com.vaadin.ui
Class Window

java.lang.Object
  com.vaadin.server.AbstractClientConnector
      com.vaadin.ui.AbstractComponent
          com.vaadin.ui.AbstractSingleComponentContainer
              com.vaadin.ui.Panel
                  com.vaadin.ui.Window

All Implemented Interfaces:

Action.Container, Action.Notifier, ConnectorEventListener, FieldEvents.BlurNotifier, FieldEvents.FocusNotifier, MethodEventSource, ClientConnector, Scrollable, Sizeable, VariableOwner, com.vaadin.shared.Connector, Component, Component.Focusable, HasComponents, HasComponents.ComponentAttachDetachNotifier, LegacyComponent, SingleComponentContainer, java.io.Serializable, java.lang.Iterable<Component>, java.util.EventListener

Direct Known Subclasses:

ColorPickerPopup

public class Window
extends Panel
implements FieldEvents.FocusNotifier, FieldEvents.BlurNotifier, LegacyComponent

A component that represents a floating popup window that can be added to a UI. A window is added to a UI using UI.addWindow(Window).

The contents of a window is set using AbstractSingleComponentContainer.setContent(Component) or by using the Window(String, Component) constructor.

A window can be positioned on the screen using absolute coordinates (pixels) or set to be centered using center()

The caption is displayed in the window header.

In Vaadin versions prior to 7.0.0, Window was also used as application level windows. This function is now covered by the UI class.

Since:

3.0

Author:

Vaadin Ltd.

See Also:

Serialized Form

Nested Class Summary

static class	Window.CloseEvent
static interface	Window.CloseListener An interface used for listening to Window close events.
static class	Window.CloseShortcut A ShortcutListener specifically made to define a keyboard shortcut that closes the window.
static class	Window.ResizeEvent Resize events are fired whenever the client-side fires a resize-event (e.g.
static interface	Window.ResizeListener Listener for window resize events.
static class	Window.WindowModeChangeEvent Event which is fired when the mode of the Window changes.
static interface	Window.WindowModeChangeListener An interface used for listening to Window maximize / restore events.

Nested classes/interfaces inherited from interface com.vaadin.ui.Component

Component.ErrorEvent, Component.Event, Component.Focusable, Component.Listener

Nested classes/interfaces inherited from interface com.vaadin.server.ClientConnector

ClientConnector.AttachEvent, ClientConnector.AttachListener, ClientConnector.ConnectorErrorEvent, ClientConnector.DetachEvent, ClientConnector.DetachListener

Nested classes/interfaces inherited from interface com.vaadin.server.Sizeable

Sizeable.Unit

Nested classes/interfaces inherited from interface com.vaadin.ui.HasComponents

HasComponents.ComponentAttachDetachNotifier, HasComponents.ComponentAttachEvent, HasComponents.ComponentAttachListener, HasComponents.ComponentDetachEvent, HasComponents.ComponentDetachListener

Field Summary

protected Window.CloseShortcut

closeShortcut

Fields inherited from class com.vaadin.ui.Panel

actionManager

Fields inherited from interface com.vaadin.server.Sizeable

SIZE_UNDEFINED, UNITS_CM, UNITS_EM, UNITS_EX, UNITS_INCH, UNITS_MM, UNITS_PERCENTAGE, UNITS_PICAS, UNITS_PIXELS, UNITS_POINTS

Constructor Summary

Window()
Creates a new, empty sub window

Window(java.lang.String caption)
Creates a new, empty sub window with a given title.

Window(java.lang.String caption, Component content)
Creates a new, empty sub window with the given content and title.

