Package org.geotools.api.filter

Interface PropertyIsNil

All Superinterfaces:

Filter

All Known Implementing Classes:

IsNilImpl

public interface PropertyIsNil
extends Filter

Filter operator that checks if an expression's value is nil.

From the specification:

 The PropertyIsNil operator tests the content of the specified property and evaluates if it is nil.
 The operator can also evaluate the nil reason using the nilReason parameter. The implied operator
 for evaluating the nil reason is "equals".
 

Since:

GeoAPI 2.0

Author:

Justin Deoliveira, OpenGeo

Field Summary

Fields

Modifier and Type	Field	Description
static String	NAME	Operator name used to check FilterCapabilities

Fields inherited from interface Filter

EXCLUDE, INCLUDE

Method Summary

Modifier and Type	Method	Description
Expression	getExpression()	Returns the expression whose value will be checked for null.
Object	getNilReason()	The nil reason.

Methods inherited from interface Filter

accept, evaluate

Field Detail

NAME

static final String NAME

Operator name used to check FilterCapabilities

See Also:

Constant Field Values

Method Detail

getExpression

Expression getExpression()

Returns the expression whose value will be checked for null.

getNilReason

Object getNilReason()

The nil reason.