com.esri.arcgis.geodatabase

Class Field

java.lang.Object

com.esri.arcgis.geodatabase.Field

All Implemented Interfaces:

IField, IFieldEdit, IGPDescribe, IGPValue, IModelInfo, com.esri.arcgis.interop.RemoteObjRef, IClone, IPersist, IPersistStream, IXMLSerialize, java.io.Externalizable, java.io.Serializable

public class Field
extends java.lang.Object
implements com.esri.arcgis.interop.RemoteObjRef, IField, IFieldEdit, IModelInfo, IPersist, IClone, IGPValue, IXMLSerialize, IPersistStream, IGPDescribe, java.io.Externalizable

COM Class 'Field'. Generated 5/5/2025 2:28:33 PM from 'X:\ArcGIS\com\server\esriGeoDatabase.tlb'

Description 'Esri Field object.' Generator Options: PromptForTypeLibraries = False ClashPrefix = esri_ LowerCaseMemberNames = True IDispatchOnly = False RetryOnReject = False AwtForOcxs = True ArraysAsObjects = False DontRenameSameMethods = False ImplementConflictingInterfaces = True ReuseMethods = True RenameConflictingInterfaceMethods = True GenBeanInfo = True GenerateJavadoc =

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static long	serialVersionUID

Fields inherited from interface com.esri.arcgis.geodatabase.IFieldEdit

IID, IID300aa631_b207_11d0_beca_00805f7c4268, xxDummy

Fields inherited from interface com.esri.arcgis.geodatabase.IField

IIDfcb01cb3_9f0b_11d0_bec7_00805f7c4268

Fields inherited from interface com.esri.arcgis.geodatabase.IModelInfo

IID, IID2d660904_1dbd_11d3_9f87_00c04f6bdd84, xxDummy

Fields inherited from interface com.esri.arcgis.system.IClone

IID, IID9bff8aeb_e415_11d0_943c_080009eebecb, xxDummy

Fields inherited from interface com.esri.arcgis.geodatabase.IGPValue

IID, IID92ee08b6_c757_4178_803c_67cd665ac801, xxDummy

Fields inherited from interface com.esri.arcgis.system.IXMLSerialize

IID, IIDc8545045_6615_48e3_af27_52a0e5fc35e2, xxDummy

Fields inherited from interface com.esri.arcgis.system.IPersistStream

IID, IID00000109_0000_0000_c000_000000000046, xxDummy

Fields inherited from interface com.esri.arcgis.system.IPersist

IID0000010c_0000_0000_c000_000000000046

Constructor Summary

Constructors

Constructor and Description
Field() Constructs a Field using ArcGIS Engine.
Field(java.lang.Object obj) Deprecated. As of ArcGIS 9.2, replaced by normal Java casts. Field theField = (Field) obj;

Method Summary

Modifier and Type	Method and Description
void	assign(IClone src) Assigns the properties of src to the receiver.
boolean	checkValue(java.lang.Object value) Indicates if the value is valid given the field definition.
java.lang.Object	describe(java.lang.String name) The description of the named object.
void	deserialize(IXMLSerializeData data) Deserializes an object from XML.
void	empty() Clears the value object.
boolean	equals(java.lang.Object o) Compare this object with another
IClone	esri_clone() Clones the receiver and assigns the result to *clone.
java.lang.String	getAliasName() The alias name of the field.
java.lang.String	getAsText() Provides the value of the value object.
void	getClassID(GUID[] pClassID) getClassID
static java.lang.String	getClsid() getClsid.
java.lang.Object	getDefaultValue() The default value of the field.
IDomain	getDomain() The default domain of the field.
IGeometryDef	getGeometryDef() The geometry definition for the field if IsGeometry is TRUE.
com.esri.arcgis.interop.Dispatch	getJintegraDispatch() Gets a reference to a com.esri.arcgis.interop.Dispatch which can be used to access the COM object that support for this interface indicates the implementing class references.
int	getLength() The maximum length, in bytes, for values described by the field.
java.lang.String	getModelName() The model name of the field.
java.lang.String	getName() The name of the field.
int	getPrecision() The precision for field values.
IRasterDef	getRasterDef() The raster column definition.
int	getScale() The scale for field values.
void	getSizeMax(_ULARGE_INTEGER[] pcbSize) getSizeMax
int	getType() The type of the field.
int	getVarType() The VARTYPE of the field (e.g.
int	hashCode() the hashcode for this object
IGPDataType	IGPValue_getDataType() The data type of the value object.
void	isDirty() isDirty
boolean	isDomainFixed() Indicates if the field's domain is fixed.
boolean	isEditable() Indicates if the field is editable.
boolean	isEmpty() Indicates if the value object is empty.
boolean	isEqual(IClone other) Indicates if the receiver and other have the same properties.
boolean	isIdentical(IClone other) Indicates if the receiver and other are the same object.
boolean	isNullable() Indicates if the field can contain null values.
boolean	isRequired() Indicates if the field is required.
void	load(IStream pstm) load
void	readExternal(java.io.ObjectInput in)
void	release() Release this COM object reference
void	save(IStream pstm, int fClearDirty) save
void	serialize(IXMLSerializeData data) Serializes an object to XML.
void	setAliasName(java.lang.String rhs1) The alias name of the field.
IGPMessage	setAsText(java.lang.String text) Provides the value of the value object with the given string value.
void	setDefaultValue(java.lang.Object rhs1) The default value of the field.
void	setDomainByRef(IDomain rhs1) The default domain of the field.
void	setDomainFixed(boolean rhs1) Indicates if the field's domain cannot be modified.
void	setEditable(boolean rhs1) Indicates if the field can be edited.
void	setGeometryDefByRef(IGeometryDef rhs1) The geometry definition if IsGeometry is TRUE.
void	setIsNullable(boolean rhs1) Indicates if field values can be null.
void	setLength(int rhs1) The maximum length, in bytes, for field values.
void	setModelName(java.lang.String name) The model name of the field.
void	setName(java.lang.String rhs1) The name of the field.
void	setPrecision(int rhs1) The precision for field values.
void	setRasterDefByRef(IRasterDef rhs1) The raster column definition.
void	setRequired(boolean rhs1) Indicates if the field is required.
void	setScale(int rhs1) The scale for field values.
void	setType(int rhs1) The type for the field.
void	writeExternal(java.io.ObjectOutput out)

