com.esri.arcgis.framework
Class CommandItem

java.lang.Object
  com.esri.arcgis.framework.CommandItem

All Implemented Interfaces:

ICommandItem, com.esri.arcgis.interop.RemoteObjRef, IPersist, IPersistStream, ISupportErrorInfo, Externalizable, Serializable

public class CommandItem
extends Object
implements com.esri.arcgis.interop.RemoteObjRef, ICommandItem, IPersist, IPersistStream, ISupportErrorInfo, Externalizable

Command Item.

Description

A CommandItem class represents any item on a command bar. For example, buttons, tools, and menu items that appear on command bars are all command items. Use the Find method from either ICommandBars or ICommandBar to obtain a reference to a particular CommandItem.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

See Also:

Serialized Form

Constructor Summary

CommandItem(Object obj)
Construct a CommandItem using a reference to such an object returned from ArcGIS Engine or Server.

Method Summary

void	delete() Removes this object from the commandbar.
boolean	equals(Object o) Compare this object with another
void	execute() Causes the command to execute.
String	getAction() The name of the VBA macro this command should run when pressed.
String	getCaption() The caption of this command item.
String	getCategory() The name of the category with which this command item is associated.
void	getClassID(GUID[] pClassID) getClassID
ICommand	getCommand() A reference to the internal command object.
Object	getFaceID() The bitmap that is used as the icon on this command item.
int	getHelpContextID() The help context ID associated with this command item.
String	getHelpFile() The help file associated with this command item.
IUID	getID() The unique integer ID associated with this command item.
int	getIndex() The positional index of this command item within its menu or toolbar.
String	getMessage() The status bar message for this command item.
String	getName() The name of this command item.
ICommandBar	getParent() The menu or toolbar that this command item currently resides on.
void	getSizeMax(_ULARGE_INTEGER[] pcbSize) getSizeMax
int	getStyle() The display style of this command item.
String	getTag() The tag for this command item.
String	getTooltip() The tooltip for this command item.
int	getType() The type of this command item.
int	hashCode() the hashcode for this object
void	interfaceSupportsErrorInfo(GUID riid) interfaceSupportsErrorInfo
boolean	isBuiltIn() Indicates whether this command item is built-in or if it was implemented through VBA.
void	isDirty() isDirty
boolean	isGroup() Indicates if this command item begins a menu or toolbar group.
void	load(IStream pstm) load
void	readExternal(ObjectInput in)
void	refresh() Causes the command to be redrawn.
void	reset() Restores this command item's properties to that of the original.
void	save(IStream pstm, int fClearDirty) save
void	setAction(String macro) The name of the VBA macro this command should run when pressed.
void	setCaption(String name) The caption of this command item.
void	setFaceID(Object faceID) The bitmap that is used as the icon on this command item.
void	setGroup(boolean group) Indicates if this command item begins a menu or toolbar group.
void	setHelpContextID(int contextID) The help context ID associated with this command item.
void	setHelpFile(String helpFile) The help file associated with this command item.
void	setMessage(String message) The status bar message for this command item.
void	setName(String name) The name of this command item.
void	setStyle(int style) The display style of this command item.
void	setTag(String tag) The tag for this command item.
void	setTooltip(String tooltip) The tooltip for this command item.
void	writeExternal(ObjectOutput out)

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.esri.arcgis.interop.RemoteObjRef

getJintegraDispatch, release

Constructor Detail

CommandItem

public CommandItem(Object obj)
            throws IOException

Construct a CommandItem using a reference to such an object returned from ArcGIS Engine or Server. This is semantically equivalent to casting obj to CommandItem.
Casting to this class from the return value of a method will not work, as this class represents an abstract class in ArcObjects.
*
CommandItem o = (CommandItem)obj; // will not work

CommandItem o = new CommandItem(obj); // Use this constructor instead
* @param obj an object returned from ArcGIS Engine or Server

Throws:

IOException - if there are interop problems CommandItem theCommandItem = (CommandItem) obj;

Method Detail

equals

public boolean equals(Object o)

Compare this object with another

Overrides:

equals in class Object

hashCode

public int hashCode()

the hashcode for this object

Overrides:

hashCode in class Object

getAction

public String getAction()
                 throws IOException,
                        AutomationException

The name of the VBA macro this command should run when pressed.

Description

Action is a string representing the full name of the VBA macro that is to be executed when the command item is clicked. The name of the macro must include the name of the VBA project in which this macro is located.

Remarks

Here are some examples of the syntax of the value for the Action property.

