com.esri.arcgis.geodatabase
Class Index

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

All Implemented Interfaces:

IGPDescribe, IGPValue, IIndex, IIndexEdit, com.esri.arcgis.interop.RemoteObjRef, IClone, IPersist, IPersistStream, IXMLSerialize, Externalizable, Serializable

public class Index
extends Object
implements com.esri.arcgis.interop.RemoteObjRef, IIndex, IIndexEdit, IClone, IGPValue, IXMLSerialize, IPersist, IPersistStream, IGPDescribe, Externalizable

ESRI Index object.

Description

The Index object represents an index on a table. There are two types of indexes: spatial and attribute.

Spatial indexes exist on the shape field of a feature class. Some of the spatial index parameters, for example the grid size, are only accessible through the GeometryDef object available from the shape field. The spatial index is created automatically when a geodatabase feature class is created, so you do not have to create the spatial index with ArcObjects. However it is possible to delete and recreate the spatial index.

Attribute indexes are based on an ordered list of one or more fields in a table. The order of the list determines which field is used first when resolving data queries. There is a limit of ten fields in a geodatabase attribute index.

For geodatabases, there is one attribute index that is automatically created. This is the index on the Object ID. Another point to note is that you can access indexes created in the native environment of the DBMS.

For shapefiles, both spatial and attribute indexes can be manipulated, though note the usual limit of one field in an attribute index.

Index objects are not appropriate for use with INFO based data such as coverages. The equivalent functionality is available from the IArcInfoTable interface. See the section on coverage specific interfaces for more details.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

See Also:

Serialized Form

Constructor Summary

Index()
Constructs a Index using ArcGIS Engine.

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

Method Summary

void	assign(IClone src) Assigns the properties of src to the receiver.
Object	describe(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(Object o) Compare this object with another
IClone	esri_clone() Clones the receiver and assigns the result to *clone.
String	getAsText() Provides the value of the value object.
void	getClassID(GUID[] pClassID) getClassID
static String	getClsid() getClsid.
IFields	getFields() The fields collection for this index.
String	getName() The name of the index.
void	getSizeMax(_ULARGE_INTEGER[] pcbSize) getSizeMax
int	hashCode() the hashcode for this object
IGPDataType	IGPValue_getDataType() The data type of the value object.
boolean	isAscending() Indicates if the index is based on ascending order.
void	isDirty() isDirty
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	isUnique() Indicates if the index is unique.
void	load(IStream pstm) load
void	readExternal(ObjectInput in)
void	save(IStream pstm, int fClearDirty) save
void	serialize(IXMLSerializeData data) Serializes an object to XML.
IGPMessage	setAsText(String text) Provides the value of the value object with the given string value.
void	setFieldsByRef(IFields rhs1) The fields collection for this index.
void	setIsAscending(boolean rhs1) Indicates if the index is to be ascending.
void	setIsUnique(boolean rhs1) Indicates if the index is to be unique.
void	setName(String rhs1) The name of the index.
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

Index

public Index()
      throws IOException,
             UnknownHostException

Constructs a Index using ArcGIS Engine.

Throws:

IOException - if there are interop problems

UnknownHostException - if there are interop problems

Index

public Index(Object obj)
      throws IOException

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

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

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

getName

public String getName()
               throws IOException,
                      AutomationException

The name of the index.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

getName in interface IIndex

Returns:

The name

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

isUnique

public boolean isUnique()
                 throws IOException,
                        AutomationException

Indicates if the index is unique.

Remarks

If IsUnique is true, the field the Index was created for must not have duplicate values.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

isUnique in interface IIndex

Returns:

The isUnique

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

isAscending

public boolean isAscending()
                    throws IOException,
                           AutomationException

Indicates if the index is based on ascending order.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

isAscending in interface IIndex

Returns:

The isAscending

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getFields

public IFields getFields()
                  throws IOException,
                         AutomationException

The fields collection for this index.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

getFields in interface IIndex

Returns:

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

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setName

public void setName(String rhs1)
             throws IOException,
                    AutomationException

The name of the index.

Remarks

ArcGIS imposes a limit on the length of 16 characters on the length of attribute index names. This limit is based on the smallest allowable length within supported databases in order to facilitate distribution and sharing of data between different geodatabases.

