent(
            new ItemEvent(this, ItemEvent.ITEM_STATE_CHANGED,
                          getLabel(),
                          state ? ItemEvent.SELECTED :
                                  ItemEvent.DESELECTED));
    }

    
Returns a string representing the state of this CheckBoxMenuItem. This method is intended to be used only for debugging purposes, and the content and format of the returned string may vary between implementations. The returned string may be empty but may not be null. 
Returns:
    the parameter string of this check box menu item/**
     * Returns a string representing the state of this
     * {@code CheckBoxMenuItem}. This
     * method is intended to be used only for debugging purposes, and the
     * content and format of the returned string may vary between
     * implementations. The returned string may be empty but may not be
     * {@code null}.
     *
     * @return     the parameter string of this check box menu item
     */
    public String paramString() {
        return super.paramString() + ",state=" + state;
    }

    /* Serialization support.
     */

    /*
     * Serial Data Version
     * @serial
     */
    private int checkboxMenuItemSerializedDataVersion = 1;

    
Writes default serializable fields to stream. Writes a list of serializable ItemListeners as optional data. The non-serializable ItemListeners are detected and no attempt is made to serialize them. 
Params:
s – the ObjectOutputStream to write
See Also:
AWTEventMulticaster.save(ObjectOutputStream, String, EventListener)
Component.itemListenerK
readObject(ObjectInputStream)
@serialData
null terminated sequence of 0 or more pairs; the pair consists of a String and an Object; the String indicates the type of object and is one of the following: itemListenerK indicating an ItemListener object/**
     * Writes default serializable fields to stream.  Writes
     * a list of serializable {@code ItemListeners}
     * as optional data.  The non-serializable
     * {@code ItemListeners} are detected and
     * no attempt is made to serialize them.
     *
     * @param s the {@code ObjectOutputStream} to write
     * @serialData {@code null} terminated sequence of
     *  0 or more pairs; the pair consists of a {@code String}
     *  and an {@code Object}; the {@code String} indicates
     *  the type of object and is one of the following:
     *  {@code itemListenerK} indicating an
     *    {@code ItemListener} object
     *
     * @see AWTEventMulticaster#save(ObjectOutputStream, String, EventListener)
     * @see java.awt.Component#itemListenerK
     * @see #readObject(ObjectInputStream)
     */
    private void writeObject(ObjectOutputStream s)
      throws java.io.IOException
    {
      s.defaultWriteObject();

      AWTEventMulticaster.save(s, itemListenerK, itemListener);
      s.writeObject(null);
    }

    /*
     * Reads the {@code ObjectInputStream} and if it
     * isn't {@code null} adds a listener to receive
     * item events fired by the {@code Checkbox} menu item.
     * Unrecognized keys or values will be ignored.
     *
     * @param s the {@code ObjectInputStream} to read
     * @serial
     * @see removeActionListener()
     * @see addActionListener()
     * @see #writeObject
     */
    private void readObject(ObjectInputStream s)
      throws ClassNotFoundException, IOException
    {
      s.defaultReadObject();

      Object keyOrNull;
      while(null != (keyOrNull = s.readObject())) {
        String key = ((String)keyOrNull).intern();

        if (itemListenerK == key)
          addItemListener((ItemListener)(s.readObject()));

        else // skip value for unrecognized key
          s.readObject();
      }
    }

    
Initialize JNI field and method IDs
/**
     * Initialize JNI field and method IDs
     */
    private static native void initIDs();


/////////////////
// Accessibility support
////////////////

    
Gets the AccessibleContext associated with this CheckboxMenuItem.
For checkbox menu items, the AccessibleContext takes the
form of an AccessibleAWTCheckboxMenuItem.
A new AccessibleAWTCheckboxMenuItem is created if necessary.
Returns:
an AccessibleAWTCheckboxMenuItem that serves as the
        AccessibleContext of this CheckboxMenuItem
Since:
1.3/**
     * Gets the AccessibleContext associated with this CheckboxMenuItem.
     * For checkbox menu items, the AccessibleContext takes the
     * form of an AccessibleAWTCheckboxMenuItem.
     * A new AccessibleAWTCheckboxMenuItem is created if necessary.
     *
     * @return an AccessibleAWTCheckboxMenuItem that serves as the
     *         AccessibleContext of this CheckboxMenuItem
     * @since 1.3
     */
    public AccessibleContext getAccessibleContext() {
        if (accessibleContext == null) {
            accessibleContext = new AccessibleAWTCheckboxMenuItem();
        }
        return accessibleContext;
    }