Method Summary

void	addBlurListener(FieldEvents.BlurListener listener) Note, that focus/blur listeners in Window class are only supported by sub windows.
void	addCloseListener(Window.CloseListener listener) Adds a CloseListener to the window.
void	addFocusListener(FieldEvents.FocusListener listener) Note, that focus/blur listeners in Window class are only supported by sub windows.
void	addListener(FieldEvents.BlurListener listener) Deprecated. As of 7.0, replaced by #addBlurListener(BlurListener)
void	addListener(FieldEvents.FocusListener listener) Deprecated. As of 7.0, replaced by #addFocusListener(FocusListener)
void	addListener(Window.CloseListener listener) Deprecated. As of 7.0, replaced by addCloseListener(CloseListener)
void	addListener(Window.ResizeListener listener) Deprecated. As of 7.0, replaced by addResizeListener(ResizeListener)
void	addResizeListener(Window.ResizeListener listener) Add a resize listener.
void	addWindowModeChangeListener(Window.WindowModeChangeListener listener) Adds a WindowModeChangeListener to the window.
void	bringToFront() If there are currently several windows visible, calling this method makes this window topmost.
void	center() Sets this window to be centered relative to its parent window.
void	changeVariables(java.lang.Object source, java.util.Map<java.lang.String,java.lang.Object> variables) Called when one or more variables handled by the implementing class are changed.
void	close() Method that handles window closing (from UI).
protected void	fireClose()
protected void	fireResize() Fire the resize event.
protected void	fireWindowWindowModeChange()
void	focus() Moves keyboard focus to the component.
int	getPositionX() Gets the distance of Window left border in pixels from left border of the containing (main window) when the window is in WindowMode.NORMAL.
int	getPositionY() Gets the distance of Window top border in pixels from top border of the containing (main window) when the window is in WindowMode.NORMAL state, or when next set to that state.
protected com.vaadin.shared.ui.window.WindowState	getState() Returns the shared state bean with information to be sent from the server to the client.
protected com.vaadin.shared.ui.window.WindowState	getState(boolean markAsDirty) Returns the shared state for this connector.
com.vaadin.shared.ui.window.WindowMode	getWindowMode() Gets the current mode of the window.
boolean	isClosable() Returns the closable status of the sub window.
boolean	isDraggable() Indicates whether a sub window can be dragged or not.
boolean	isModal()
boolean	isResizable()
boolean	isResizeLazy()
void	paintContent(PaintTarget target) Paints the Paintable into a UIDL stream.
void	removeBlurListener(FieldEvents.BlurListener listener) Removes a BlurListener from the Component.
void	removeCloseListener(Window.CloseListener listener) Removes the CloseListener from the window.
void	removeCloseShortcut() Removes the keyboard shortcut previously set with setCloseShortcut(int, int...).
void	removeFocusListener(FieldEvents.FocusListener listener) Removes a FocusListener from the Component.
void	removeListener(FieldEvents.BlurListener listener) Deprecated. As of 7.0, replaced by #removeBlurListener(BlurListener)
void	removeListener(FieldEvents.FocusListener listener) Deprecated. As of 7.0, replaced by #removeFocusListener(FocusListener)
void	removeListener(Window.CloseListener listener) Deprecated. As of 7.0, replaced by removeCloseListener(CloseListener)
void	removeListener(Window.ResizeListener listener) Deprecated. As of 7.0, replaced by removeResizeListener(ResizeListener)
void	removeResizeListener(Window.ResizeListener listener) Remove a resize listener.
void	removeWindowModeChangeListener(Window.WindowModeChangeListener listener) Removes the WindowModeChangeListener from the window.
void	setClosable(boolean closable) Sets the closable status for the sub window.
void	setCloseShortcut(int keyCode, int... modifiers) Makes is possible to close the window by pressing the given ShortcutAction.KeyCode and (optional) ShortcutAction.ModifierKeys. Note that this shortcut only reacts while the window has focus, closing itself - if you want to close a subwindow from a parent window, use Panel.addAction(com.vaadin.event.Action) of the parent window instead.
void	setDraggable(boolean draggable) Enables or disables that a sub window can be dragged (moved) by the user.
void	setModal(boolean modal) Sets sub-window modal, so that widgets behind it cannot be accessed.
void	setParent(HasComponents parent) Sets the parent connector of the component.
void	setPositionX(int positionX) Sets the distance of Window left border in pixels from left border of the containing (main window).
void	setPositionY(int positionY) Sets the distance of Window top border in pixels from top border of the containing (main window).
void	setResizable(boolean resizable) Sets sub-window resizable.
void	setResizeLazy(boolean resizeLazy) Should resize operations be lazy, i.e.
void	setWindowMode(com.vaadin.shared.ui.window.WindowMode windowMode) Sets the mode for the window

Methods inherited from class com.vaadin.ui.Panel

addAction, addActionHandler, addClickListener, addListener, getActionManager, getScrollLeft, getScrollTop, getTabIndex, removeAction, removeActionHandler, removeAllActionHandlers, removeClickListener, removeListener, setCaption, setScrollLeft, setScrollTop, setTabIndex

