com.esri.arcgis.datasourcesraster
Class GCSShiftXform

java.lang.Object
  extended by com.esri.arcgis.datasourcesraster.GCSShiftXform
All Implemented Interfaces:
IGCSShiftXform, IGeodataXform, ITransformation, com.esri.arcgis.interop.RemoteObjRef, IClone, IDocumentVersionSupportGEN, IPersist, IPersistStream, IXMLSerialize, IXMLVersionSupport, java.io.Externalizable, java.io.Serializable

public class GCSShiftXform
extends java.lang.Object
implements com.esri.arcgis.interop.RemoteObjRef, IGCSShiftXform, ITransformation, IClone, IPersistStream, IDocumentVersionSupportGEN, IXMLSerialize, IXMLVersionSupport, java.io.Externalizable

COM Class 'GCSShiftXform'. Generated 3/19/2015 1:20:42 PM from 'C:\ArcGIS\COM\esriDataSourcesRaster.olb'

Description 'A GCS shift geodata transform class.' 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
static long serialVersionUID
           
 
Fields inherited from interface com.esri.arcgis.datasourcesraster.IGCSShiftXform
IID, IIDcc0593ef_718f_46c4_b278_b7fbb3c12cf4, xxDummy
 
Fields inherited from interface com.esri.arcgis.geodatabase.IGeodataXform
IID5e6cf525_4e74_419b_946f_7da9bfdf815d
 
Fields inherited from interface com.esri.arcgis.geometry.ITransformation
IID, IID6f2cf924_7e00_11d0_82f4_0000f8034032, xxDummy
 
Fields inherited from interface com.esri.arcgis.system.IClone
IID, IID9bff8aeb_e415_11d0_943c_080009eebecb, 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
 
Fields inherited from interface com.esri.arcgis.system.IXMLSerialize
IID, IIDc8545045_6615_48e3_af27_52a0e5fc35e2, xxDummy
 
Fields inherited from interface com.esri.arcgis.system.IXMLVersionSupport
IID, IID72ca65b9_13de_48b7_8443_717b69b72a99, xxDummy
 
Constructor Summary
GCSShiftXform()
          Constructs a GCSShiftXform using ArcGIS Engine.
GCSShiftXform(java.lang.Object obj)
          Deprecated. As of ArcGIS 9.2, replaced by normal Java casts.
GCSShiftXform theGCSShiftXform = (GCSShiftXform) obj;
 
Method Summary
 void assign(IClone src)
          Assigns the properties of src to the receiver.
 java.lang.Object convertToSupportedObject(int docVersion)
          Convert the object to another object that is supported.
 void deserialize(IXMLSerializeData data)
          Deserializes an object from XML.
 boolean equals(java.lang.Object o)
          Compare this object with another
 IClone esri_clone()
          Clones the receiver and assigns the result to *clone.
 void getClassID(GUID[] pClassID)
          getClassID
static java.lang.String getClsid()
          getClsid.
 IGeometryCollection getDomains()
          The domains in output space.
 com.esri.arcgis.interop.Dispatch getJintegraDispatch()
          Deprecated. Internal use only.
 double getLeftLongitude()
          The left longitude source GCS.
 java.lang.String getMinNamespaceSupported()
          The minimum namespace the class can serialize to (eg the 90 namespace).
 void getSizeMax(_ULARGE_INTEGER[] pcbSize)
          getSizeMax
 ISpatialReference getSpatialReference()
          The output spatial reference after applying this transform.
 int hashCode()
          the hashcode for this object
 void isDirty()
          isDirty
 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 isIdentity()
          Indicates if this geodata transform is an identity transform.
 boolean isReverseShift()
          Indicates if reversely shifting to the left longitude.
 boolean isSupportedAtVersion(int docVersion)
          Is this object valid at the given document version.
 void load(IStream pstm)
          load
 void readExternal(java.io.ObjectInput in)
           
