com.esri.arcgis.carto
Interface IExpression

All Superinterfaces:

Serializable

public interface IExpression
extends Serializable

Provides access to members that control expression calculation.

Product Availability

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

Method Summary

double	calculate(IFeature pFeature) Perform the calculation.
String	getExpression() Expression string applied to the field of each row in the cursor.
boolean	isValid(ITable pTable) Check the validity of the expression.
void	setExpression(String pExpression) Expression string applied to the field of each row in the cursor.

Method Detail

getExpression

String getExpression()
                     throws IOException,
                            AutomationException

Expression string applied to the field of each row in the cursor.

Product Availability

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

Returns:

The pExpression

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

setExpression

void setExpression(String pExpression)
                   throws IOException,
                          AutomationException

Expression string applied to the field of each row in the cursor.

Product Availability

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

Parameters:

pExpression - The pExpression (in)

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

calculate

double calculate(IFeature pFeature)
                 throws IOException,
                        AutomationException

Perform the calculation.

Product Availability

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

Parameters:

pFeature - A reference to a com.esri.arcgis.geodatabase.IFeature (in)

Returns:

The result

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

isValid

boolean isValid(ITable pTable)
                throws IOException,
                       AutomationException

Check the validity of the expression.

Product Availability

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

Parameters:

pTable - A reference to a com.esri.arcgis.geodatabase.ITable (in)

Returns:

The valid

Throws:

IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.