Methods inherited from class com.vaadin.ui.AbstractSingleComponentContainer

addComponentAttachListener, addComponentDetachListener, fireComponentAttachEvent, fireComponentDetachEvent, getComponentCount, getContent, iterator, removeComponentAttachListener, removeComponentDetachListener, removeFromParent, setContent, setHeight, setWidth

Methods inherited from class com.vaadin.ui.AbstractComponent

addListener, addShortcutListener, addStyleName, attach, beforeClientResponse, detach, findAncestor, fireComponentErrorEvent, fireComponentEvent, getCaption, getComponentError, getData, getDebugId, getDescription, getErrorMessage, getHeight, getHeightUnits, getIcon, getId, getLocale, getParent, getPrimaryStyleName, getStyleName, getWidth, getWidthUnits, isConnectorEnabled, isEnabled, isImmediate, isReadOnly, isVisible, removeListener, removeShortcutListener, removeStyleName, setComponentError, setData, setDebugId, setDescription, setEnabled, setHeight, setIcon, setId, setImmediate, setLocale, setPrimaryStyleName, setReadOnly, setSizeFull, setSizeUndefined, setStyleName, setVisible, setWidth

Methods inherited from class com.vaadin.server.AbstractClientConnector

addAttachListener, addDetachListener, addExtension, addListener, addListener, addListener, addMethodInvocationToQueue, createState, encodeState, fireEvent, getAllChildrenIterable, getConnectorId, getErrorHandler, getExtensions, getListeners, getResource, getRpcManager, getRpcProxy, getSession, getStateType, getUI, handleConnectorRequest, hasListeners, isAttached, markAsDirty, markAsDirtyRecursive, registerRpc, registerRpc, removeAttachListener, removeDetachListener, removeExtension, removeListener, removeListener, removeListener, removeListener, requestRepaint, requestRepaintAll, retrievePendingRpcCalls, setErrorHandler, setResource

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.vaadin.ui.LegacyComponent

markAsDirty

Methods inherited from interface com.vaadin.server.VariableOwner

isEnabled, isImmediate

Methods inherited from interface com.vaadin.ui.Component

addListener, addStyleName, attach, getCaption, getDescription, getIcon, getId, getLocale, getParent, getPrimaryStyleName, getStyleName, getUI, isEnabled, isReadOnly, isVisible, removeListener, removeStyleName, setCaption, setEnabled, setIcon, setId, setPrimaryStyleName, setReadOnly, setStyleName, setVisible

Methods inherited from interface com.vaadin.server.ClientConnector

addAttachListener, addDetachListener, beforeClientResponse, detach, encodeState, getErrorHandler, getExtensions, getRpcManager, getStateType, handleConnectorRequest, isAttached, isConnectorEnabled, markAsDirtyRecursive, removeAttachListener, removeDetachListener, removeExtension, requestRepaint, requestRepaintAll, retrievePendingRpcCalls, setErrorHandler

Methods inherited from interface com.vaadin.shared.Connector

getConnectorId

Methods inherited from interface com.vaadin.server.Sizeable

getHeight, getHeightUnits, getWidth, getWidthUnits, setHeight, setHeight, setSizeFull, setSizeUndefined, setWidth, setWidth

Field Detail

closeShortcut

protected Window.CloseShortcut closeShortcut

Constructor Detail

Window

public Window()

Creates a new, empty sub window

Window

public Window(java.lang.String caption)

Creates a new, empty sub window with a given title.

Parameters:

caption - the title of the window.

Window

public Window(java.lang.String caption,
              Component content)

Creates a new, empty sub window with the given content and title.

Parameters:

caption - the title of the window.

content - the contents of the window

Method Detail

paintContent

public void paintContent(PaintTarget target)
                  throws PaintException

Description copied from interface: LegacyComponent

Paints the Paintable into a UIDL stream. This method creates the UIDL sequence describing it and outputs it to the given UIDL stream.

It is called when the contents of the component should be painted in response to the component first being shown or having been altered so that its visual representation is changed.

Specified by:

paintContent in interface LegacyComponent

Overrides:

paintContent in class Panel

Parameters:

target - the target UIDL stream where the component should paint itself to.