 void release()
          Release a GCSShiftXform.
 void save(IStream pstm, int fClearDirty)
          save
 void serialize(IXMLSerializeData data)
          Serializes an object to XML.
 void setLeftLongitude(double pLon)
          The left longitude source GCS.
 void setReverseShift(boolean pReverseShift)
          Indicates if reversely shifting to the left longitude.
 void setSpatialReferenceByRef(ISpatialReference spatialRefence)
          The output spatial reference after applying this transform.
 void transform(int direction, int npoints, _WKSPoint[] points)
          Transforms a set of points in a given direction.
 void transformCellsize(int direction, double[] dx, double[] dy, IEnvelope areaOfInterest)
          Transforms a cellsize in a given direction.
 void transformExtent(int direction, IEnvelope[] extent)
          Transforms an extent in a given direction.
 void transformMeasuresFF(int direction, int cMeasures, double[] inMeasures, double[] outMeasures)
          Transforms floating point measures to floating point measures (or do the inverse).
 void transformMeasuresFI(int direction, int cMeasures, double[] inMeasures, int[] outMeasures)
          Transforms floating point measures to integer measures (or do the inverse).
 void transformMeasuresIF(int direction, int cMeasures, int[] inMeasures, double[] outMeasures)
          Transforms integer measures to floating point measures (or do the inverse).
 void transformMeasuresII(int direction, int cMeasures, int[] inMeasures, int[] outMeasures)
          Transforms integer measures to integer measures (or do the inverse).
 void transformPoints(int direction, IPointCollection[] points)
          Transforms a point collection in a given direction
 void transformPointsFF(int direction, int cPoints, double[] inPoints, double[] outPoints)
          Transforms floating point points to floating point points (or do the inverse).
 void transformPointsFI(int direction, int cPoints, double[] inPoints, int[] outPoints)
          Transforms floating point points to integer points (or do the inverse).
 void transformPointsIF(int direction, int cPoints, int[] inPoints, double[] outPoints)
          Transforms integer points to floating point points (or do the inverse).
 void transformPointsII(int direction, int cPoints, int[] inPoints, int[] outPoints)
          Transforms integer points to integer points (or do the inverse).
 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

GCSShiftXform

public GCSShiftXform()
              throws java.io.IOException,
                     java.net.UnknownHostException
Constructs a GCSShiftXform using ArcGIS Engine.

Throws:
java.io.IOException - if there are interop problems
java.net.UnknownHostException - if there are interop problems

GCSShiftXform

public GCSShiftXform(java.lang.Object obj)
              throws java.io.IOException
Deprecated. As of ArcGIS 9.2, replaced by normal Java casts.
GCSShiftXform theGCSShiftXform = (GCSShiftXform) obj;

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

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()
Deprecated. Internal use only.

Specified by:
getJintegraDispatch in interface com.esri.arcgis.interop.RemoteObjRef

release

public void release()
Release a GCSShiftXform.

Specified by:
release in interface com.esri.arcgis.interop.RemoteObjRef

getLeftLongitude

public double getLeftLongitude()
                        throws java.io.IOException,
                               AutomationException
The left longitude source GCS.

Specified by:
getLeftLongitude in interface IGCSShiftXform
Returns:
The pLon
Throws:
java.io.IOException - If there are interop problems.
AutomationException - If the ArcObject component throws an exception.

setLeftLongitude

public void setLeftLongitude(double pLon)
                      throws java.io.IOException,
                             AutomationException
The left longitude source GCS.

Specified by:
setLeftLongitude in interface IGCSShiftXform
Parameters:
pLon - The pLon (in)
Throws:
java.io.IOException - If there are interop problems.
AutomationException - If the ArcObject component throws an exception.

isReverseShift

public boolean isReverseShift()
                       throws java.io.IOException,
                              AutomationException
Indicates if reversely shifting to the left longitude.

Specified by:
isReverseShift in interface IGCSShiftXform
Returns:
The pReverseShift
Throws:
java.io.IOException - If there are interop problems.
AutomationException - If the ArcObject component throws an exception.

setReverseShift

public void setReverseShift(boolean pReverseShift)
                     throws java.io.IOException,
                            AutomationException
Indicates if reversely shifting to the left longitude.

Specified by:
setReverseShift in interface IGCSShiftXform
Parameters:
pReverseShift - The pReverseShift (in)
Throws:
java.io.IOException - If there are interop problems.
AutomationException - If the ArcObject component throws an exception.

getSpatialReference

public ISpatialReference getSpatialReference()
                                      throws java.io.IOException,
                                             AutomationException
The output spatial reference after applying this transform.

Specified by:
getSpatialReference in interface IGeodataXform
Returns:
A reference to a com.esri.arcgis.geometry.ISpatialReference
Throws:
java.io.IOException - If there are interop problems.
AutomationException - If the ArcObject component throws an exception.

setSpatialReferenceByRef

public void setSpatialReferenceByRef(ISpatialReference spatialRefence)
                              throws java.io.IOException,
                                     AutomationException
The output spatial reference after applying this transform.

Specified by:
setSpatialReferenceByRef in interface IGeodataXform
Parameters:
spatialRefence - A reference to a com.esri.arcgis.geometry.ISpatialReference (in)
Throws:
java.io.IOException - If there are interop problems.
AutomationException - If the ArcObject component throws an exception.

getDomains

public IGeometryCollection getDomains()
                               throws java.io.IOException,
                                      AutomationException
The domains in output space.

