com.esri.arcgis.geodatabase
Class RelationshipClassName

java.lang.Object
  com.esri.arcgis.geodatabase.RelationshipClassName

All Implemented Interfaces:

IDatasetName, IMetadata, IMetadataEdit, INativeTypeInfo, IRelationshipClassName, ISQLPrivilege, com.esri.arcgis.interop.RemoteObjRef, IName, IPersist, IPersistStream, Externalizable, Serializable

public class RelationshipClassName
extends Object
implements com.esri.arcgis.interop.RemoteObjRef, IName, IDatasetName, IRelationshipClassName, IPersist, IPersistStream, IMetadata, IMetadataEdit, INativeTypeInfo, ISQLPrivilege, Externalizable

Esri Relationship Class Name object.

Remarks

A RelationshipClassName identifies and locates a relationship class in a workspace and supports obtaining some key properties of the feature class without having to open (instantiate) it.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

See Also:

Serialized Form

Constructor Summary

RelationshipClassName()
Constructs a RelationshipClassName using ArcGIS Engine.

RelationshipClassName(Object obj)
Deprecated. As of ArcGIS 9.2, replaced by normal Java casts.
RelationshipClassName theRelationshipClassName = (RelationshipClassName) obj;

Method Summary

boolean	equals(Object o) Compare this object with another
int	getCardinality() The Cardinality.
String	getCategory() The category of the dataset.
void	getClassID(GUID[] pClassID) getClassID
static String	getClsid() getClsid.
IDatasetName	getFeatureDatasetName() The Feature Dataset Name object.
IPropertySet	getMetadata() The PropertySet containing metadata.
String	getName() The name of the dataset.
String	getNameString() The name string of the object.
INativeType	getNativeType() The native type.
int	getNotification() The Notification.
void	getSizeMax(_ULARGE_INTEGER[] pcbSize) getSizeMax
int	getSQLPrivileges() The database privileges.
IEnumDatasetName	getSubsetNames() Subset names contained within this dataset name.
int	getType() The type of the dataset.
IWorkspaceName	getWorkspaceName() The WorkspaceName of the DatasetName.
void	grant(String userName, int privileges, boolean withGrant) Grants privileges for the database user.
int	hashCode() the hashcode for this object
boolean	isAttributed() Indicates if Attributed.
boolean	isCanEditMetadata() Indicates if metadata can be edited.
boolean	isComposite() Indicates if Composite.
void	isDirty() isDirty
void	load(IStream pstm) load
Object	open() Opens the object referred to by this name.
void	readExternal(ObjectInput in)
void	revoke(String userName, int privileges) Revokes privileges for the database user.
void	save(IStream pstm, int fClearDirty) save
void	setCardinality(int cardinality) The Cardinality.
void	setCategory(String category) The category of the dataset.
void	setFeatureDatasetNameByRef(IDatasetName featureDatasetName) The Feature Dataset Name object.
void	setIsAttributed(boolean isAttributed) Indicates if Attributed.
void	setIsComposite(boolean isComposite) Indicates if Composite.
void	setMetadata(IPropertySet ppPropertySet) The PropertySet containing metadata.
void	setName(String name) The name of the dataset.
void	setNameString(String nameString) The name string of the object.
void	setNotification(int notification) The Notification.
void	setWorkspaceNameByRef(IWorkspaceName workspaceName) The WorkspaceName of the DatasetName.
void	synchronize(int action, int interval) Updates metadata with the current properties; may create metadata if it doesn't already exist.
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

RelationshipClassName

public RelationshipClassName()
                      throws IOException,
                             UnknownHostException

Constructs a RelationshipClassName using ArcGIS Engine.

Throws:

IOException - if there are interop problems

UnknownHostException - if there are interop problems

RelationshipClassName

public RelationshipClassName(Object obj)
                      throws IOException

Deprecated. As of ArcGIS 9.2, replaced by normal Java casts.
RelationshipClassName theRelationshipClassName = (RelationshipClassName) obj;

Construct a RelationshipClassName using a reference to such an object returned from ArcGIS Engine or Server. This is semantically equivalent to casting obj to RelationshipClassName.

Parameters:

obj - an object returned from ArcGIS Engine or Server

Throws:

IOException - if there are interop problems

Method Detail

getClsid

public static String getClsid()

getClsid.

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

setNameString

public void setNameString(String nameString)
                   throws IOException,
                          AutomationException

The name string of the object.

Remarks

The NameString property is reserved for future use. When implemented, it will return a string representation of the locational component of the name object that may be persisted by applications.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

setNameString in interface IName

Parameters:

nameString - The nameString (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getNameString

public String getNameString()
                     throws IOException,
                            AutomationException

The name string of the object.

