org.opengis.filter

Interface PropertyIsNull

All Superinterfaces:

Filter

All Known Implementing Classes:

IsNullImpl, NullFilterImpl

@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

Author:

Chris Dillard (SYS Technologies)

Field Summary

Fields

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

Fields inherited from interface Filter

EXCLUDE, INCLUDE

Method Summary

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

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

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

Returns the expression whose value will be checked for null.