Specified by:
getDomains in interface IGeodataXform
Returns:
A reference to a com.esri.arcgis.geometry.IGeometryCollection
Throws:
java.io.IOException - If there are interop problems.
AutomationException - If the ArcObject component throws an exception.

isIdentity

public boolean isIdentity()
                   throws java.io.IOException,
                          AutomationException
Indicates if this geodata transform is an identity transform.

Specified by:
isIdentity in interface IGeodataXform
Returns:
The isIdentity
Throws:
java.io.IOException - If there are interop problems.
AutomationException - If the ArcObject component throws an exception.

transform

public void transform(int direction,
                      int npoints,
                      _WKSPoint[] points)
               throws java.io.IOException,
                      AutomationException
Transforms a set of points in a given direction.

Specified by:
transform in interface IGeodataXform
Parameters:
direction - A com.esri.arcgis.geometry.esriTransformDirection constant (in)
npoints - The npoints (in)
points - A Structure: com.esri.arcgis.system._WKSPoint (A com.esri.arcgis.system._WKSPoint COM typedef) (in/out: use single element array)
Throws:
java.io.IOException - If there are interop problems.
AutomationException - If the ArcObject component throws an exception.

transformCellsize

public void transformCellsize(int direction,
                              double[] dx,
                              double[] dy,
                              IEnvelope areaOfInterest)
                       throws java.io.IOException,
                              AutomationException
Transforms a cellsize in a given direction.

Specified by:
transformCellsize in interface IGeodataXform
Parameters:
direction - A com.esri.arcgis.geometry.esriTransformDirection constant (in)
dx - The dx (in/out: use single element array)
dy - The dy (in/out: use single element array)
areaOfInterest - A reference to a com.esri.arcgis.geometry.IEnvelope (in)
Throws:
java.io.IOException - If there are interop problems.
AutomationException - If the ArcObject component throws an exception.

transformExtent

public void transformExtent(int direction,
                            IEnvelope[] extent)
                     throws java.io.IOException,
                            AutomationException
Transforms an extent in a given direction.

Specified by:
transformExtent in interface IGeodataXform
Parameters:
direction - A com.esri.arcgis.geometry.esriTransformDirection constant (in)
extent - A reference to a com.esri.arcgis.geometry.IEnvelope (in/out: use single element array)
Throws:
java.io.IOException - If there are interop problems.
AutomationException - If the ArcObject component throws an exception.

transformPoints

public void transformPoints(int direction,
                            IPointCollection[] points)
                     throws java.io.IOException,
                            AutomationException
Transforms a point collection in a given direction

Specified by:
transformPoints in interface IGeodataXform
Parameters:
direction - A com.esri.arcgis.geometry.esriTransformDirection constant (in)
points - A reference to a com.esri.arcgis.geometry.IPointCollection (in/out: use single element array)
Throws:
java.io.IOException - If there are interop problems.
AutomationException - If the ArcObject component throws an exception.

transformMeasuresFF

public void transformMeasuresFF(int direction,
                                int cMeasures,
                                double[] inMeasures,
                                double[] outMeasures)
                         throws java.io.IOException,
                                AutomationException
Transforms floating point measures to floating point measures (or do the inverse).

Specified by:
transformMeasuresFF in interface ITransformation
Parameters:
direction - A com.esri.arcgis.geometry.esriTransformDirection constant (in)
cMeasures - The cMeasures (in)
inMeasures - The inMeasures (in)
outMeasures - The outMeasures (in)
Throws:
java.io.IOException - If there are interop problems.
AutomationException - If the ArcObject component throws an exception.

transformMeasuresFI

public void transformMeasuresFI(int direction,
                                int cMeasures,
                                double[] inMeasures,
                                int[] outMeasures)
                         throws java.io.IOException,
                                AutomationException
Transforms floating point measures to integer measures (or do the inverse).

Specified by:
transformMeasuresFI in interface ITransformation
Parameters:
direction - A com.esri.arcgis.geometry.esriTransformDirection constant (in)
cMeasures - The cMeasures (in)
inMeasures - The inMeasures (in)
outMeasures - The outMeasures (in)
Throws:
java.io.IOException - If there are interop problems.
AutomationException - If the ArcObject component throws an exception.

transformMeasuresIF

public void transformMeasuresIF(int direction,
                                int cMeasures,
                                int[] inMeasures,
                                double[] outMeasures)
                         throws java.io.IOException,
                                AutomationException
Transforms integer measures to floating point measures (or do the inverse).

Specified by:
transformMeasuresIF in interface ITransformation
Parameters:
direction - A com.esri.arcgis.geometry.esriTransformDirection constant (in)
cMeasures - The cMeasures (in)
inMeasures - The inMeasures (in)
outMeasures - The outMeasures (in)
Throws:
java.io.IOException - If there are interop problems.
AutomationException - If the ArcObject component throws an exception.

transformMeasuresII

public void transformMeasuresII(int direction,
                                int cMeasures,
                                int[] inMeasures,
                                int[] outMeasures)
                         throws java.io.IOException,
                                AutomationException
Transforms integer measures to integer measures (or do the inverse).

