org.opengis.filter

Interface PropertyIsNull

All Superinterfaces:

Filter

@XmlElement(value="PropertyIsNull")
public interface PropertyIsNull
extends Filter

Filter operator that checks if an expression's value is null. A null is equivalent to no value present. The value 0 is a valid value and is not considered null.

Since:

GeoAPI 2.0

Method Summary

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

Methods inherited from interface org.opengis.filter.Filter

accept, evaluate, evaulate

Method Detail

getExpression

@XmlElement(value="PropertyName")
Expression getExpression()

Returns the expression whose value will be checked for null.