Remarks

The NameString property is reserved for future use. When implemented, it will return a string representation of the locational component of the name object that may be persisted by applications.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

getNameString in interface IName

Returns:

The nameString

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

open

public Object open()
            throws IOException,
                   AutomationException

Opens the object referred to by this name.

Remarks

The Open method lets you instantiate the actual object given the name object.

Note: Opening a feature class that participates in a topology or geometric network will also open all other feature classes participating in the topology or geometric network in memory.

Example:

IName   pName = pFeatureClassName; 
pFeatureClass = new IFeatureClassProxy(pName.open());

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

open in interface IName

Returns:

A reference to another Object (IUnknown)

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 the dataset.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

getName in interface IDatasetName

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 the dataset.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

setName in interface IDatasetName

Parameters:

name - The name (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 the dataset.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

getType in interface IDatasetName

Returns:

A com.esri.arcgis.geodatabase.esriDatasetType constant

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getCategory

public String getCategory()
                   throws IOException,
                          AutomationException

The category of the dataset.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

getCategory in interface IDatasetName

Returns:

The category

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setCategory

public void setCategory(String category)
                 throws IOException,
                        AutomationException

The category of the dataset.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

setCategory in interface IDatasetName

Parameters:

category - The category (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getWorkspaceName

public IWorkspaceName getWorkspaceName()
                                throws IOException,
                                       AutomationException

The WorkspaceName of the DatasetName.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

getWorkspaceName in interface IDatasetName

Returns:

A reference to a com.esri.arcgis.geodatabase.IWorkspaceName

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setWorkspaceNameByRef

public void setWorkspaceNameByRef(IWorkspaceName workspaceName)
                           throws IOException,
                                  AutomationException

The WorkspaceName of the DatasetName.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

setWorkspaceNameByRef in interface IDatasetName

Parameters:

workspaceName - A reference to a com.esri.arcgis.geodatabase.IWorkspaceName (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getSubsetNames

public IEnumDatasetName getSubsetNames()
                                throws IOException,
                                       AutomationException

Subset names contained within this dataset name.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

getSubsetNames in interface IDatasetName

Returns:

A reference to a com.esri.arcgis.geodatabase.IEnumDatasetName

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getFeatureDatasetName

public IDatasetName getFeatureDatasetName()
                                   throws IOException,
                                          AutomationException

The Feature Dataset Name object.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

getFeatureDatasetName in interface IRelationshipClassName

Returns:

A reference to a com.esri.arcgis.geodatabase.IDatasetName

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setFeatureDatasetNameByRef

public void setFeatureDatasetNameByRef(IDatasetName featureDatasetName)
                                throws IOException,
                                       AutomationException

The Feature Dataset Name object.

Product Availability

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

Specified by:

setFeatureDatasetNameByRef in interface IRelationshipClassName

Parameters:

featureDatasetName - A reference to a com.esri.arcgis.geodatabase.IDatasetName (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getCardinality

public int getCardinality()
                   throws IOException,
                          AutomationException

The Cardinality.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

getCardinality in interface IRelationshipClassName

Returns:

A com.esri.arcgis.geodatabase.esriRelCardinality constant

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setCardinality

public void setCardinality(int cardinality)
                    throws IOException,
                           AutomationException

The Cardinality.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

setCardinality in interface IRelationshipClassName

Parameters:

cardinality - A com.esri.arcgis.geodatabase.esriRelCardinality constant (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getNotification

public int getNotification()
                    throws IOException,
                           AutomationException

The Notification.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

getNotification in interface IRelationshipClassName

Returns:

A com.esri.arcgis.geodatabase.esriRelNotification constant

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setNotification

public void setNotification(int notification)
                     throws IOException,
                            AutomationException

The Notification.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

setNotification in interface IRelationshipClassName

Parameters:

notification - A com.esri.arcgis.geodatabase.esriRelNotification constant (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

isComposite

public boolean isComposite()
                    throws IOException,
                           AutomationException

Indicates if Composite.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

isComposite in interface IRelationshipClassName

Returns:

The isComposite

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setIsComposite

public void setIsComposite(boolean isComposite)
                    throws IOException,
                           AutomationException

Indicates if Composite.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

setIsComposite in interface IRelationshipClassName

Parameters:

isComposite - The isComposite (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

isAttributed

public boolean isAttributed()
                     throws IOException,
                            AutomationException

Indicates if Attributed.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

isAttributed in interface IRelationshipClassName

Returns:

The isAttributed

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setIsAttributed

public void setIsAttributed(boolean isAttributed)
                     throws IOException,
                            AutomationException

Indicates if Attributed.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

setIsAttributed in interface IRelationshipClassName

Parameters:

isAttributed - The isAttributed (in)

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.

getMetadata

public IPropertySet getMetadata()
                         throws IOException,
                                AutomationException

The PropertySet containing metadata.