Throws:

PaintException - if the paint operation failed.

setParent

public void setParent(HasComponents parent)

Description copied from interface: Component

Sets the parent connector of the component.

This method automatically calls Component.attach() if the component becomes attached to the session, regardless of whether it was attached previously. Conversely, if the component currently is attached to the session, ClientConnector.detach() is called for the connector before attaching it to a new parent.

This method is rarely called directly. ComponentContainer.addComponent(Component) or a HasComponents specific method is normally used for adding components to a parent and the used method will call this method implicitly.

Specified by:

setParent in interface Component

Overrides:

setParent in class AbstractComponent

Parameters:

parent - the parent connector

changeVariables

public void changeVariables(java.lang.Object source,
                            java.util.Map<java.lang.String,java.lang.Object> variables)

Description copied from class: Panel

Called when one or more variables handled by the implementing class are changed.

Specified by:

changeVariables in interface VariableOwner

Overrides:

changeVariables in class Panel

Parameters:

source - the Source of the variable change. This is the origin of the event. For example in Web Adapter this is the request.

variables - the Mapping from variable names to new variable values.

See Also:

VariableOwner.changeVariables(Object, Map)

close

public void close()

Method that handles window closing (from UI).

By default, sub-windows are removed from their respective parent windows and thus visually closed on browser-side. Browser-level windows also closed on the client-side, but they are not implicitly removed from the application.

To explicitly close a sub-window, use #removeWindow(Window). To react to a window being closed (after it is closed), register a Window.CloseListener.

getPositionX

public int getPositionX()

Gets the distance of Window left border in pixels from left border of the containing (main window) when the window is in WindowMode.NORMAL.

Returns:

the Distance of Window left border in pixels from left border of the containing (main window).or -1 if unspecified

Since:

4.0.0

setPositionX

public void setPositionX(int positionX)

Sets the distance of Window left border in pixels from left border of the containing (main window). Has effect only if in WindowMode.NORMAL mode.

Parameters:

positionX - the Distance of Window left border in pixels from left border of the containing (main window). or -1 if unspecified.

Since:

4.0.0

getPositionY

public int getPositionY()

Gets the distance of Window top border in pixels from top border of the containing (main window) when the window is in WindowMode.NORMAL state, or when next set to that state.

Returns:

Distance of Window top border in pixels from top border of the containing (main window). or -1 if unspecified

Since:

4.0.0

setPositionY

public void setPositionY(int positionY)

Sets the distance of Window top border in pixels from top border of the containing (main window). Has effect only if in WindowMode.NORMAL mode.

Parameters:

positionY - the Distance of Window top border in pixels from top border of the containing (main window). or -1 if unspecified

Since:

4.0.0

addCloseListener

public void addCloseListener(Window.CloseListener listener)

Adds a CloseListener to the window. For a sub window the CloseListener is fired when the user closes it (clicks on the close button). For a browser level window the CloseListener is fired when the browser level window is closed. Note that closing a browser level window does not mean it will be destroyed. Also note that Opera does not send events like all other browsers and therefore the close listener might not be called if Opera is used.

Since Vaadin 6.5, removing windows using #removeWindow(Window) does fire the CloseListener.

Parameters:

listener - the CloseListener to add.

addListener

@Deprecated
public void addListener(Window.CloseListener listener)

Deprecated. As of 7.0, replaced by addCloseListener(CloseListener)

removeCloseListener

public void removeCloseListener(Window.CloseListener listener)

Removes the CloseListener from the window.

For more information on CloseListeners see Window.CloseListener.

Parameters:

listener - the CloseListener to remove.

removeListener

@Deprecated
public void removeListener(Window.CloseListener listener)

Deprecated. As of 7.0, replaced by removeCloseListener(CloseListener)

fireClose

protected void fireClose()

addWindowModeChangeListener

public void addWindowModeChangeListener(Window.WindowModeChangeListener listener)

Adds a WindowModeChangeListener to the window. The WindowModeChangeEvent is fired when the user changed the display state by clicking the maximize/restore button or by double clicking on the window header. The event is also fired if the state is changed using setWindowMode(WindowMode).

Parameters:

listener - the WindowModeChangeListener to add.

removeWindowModeChangeListener

public void removeWindowModeChangeListener(Window.WindowModeChangeListener listener)

Removes the WindowModeChangeListener from the window.