Giving a shapefile index a name will apply the name to the index in memory, but the name will not be persisted to disk. On subsequent occasions when the indexes are opened, they will have system-defined names.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

setName in interface IIndexEdit

Parameters:

rhs1 - The rhs1 (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setIsUnique

public void setIsUnique(boolean rhs1)
                 throws IOException,
                        AutomationException

Indicates if the index is to be unique.

Remarks

Only non-versioned feature classes and tables can have unique indexes.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

setIsUnique in interface IIndexEdit

Parameters:

rhs1 - The rhs1 (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setIsAscending

public void setIsAscending(boolean rhs1)
                    throws IOException,
                           AutomationException

Indicates if the index is to be ascending.

Remarks

Whether you can add an index that is ascending is dependent on the DBMS.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

setIsAscending in interface IIndexEdit

Parameters:

rhs1 - The rhs1 (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setFieldsByRef

public void setFieldsByRef(IFields rhs1)
                    throws IOException,
                           AutomationException

The fields collection for this index.

Remarks

The maximum number of fields in the fields collection of an index is DBMS dependent.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

setFieldsByRef in interface IIndexEdit

Parameters:

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

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

esri_clone

public IClone esri_clone()
                  throws IOException,
                         AutomationException

Clones the receiver and assigns the result to *clone.

Product Availability

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

Specified by:

esri_clone in interface IClone

Returns:

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

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

assign

public void assign(IClone src)
            throws IOException,
                   AutomationException

Assigns the properties of src to the receiver.

Description

Use Assign method to assign the properties of source object to receiver object. Both objects need to have the same CLSIDs. Both source and receiver objects need to be instantiated.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

assign in interface IClone

Parameters:

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

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

isEqual

public boolean isEqual(IClone other)
                throws IOException,
                       AutomationException

Indicates if the receiver and other have the same properties.

Description

IsEqual returns True if the receiver and the source have the same properties. Note, this does not imply that the receiver and the source reference the same object.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

isEqual in interface IClone

Parameters:

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

Returns:

The equal

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

isIdentical

public boolean isIdentical(IClone other)
                    throws IOException,
                           AutomationException

Indicates if the receiver and other are the same object.

Description

IsIdentical returns true if the receiver and the source reference the same object.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

isIdentical in interface IClone

Parameters:

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

Returns:

The identical

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

IGPValue_getDataType

public IGPDataType IGPValue_getDataType()
                                 throws IOException,
                                        AutomationException

The data type of the value object.

Product Availability

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

Specified by:

IGPValue_getDataType in interface IGPValue

Returns:

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

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

isEmpty

public boolean isEmpty()
                throws IOException,
                       AutomationException

Indicates if the value object is empty.

Remarks

The IsEmpty method returns if this Value object has been set or not.

Product Availability

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

Specified by:

isEmpty in interface IGPValue

Returns:

The isEmpty

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

empty

public void empty()
           throws IOException,
                  AutomationException

Clears the value object.

Remarks

The Empty method clears this Value object and releases any associated objects.

Product Availability

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

Specified by:

empty in interface IGPValue

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getAsText

public String getAsText()
                 throws IOException,
                        AutomationException

Provides the value of the value object.

Remarks

The GetAsText method returns this Value object as a text string. For DataElement value objects it is the NameString. For simple value objects it is the text string for the scalar value.

Product Availability

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

Specified by:

getAsText in interface IGPValue

Returns:

The text

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setAsText

public IGPMessage setAsText(String text)
                     throws IOException,
                            AutomationException

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

Remarks

The SetAsText method sets the value of this Value object as a text string. For DataElement value objects it is the NameString. For simple value objects it is the text string representing the scalar value.

Product Availability

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

Specified by:

setAsText in interface IGPValue

Parameters:

text - The text (in)

Returns:

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

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

serialize

public void serialize(IXMLSerializeData data)
               throws IOException,
                      AutomationException

Serializes an object to XML.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

serialize in interface IXMLSerialize

Parameters:

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

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

deserialize

public void deserialize(IXMLSerializeData data)
                 throws IOException,
                        AutomationException

Deserializes an object from XML.

Product Availability

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

Supported Platforms

Windows, Solaris, Linux

Specified by:

deserialize in interface IXMLSerialize

Parameters:

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

describe

public Object describe(String name)
                throws 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:

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