Remarks

The variable to hold the data must be of IPropertySet data type.

The metadata property is frequently used to save, or update, changes to metadata documents that have taken place through methods available on the IPropertySet, IXmlPropertySet, and/or IXmlPropertySet2 interfaces.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

getMetadata in interface IMetadata

Returns:

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

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setMetadata

public void setMetadata(IPropertySet ppPropertySet)
                 throws IOException,
                        AutomationException

The PropertySet containing metadata.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

setMetadata in interface IMetadata

Parameters:

ppPropertySet - A reference to a com.esri.arcgis.system.IPropertySet (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

synchronize

public void synchronize(int action,
                        int interval)
                 throws IOException,
                        AutomationException

Updates metadata with the current properties; may create metadata if it doesn't already exist.

Description

The Synchronize method is used to extract metadata properties from an object and write those properties to the metadata .xml. Depending on the value of the esriMetaSyncAction, the Synchronize method may generate a new set of metadata if it doesn't already exist.

Remarks

The following actions will result in synchronization given each of the listed conditions:

Action	Metadata status	Esri/Sync element	Interval parameter
esriMSAAccessed	Doesn't matter	Must not be FALSE	Must be less than actual interval
esriMSAAlways	Doesn't matter	Doesn't matter	Doesn't matter
esriMSACreated	Must not exist	Must not be FALSE	Must be less than actual interval
esriMSANotCreated	Must exist	Must not be FALSE	Must be less than actual interval
esriMSAOverwrite	Doesn't matter	Doesn't matter	Doesn't matter

The difference between esriMSAAlways and esriMSAOverwrite lies in which elements are synchronized. esriMSAAlways will honor the removal or value change of an element's Sync attribute (to disable synchronization), whereas using esriMSAOverwrite is equivalent to setting the IXmlPropertySet2.OverwriteSyncAttribute to true for the metadata's property set, meaning that even elements without a Sync attribute of TRUE will be synchronized.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

synchronize in interface IMetadata

Parameters:

action - A com.esri.arcgis.geodatabase.esriMetadataSyncAction constant (in)

interval - The interval (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

isCanEditMetadata

public boolean isCanEditMetadata()
                          throws IOException,
                                 AutomationException

Indicates if metadata can be edited.

Remarks

This property is available to those objects that support metadata.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

isCanEditMetadata in interface IMetadataEdit

Returns:

The pCanEdit

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getNativeType

public INativeType getNativeType()
                          throws IOException,
                                 AutomationException

The native type.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

getNativeType in interface INativeTypeInfo

Returns:

A reference to a com.esri.arcgis.geodatabase.INativeType

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getSQLPrivileges

public int getSQLPrivileges()
                     throws IOException,
                            AutomationException

The database privileges.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

getSQLPrivileges in interface ISQLPrivilege

Returns:

The privileges

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

grant

public void grant(String userName,
                  int privileges,
                  boolean withGrant)
           throws IOException,
                  AutomationException

Grants privileges for the database user.

Description

The esriSQLPrivilege enumeration defines privieges that that can be granted with ISQLPrivilege:

Enumeration esriSQLPrivilege	SQL Privileges
1 - esriSelectPrivilege	Select
2 - esriUpdatePrivilege	Update
4 - esriInsertPrivilege	Insert
8 - esriDeletePrivilege	Delete

The values may be bitwise OR'd together if more than one privilege applies (note that this is equal to summing the integer values). The dataset name could be a feature dataset, in which case the user would receive privileges on all the contents of the feature dataset.

If TRUE, the withGrant parameter denotes that the user may grant access privileges to other users.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

grant in interface ISQLPrivilege

Parameters:

userName - The userName (in)

privileges - The privileges (in)

withGrant - The withGrant (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

revoke

public void revoke(String userName,
                   int privileges)
            throws IOException,
                   AutomationException

Revokes privileges for the database user.

Remarks

The esriSQLPrivilege enumeration defines privieges that that can be revoked with ISQLPrivilege:

Enumeration esriSQLPrivilege	SQL Privileges
1 - esriSelectPrivilege	Select
2 - esriUpdatePrivilege	Update
4 - esriInsertPrivilege	Insert
8 - esriDeletePrivilege	Delete

The values may be bitwise OR'd together if more than one priviege applies (note that this is equal to summing the integer values). The dataset name could be a feature dataset, in which case the user would no longer have privileges on the contents of the feature dataset.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

revoke in interface ISQLPrivilege

Parameters:

userName - The userName (in)

privileges - The privileges (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