Macro called MyMacro in ThisDocument in Normal template:
"Normal.ThisDocument.MyMacro"

Macro called MyMacro in Module1 in Normal template:
"Normal.Module1.MyMacro"

Macro called MyMacro in ThisDocument in the current document:
"Project.ThisDocument.MyMacro"

Macro called MyMacro in Module1 in the current document:
"Project.Module1.MyMacro"

Macro called MyMacro in ThisDocument in a base template:
"TemplateProject.ThisDocument.MyMacro"

Macro called MyMacro in Module1 in a base template:
"TemplateProject.Module1.MyMacro"

Note: This property only applies to macro items.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

getAction in interface ICommandItem

Returns:

The macro

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setAction

public void setAction(String macro)
               throws IOException,
                      AutomationException

The name of the VBA macro this command should run when pressed.

Description

Action is a string representing the full name of the VBA macro that is to be executed when the command item is clicked. The name of the macro must include the name of the VBA project in which this macro is located.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

setAction in interface ICommandItem

Parameters:

macro - The macro (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

isBuiltIn

public boolean isBuiltIn()
                  throws IOException,
                         AutomationException

Indicates whether this command item is built-in or if it was implemented through VBA.

Description

Returns True if the command is a COM command that was created by implementing ICommand and compiling into a DLL. Returns False if the command is a UIControl or a VBA macro.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

isBuiltIn in interface ICommandItem

Returns:

The builtIn

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getCategory

public String getCategory()
                   throws IOException,
                          AutomationException

The name of the category with which this command item is associated.

Description

Category is a string that represents the category of the command on which this command item is based. The category determines where the command will appear in the Commands panel of the Customize dialog.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

getCategory in interface ICommandItem

Returns:

The category

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getCommand

public ICommand getCommand()
                    throws IOException,
                           AutomationException

A reference to the internal command object.

Description

Returns a reference to the command (Button, Tool, ToolControl, or MultiItem) on which this command item is based.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

getCommand in interface ICommandItem

Returns:

A reference to a com.esri.arcgis.systemUI.ICommand

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

See Also:

ICommand

delete

public void delete()
            throws IOException,
                   AutomationException

Removes this object from the commandbar.

Remarks

When you delete a commanditem from a commandbar it is not deleted from the application; it is just removed from the commandbar. You can always add that command back to a commandbar.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

delete in interface ICommandItem

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setFaceID

public void setFaceID(Object faceID)
               throws IOException,
                      AutomationException

The bitmap that is used as the icon on this command item.

Description

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

setFaceID in interface ICommandItem

Parameters:

faceID - A Variant (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getFaceID

public Object getFaceID()
                 throws IOException,
                        AutomationException

The bitmap that is used as the icon on this command item.

Description

The values for FaceID from the built-in icon palette are:

You can also use your own bitmap (.bmp file) with ICommandItem::FaceID. To use your own bitmap, you could create a UserForm in VBA with a Image control on it. Set the Picture property of the Image control to your bitmap.

If you are using your own bitmap, it must be a Bitmap file (.bmp); Icon files (.ico) are not supported. Bitmap files should be 16 X 16 pixels. The color of the upper left pixel of the bitmap is treated as the transparent color. For example, if the upper left pixel of the bitmap is red, then all of the red pixels in the bitmap will be converted to transparent.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

getFaceID in interface ICommandItem

Returns:

A Variant

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setGroup

public void setGroup(boolean group)
              throws IOException,
                     AutomationException

Indicates if this command item begins a menu or toolbar group.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

setGroup in interface ICommandItem

Parameters:

group - The group (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

isGroup

public boolean isGroup()
                throws IOException,
                       AutomationException

Indicates if this command item begins a menu or toolbar group.

Description

If Group is set to True, the command item is the first item in a group on a toolbar or menu. There will be a separator bar to the left of the command item. If Group is set to False, the command item does not have a separator bar to the left of it.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

isGroup in interface ICommandItem

Returns:

The group

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getHelpFile

public String getHelpFile()
                   throws IOException,
                          AutomationException

The help file associated with this command item.

Remarks

You cannot set HelpFile for built-in commands. It is not implemented for macro items and UIControls.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

getHelpFile in interface ICommandItem

Returns:

The helpFile

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setHelpFile

public void setHelpFile(String helpFile)
                 throws IOException,
                        AutomationException

The help file associated with this command item.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

setHelpFile in interface ICommandItem

Parameters:

helpFile - The helpFile (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getHelpContextID

public int getHelpContextID()
                     throws IOException,
                            AutomationException

The help context ID associated with this command item.