Parameters:

listener - the WindowModeChangeListener to remove.

fireWindowWindowModeChange

protected void fireWindowWindowModeChange()

addResizeListener

public void addResizeListener(Window.ResizeListener listener)

Add a resize listener.

Parameters:

listener -

addListener

@Deprecated
public void addListener(Window.ResizeListener listener)

Deprecated. As of 7.0, replaced by addResizeListener(ResizeListener)

removeResizeListener

public void removeResizeListener(Window.ResizeListener listener)

Remove a resize listener.

Parameters:

listener -

removeListener

@Deprecated
public void removeListener(Window.ResizeListener listener)

Deprecated. As of 7.0, replaced by removeResizeListener(ResizeListener)

fireResize

protected void fireResize()

Fire the resize event.

bringToFront

public void bringToFront()

If there are currently several windows visible, calling this method makes this window topmost.

This method can only be called if this window connected a UI. Else an illegal state exception is thrown. Also if there are modal windows and this window is not modal, and illegal state exception is thrown.

setModal

public void setModal(boolean modal)

Sets sub-window modal, so that widgets behind it cannot be accessed. Note: affects sub-windows only.

Parameters:

modal - true if modality is to be turned on

isModal

public boolean isModal()

Returns:

true if this window is modal.

setResizable

public void setResizable(boolean resizable)

Sets sub-window resizable. Note: affects sub-windows only.

Parameters:

resizable - true if resizability is to be turned on

isResizable

public boolean isResizable()

Returns:

true if window is resizable by the end-user, otherwise false.

isResizeLazy

public boolean isResizeLazy()

Returns:

true if a delay is used before recalculating sizes, false if sizes are recalculated immediately.

setResizeLazy

public void setResizeLazy(boolean resizeLazy)

Should resize operations be lazy, i.e. should there be a delay before layout sizes are recalculated. Speeds up resize operations in slow UIs with the penalty of slightly decreased usability. Note, some browser send false resize events for the browser window and are therefore always lazy.

Parameters:

resizeLazy - true to use a delay before recalculating sizes, false to calculate immediately.

center

public void center()

Sets this window to be centered relative to its parent window. Affects sub-windows only. If the window is resized as a result of the size of its content changing, it will keep itself centered as long as its position is not explicitly changed programmatically or by the user.

NOTE: This method has several issues as currently implemented. Please refer to http://dev.vaadin.com/ticket/8971 for details.

isClosable

public boolean isClosable()

Returns the closable status of the sub window. If a sub window is closable it typically shows an X in the upper right corner. Clicking on the X sends a close event to the server. Setting closable to false will remove the X from the sub window and prevent the user from closing the window. Note! For historical reasons readonly controls the closability of the sub window and therefore readonly and closable affect each other. Setting readonly to true will set closable to false and vice versa.

Closable only applies to sub windows, not to browser level windows.

Returns:

true if the sub window can be closed by the user.

setClosable

public void setClosable(boolean closable)

Sets the closable status for the sub window. If a sub window is closable it typically shows an X in the upper right corner. Clicking on the X sends a close event to the server. Setting closable to false will remove the X from the sub window and prevent the user from closing the window. Note! For historical reasons readonly controls the closability of the sub window and therefore readonly and closable affect each other. Setting readonly to true will set closable to false and vice versa.

Closable only applies to sub windows, not to browser level windows.

Parameters:

closable - determines if the sub window can be closed by the user.

isDraggable

public boolean isDraggable()

Indicates whether a sub window can be dragged or not. By default a sub window is draggable.

Draggable only applies to sub windows, not to browser level windows.

Parameters:

draggable - true if the sub window can be dragged by the user

setDraggable

public void setDraggable(boolean draggable)

Enables or disables that a sub window can be dragged (moved) by the user. By default a sub window is draggable.

Draggable only applies to sub windows, not to browser level windows.

Parameters:

draggable - true if the sub window can be dragged by the user

getWindowMode

public com.vaadin.shared.ui.window.WindowMode getWindowMode()

Gets the current mode of the window.

Returns:

the mode of the window.