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

public static final long serialVersionUID

See Also:

Constant Field Values

Constructor Detail

Field

public Field()
      throws java.io.IOException,
             java.net.UnknownHostException

Constructs a Field using ArcGIS Engine.

Throws:

java.io.IOException - if there are interop problems

java.net.UnknownHostException - if there are interop problems

Field

public Field(java.lang.Object obj)
      throws java.io.IOException

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

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

Parameters:

obj - an object returned from ArcGIS Engine or Server

Throws:

java.io.IOException - if there are interop problems

Method Detail

getClsid

public static java.lang.String getClsid()

getClsid.

equals

public boolean equals(java.lang.Object o)

Compare this object with another

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

the hashcode for this object

Overrides:

hashCode in class java.lang.Object

getJintegraDispatch

public com.esri.arcgis.interop.Dispatch getJintegraDispatch()

Gets a reference to a com.esri.arcgis.interop.Dispatch which can be used to access the COM object that support for this interface indicates the implementing class references.

Specified by:

getJintegraDispatch in interface com.esri.arcgis.interop.RemoteObjRef

Returns:

the COM object reference

release

public void release()

Release this COM object reference

Specified by:

release in interface com.esri.arcgis.interop.RemoteObjRef

getName

public java.lang.String getName()
                         throws java.io.IOException,
                                AutomationException

The name of the field.

Specified by:

getName in interface IField

Returns:

The name

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getAliasName

public java.lang.String getAliasName()
                              throws java.io.IOException,
                                     AutomationException

The alias name of the field.

Specified by:

getAliasName in interface IField

Returns:

The name

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getType

public int getType()
            throws java.io.IOException,
                   AutomationException

The type of the field.

Specified by:

getType in interface IField

Returns:

A com.esri.arcgis.geodatabase.esriFieldType constant

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getDomain

public IDomain getDomain()
                  throws java.io.IOException,
                         AutomationException

The default domain of the field.

Specified by:

getDomain in interface IField

Returns:

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

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getDefaultValue

public java.lang.Object getDefaultValue()
                                 throws java.io.IOException,
                                        AutomationException

The default value of the field.

Specified by:

getDefaultValue in interface IField

Returns:

A Variant

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getLength

public int getLength()
              throws java.io.IOException,
                     AutomationException

The maximum length, in bytes, for values described by the field.

Specified by:

getLength in interface IField

Returns:

The length

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getPrecision

public int getPrecision()
                 throws java.io.IOException,
                        AutomationException

The precision for field values.

Specified by:

getPrecision in interface IField

Returns:

The length

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getScale

public int getScale()
             throws java.io.IOException,
                    AutomationException

The scale for field values.

Specified by:

getScale in interface IField

Returns:

The length

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

isNullable

public boolean isNullable()
                   throws java.io.IOException,
                          AutomationException

Indicates if the field can contain null values.

Specified by:

isNullable in interface IField

Returns:

The isNullable

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getGeometryDef

public IGeometryDef getGeometryDef()
                            throws java.io.IOException,
                                   AutomationException

The geometry definition for the field if IsGeometry is TRUE.