    
Inner class of CheckboxMenuItem used to provide default support for
accessibility.  This class is not meant to be used directly by
application developers, but is instead meant only to be
subclassed by menu component developers.
 This class implements accessibility support for the CheckboxMenuItem class. It provides an implementation of the Java Accessibility API appropriate to checkbox menu item user-interface elements. 
Since:
1.3/**
     * Inner class of CheckboxMenuItem used to provide default support for
     * accessibility.  This class is not meant to be used directly by
     * application developers, but is instead meant only to be
     * subclassed by menu component developers.
     * <p>
     * This class implements accessibility support for the
     * {@code CheckboxMenuItem} class.  It provides an implementation
     * of the Java Accessibility API appropriate to checkbox menu item
     * user-interface elements.
     * @since 1.3
     */
    protected class AccessibleAWTCheckboxMenuItem extends AccessibleAWTMenuItem
        implements AccessibleAction, AccessibleValue
    {
        /*
         * JDK 1.3 serialVersionUID
         */
        private static final long serialVersionUID = -1122642964303476L;

        
Get the AccessibleAction associated with this object.  In the
implementation of the Java Accessibility API for this class,
return this object, which is responsible for implementing the
AccessibleAction interface on behalf of itself.
Returns:
this object/**
         * Get the AccessibleAction associated with this object.  In the
         * implementation of the Java Accessibility API for this class,
         * return this object, which is responsible for implementing the
         * AccessibleAction interface on behalf of itself.
         *
         * @return this object
         */
        public AccessibleAction getAccessibleAction() {
            return this;
        }

        
Get the AccessibleValue associated with this object.  In the
implementation of the Java Accessibility API for this class,
return this object, which is responsible for implementing the
AccessibleValue interface on behalf of itself.
Returns:
this object/**
         * Get the AccessibleValue associated with this object.  In the
         * implementation of the Java Accessibility API for this class,
         * return this object, which is responsible for implementing the
         * AccessibleValue interface on behalf of itself.
         *
         * @return this object
         */
        public AccessibleValue getAccessibleValue() {
            return this;
        }

        
Returns the number of Actions available in this object.
If there is more than one, the first one is the "default"
action.
Returns:
the number of Actions in this object/**
         * Returns the number of Actions available in this object.
         * If there is more than one, the first one is the "default"
         * action.
         *
         * @return the number of Actions in this object
         */
        public int getAccessibleActionCount() {
            return 0;  //  To be fully implemented in a future release
        }

        
Return a description of the specified action of the object.
Params:
i – zero-based index of the actions/**
         * Return a description of the specified action of the object.
         *
         * @param i zero-based index of the actions
         */
        public String getAccessibleActionDescription(int i) {
            return null;  //  To be fully implemented in a future release
        }

        
Perform the specified Action on the object
Params:
i – zero-based index of actions
Returns:
true if the action was performed; otherwise false./**
         * Perform the specified Action on the object
         *
         * @param i zero-based index of actions
         * @return true if the action was performed; otherwise false.
         */
        public boolean doAccessibleAction(int i) {
            return false;    //  To be fully implemented in a future release
        }

        
Get the value of this object as a Number.  If the value has not been
set, the return value will be null.
See Also:
setCurrentAccessibleValue
Returns:
value of the object/**
         * Get the value of this object as a Number.  If the value has not been
         * set, the return value will be null.
         *
         * @return value of the object
         * @see #setCurrentAccessibleValue
         */
        public Number getCurrentAccessibleValue() {
            return null;  //  To be fully implemented in a future release
        }

        
Set the value of this object as a Number.
See Also:
getCurrentAccessibleValue
Returns:
true if the value was set; otherwise false/**
         * Set the value of this object as a Number.
         *
         * @return true if the value was set; otherwise false
         * @see #getCurrentAccessibleValue
         */
        public boolean setCurrentAccessibleValue(Number n) {
            return false;  //  To be fully implemented in a future release
        }

        
Get the minimum value of this object as a Number.
See Also:
getMaximumAccessibleValue
Returns:
Minimum value of the object; null if this object does not
have a minimum value/**
         * Get the minimum value of this object as a Number.
         *
         * @return Minimum value of the object; null if this object does not
         * have a minimum value
         * @see #getMaximumAccessibleValue
         */
        public Number getMinimumAccessibleValue() {
            return null;  //  To be fully implemented in a future release
        }

        
Get the maximum value of this object as a Number.
See Also:
getMinimumAccessibleValue
Returns:
Maximum value of the object; null if this object does not
have a maximum value/**
         * Get the maximum value of this object as a Number.
         *
         * @return Maximum value of the object; null if this object does not
         * have a maximum value
         * @see #getMinimumAccessibleValue
         */
        public Number getMaximumAccessibleValue() {
            return null;  //  To be fully implemented in a future release
        }

        
Get the role of this object.
Returns:
an instance of AccessibleRole describing the role of the
object/**
         * Get the role of this object.
         *
         * @return an instance of AccessibleRole describing the role of the
         * object
         */
        public AccessibleRole getAccessibleRole() {
            return AccessibleRole.CHECK_BOX;
        }

    } // class AccessibleAWTMenuItem

}