See Also:

WindowMode

setWindowMode

public void setWindowMode(com.vaadin.shared.ui.window.WindowMode windowMode)

Sets the mode for the window

Parameters:

windowMode - The new mode

See Also:

WindowMode

setCloseShortcut

public void setCloseShortcut(int keyCode,
                             int... modifiers)

Makes is possible to close the window by pressing the given ShortcutAction.KeyCode and (optional) ShortcutAction.ModifierKeys.
Note that this shortcut only reacts while the window has focus, closing itself - if you want to close a subwindow from a parent window, use Panel.addAction(com.vaadin.event.Action) of the parent window instead.

Parameters:

keyCode - the keycode for invoking the shortcut

modifiers - the (optional) modifiers for invoking the shortcut, null for none

removeCloseShortcut

public void removeCloseShortcut()

Removes the keyboard shortcut previously set with setCloseShortcut(int, int...).

addFocusListener

public void addFocusListener(FieldEvents.FocusListener listener)

Note, that focus/blur listeners in Window class are only supported by sub windows. Also note that Window is not considered focused if its contained component currently has focus.

Specified by:

addFocusListener in interface FieldEvents.FocusNotifier

See Also:

FieldEvents.FocusNotifier.addListener(com.vaadin.event.FieldEvents.FocusListener)

addListener

@Deprecated
public void addListener(FieldEvents.FocusListener listener)

Deprecated. As of 7.0, replaced by #addFocusListener(FocusListener)

Specified by:

addListener in interface FieldEvents.FocusNotifier

removeFocusListener

public void removeFocusListener(FieldEvents.FocusListener listener)

Description copied from interface: FieldEvents.FocusNotifier

Removes a FocusListener from the Component.

Specified by:

removeFocusListener in interface FieldEvents.FocusNotifier

See Also:

FieldEvents.FocusListener

removeListener

@Deprecated
public void removeListener(FieldEvents.FocusListener listener)

Deprecated. As of 7.0, replaced by #removeFocusListener(FocusListener)

Specified by:

removeListener in interface FieldEvents.FocusNotifier

addBlurListener

public void addBlurListener(FieldEvents.BlurListener listener)

Note, that focus/blur listeners in Window class are only supported by sub windows. Also note that Window is not considered focused if its contained component currently has focus.

Specified by:

addBlurListener in interface FieldEvents.BlurNotifier

See Also:

FieldEvents.BlurNotifier.addListener(com.vaadin.event.FieldEvents.BlurListener)

addListener

@Deprecated
public void addListener(FieldEvents.BlurListener listener)

Deprecated. As of 7.0, replaced by #addBlurListener(BlurListener)

Specified by:

addListener in interface FieldEvents.BlurNotifier

removeBlurListener

public void removeBlurListener(FieldEvents.BlurListener listener)

Description copied from interface: FieldEvents.BlurNotifier

Removes a BlurListener from the Component.

Specified by:

removeBlurListener in interface FieldEvents.BlurNotifier

See Also:

FieldEvents.BlurListener

removeListener

@Deprecated
public void removeListener(FieldEvents.BlurListener listener)

Deprecated. As of 7.0, replaced by #removeBlurListener(BlurListener)

Specified by:

removeListener in interface FieldEvents.BlurNotifier

focus

public void focus()

Moves keyboard focus to the component. Component.Focusable.focus() If the window is a sub-window focusing will cause the sub-window to be brought on top of other sub-windows on gain keyboard focus.

Specified by:

focus in interface Component.Focusable

Overrides:

focus in class Panel

See Also:

FieldEvents, FieldEvents.FocusEvent, FieldEvents.FocusListener, FieldEvents.BlurEvent, FieldEvents.BlurListener

getState

protected com.vaadin.shared.ui.window.WindowState getState()

Description copied from class: AbstractComponent

Returns the shared state bean with information to be sent from the server to the client. Subclasses should override this method and set any relevant fields of the state returned by super.getState().

Overrides:

getState in class Panel

Returns:

updated component shared state

getState

protected com.vaadin.shared.ui.window.WindowState getState(boolean markAsDirty)

Description copied from class: AbstractClientConnector

Returns the shared state for this connector.

Overrides:

getState in class AbstractComponent

Parameters:

markAsDirty - true if the connector should automatically be marked dirty, false otherwise

Returns:

The shared state for this connector. Never null.

See Also:

AbstractClientConnector.getState()