Remarks

You cannot set HelpContextID for built-in commands. It is not implemented for macro items and UIControls.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

getHelpContextID in interface ICommandItem

Returns:

The contextID

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setHelpContextID

public void setHelpContextID(int contextID)
                      throws IOException,
                             AutomationException

The help context ID associated with this command item.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

setHelpContextID in interface ICommandItem

Parameters:

contextID - The contextID (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getID

public IUID getID()
           throws IOException,
                  AutomationException

The unique integer ID associated with this command item.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

getID in interface ICommandItem

Returns:

A reference to a com.esri.arcgis.system.IUID

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

See Also:

IUID

getIndex

public int getIndex()
             throws IOException,
                    AutomationException

The positional index of this command item within its menu or toolbar.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

getIndex in interface ICommandItem

Returns:

The index

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getName

public String getName()
               throws IOException,
                      AutomationException

The name of this command item.

Description

Returns the programmatic identifying name string for the command on which this command item is based. Note, this is usually different from the Caption property of a the command.

Remarks

You can modify Name for VBA macro items but not built-in commands and UIControls. Setting this property for a built-in command or UIControls will return "This method cannot be called on built in commands" run-time error.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

getName in interface ICommandItem

Returns:

The name

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setName

public void setName(String name)
             throws IOException,
                    AutomationException

The name of this command item.

Description

Returns the programmatic identifying name string for the command on which this command item is based. Note, this is usually different from the Caption property of a the command.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

setName in interface ICommandItem

Parameters:

name - The name (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setCaption

public void setCaption(String name)
                throws IOException,
                       AutomationException

The caption of this command item.

Description

The Caption property of a command item is a string that appears when the command item is placed on a menu or when the command item's display style property is set to Text Only or Image and Text.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

setCaption in interface ICommandItem

Parameters:

name - The name (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getCaption

public String getCaption()
                  throws IOException,
                         AutomationException

The caption of this command item.

Description

The Caption property of a command item is a string that appears when the command item is placed on a menu or when the command item's display style property is set to Text Only or Image and Text.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

getCaption in interface ICommandItem

Returns:

The name

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getParent

public ICommandBar getParent()
                      throws IOException,
                             AutomationException

The menu or toolbar that this command item currently resides on.

Description

Returns a reference to the CommandBar that this command item is on.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

getParent in interface ICommandItem

Returns:

A reference to a com.esri.arcgis.framework.ICommandBar

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

See Also:

ICommandBar

reset

public void reset()
           throws IOException,
                  AutomationException

Restores this command item's properties to that of the original.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

reset in interface ICommandItem

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getStyle

public int getStyle()
             throws IOException,
                    AutomationException

The display style of this command item.

Description

The Style of a command item determines whether the command item is displayed on a command bar using its caption, image or both. Refer to the esriCommandStyles constants topic for the values for Style.

When a command is put on a toolbar, the command is displayed with the bitmap only by default; the display type is set to Image Only (Style = esriCommandStyleIconOnly).

When a command is put on a menu, the command is displayed with the bitmap and caption by default; the display type is set to Image and Text (Style = esriCommandStyleIconAndText).

However, if the Bitmap property (ICommand::Bitmap) is not set for this command, then the command will be displayed with the caption only by default when it is put on a toolbar or menu; the display type is set to Text Only (Style = esriCommandStyleTextOnly).

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

getStyle in interface ICommandItem

Returns:

A com.esri.arcgis.systemUI.esriCommandStyles constant

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

See Also:

esriCommandStyles

setStyle

public void setStyle(int style)
              throws IOException,
                     AutomationException

The display style of this command item.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

setStyle in interface ICommandItem

Parameters:

style - A com.esri.arcgis.systemUI.esriCommandStyles constant (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

See Also:

esriCommandStyles

getTag

public String getTag()
              throws IOException,
                     AutomationException

The tag for this command item.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

getTag in interface ICommandItem

Returns:

The tag

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setTag

public void setTag(String tag)
            throws IOException,
                   AutomationException

The tag for this command item.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

setTag in interface ICommandItem

Parameters:

tag - The tag (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getTooltip

public String getTooltip()
                  throws IOException,
                         AutomationException

The tooltip for this command item.

Description

Tooltip is a string that appears in the screen tip when the mouse hovers over the command item.