Specified by:

getGeometryDef in interface IField

Returns:

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

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getVarType

public int getVarType()
               throws java.io.IOException,
                      AutomationException

The VARTYPE of the field (e.g. VT_I4).

Specified by:

getVarType in interface IField

Returns:

The varType

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

isDomainFixed

public boolean isDomainFixed()
                      throws java.io.IOException,
                             AutomationException

Indicates if the field's domain is fixed.

Specified by:

isDomainFixed in interface IField

Returns:

The isFixed

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

isRequired

public boolean isRequired()
                   throws java.io.IOException,
                          AutomationException

Indicates if the field is required.

Specified by:

isRequired in interface IField

Returns:

The isRequired

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

isEditable

public boolean isEditable()
                   throws java.io.IOException,
                          AutomationException

Indicates if the field is editable.

Specified by:

isEditable in interface IField

Returns:

The isEditable

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

checkValue

public boolean checkValue(java.lang.Object value)
                   throws java.io.IOException,
                          AutomationException

Indicates if the value is valid given the field definition.

Specified by:

checkValue in interface IField

Parameters:

value - A Variant (in)

Returns:

The isValidValue

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getRasterDef

public IRasterDef getRasterDef()
                        throws java.io.IOException,
                               AutomationException

The raster column definition.

Specified by:

getRasterDef in interface IField

Returns:

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

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setName

public void setName(java.lang.String rhs1)
             throws java.io.IOException,
                    AutomationException

The name of the field.

Specified by:

setName in interface IFieldEdit

Parameters:

rhs1 - The rhs1 (in)

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setAliasName

public void setAliasName(java.lang.String rhs1)
                  throws java.io.IOException,
                         AutomationException

The alias name of the field.

Specified by:

setAliasName in interface IFieldEdit

Parameters:

rhs1 - The rhs1 (in)

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setDomainByRef

public void setDomainByRef(IDomain rhs1)
                    throws java.io.IOException,
                           AutomationException

The default domain of the field.

Specified by:

setDomainByRef in interface IFieldEdit

Parameters:

rhs1 - A reference to a com.esri.arcgis.geodatabase.IDomain (in)

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setDefaultValue

public void setDefaultValue(java.lang.Object rhs1)
                     throws java.io.IOException,
                            AutomationException

The default value of the field.

Specified by:

setDefaultValue in interface IFieldEdit

Parameters:

rhs1 - A Variant (in)

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setType

public void setType(int rhs1)
             throws java.io.IOException,
                    AutomationException

The type for the field.

Specified by:

setType in interface IFieldEdit

Parameters:

rhs1 - A com.esri.arcgis.geodatabase.esriFieldType constant (in)

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setLength

public void setLength(int rhs1)
               throws java.io.IOException,
                      AutomationException

The maximum length, in bytes, for field values.

Specified by:

setLength in interface IFieldEdit

Parameters:

rhs1 - The rhs1 (in)

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setPrecision

public void setPrecision(int rhs1)
                  throws java.io.IOException,
                         AutomationException

The precision for field values.

Specified by:

setPrecision in interface IFieldEdit

Parameters:

rhs1 - The rhs1 (in)

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setScale

public void setScale(int rhs1)
              throws java.io.IOException,
                     AutomationException

The scale for field values.

Specified by:

setScale in interface IFieldEdit

Parameters:

rhs1 - The rhs1 (in)

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setIsNullable

public void setIsNullable(boolean rhs1)
                   throws java.io.IOException,
                          AutomationException

Indicates if field values can be null.

Specified by:

setIsNullable in interface IFieldEdit

Parameters:

rhs1 - The rhs1 (in)

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setGeometryDefByRef

public void setGeometryDefByRef(IGeometryDef rhs1)
                         throws java.io.IOException,
                                AutomationException

The geometry definition if IsGeometry is TRUE.

Specified by:

setGeometryDefByRef in interface IFieldEdit

Parameters:

rhs1 - A reference to a com.esri.arcgis.geodatabase.IGeometryDef (in)

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setDomainFixed

public void setDomainFixed(boolean rhs1)
                    throws java.io.IOException,
                           AutomationException

Indicates if the field's domain cannot be modified.

Specified by:

setDomainFixed in interface IFieldEdit

Parameters:

rhs1 - The rhs1 (in)

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setRequired

public void setRequired(boolean rhs1)
                 throws java.io.IOException,
                        AutomationException

Indicates if the field is required.

Specified by:

setRequired in interface IFieldEdit

Parameters:

rhs1 - The rhs1 (in)

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setEditable

public void setEditable(boolean rhs1)
                 throws java.io.IOException,
                        AutomationException

Indicates if the field can be edited. This should always be set to true.

Specified by:

setEditable in interface IFieldEdit

Parameters:

rhs1 - The rhs1 (in)

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setRasterDefByRef

public void setRasterDefByRef(IRasterDef rhs1)
                       throws java.io.IOException,
                              AutomationException

The raster column definition.