Specified by:
transformMeasuresII in interface ITransformation
Parameters:
direction - A com.esri.arcgis.geometry.esriTransformDirection constant (in)
cMeasures - The cMeasures (in)
inMeasures - The inMeasures (in)
outMeasures - The outMeasures (in)
Throws:
java.io.IOException - If there are interop problems.
AutomationException - If the ArcObject component throws an exception.

transformPointsFF

public void transformPointsFF(int direction,
                              int cPoints,
                              double[] inPoints,
                              double[] outPoints)
                       throws java.io.IOException,
                              AutomationException
Transforms floating point points to floating point points (or do the inverse).

Specified by:
transformPointsFF in interface ITransformation
Parameters:
direction - A com.esri.arcgis.geometry.esriTransformDirection constant (in)
cPoints - The cPoints (in)
inPoints - The inPoints (in)
outPoints - The outPoints (in)
Throws:
java.io.IOException - If there are interop problems.
AutomationException - If the ArcObject component throws an exception.

transformPointsFI

public void transformPointsFI(int direction,
                              int cPoints,
                              double[] inPoints,
                              int[] outPoints)
                       throws java.io.IOException,
                              AutomationException
Transforms floating point points to integer points (or do the inverse).

Specified by:
transformPointsFI in interface ITransformation
Parameters:
direction - A com.esri.arcgis.geometry.esriTransformDirection constant (in)
cPoints - The cPoints (in)
inPoints - The inPoints (in)
outPoints - The outPoints (in)
Throws:
java.io.IOException - If there are interop problems.
AutomationException - If the ArcObject component throws an exception.

transformPointsIF

public void transformPointsIF(int direction,
                              int cPoints,
                              int[] inPoints,
                              double[] outPoints)
                       throws java.io.IOException,
                              AutomationException
Transforms integer points to floating point points (or do the inverse).

Specified by:
transformPointsIF in interface ITransformation
Parameters:
direction - A com.esri.arcgis.geometry.esriTransformDirection constant (in)
cPoints - The cPoints (in)
inPoints - The inPoints (in)
outPoints - The outPoints (in)
Throws:
java.io.IOException - If there are interop problems.
AutomationException - If the ArcObject component throws an exception.

transformPointsII

public void transformPointsII(int direction,
                              int cPoints,
                              int[] inPoints,
                              int[] outPoints)
                       throws java.io.IOException,
                              AutomationException
Transforms integer points to integer points (or do the inverse).

Specified by:
transformPointsII in interface ITransformation
Parameters:
direction - A com.esri.arcgis.geometry.esriTransformDirection constant (in)
cPoints - The cPoints (in)
inPoints - The inPoints (in)
outPoints - The outPoints (in)
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.

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.

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.

isSupportedAtVersion

public boolean isSupportedAtVersion(int docVersion)
                             throws java.io.IOException,
                                    AutomationException
Is this object valid at the given document version.

Remarks

Use IsSupportedAtVersion to identify if a particular object should be saved to the ObjectStream. This result is based on the esriArcGISVersion enumeration. In some instances, if the object is not supported at a particular ArcGIS version, the object may support conversion to another similar object; use IDocumentVersionSupportGEN::ConvertToSupportedObject to accomplish this.

Product Availability

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

Specified by:
isSupportedAtVersion in interface IDocumentVersionSupportGEN
Parameters:
docVersion - A com.esri.arcgis.system.esriArcGISVersion constant (in)
Returns:
The supported
Throws:
java.io.IOException - If there are interop problems.
AutomationException - If the ArcObject component throws an exception.

convertToSupportedObject

public java.lang.Object convertToSupportedObject(int docVersion)
                                          throws java.io.IOException,
                                                 AutomationException
Convert the object to another object that is supported.

Remarks

This method should be used when IDocumentVersionSupportGEN::IsSupportedAtVersion returns FALSE. Calling ConvertToSupportedObject will return an IUnknown pointer to a relevant object supported at the particular ArcGIS version. Not all objects will return a supported object; in these cases a null pointer will be returned.

Product Availability

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

Specified by:
convertToSupportedObject in interface IDocumentVersionSupportGEN
Parameters:
docVersion - A com.esri.arcgis.system.esriArcGISVersion constant (in)
Returns:
A Variant
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.

getMinNamespaceSupported

public java.lang.String getMinNamespaceSupported()
                                          throws java.io.IOException,
                                                 AutomationException
The minimum namespace the class can serialize to (eg the 90 namespace).

Specified by:
getMinNamespaceSupported in interface IXMLVersionSupport
Returns:
The namespaceURI
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