Package org.geotools.api.filter
Interface PropertyIsNull
-
- All Superinterfaces:
Filter
- All Known Implementing Classes:
IsNullImpl
,NullFilterImpl
public interface PropertyIsNull extends Filter
Filter operator that checks if an expression's value isnull
. Anull
is equivalent to no value present. The value 0 is a valid value and is not considerednull
.- Since:
- GeoAPI 2.0
- Author:
- Chris Dillard (SYS Technologies)
-
-
Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description Expression
getExpression()
Returns the expression whose value will be checked fornull
.
-
-
-
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 fornull
.
-
-