Specified by:

setRasterDefByRef in interface IFieldEdit

Parameters:

rhs1 - A reference to a com.esri.arcgis.geodatabase.IRasterDef (in)

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getModelName

public java.lang.String getModelName()
                              throws java.io.IOException,
                                     AutomationException

The model name of the field.

Specified by:

getModelName in interface IModelInfo

Returns:

The name

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setModelName

public void setModelName(java.lang.String name)
                  throws java.io.IOException,
                         AutomationException

The model name of the field.

Specified by:

setModelName in interface IModelInfo

Parameters:

name - The name (in)

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getClassID

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

getClassID

Specified by:

getClassID in interface IPersist

Parameters:

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

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

esri_clone

public IClone esri_clone()
                  throws java.io.IOException,
                         AutomationException

Clones the receiver and assigns the result to *clone.

Specified by:

esri_clone in interface IClone

Returns:

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

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

assign

public void assign(IClone src)
            throws java.io.IOException,
                   AutomationException

Assigns the properties of src to the receiver.

Specified by:

assign in interface IClone

Parameters:

src - A reference to a com.esri.arcgis.system.IClone (in)

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

isEqual

public boolean isEqual(IClone other)
                throws java.io.IOException,
                       AutomationException

Indicates if the receiver and other have the same properties.

Specified by:

isEqual in interface IClone

Parameters:

other - A reference to a com.esri.arcgis.system.IClone (in)

Returns:

The equal

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

isIdentical

public boolean isIdentical(IClone other)
                    throws java.io.IOException,
                           AutomationException

Indicates if the receiver and other are the same object.

Specified by:

isIdentical in interface IClone

Parameters:

other - A reference to a com.esri.arcgis.system.IClone (in)

Returns:

The identical

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

IGPValue_getDataType

public IGPDataType IGPValue_getDataType()
                                 throws java.io.IOException,
                                        AutomationException

The data type of the value object.

Specified by:

IGPValue_getDataType in interface IGPValue

Returns:

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

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

isEmpty

public boolean isEmpty()
                throws java.io.IOException,
                       AutomationException

Indicates if the value object is empty.

Specified by:

isEmpty in interface IGPValue

Returns:

The isEmpty

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

empty

public void empty()
           throws java.io.IOException,
                  AutomationException

Clears the value object.

Specified by:

empty in interface IGPValue

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getAsText

public java.lang.String getAsText()
                           throws java.io.IOException,
                                  AutomationException

Provides the value of the value object.

Specified by:

getAsText in interface IGPValue

Returns:

The text

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setAsText

public IGPMessage setAsText(java.lang.String text)
                     throws java.io.IOException,
                            AutomationException

Provides the value of the value object with the given string value.

Specified by:

setAsText in interface IGPValue

Parameters:

text - The text (in)

Returns:

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

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

serialize

public void serialize(IXMLSerializeData data)
               throws java.io.IOException,
                      AutomationException

Serializes an object to XML.

Specified by:

serialize in interface IXMLSerialize

Parameters:

data - A reference to a com.esri.arcgis.system.IXMLSerializeData (in)

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

deserialize

public void deserialize(IXMLSerializeData data)
                 throws java.io.IOException,
                        AutomationException

Deserializes an object from XML.

Specified by:

deserialize in interface IXMLSerialize

Parameters:

data - A reference to a com.esri.arcgis.system.IXMLSerializeData (in)

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

isDirty

public void isDirty()
             throws java.io.IOException,
                    AutomationException

isDirty

Specified by:

isDirty in interface IPersistStream

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

load

public void load(IStream pstm)
          throws java.io.IOException,
                 AutomationException

load

Specified by:

load in interface IPersistStream

Parameters:

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

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

save

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

save

Specified by:

save in interface IPersistStream

Parameters:

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

fClearDirty - The fClearDirty (in)

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getSizeMax

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

getSizeMax

Specified by:

getSizeMax in interface IPersistStream

Parameters:

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

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

describe

public java.lang.Object describe(java.lang.String name)
                          throws java.io.IOException,
                                 AutomationException

The description of the named object.

Product Availability

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

Specified by:

describe in interface IGPDescribe

Parameters:

name - The name (in)

Returns:

A Variant

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

writeExternal

public void writeExternal(java.io.ObjectOutput out)
                   throws java.io.IOException

Specified by:

writeExternal in interface java.io.Externalizable

Throws:

java.io.IOException

readExternal

public void readExternal(java.io.ObjectInput in)
                  throws java.io.IOException,
                         java.lang.ClassNotFoundException

Specified by:

readExternal in interface java.io.Externalizable

Throws:

java.io.IOException

java.lang.ClassNotFoundException