Remarks

You can modify Tooltip for VBA macro items but not built-in commands and UIControls. Setting this property for a built-in command or UIControls will return "This method cannot be called on built in commands" run-time error.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

getTooltip in interface ICommandItem

Returns:

The tooltip

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setTooltip

public void setTooltip(String tooltip)
                throws IOException,
                       AutomationException

The tooltip for this command item.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

setTooltip in interface ICommandItem

Parameters:

tooltip - The tooltip (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getType

public int getType()
            throws IOException,
                   AutomationException

The type of this command item.

Description

Returns the type of this command item using the esriCommandTypes constants. The command item can be one of the following types:

• built-in command
• menu
• toolbar
• macro item
• UIButtonControl
• UIToolControl
• UIComboboxControl
• UIEditboxControl

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

getType in interface ICommandItem

Returns:

A com.esri.arcgis.framework.esriCommandTypes constant

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

See Also:

esriCommandTypes

getMessage

public String getMessage()
                  throws IOException,
                         AutomationException

The status bar message for this command item.

Description

Message is a string that appears as the message in the statusbar of the application when the mouse passes over the command item.

Remarks

You can modify Message for VBA macro items but not built-in commands and UIControls. Setting this property for a built-in command or UIControls will return "This method cannot be called on built in commands" run-time error.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

getMessage in interface ICommandItem

Returns:

The message

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setMessage

public void setMessage(String message)
                throws IOException,
                       AutomationException

The status bar message for this command item.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

setMessage in interface ICommandItem

Parameters:

message - The message (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

execute

public void execute()
             throws IOException,
                    AutomationException

Causes the command to execute.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

execute in interface ICommandItem

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

refresh

public void refresh()
             throws IOException,
                    AutomationException

Causes the command to be redrawn.

Description

Causes the command item to be redrawn on the CommandBar in order to correctly display any new property changes.

It is generally unnecessary to explicitly call Refresh; CommandItem updates such as setting the caption, image, and style all automatically call Refresh.

Product Availability

Available with ArcGIS Desktop.

Supported Platforms

Windows

Specified by:

refresh in interface ICommandItem

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getClassID

public void getClassID(GUID[] pClassID)
                throws IOException,
                       AutomationException

getClassID

Description

IPersist is a Microsoft interface. Please refer to MSDN for information about this interface.

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.

Supported Platforms

Windows, Solaris, Linux

Specified by:

getClassID in interface IPersist

Parameters:

pClassID - A Structure: com.esri.arcgis.support.ms.stdole.GUID (out: use single element array)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

isDirty

public void isDirty()
             throws IOException,
                    AutomationException

isDirty

Description

IPersistStream is a Microsoft interface. Please refer to MSDN for information about this interface.

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.

Supported Platforms

Windows, Solaris, Linux

Specified by:

isDirty in interface IPersistStream

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

load

public void load(IStream pstm)
          throws IOException,
                 AutomationException

load

Description

IPersistStream is a Microsoft interface. Please refer to MSDN for information about this interface.

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.

Supported Platforms

Windows, Solaris, Linux

Specified by:

load in interface IPersistStream

Parameters:

pstm - A reference to a com.esri.arcgis.system.IStream (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

save

public void save(IStream pstm,
                 int fClearDirty)
          throws IOException,
                 AutomationException

save

Description

IPersistStream is a Microsoft interface. Please refer to MSDN for information about this interface.

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.

Supported Platforms

Windows, Solaris, Linux

Specified by:

save in interface IPersistStream

Parameters:

pstm - A reference to a com.esri.arcgis.system.IStream (in)

fClearDirty - The fClearDirty (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getSizeMax

public void getSizeMax(_ULARGE_INTEGER[] pcbSize)
                throws IOException,
                       AutomationException

getSizeMax

Description

IPersistStream is a Microsoft interface. Please refer to MSDN for information about this interface.

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.

Supported Platforms

Windows, Solaris, Linux

Specified by:

getSizeMax in interface IPersistStream

Parameters:

pcbSize - A Structure: com.esri.arcgis.system._ULARGE_INTEGER (out: use single element array)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

interfaceSupportsErrorInfo

public void interfaceSupportsErrorInfo(GUID riid)
                                throws IOException,
                                       AutomationException

interfaceSupportsErrorInfo

Description

Indicates whether the interface supports IErrorInfo.

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.

Supported Platforms

Windows, Solaris, Linux

Specified by:

interfaceSupportsErrorInfo in interface ISupportErrorInfo

Parameters:

riid - A Structure: com.esri.arcgis.support.ms.stdole.GUID (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Throws:

IOException

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
                         ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Throws:

IOException

ClassNotFoundException